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SignalVu Vector Signal Analysis Software Printable Online Help

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1. Parameters Reference Ranges Lts Trace Scale Prefs mua 7 Review table 1 610 GHz 1 720 GHz Edit 7 Enabled Mask Save table Absolute amol 50 00 dBm 50 00 dBm Same Abs v Relative ampl C Same Lond usas Setting Description Range Selects the frequency range to which the settings on this tab are applied Start Readout of the start frequency for the selected range Stop Readout of the stop frequency for the selected range Edit Click this button to edit the Spurious Frequency Plan which defines the range frequency and whether or not measurements are taken in a range enabled disabled Enabled Specifies whether or not measurements are taken in the specified range Mask Selects the type of limits used for Pass Fail testing Spurs that exceed the mask settings are considered violations Abs Spurs that exceed the Absolute limits settings are identified as violations Rel Spurs that exceed the Relative limits settings are identified as violations Abs amp Rel Spurs that exceed both the Absolute and Relative limits settings are identified as violations Abs OR Rel Spurs that exceed either the Absolute or Relative limits settings are identified as violations Off Turns off limit testing for the selecting range Measurements are still taken in the range but violations are not flagged Signal peaks that exceed the Threshold and Excursions values will still be identified as spurs Absolute ampl Absolute ampl
2. ccc cece cece nen nen ene esse e e hne enne 137 Rho Measurement ti AA E A Ia 138 Iu 138 Ripple Measurement Pulsed RF DisplayS ooooooooconccoonconccconconcrnon eme mene 138 Rise Time Measurement Pulsed RF Displays sssssssssssssssseee mme eme 138 RMS Frequency Error Measurement isses esee eme seme sese eene 139 RMS Phase Error Measurement 0 0 0 cece cece cee eee nen nnn Een nee e eene eene 139 Scale Tab Amplitude vs Ime cei epe odds 139 Scale Tab EVM Magnitude Error vs Time sssssssssssesssssese e eme mesh een 140 Scale Tab Frequency vs Time oooooccononconccnnnconccno nro noo sehe mesh meses hene nere 140 Scale Tab Phase Error vs TIME jarnia e a E EE TOTE eme eme eese sese en 141 Scale Tab Phas vs TIME eenn i e n a a eme eme ehe a 142 Scale Tab Pulse Statistics ooooooorconcoonnconconnncnnconnncon eme mene messe e eene een 143 Scale Tab Pulse Traci seen pee erret be ceu oct o Re ER ue et dea Ete dh res aiu iure 143 Scale Tab RE EG Q vs Ime i ise d RP hee E terti re hne EE 144 Scale Tab RF Measurements sssssssssssssssssesssee eme eme eme e esee e eene eene en 145 Scale Tab Spectrogram Display ooooooooocconcocnncnnnonnncnn corn meme e mense emen een 146 Scale Tab Spectrum a Enn CE ES 147 SignalVu Vector Signal Analysis Software Printable Online Help V Table of Contents Scale Tab Spurious da dans 147 Scale Tab Time Overview iso 1
3. 3 Double click the Constellation icon in the Available Displays box This adds the Constellation icon to the Selected displays box 4 Click the OK button This shows the Constellation display Elements of the Constellation Display se mmm Freq 1 46200 GHz Refiev 0 00 dBm Ang teca Item Display element Description 1 Check mark indicator The check mark indicator in the upper left hand corner of the display shows when the Constellation display is the optimized display 2 Marker Readout Located to the left of the constellation plot or below it depending on the size of the window If markers are enabled the marker readout shows the time mag phase symbol marker and symbol value of the point with the selected marker 3 EVM Readouts The EVM readouts are located below the Constellation plot The readout shows EVM Peak 96 and location RMS 96 4 Plot Constellation graph Changing Constellation Display Settings see page 84 EVM vs Time Display The EVM vs Time Display shows the Error Vector Magnitude plotted over Time NOTE A maximum of 80 000 samples can be analyzed To show an EVM vs Time display 22 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Magnitude Error vs Time Display 1 Press the Displays button or select Setup gt Displays This shows the Select Displays dialog 2 From the Folders box select GP Digital Modulation 3 Double click t
4. Analysis failure Carrier detection failed SignalVu Vector Signal Analysis Software Printable Online Help Reference Error and Information Messages The instrument was unable to locate a carrier signal Try adjusting the Carrier Threshold or Integration BW values if the measurement has these controls Analysis Length was limited This message appears if the Results Length the time over which the measurement computed its results is less than the Actual Analysis Length reported in the Analysis Time control panel tab and the Time Overview display The Results Length is indicated by the magenta line below the Time Overview graph This can occur because the acquisition contained more data samples than a measurement can process for example digital demodulation is limited to 80 000 samples or the measurement had to use some of the first and last samples for pre measurement processes Analysis length too small for current setup Increase the Analysis Length or decrease the RBW Spectrum ACPR MCPR Avg Tx not available in Volts units The Average Transmitted Power measurement is not defined for Volts Can t get acquisition data record No acquisition record currently exists in memory run an acquisition or recall a file or an error has occurred Repeat the acquisition Can t replay data from swept acq The measurement could not produce results because it is a real time only measurement but was asked to reanalyze Replay an acquisiti
5. Preset does not affect time or date settings the Windows XP operating system settings or Tools Menu items Tools Menu Provides access to several utilities for controlling instrument functions Command Description Search see page 89 Enables you to locate and highlight specified signal levels in Spectrum displays Options see page 78 Displays the Options control panel Options Settings Menu Bar Tools gt Options The Option settings control panel allows you to set some global parameters Opbues re me DOT GPE Secerty C 78 SignalVu Vector Signal Analysis Software Printable Online Help Reference Settings tab Window Menu Description Save and Export The instrument can automatically name saved files by appending a number to a base file name Use this tab to enable disable automatic naming of files For example if Automatically Increment Filename Number is disabled when you select Save from the File menu you will have to enter a name for the file GPIB Do not use this tab to set the GPIB address for the instrument Use the Utilities GPIB Configuration control window in the TekScope application to set the instrument GPIB address Security Selecting the Hide Sensitive readouts checkbox causes the instrument to replace measurement readouts with a string of asterisks Colors Use this tab to select different color schemes for the measurement graphs Colors The Color scheme s
6. Removes all markers Touch screen Menu for Spurious Display The Touch screen actions menu in the Spurious display has some minor changes compared to the standard version used in other displays 52 SignalVu Vector Signal Analysis Software Printable Online Help Reference Elements of the Display Pan Reset scale Marker to peak Next peak b Add marker Delete marker All markers off Single range Marker gt Sel Spur Icon Menu Description s Single range Changes the current multi range display to a single range display The displayed range is the range in which you display the touchscreen actions menu Selecting Single range from the menu is equivalent to selecting Single on the Settings Parameters tab a Multi range Changes the current single range display to a multi range display Selecting Multi range from the menu is equivalent to selecting Multi on the Settings gt Parameters tab Marker gt Sel Spur Moves the selected marker to the selected spur Elements of the Display The main areas of the application window are shown in the following figure SignalVu Vector Signal Analysis Software Printable Online Help 53 Reference Menu bar Trace controls and readouts Title bar Application toolbar SS T Ven An Meun fp em WnEe p 00 0 x warte sese me J Acq J na Freq 9 700 Gir gt RefLer 0 0 8m amo Repay Run Y Trace 1
7. 66 The main menus are SignalVu Vector Signal Analysis Software Printable Online Help Reference Menu File see page 67 File Menu Description Select measurements open and save files print documents and preset View see page 73 Change display size display the Marker toolbar and Status bar Run see page 75 Start stop and abort acquisitions replay measurements select single or continuous acquisition mode Markers see page 77 Define markers and search for signal peaks Setup see page 77 Change settings for acquisition analysis and measurements Tools see page 78 Perform searches and configure user preferences Window see page 79 Controls the size and layout of displays within the SignalVu application Help see page 79 Access the online help display information about the instrument hardware and software File Menu Command Recall see page 67 Description The Recall dialog enables you to recall saved data setups and traces Save see page 68 Saves a file without asking for a file parameters based on most recent settings Save As see page 68 Displays the Save dialog enabling you to specify the parameters of the save operation Data Properties see page 106 Displays characteristics of the most recently analyzed record in the display Print see page 69 Prints the selected display Print Preview s
8. F Fall Time measurement 113 FastFrame 171 FFT 171 File formats 56 File Menu 67 filter 171 Filter Parameter 123 Filter Shape 98 Find tab 113 finding bursts in data 113 FlatTop FFT Window 98 FM 171 181 Index FMT Frequency Mask Trigger 172 frame 172 Freq amp Span tab 115 Freq Estimation tab 115 Freq Span amp RBW tab 114 frequency 172 frequency band 172 Frequency Deviation measurement 117 frequency domain view 172 frequency drift 172 Frequency error measurement 117 Frequency Mask Trigger FMT 172 frequency range 172 frequency span 173 Frequency tab 117 Frequency vs Time Settings 85 Frequency vs Time display 12 Full Screen 73 G Gain Imbalance measurement 117 GPIB 173 GPIB tab 78 graticule 173 Graticule On Off 130 grayed out 173 H Hanning FFT Window 98 Help Menu 79 Hide sensitive readouts 78 Q 173 IF 173 import 173 Information messages 59 input selecting 5 input impedance 174 Installed options 4 IQ Origin Offset measurement 117 IQ Sampling Parameters Tab 118 IQ vs time view 15 is greater than search 107 is inside mask 106 182 is inside mask search 107 is less than search 107 is outside mask 106 is outside mask search 107 K Kaiser FFT window 98 L Levels tab 118 Limit lines 89 Limits tab Spurious display 119 LISN 174 local oscilllator LO 174 Log Horizontal 147 Magnitude Error m
9. selectable in the Analysis Time tab as either Acquisition Start or Trigger Spectrum Length The amount of data in terms of time from which spectrum traces are computed Auto When enabled causes the instrument to set the Spectrum Length value based on the RBW setting Actual This is a displayed value not a setting It is the Spectrum Length time being used by the analyzer this value may not match the Spectrum Length requested in manual mode The actual spectrum length is always an integer multiple of the time needed to support the RBW value Time Measurement This is the time in seconds relative to the time reference point in the first acquisition record in the data set 150 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Trace Tab Constellation Display Trace Tab Constellation Display Menu Bar Setup gt Settings gt Trace Application Toolbar Front Panel Settings The Trace tab allows you to set the trace display characteristics of the Constellation display Moduktion Advanced Params Find Analysis Time 113 Prefs Points symbol 8 v Vectors Constellation Ponts Setting Description Points per Symbol Select how many points to use between symbols when connecting the dots Values 1 2 4 8 Vectors Constellation Points Selects whether to draw lines vectors between constellation points in the display Trace Tab Frequency vs Time The Trace Tab
10. 6 Center Frequency Displays the Center Frequency To change the value click the text and enter the frequency with a keyboard For fine adjustments you can use the mouse wheel 7 Reference Level Displays the reference level To change the value click the text and enter a number using a keyboard or use a mouse scroll wheel 8 Replay Runs a new measurement cycle on the existing acquisition data record using any new settings 9 Run Starts and stops data acquisitions When the instrument is acquiring data the button label has green lettering When stopped the label has black lettering You can specify the run conditions in the Run menu For example if you select Single Sequence in the Run menu when you click the Run button the instrument will run a single measurement cycle and stop If you select Continuous the instrument will run continuously until you stop the acquisitions 10 Check mark indicator The check mark indicator in the upper left hand corner of the display indicates the display for which the acquisition hardware is optimized Data File Formats 56 You can save different types of data for later recall and analysis SignalVu Vector Signal Analysis Software Printable Online Help Reference Saved File Types Data File Formats File Type File Extension Description Setup files setup Setup files enable you to save instrument settings for later recall Using these files saves setup
11. 7 To set the spacing between channel centers enter the required value in the Channel Spacing value box 8 To set the channel bandwidth enter the required value in the Channel Bandwidth value box 9 After you have configured the channel settings click the close button in the Settings panel or press the Settings button again to remove the settings panel 10 Press the Run button to take the measurements Viewing results Measurement results are displayed in a table below the graph and within the graph itself which can be enabled disabled in the Settings gt Prefs tab To see all measurements you might need to scroll the table The size of the results table can be changed by dragging the horizontal divider bar between the graph and table areas Avg Channel Ch Offset Lower Upper Power Main Ai 5 MHz 55 76 dB 58 33 dB 10 66 dBm A2 10 MHz 56 39 dB 58 40 dB A3 15 MHz 58 58 dB 57 74 dB Heading Description Channel Identifies the displayed channels A1 means the first adjacent channel A2 means second adjacent channel Adjacent channels are numbered according to their offset from the Main channel The closest channel is numbered 1 The next closest channel is numbered 2 and so forth Lower The power measured for the lower adjacent channel Adjacent channel power measurements are displayed in dB relative to the Main channel Upper The power measured for the upper adjacent channel Adjacent channels power me
12. 7 pas OW Detection Chan width 40 000 MHz 400 000 kHz v Auto Peak Threshold Integration 8W 15 00 Bm 1 000 MHz To set the power reference to Carrier 1 Select Carrier from the Power reference drop down list This displays several parameters 2 To set the Carrier frequency click Edit This displays the Edit Range and Carrier frequencies dialog box E Edit Range and Carrier frequencies Carrier Start Freq Stop Freq Enabled Frequency 1 500000 GHz 1 610000 GHz 1 720000 GHz 1 720000 GHz 1 830000 GHz 1 830000 GHz 1 940000 GHz 1 940000 GHz 2 050000 GHz 2 050000 GHz 2 160000 GHz 2 160000 GHz 2 270000 GHz 2 270000 GHz 2 380000 GHz 2 380000 GHz 2 490000 GHz Channel width 40 000 MHz Frequency bands of carrier and ranges cannot overlap 300 A B C D E F G H COOR C93 E 3 Specify the necessary values in the Frequency and Channel width entry boxes under Carrier Click OK 4 Specify the Threshold level 5 Specify the Integration BW The Integration BW is the bandwidth over which the carrier is measured 6 Although Auto is the recommended setting you can specify the Resolution Bandwidth by changing the value in the Res BW entry box 7 Set the Detection method Select either Peak or Average NOTE If the power level measured over the Integration BW about the carrier frequency is below the threshold level the instrument concludes that no carrier is present and no relative measurem
13. Description EVM The normalized RMS value of the error vector between the measured signal and the ideal reference signal over the analysis length The EVM is generally measured on symbol or chip instants and can be reported in units of percent or dB EVM is usually measured after best fit estimates of the frequency error and a fixed phase offset have been removed Phase Error The RMS phase difference between the measured signal and the ideal reference signal Magnitude Error The RMS magnitude difference between the measured signal and the ideal reference signal IQ Origin Offset The magnitude of the DC offset of the signal measured at the symbol times It indicates the magnitude of the carrier feed through signal Gain Imbalance The gain difference between the and Q channels in the signal generation path Constellations with gain imbalance show a pattern with a width that is different from height Rho p The normalized correlated power of the measured signal and the ideal reference signal Like EVM Rho is a measure of modulation quality The value of Rho is less than 1 in all practical cases and is equal to 1 for a perfect signal measured in a perfect receiver Frequency Error The frequency difference between the measured carrier frequency of the signal and the user selected center frequency of the analyzer Quadrature Error The orthogonal error between the and Q channels The error shows
14. see page 119 O Indicates the selected spur when it is not in violation of the limits The selected marker is highlighted in the Spur table below the graph with a blue background 1 2 3 A Spur number The number indicates the row in the spur table that corresponds to the spur The instrument can display up to 999 spurs A B C D Identifies the enabled ranges Green bar Indicates the range selected on the Settings gt Limits see page 119 and Settings gt Ranges see page 132 tabs Ref Indicates the location of the power reference See Settings gt Reference see page 134 Elements of the Spur Table E 1 899025 2 049037 G Frea Rel 302 987 MHz Lima Rel 152 975 MHz 102 301 887 MHz MES 152 012 MHz 17 2 300 925 MHz 150 912 MHz 22 299 962 MHz 149 950 MHz 148 025 MHz 298 037 MHz HER SignalVu Vector Signal Analysis Software Printable Online Help 39 Taking Measurements Pulse Statistics Display Column Description Spur A number that identifies a spur in the graph area The instrument can display a maximum of 999 spurs Range The letter representing the frequency range where the spur is located Freq Abs The absolute frequency at which the spur occurs Freq Rel The relative frequency at which the spur occurs The relative frequency is the difference between the absolute frequency absolute and t
15. see page 162 Sets Trace display parameters Scale see page 147 Sets vertical scale parameters Prefs see page 130 Specifies whether or not certain display elements are shown Spectrogram Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for the Spectrogram display are visible when Spectrogram is the selected display Settings tab Description Freq amp Span see page 115 BW see page 98 Sets frequency and span parameters for the Spectrogram display Sets Resolution Bandwidth and windowing parameters Trace see page 153 Sets Trace display parameters Scale see page 146 Sets vertical scale parameters Prefs see page 130 Specifies whether or not certain display elements are shown Spurious Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The measurement settings for the Spurious display are shown in the following table Settings tab Parameters see page 127 Description Specifies whether the graph displays one range or multiple ranges Specifies whether all spurs are shown or only spurs over specified limits Enables the use of CISPR filters and detectors Reference see page 134 Specifies the Power Reference level Ranges see page 132 Limits see page 119 Specifies start and stop frequencies of ranges and which ranges to take measur
16. see page 44 Displays the Define Marker control panel Setup Menu The Setup menu provides access to control panels that specify parameters for numerous vector signal analyzer functions Command Description Displays see page 77 Displays the Displays control panel Settings see page 80 Displays the Settings control panel for the selected display Acquire see page 81 Displays the Acquire control panel Analysis see page 82 Displays the Analysis control panel Preset see page 78 Initiates the Preset Application Presets see page 70 Displays the Application Presets window Displays Menu Bar Setup gt Displays Application Toolbar Displays Use the Select Displays dialog to choose the displays that appear on the screen SignalVu Vector Signal Analysis Software Printable Online Help 17 Reference Preset To select displays 1 Press the Displays button or select Setup gt Displays 2 Select one of the choices under Folders The folder chosen determines the choices available in Available displays 3 Double click the desired display in the Available displays box or select the desired display and click Add 4 Click OK Preset Menu Bar Setup gt Preset Preset resets settings and clears all acquisition data Settings and acquisition data that have not been saved will be lost After Preset resets the analyzer settings it displays the Spectrum view
17. 5 II ar Eee setis yep Ea TU EI e Ai aan 168 CDMA v a do dci 169 Center Fr MET EEEEEm MTMST 169 Check Mark Indicators ai aiii 169 CISPR 169 OW 169 CW Signal A iad walled A AA 169 DAN LA adds 169 UB ii 170 vi SignalVu Vector Signal Analysis Software Printable Online Help Table of Contents A a ei e ee de a E 170 A A A t er 170 BUY oue A eb e e eee dde add 170 Decibels sao 170 Display Reference Level eese etd d id 170 DIStOEUOT roe SEED ERE ERR SERERE O PERRO ree eS 170 DyMaMic Ranges TENE MS 171 ENIM deceat adan 171 EXPO a metr EET NERO oe ck aa NE e A tute UR betae Ned Ea 171 Pasthrame d IAS EA 171 RO 171 O OA 171 js 171 Frame EET 172 ETE QUCNC Yer a esee se ette irs det Pme sient Da gritar RR er e sf 172 Frequency Badoo iot t Up ead aT A EE E RET 172 Frequency Domain o Fe Saas 172 Frequency D UELLE 172 Frequency Mask THAT ec E uet Ede e vede aee Ede Oa eee ege Me i D dao 172 Frequency Ri DER ER RAYS 172 Erequency Span c ees eese tes ere aere ee eee AA Ee dele E FERRI SEE ideae gr pesdbedae peccatore ets 173 PIB pis Po toes es Bie AG AEM digerit no EET Pie RA oa Ae dedu DORA 173 ratico Te nec CURE ties t sere dover A 173 Grayed Out ii Ses nied Ty pecebales be SEE eps 173 TQ EIL 173 A A det cose S Mute sun Exon id IARE 173 Odin A A ter 173 Input Mnped nce it A E IOS IO MEE EE ORE aia a 174 LIN itte ose o
18. 87 Pulse Statistics Settings see page 88 Pulse Table Display Settings see page 88 Pulse Trace Settings see page 88 RF I Q vs Time Settings see page 89 Search Limits Testing Settings see page 89 Signal Quality Settings see page 90 Spectrogram Settings see page 91 Spectrum Settings see page 90 Spurious Settings see page 91 Symbol Table Display Settings see page 92 Time Overview Settings see page 92 Acquire Control Panel Menu Bar Setup gt Acquire Application Toolbar Acq Selecting Acquire displays the Acquire control panel These settings control the hardware acquisition parameters for the oscilloscope Normally sampling parameters are automatically adjusted for selected measurements You can use Acquire to change these parameters if necessary Vertical 1Q Sampling Parameters Scope Settings Scope Data Channel CH1 Ref Level 0 00 dBm Coupling DC Termi E O Bandwidth 8 000 GHz OS ane Setting Description Vertical see page 165 Sets the channel used and reference level SignalVu Vector Signal Analysis Software Printable Online Help 81 Reference Amplitude vs Time Display Settings Setting Description IQ Sampling Parameters see Set Sampling parameters page 118 Scope Settings see page 149 Sets the SignalVu software to control oscilloscope acquisition parameters or use the current oscilloscope settings Sco
19. ACLR Multi Carrier ACLR Power vs Time CCDF OBW EBW and Spur Search B Advanced Signal Analysis Suite Opt SVP provides automated pulse measurements including rise time pulse width and pulse to pulse phase provide deep insight into pulse train behavior General Purpose Digital Modulation Analysis Opt SVM provides vector signal analyzer functionality m Tektronix OpenChoice enables easy transfer to a variety of analysis programs such as Excel and Matlab Product Software Occasionally new versions of software for your instrument may become available at our Web site Visit www tektronix com software for information SignalVu Vector Signal Analysis Software Printable Online Help 3 About Your Instrument Options Options To view a listing of the software options installed in your software select Help gt About Your Tektronix Vector Signal Analysis Software Options can be added to your instrument For the latest information on available option upgrades see the Tektronix Web site Documentation In addition to the online help the following documents are available SignalVu Reference Tektronix part number 077 0224 XX This document provides a brief overview of the SignalVu software It identifies elements of the SignalVu screen elements of different displays and includes a menu tree The Reference Manual is provided as a printable PDF file B SignalVu Programmer Manual 077 0223 XX This document provides sup
20. BW Tab The BW bandwidth tab allows you to change Resolution Bandwidth and Video Bandwidth settings set the windowing method used by the transform process by selecting a filter shape and specify how gain and bandwidth are optimized a Freg amp Span BW Traces Scale Prefs Method O RBW 300 kHz Y Auto Span RBW ratio 100 Fiter Shape Kaser RBW v 7 VBW 30 Hz RF amp IF Optimization Auto v 98 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics BW Tab Setting Description RBW Sets the Resolution Bandwidth value to be used in the spectrum analysis view The value is italicized when Auto is selected Auto When Auto is checked the RBW is calculated as a percentage of the Span Kaiser is selected as the windowing method When Auto is unchecked the RBW is set by the user Selecting any Window other than Kaiser changes the RBW setting to manual Span RBW ratio If Auto is checked this value is used to calculate the RBW If Auto is unchecked this setting is not selectable Filter Shape Specifies the windowing method used for the transform when Auto is unchecked VBW Adjusts the VBW Video Bandwidth value RF amp IF Optimization This setting is not used by the SignalVu application Filter Shape Settings In the analyzer computationally efficient discrete Fourier transform algorithms such as FFT Fast Fourier Transform or CZT Chirp Z Transform are generall
21. Export format contains trace points and or scalar results produced by the measurement The file contains general information about the measurement settings at the top of the file and the results data in the second part of the file Groupings of settings or results are headed with text as described below At the top of the file is the measurement name and the date and time data was acquired The first grouping of settings are the Global Parameters These settings include the Measurement Frequency Acquisition Data Reference Level and others The second grouping of settings is Parameters These settings are specific parameters which vary depending on the measurement The next group is Trace Parameters which may not be present depending on the measurement Within this group there are parameters specific to a trace There will be a Trace Parameters group for each trace shown on the display The next group is Results These are scalar results for the measurement Next is Traces The Traces group consists of one or more Trace groups There is one Trace group for each trace Each Trace group contains background information about the trace units number of points x scaling and others depending on the measurement at the top of the group followed by the trace points Acquisition Data with Setup File tiq Format The file consists of two parts the header that is in XML and the data that is in binary format Header The hea
22. For example Rise is the time between the 10 and 90 or 20 and 80 levels on the rising edge of the pulse When the Pulse Average Amplitude method is selected the same 100 level is used for both rising and falling edges Because some RF pulse types have droop a height difference between the beginning and ending points of the pulse top the 100 percent level on the rising edge may not be equal to the 100 level on the falling edge The Independent method of pulse point location is designed for pulses with different 100 levels at their rising and falling edges The Independent method calculates the 100 level for the rising edge separately from the 100 level of the falling edge As a result the 10 20 50 80 and 90 levels are also different for the rising and falling edges allowing for more accurate measurements on pulses with droop 50 level Select Voltage to use 6 dB as the 50 point Select Power to use 3 dB as the 50 level Limits Tab Spurious Display Use the Limits tab to specify the pass fail parameters for the Spurious measurement When the Mask setting is set to any value except off the instrument identifies any signal peak that exceeds the specified limits as a violation and displays Fail on the screen If no signal peak exceeds the limits the instrument displays Pass on the screen SignalVu Vector Signal Analysis Software Printable Online Help 119 Reference Topics Limits Tab Spurious Display
23. Ifthe Actual Analysis Time is greater than 1 ms the CCDF Display will calculate the trace without any problems m Ifthe Actual Analysis time is less than 1 ms the CCDF Display will measure the data as best if can but if it receives fewer than 20 samples the CCDF display will clear the trace and report Not enough samples SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Parameters Tab Occupied BW Parameters Tab Occupied BW The Parameters tab enables you to specify parameters that control the Occupied BW measurement Freg amp RBW Parameters Scale Prefs Occupied BW Power 99 0 C Max Hold spectral data x dB level 26 0 48 Count Measurement BW 10 00 MHz Average results 19 Setting Description Occupied BW Power Specifies the proportion of power within the occupied bandwidth referenced against the total power in the measurement bandwidth x dB level x dB level defines the x dB BW level search threshold Measurement BW Specifies the frequency range used by the measurement Max Hold spectral data Enables the Max Hold function Average results Enables disables results averaging Note that this is not an averaging of the trace but an averaging of the results Count Specifies the number of results averaged to calculate the Occupied BW Range 2 to 10 000 x dB Level The x dB level determines the x dB BW The instrument analyzes the spectrum trace to loca
24. Multi range display mode 13 Bottom of graph readout Indicates the amplitude at the bottom of the graph This value changes with the dB div and Vertical Position settings Elements of the Spurious Graph Display SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Item 1 Display element Spurious Display Description The green line or shading indicates an Abs absolute limit The absolute limit is enabled when the mask is set to Abs Abs amp Rel or Abs OR Rel Note that absolute and relative amplitude masks can overlap The gray shaded area indicates a portion of the spectrum where no measurements are being taken The cyan line or shading indicates a Relative limit The relative limit is enabled when the mask is set to Rel Abs amp Rel or Abs OR Rel Note that absolute and relative amplitude masks can overlap abs rel Reminder that green shaded areas highlight absolute limits and cyan shaded areas highlight relative limits This indicates the selected spur when it is in violation of the limits In Run mode this is the peak spur violation The selected marker is highlighted in the Spur table below the graph with a blue background A spur marker Indicates a spur that does not exceed the mask settings See the Settings gt Limits tab see page 119 A violation marker Indicates a spur that exceeds the mask settings See the Settings gt Limits tab
25. Online Help Reference Topics Reference Tab Spurious Setting Description Power Reference Specifies the power reference level used for relative values and limits No reference Power level readings are calculated only for absolute values no relative values are calculated Manual level The reference level for relative measurements is specified by the Reference power level setting Carrier The reference level for relative measurements is based on the power level calculated at the specified carrier frequency Setting the Power Reference Level to No Reference Parameters Reference Ranges Limts Trace Scale Prefs Power reference v To set the power reference to No Reference B Select No reference from the Power reference drop down list Setting the Power Reference Level to Manual Level n Parameters Reference Ranges Limits Trace Scale Prefs Power reference v Reference power level 10 00 dim To set the power reference to manual level 1 Select Manual level from the Power reference drop down list This displays the Reference power level entry box 2 Specify the desired power level in the Reference power level entry box SignalVu Vector Signal Analysis Software Printable Online Help 135 Reference Topics Reference Tab Spurious Setting the Power Reference Level to Carrier pera Parameters Reference Ranges Limits Trace Scale Prefs Power reference y Camerfreg 1 500 GHz cu
26. Run mode to Single In Single mode as soon as one acquisition sequence completes acquisition stops Note that a single acquisition sequence can require more than one acquisition For example in a spectrum view the trace function might be set to Average 100 acquisitions Thus a complete acquisition sequence would consist of 100 acquisitions to produce 100 intermediate traces that are averaged together to create the final trace that is displayed Once the 100 acquisitions have been completed acquisition stops This is only a mode selector it does not initiate an acquisition 76 SignalVu Vector Signal Analysis Software Printable Online Help Reference Continuous Acquisition Mode Continuous Acquisition Mode Menu bar Run gt Continuous Selecting Continuous places the analyzer in the Continuous acquisition mode In Continuous mode the analyzer acquires and displays acquisitions repeatedly The Continuous and Single Sequence acquisition modes are mutually exclusive Selecting Continuous restarts acquisitions Markers Menu The Markers menu provides to settings that define and control the location of markers Setting Description Peak see page 129 Moves the selected marker to the highest peak on the trace Next Peak gt Moves the selected marker to next peak depending on the setting chosen Marker to Center Frequency Sets center frequency to the frequency of the selected marker Define Markers
27. Select the measurements you wish to take from the list of measurements 4 Click the close box to remove the Settings control panel Changing the Pulse Table Display Settings see page 88 Pulse Trace Display The Pulse Trace display enables you to take and display measurements on pulses The Pulse Trace display shows the RF pulse that is being measured in the display and shows the measurement results along the left side of the window You can also choose to display arrows and lines in the graph that illustrate where on the pulse the measurement is being taken Elements of the Pulse Trace Display c pns Freq 9 66724 GHz RefLev 0 00 d m Aro secs Run SignalVu Vector Signal Analysis Software Printable Online Help 43 Taking Measurements Define Markers Control Panel Item Display element Description 1 Optimized indicator The check mark indicator in the upper left hand corner of the display shows when the Pulse Trace display is the optimized display 2 Result Use this list to select the measurement to show The measurement chosen here selects the same result to be displayed in the Statistics view and highlighted in the Table view Selecting a result in any of these views causes the same result to be selected in all of them 3 Pulse Selects which pulse result is shown Like the Result this selection is shared with the Statistics and Table views The maximum number of pulses that can be measured
28. Spectrogram Display Elements of the Spectrogram Display tengs Tro JLaca Ana gt Frea 1 50000 GHz RefLev 0 00 dBm Overlap 0 Peak Normal dE 122 8 lo Span 10 00 MHz Pos 0 8us T Autascale CF 1 50000 GHz Item Display element Description 1 Scale Sets the vertical scale factor increasing or decreasing the amount of time in each line 2 Total time This value represents the total time displayed in the Spectrogram 3 RBW Sets the resolution bandwidth Note that when the RBW is set to Auto its value is italicized 4 VBW Enables the VBW Video Bandwidth filter See Setup gt Settings gt BW tab see page 98 5 Pos Position indicates the bottom line visible in graph 6 Autoscale Resets Vertical and Horizontal scale and Pos to default values 7 T Trigger indicator This icon indicates the trigger point within the current acquisition 8 CF Sets the Center Frequency 9 Span Sets the span of the spectrogram display 10 Current data record indicator This blue line indicates the current data record When the analysis length is short the blue line appears as a thin line much like the selected indicator line When the analysis length is relatively long the blue line is much taller than shown in the illustration 11 Selected indicator This line indicates the line that will appear in the Spectrum display if the Spectrogram trace is enabled
29. Time display 25 Phase Error vs Time settings 87 Phase vs Time display 13 Phase vs Time settings 87 SignalVu Vector Signal Analysis Software Printable Online Help pictures saving 9 Pk Avg measurement 129 PM 176 power measurements 7 Prefs tab 130 Spectrum display 130 Spurious display 131 Preset File menu 72 Preset Settings menu 78 presets application 70 primary marker 176 Print 69 Print Preview 69 Product Description 3 PSK 176 pulse measurements 8 Pulse Statistics display 40 Pulse Statistics display settings 88 Pulse Table display 41 Pulse Table display settings 88 Pulse Trace display 43 Pulse Trace display settings 88 Pulse Width measurement 132 Pulse to Pulse Carrier Phase measurement 132 Pulse to Pulse Frequency Difference 131 Q QAM 176 Quadrature Error Measurement 132 R Range file 56 Ranges Tab Spurious display 132 RBW 177 RBW min 100 kHz 105 real time analysis 177 real time bandwidth 177 real time seamless capture 177 Red background cells 37 Ref Level Vertical tab 165 Reference Filter 123 Reference Level 177 Reference tab Spurious display 134 Repeat 137 Repetition Interval measurement 137 Repetition Rate measurement 137 Replay 76 residual FM incidental FM 177 residual response 177 results saving 9 Resume 76 RF 8 IF Optimization 98 RF Channel Power measure ment 137 RF amp Q vs Time display 15 RF amp Q vs Time s
30. Topics Data Properties Data Properties The Data Properties command in the File menu displays a listing of acquisition related information about the last data analyzed The last data can be from the current acquisition or it could be from a recalled data file r Measurement data properties SEE Last record analyzed in selected Display Timestamp 8 25 2008 1 27 37 PM Center frequency 91 5000 MHz BW 10 400 MHz Sample rate 24 414 MHz Samples per frame 545 Length per frame 22 323 us Frame number 1 of 1 Define Tab Search The Define tab sets the parameters for a search From this tab you specify which trace to search and what kind of violation to search for Search Define Actions Enable search Search in Spectrum Trace 1 v Search for greater than v 10 00 d8m 106 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Define Tab Search Enable a Search Search in Spectrumc Trace 1 v Search for outside mask v Edit imts Setting Description Search in Specifies which trace to search Search for Specifies what to search for You can specify a search based on a signal level or a mask Search In The choices for Search in are Spectrum Trace 1 Spectrum Trace 2 Spectrum Trace 3 Spectrum Math Trace and Spectrogram Trace NOTE If you select a trace in the display that is not the selected trace you will not see the results of the Search until you s
31. below the top of the graph Horizontal Scale Allows you to change the range of frequencies shown in the graph without changing the span or measurement frequency Position Allows you pan the graph Autoscale Resets Scale to the Span setting Reset Scale Resets all settings to their default values Log scale Resets the display to show the frequency axis in a logarithmic scale Scale Tab Spurious The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency In effect these controls operate like pan and zoom controls Parameters Reference Ranges Limits Trace Scze Prefs Hof al Scale 100 00 cB Start 1 610 GHz Position 0 00 CBr Reset Scale Stop 2 160 GHz Autoscale Autoscale SignalVu Vector Signal Analysis Software Printable Online Help 147 Reference Topics Scale Tab Time Overview Setting Description Vertical Scale Changes the range of the amplitude shown between the top and bottom of the graph Position Adjusts the level shown at the top of the graph Autoscale Resets the Position so that the highest level on the trace appears below the top of the graph Horizontal Start Adjusts the frequency shown at the left edge of the graph This value does not change the frequencies of the ranges Stop Adjusts the frequency shown at the rig
32. binary format Use these files to save data for later recall and analysis When you save an Acquisition Data file the current Setup is always saved with the file At the time of recall you will be asked whether you want to restore only the acquisition data or both data and setup If the instrument is already set up for a specific measurement you will probably want to recall only the acquisition data Recalling both data and setup returns the instrument to the same state it was in at the time you saved the file Acquisition Data CSV These files contain IQ sample data before it has been processed by a measurement The acquisition data points are saved as IQ pairs Use this format to import the acquisition data into Microsoft Excel for further analysis Acquisition Data mat These files contain IQ sample data before it has been processed by a measurement The acquisition data points are saved as IQ pairs Use this format to import the acquisition data into MATLAB for further analysis Range file CSV These files contain a list of settings that describe how the instrument is set up for the Spurious measurement The file contains the number of ranges enabled the start and stop frequencies for each enabled range the limits for each enabled range the mask type and more SignalVu Vector Signal Analysis Software Printable Online Help 57 Reference Data File Formats 58 Results Export File Format The Results
33. gt Settings gt Freq amp Span tab to match the recalled trace Ifyou are using two recalled traces to generate the Math trace You must recreate at least one of the traces No burst detected The Burst Detection Mode see page 113 is On but no burst was detected in the signal Check that the Threshold setting is properly set Not enough samples for current setup The measurement was not able to run because the combination of analysis length offset and measurement bandwidth relative to acquisition bandwidth were such that not enough samples were available for the measurement to analyze This can occur when two or more displays are shown and one display requires a wide acquisition bandwidth and another display requires a much narrower bandwidth The display requiring the much narrower bandwidth must decimate and filter the acquisition record which can result in too few samples left for the measurement B Increase the Analysis Length to provide more samples SignalVu Vector Signal Analysis Software Printable Online Help 63 Reference Error and Information Messages 64 m Close any displays you don t currently need No FFT not all pulses have results If a pulse cannot be measured because its shape is too indistinct or it does not meet the parameters that define a pulse see page 128 its results will be for every measurement on that pulse The instrument cannot compute an FFT No pulses found The instr
34. is limited to 1000 4 Pulse threshold indicator This green triangle indicates the power threshold used to detect pulses See Settings gt Params gt Power threshold to detect pulses 5 Autoscale Set the axes to values that show all trace points 6 Horizontal offset and scale Located along the bottom edge of the trace display these controls specify the offset and scale on the horizontal axis 7 Top of graph adjustment Sets the power level shown at the top of the graph If the number is greater than the Ref Level a white line will appear in the graph to indicate the Ref Level 8 Vertical scale Sets the vertical scale value Changing the Pulse Trace Display Settings see page 88 Define Markers Control Panel The Define Markers Control Panel is used to enable markers and set their properties You can set up to five markers including the marker reference Markers are shown in most displays Markers have two types of on screen readouts Absolute and Delta When Readouts is set to Absolute each readout displays only the marker s position on the trace In Frequency displays this means the marker readout shows the frequency and power of the trace at the marker position When Readouts is set to Delta each delta marker M1 M4 readout displays both the marker s position on the trace and the difference between its position and the position of the Reference Marker MR Defining Markers Define M Propert Define Pea ri Markers Ref
35. line best fit representing the top of the pulse Pulse Pulse Phase Difference The phase difference between the selected pulse and the first pulse in the analysis window Pulse Pulse Freq Difference The difference between the frequency of the current pulse and frequency of the previous pulse The instantaneous frequency is measured at a user adjustable time following the rising edge of each pulse RMS Freq Error The RMS Frequency Error measurement is the RMS average of the Freq Error vs Time trace computed over the Measurement Time Max Freq Error The maximum frequency error is the difference between the measured carrier frequency of the signal and the user selected center frequency of the analyzer RMS Phase Error The RMS Phase Error measurement is the RMS average of the Phase vs Time trace computed over the Measurement Time Max Phase Error The phase is measured at each point during the pulse s ON time The phase error for each point is the difference between the measured phase value and the calculated ideal phase value After the phase error is calculated for all points in the acquisition record the largest error in the positive direction and the largest in the negative direction are determined Whichever of these two values has the greater absolute value is designated the Max Phase Error Freq Deviation The Frequency Deviation measurement is the difference between the maximum and minimum measur
36. modulated RF signals Vertical Scale Factor Vertical Display Factor The number of dB volts etc represented by one vertical division of a spectrum analyzer display screen Violation A violation is a spur that exceeds either an Absolute or Relative limit depending on the selected mask specified on the Settings gt Limits tab A spur is a signal peak that exceeds a user definable threshold See Spurious gt Settings gt Ranges and excursion setting 180 SignalVu Vector Signal Analysis Software Printable Online Help Index A Abort acquisition 76 About the RTSA 93 accuracy 167 ACLR 167 ACLR measurement 95 ACPR measurement 167 Acq BW too small 105 Acquire control panel 81 acquisition 167 acquisition data saving 9 acquisition memory usage 118 Actions Tab 94 Adjacent Channel Power measurement 95 Advanced Params Tab 95 Amplitude vs Time display 11 Amplitude vs Time display Settings 82 Analysis control panel 82 analysis length 167 analysis time 167 Analysis Time tab Analysis control panel 96 Analysis Time tab GP Digital Modulation 97 application presets 70 saving 9 ASK 168 automatically generate filenames 78 Average Channel Power measurement 98 Average ON Power measurement 98 B Blackman Harris FFT Window 98 block 168 Blue background cells 37 BW Tab 98 BW Tab Amplitude vs Time display 100 C calibrator 168 carrier 168 Carrier Feedthrough measure ment 1
37. pulse measurements Average ON Power Peak Power Average Transmitted Power Pulse Width Rise Time Fall Time Repetition Interval Sec Repetition Rate Hz Duty Factor 96 Duty Factor Ratio Ripple Droop Pulse Pulse Phase Difference Pulse Pulse Frequency Difference RMS Frequency Error Maximum Frequency Error RMS Phase Error Maximum Phase Error Frequency Deviation Phase Deviation and Time See Measurements see page 7 for definitions Tek RSA6100A Pulse Table si 2x Disotays Markers sextings Trig J Acg Ana Freq 1 48630 GHz gt RefLev 0 00 dBm Replay Puan Y Freq Error 12 49 kHz Auto Pulse Avg ON Peak Avg Tx Rsa Fal Rep Int Rep Rate 13 2 84 Bm 2 52 dBm 8 25 d8m 110 0 ns 103 9 ns 15 99 us 62 52 kHz 12 2 83 dBm 2 53 dBrr 8 25 dam 109 7 ns 110 4 ns 16 00 us 62 51 kHz 11 2 84 dBm 2 53 dBm 8 25 dBm 93 42 ns 108 1 ns 16 00 us 62 49 kHz 10 2 71 dim 6 24 dm 100 7 ms 107 1 ns 16 00 us 62 49 kHz 9 8 45 5 A 3 2 61 dBm 8 25 dm 106 5 ns 99 87 ns 15 99 us 62 53 kHz 2 51 dBrr 8 25 dm 109 9 ns 104 2 ns 16 00 us 62 52 kHz 2 52 dBm 8 25 Bm 109 6 ns 110 4 ns 16 00 us 62 51 tz 2 53 dBm 8 24 dm 93 45 ns 108 5 ns 16 00 us 62 49 kHz 2 71 dBrn 8 24 Bm 100 4 ns 106 8 ns 16 00 us 62 49 Hz 2 61 dBm 8 24 Bm 106 8 ns 99 26 ns 15 99 us 62 53 Hz 2 51 dBm 8 25 Bm 110 0 ms 104 2 ns 16 00 us 62 52 kHz 2 53dBm 68 25 d8m 109 8 ns 11035 MONTE 62 51 9 2 53 dBm 8 24 Bm 93 97 ns 109 1 ns 16
38. select the icon and click Add The icon will appear in the Selected displays box and will no longer appear under Available displays 4 Click OK Elements of the Display Item Display element aa RefLev 0 00 dim mal nentes Run Description 1 Top of graph adjustment Use the knob to adjust the value of the vertical scale Offset adjustment Adjusts the level shown at the bottom of the display Adjusts the vertical and horizontal settings to provide the best display 2 3 Autoscale button 4 Horizontal Offset Adjusts the horizontal position of the signal Units can be either Symbols or Seconds Settings gt Analysis Time tab gt Units 9 Peak and RMS value readout Displays the Peak value of the magnitude error the RMS value of the magnitude error and the time at which it occurs within the acquisition Units can be either Symbols or Seconds Settings gt Analysis Time tab gt Units 6 Horizontal Scale Sets the time spanned by the graph Units can be either Symbols or Seconds Settings gt Analysis Time tab gt Units 7 Freq Error Freq Error is the difference between the Center Frequency and the measured frequency of the signal being tested This readout will be Freq Offset if the Freq Offset parameter on the Settings Advanced Params see page 95 tab is set to Manual Changing Magnitude Error vs Time Display Settings see page 85 24 SignalVu Vector Signal A
39. software Hardware Information This text box lists the serial number of the oscilloscope on which the software is running Copy Info The Copy Info button copies information about the instrument to the Windows clipboard This information may be useful if you need to have your instrument serviced The following text is an example of the information copied when you click Copy Info Tektronix Vector Signal Analysis Software V1 3 560 Installed Options SignalVu Vector Signal Analysis Software Printable Online Help 93 Reference Topics Essentials Opt SVE Actions Tab Pulse Measurements Opt SVP General Puspose Modulation Analysis Opt SVM Hardware Information Serial Number B000001 Actions Tab The Actions tab is used to specify an to action to be taken when the search condition is met Search Defne a Enable During Run or Replay During Run only P Search On match 3 Beep AutaSave acquisition data 3 Stop AutoSave trace AutoSave picture Setting Description During Run or Replay Actions specified here will occur in either Run mode or Replay mode Beep The analyzer beeps when the search condition is met There will be no sound if the instrument hardware does not support audible output Stop The analyzer stops when the search condition is met During Run Only Actions specified here are taken only during Run mode while acquiring live data AutoSave acquisition data Saves acquisition data
40. the input signal and other parameters that control the demodulation of the input signal Modulation Advanced Params Find Analyss Time Trace Prefs Modulation type QPSK v Measurement Filter RootRasedCosne v Symbol Rate 4 18 MHz Reference Filter RasedCosine v Filter Parameter 0 220 SignalVu Vector Signal Analysis Software Printable Online Help 123 Reference Topics 124 Modulation Tab Parameter Description Modulation type Specifies the type of modulation used in the input signal Symbol Rate Specifies the symbol rate in Hertz Measurement Filter Specifies the filter used for measurements Reference Filter Specifies the filter used as a reference Filter Parameter Enter a value used for the Measurement Filter and Reference Filter Modulation Type The modulation types that can be demodulated are Modulation type Description QPSK Quadrature Phase Shift Keying 8PSK 8 Phase Shift Keying D8PSK Differential Eight Phase Shift Keying DQPSK Differential Quadrature Phase Shift Keying PI ADQPSK Pi 4 Differential Quadrature Phase Shift Keying BPSK Binary Shift Keying 16QAM 16 state Quadrature Amplitude Modulation 32QAM 32 state Quadrature Amplitude Modulation 64QAM 64 state Quadrature Amplitude Modulation 128QAM 128 state Quadrature Amplitude Modulation 256QAM 256 state Quadrature Amplitude Modulation MSK Minimum Shift Keying Symbol Rate Enter the appropriat
41. to the mean power centered on an adjacent channel frequency In the 3GPP specification it is called ACLR Adjacent Channel Level Ratio and both the main channel and adjacent channels are required to be filtered with RRC Root Raised Cosine filters Acquisition A series of time contiguous frames This is also called a Block Analysis Length The length of time in the Analysis Time Analysis Time The portion of the acquisition record over which one or more measurements are calculated SignalVu Vector Signal Analysis Software Printable Online Help 167 Glossary ASK ASK Acronym for Amplitude Shift Keying The process or result of a process in which the amplitude of the carrier is varied in accordance with the state of a digital input signal Block An integer number of time contiguous frames See also Acquisition Calibrator A signal generator producing a specified output used for calibration purposes Carrier The RF signal upon which modulation resides Carrier Frequency The frequency of the CW component of the carrier signal Carrier Signal The electrical signal typically a sine wave upon which modulation is impressed Carrier to Noise Ratio C N The ratio of carrier signal power to average noise power in a given bandwidth surrounding the carrier usually expressed in decibels 168 SignalVu Vector Signal Analysis Software Printable Online Help Glossary CDMA CDMA Acronym for Code Division Mu
42. unique for each measurement VBW The VBW setting enables disables the Video Bandwidth filter VBW is used in traditional swept analyzers to reduce the effect of noise on the displayed signal The VBW algorithm in the analyzer emulates the VBW filters of traditional swept analyzers The maximum VBW value is the current RBW setting The minimum VBW value is 1 10 000 of the RBW setting NOTE If you are following a procedure that says to set VBW to three times the RBW value or greater it means that the test should be conducted with no VBW effects In the SignalVu software this condition is met by disabling the VBW function 114 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Freq amp Span Tab Freq 8 Span Tab The Freq amp Span tab provides access to settings that control frequency settings for the trace display Freq amp Span Bw Traces Scale Prefs Center 1 50000 GHz Span 40 00 MHz Max Span Start 1 48000 GHz Stop 1 52000 GHz Step Size 2 0000 Mz V Auto Setting Description Center The frequency at the center of the trace display Start The frequency at the left edge of the trace display Stop The frequency at the right edge of the trace display Step Size Sets the increment decrement size for Center Start and Stop values Span The difference between the start and stop frequencies Max Span Sets the Span to the maximum value Center Start Stop and Span Frequ
43. while time is plotted along the horizontal axis Note that the trace s in the Amplitude vs Time display can be set to a maximum of 100 000 points however the actual number of trace points can extend up to 1 000 000 points if Max trace points is set to Never Decimate Ifthe Analysis Length includes more than the selected Max trace points value the trace is decimated using the method specified with the Detection control to be equal to or less than the Max trace points setting except when Max trace points is set to Never Decimate This decimated or undecimated trace is what is used for marker measurements and for results export You can set the Max trace points on the Settings gt Prefs tab To show Amplitude vs Time display 1 Press the Displays button or select Setup gt Displays 2 In the Select Displays dialog select General Signal Viewing in the Folders box 3 In the Available displays box double click the Amplitude vs Time icon or select the icon and click Add The Amplitude vs Time icon will appear in the Selected displays box and will no longer appear under Available displays 4 Click OK Elements of the Display Frog 7 02240 GHz gt Reflow 0 00 dim Repay LE 0 SignalVu Vector Signal Analysis Software Printable Online Help 11 Taking Mea surements Frequency vs Time Display Item Display element Description 1 Vert Offset Adjusts the vertical display offset 2 Vertical scale adjus
44. 0 J _ for Ripple Stop 50 fall un Setting Description Measurement point for Specifies the position along the pulse tops where the phase is measured This is a time pulse pulse results delay from the rising edge 50 point of each pulse Range 5 ns 100 ms Resolution 0 1 ns for keyboard entry proportional increment decrement between 1 10 of current value Portion of pulse top for Ripple Adjust how much of the ON time to use in computing the measurement Range 10 100 Resolution 1 Default 50 Measurement time for Freq amp Specifies the location on a pulse where the in pulse frequency and phase measurements Phase results are taken Auto When checked measurements are taken from the 9096 point on the rising edge to the 90 point on the falling edge Start and Stop controls are disabled when Auto is selected but they display the values in use Start Specifies where the starting point is located for frequency and phase measurements Range 100 ms Resolution 3 digits Default 0 Stop Specifies where the stopping point is located for frequency and phase measurements Range 100 ms Resolution 3 digits Default 0 Start Stop Start and Stop times should not overlap If the start and stop times do overlap the affected measurements display asa result and an error message is displayed FreqPhase meas start is later than stop Displaying the Windows Event Viewer When the analyzer generates an e
45. 00 carrier frequency 168 carrier signal 168 carrier to noise ratio C N 168 CCDF Complimentary Cumulative Distribution Function 100 CCDF display 28 CCDF display settings 83 CDMA 169 center frequency 169 Channel 165 Acquire control panel 5 Vertical tab 165 Channel Power and ACPR Adjacent Channel Power Ratio display 29 Channel Power and ACPR Settings control panel 83 Channel Power measurement 104 Channels tab ACPR 101 Channels tab MCPR 102 check mark indicator 53 CISPR 169 Colors tab 78 Constellation display 21 Constellation display settings 84 Continuous Acquisition Mode 77 Correct for Noise Floor 122 creating application presets 70 CW 169 CW signal 169 D DANL 169 Data file formats 56 dBfs 170 dBm 170 dBmV 170 dBuV 170 SignalVu Vector Signal Analysis Software Printable Online Help Index decibel 170 default settings restore 89 Define Markers 44 Define Peaks tab 45 Define tab 106 Define tab Pulsed RF 110 Delta Markers 44 description RSA6100A Series 3 display reference level 170 Displays 77 distortion 170 documentation 4 Droop measurement 112 Duty Factor Y measurement 112 Duty Factor Ratio measure ment 112 dynamic range 171 E Elements of the display 53 error message Windows Event Viewer 110 Error messages 59 Event Viewer 110 EVM measurement 113 EVM vs Time display 22 EVM vs Time Settings 84 export 171
46. 00 us 62 49 kH 2 73 dBm 8 25 68m 6 99 89 ns 107 1 ns 16 00 us 62 49 kHz 2 61 dBm 8 25 dBm 106 7 ns 96 26 ns 15 99 us 62 52 kHz 2 52 dBm 8 25 Bm 110 0 ns 104 1 ns 15 99 us 62 52 kHz 2 53 dB 8 25 Bm 109 4 ns 110 3 ns 16 00 us 62 51 kH 2 53 dBm 8 25 Bm 93 40 ns 108 3 ns 16 00 us 62 49 kez 2 72 dBm 8 25 Bm 100 0 ns 106 9 ns 16 00 us 62 49 kHz 2 62 dBm 8 25 Bm 106 8 ns 96 94 ns 15 99 us 62 53 kHz 2 51 dim 8 25 dBm 109 6 ns 104 0 ns 16 00 us 62 52 kHr 2 52 dBm 8 25 dBm 108 6 ns 110 2 ns 16 00 us 62 51 kez 2 84 dBm 2 53 dBm 8 24 Bm 93 06 ns 108 4 ns 16 00 us 62 49 kHz 2 84 dBm 2 72 dBm 8 25 Bm 99 88 ns 107 1 ns 16 04 us 2 35 kt PLLLLLELLLEABBL ATA AA o lt Acg BW 10 24 MHz Acq Length 800 000 us RealTme Free Run Ref Int Atten 60 dB Displaying the Pulse Table 1 Press the Displays button or select Setup gt Displays Select PulsedRF in the Folders box Double click Pulse Table in the Available displays box to add the display to the Selected displays box RR Y N Click OK Selecting the Measurements to Take 1 With the Pulse Table selected press the Settings button 2 In the Pulse Table Settings control panel select the Measurements tab 42 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Pulse Trace Display Measurements params Method Points Show in Pulse Table Z Average ON Power v Peak Powe iv Average Transmtted P 3
47. 1 2 3 12 Select the Displays button or Setup gt Displays In the Select Displays dialog select General Signal Viewing in the Folders box In the Available displays box double click the Frequency vs Time icon or select the icon and click Add The Frequency vs Time icon will appear in the Selected displays box and will no longer appear under Available displays Click OK to display the Freq vs Time display SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Phase vs Time Display Elements of the Display Item Display element Description 1 Top of graph adjustment Use the knob to adjust the frequency range displayed on the vertical axis 2 Offset adjustment Adjusts the frequency shown at the center of the display 3 Autoscale button Adjusts the offset and range for both vertical and horizontal to provide the best display 4 Maximum and Minimum Displays the maximum and minimum values as well as when those values frequency readouts occur 5 Horizontal Scale Sets the time spanned by the graph 6 Clear button Restarts Average trace 7 Trace function Displays the current trace function setting Settings gt Trace gt Function Changing Frequency vs Time Display Settings see page 85 Phase vs Time Display The Phase vs Time display plots the signal phase against time The phase appears on the vertical axis while time is plotted along the horizontal axis
48. 155 Reference Topics Trace Tab RF I amp Q vs Time Trace Tab RF amp Q vs Time The Trace Tab allows you to set the characteristics of displayed traces amp Spa race Scale Prefs Trace I Trace v e Show Freeze gt Averages Function Average v 10 P Setting Description Trace Specifies the selected trace Show Specifies whether or not the selected trace is displayed Freeze Halts updates to the selected trace Function Selects the trace processing method Available settings are Normal Average Min Hold and Max Hold Averages Sets the number of traces averaged to generate the displayed trace visible only when Function is set to Average Save Trace As Saves the selected trace to a file for later recall and analysis Show Recalled Trace Displays a saved trace instead of a live trace Trace Processing Traces can be processed to display in different ways The Function setting controls trace processing Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting specif
49. 48 SCOPE Data iii A eects AS a emaewectacens 149 SCOPC S CHIN GS ii A A mtannioasn ads 149 Show Pulse Definition ERI 150 Spectrum Time Tab EH aa 150 Time MEASURE 150 Trace Tab Constellation Display 0 cece ccc e cee e eee een nr nr me eee emen 151 Trace Tab Frequency Vs Time 6 i0sccadccessacndadasenscecidesssavedassecstaeedsd ese EORR A Ae E TER 151 Trace Tab Spectrogram Display ssssssssssssesssssssee me ee eme ese mese eene 153 Trace Tab SPUELO S RM 155 Trace Tab RETL OY TIME di iia 156 Traces Tab CEDEN A O IS 158 Traces Tab Amplitude vs Time Display oooooococcoocccncconncnnnonnnonnnrnnnonrnrnn mee mene 159 Traces Tab Error vs Time Display 00 cee cece eee eee eee nen meme ee me ee mee 161 Traces Tab Math Trace ote vOv Ead ve kx ee ER ERAN Tex S OH I e bad ULNIS EOS Sq 162 Traces Tab Spectrum Display 0 ccc cece eee ee nen eme ese eme ese e eee 162 Units Tab 165 Ve ia A A ace 165 Glossary ACCUTANE 167 Liege 167 ACPR Measurement 1o eris Durex edo oro FORE E PRAE RA TRIER ERE E TON NOTER IEEE ATE AE QUERN SA DIR in 167 A E 167 Analysis dum 167 Analysis TM tica 167 ASR RR AN 168 Bd os 168 elici 168 ul 168 Carrier Frequency o ees ceste Et A baii 168 WI POINTE TI T 168 Carrier to Noise Ratio C N 25
50. 738 PM Detection Peax Function Average Setting O Freeze Save Trace AS Time Minutes Description Selected Line Displays the time at the Selected Line The selected line is the first line of the current acquisition If Markers are enabled the selected line is positioned by the selected marker Detection Function Sets the Detector method used for the trace Not available for saved traces Selects the trace processing method Available settings are Normal Average Max Hold and Min Hold Time Minutes Sets the period of time the spectrum trace is averaged to generate each line of the displayed spectrogram Freeze Halts updates to the selected trace Save Trace As Saves the selected trace to a file for later recall and analysis Show Recalled trace Displays a saved trace instead of a live trace Trace Processing Traces can be processed to display in different ways The Function setting controls trace processing SignalVu Vector Signal Analysis Software Printable Online Help 153 Reference Topics Trace Tab Spectrogram Display 154 Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value B Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and
51. AM Acronym for Quadrature Amplitude Modulation The process or result of a process in which the amplitude and phase of the carrier are varied concurrently by synthesizing two orthogonal ASK waves see ASK 176 SignalVu Vector Signal Analysis Software Printable Online Help Glossary Real Time Analysis Real Time Analysis Measurement technique based on triggering on an RF signal seamlessly capturing it into memory and analyzing it in the frequency time and modulation domains Real Time Bandwidth The frequency span over which real time seamless capture can be performed which is a function of the digitizer and the IF bandwidth of a Real Time Spectrum Analyzer Real Time Seamless Capture The ability to acquire and store an uninterrupted series of time domain samples that represent the behavior of an RF signal over a long period of time Reference Level The signal level represented by the uppermost graticule line of the analyzer display Residual FM Incidental FM Short term displayed frequency instability or jitter due to instability in the analyzer local oscillators Given in terms of peak to peak frequency deviation and expressed in hertz or percent of the displayed frequency Residual Response A spurious response in the absence of an input signal Noise and zero pip are excluded RBW The RBW determines how well the analyzer can resolve or separate two or more closely spaced signal components SignalVu Vector S
52. Define Markers to display the Define Markers control panel 2 Select the Define Peaks tab 3 To define the level for Peak Threshold enter a value in the Peak Threshold number entry box SignalVu Vector Signal Analysis Software Printable Online Help 45 Taking Measurements Using Markers 4 To define the amount the trace must dip enter a value in the Peak Excursion number entry box 5 Click the close button to remove the Define Markers control panel Using Markers 46 Markers are indicators in the display that you can position on a trace to measure values for the X and Y axes such as frequency power and time A Marker always displays its position and if enabled will display the difference between its position and that of the Marker Reference MR You can display up to five markers including the marker reference Markers can all be placed on the same trace or they can be placed on different traces There are two types of Markers Reference and Delta Markers The Marker Reference labeled MR in the graph makes absolute measurements and is also used for calculating differences when Delta readouts are enabled The Delta Markers labeled M1 to M4 in the graph are used to measure other points on the trace or the difference between the Marker Reference and the Delta marker Measuring Frequency and Power To measure the frequency and power at a point on a Spectrum trace 1 Select Markers gt Define Markers 2 Select the Marker Pro
53. Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Min Hold Displays the minimum value in the trace record since the acquisition began Each new trace display point is compared to the previous minimum value and the lesser value is retained for display and subsequent comparisons Saving Traces To save a trace for later analysis 1 Select the Save Trace As button This displays the Save As dialog box O Screen Captures Name Si Mpesa 1 48240Ger 1 dox 3 descoo 2 ys lt a Fie name My Network Save as type Saved Trace Fies 2 Typea name for the saved trace and click Save Recalling Traces You can recall a previously saved trace for analysis First specify a trace for recall and second enable Show Recalled Trace SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Trace Tab Spectrogram Display To display a previously saved trace 1 Click the button to display the Open dialog box Show recalled trace Uv e A J Navigate to the location of the saved trace Select the desired trace and click Open Check the Show Recalled Trace checkbox Verify that the Show checkbox is selected Trace Tab Spectrogram Display The Traces Tab allows you to set the display characteristics of displayed traces Freq amp Span BY Tr Selected Line 03 10 26 063
54. ElShow PeakNommal cen 1 00 dam LP Vertical scale RN controls and 90 eue other e measurement controls and readouts 101 00 dem Autoscale Eta HOS Go Horizontal scale controls artes Marker toolbar Status bar Measurements area Specific elements of the display are shown in the following figure Elements of the Display 54 SignalVu Vector Signal Analysis Software Printable Online Help Reference Elements of the Display ul Elle View farkers Setup Tools Window Markers Settings Acq Ana Freq 91 50 MHz RefLev 0 01 dBm Trace 1 iv 5how Peak Normal Run Hel ds 100 01 dBm s CF 91 50 MHz 2 Span 10 40 MHz Analyzing Acq Bw 10 40 MHz Acq Length 22 323 us Real Time Scope sample rate 25 000 GHz 0225 001 SignalVu Vector Signal Analysis Software Printable Online Help 55 Reference Data File Formats Ref Setting Description number 1 Displays Opens the Select Displays dialog box so that you can select measurement displays 2 Markers Opens or closes the Marker toolbar at the bottom of the window 3 Settings Opens the Settings control panel for the selected display Each display has its own control panel 4 Acquire Opens the Acquire control panel so that you can define the acquisition settings 5 Analysis Opens the Analysis control panel so that you can define the analysis settings such as frequency analysis time and units
55. Help 37 Taking Measurements 38 Spurious Display Item Display element Description 1 dB div Sets the vertical scale value The maximum value is 20 00 dB division 2 Vert Position Sets the top of graph value This is only a visual control for panning the graph The Reference Level is adjusted in the Toolbar and the Ampl control panel By default Vert Position Ref Level 3 Check Mark Indicator Indicates the display for which the acquisition hardware is optimized 4 Pass Fail readout Indicates whether one or more spurs have exceeded a limit specified on the Settings gt Limits tab 5 Ref If enabled displays the power reference level 6 Trace function Indicates the trace processing method If Average or Max Hold is selected this readout displays the number of traces being processed averaged or compared for the Max Hold value 7 Clear Restarts multi trace functions Average Max Hold 8 Stop Adjusts the graph stop frequency This setting affects only visual scaling not measurement parameters 9 Green bar Indicates the range that is selected on the Settings gt Ranges and Settings gt Limits tabs 10 Spur table Displays spur measurements See the following table for details 11 Start Adjusts the graph start frequency This setting affects only visual scaling not measurement parameters 12 Autoscale Adjusts the Vertical and Horizontal scaling to display the entire trace on screen Selects
56. Menu 73 violation 180 W Window Menu 79 Windows Event Viewer 110 X x dB BW Ref Power 34 x dB Level 127 SignalVu Vector Signal Analysis Software Printable Online Help
57. Note that the trace s in the Phase vs Time display can be set to a maximum of 100 000 points however the actual number of trace points can extend up to 1 000 000 points 1f Max trace points is set to Never Decimate If the Analysis Length includes more than the selected Max trace points value the trace is decimated using the method specified with the Detection control to be equal to or less than the Max trace points setting except when Max trace points is set to Never Decimate This decimated or undecimated trace is what is used for marker measurements and for results export You can set the Max trace points on the Settings gt Prefs tab SignalVu Vector Signal Analysis Software Printable Online Help 13 Taking Measurements Phase vs Time Display To display Phase vs Time 1 Press the Displays button or select Setup gt Displays 2 In the Select Displays dialog select General Signal Viewing in the Folders box 3 In the Available displays box double click the Phase vs Time icon or select the icon and click Add The Phase vs Time icon will appear in the Selected displays box and will no longer appear under Available displays 4 Click OK to show the Phase vs Time display Elements of the Display Tek RSA61004 Phase vs Timo fe fe Il p Took fndow Help EE Freq 1 00000 GHz RefLev 0 00 dim Amp Replay Run Normal cna Item Display element Description 1 Top of graph adju
58. ON Power Pulsed RF Displays 0 csse mme eme eene 98 BW Tab EET eked chu 98 BW Tab Amplitude vs Time Display 0 0 0 ccc cece eee ener nnn e meme mene 100 Carrier Feedthrough Measurement sss he he e ese ness 100 CCDF Complimentary Cumulative Distribution Function esee 100 Channels Tab ACPR C oer e ERA uo e ERE E HV 101 Channels Tab MCPR dert e oA is 102 Channel Powers jie eee eret A Re e HR E Ea odes EUH ete eges 104 Common Information Messages ooooocccccconoconncnnocon non nn cnn e esse e esse ehe ehe hes nnns 105 Data Properties 15e IET tete ea RARE EORR e ete gt d ciu CT ns rin piste aad 106 Define Tab Search ree oerte e Regie un VR e T Peu qud a eR 106 Define Tab Pulsed RE cee oid cess idee ee REM ERE RE v glow Gan RR EE E eU I S ERR FUE 110 Displaying the Windows Event Viewer 0 ccc cee cen ene me ese e eee eene 110 Droop Measurement Pulsed RF Display sess e eee mee 112 Duty Factor Measurement Pulsed RF nesnese sesers nn eee mee 112 Duty Factor Ratio Measurement Pulsed RF sss eee mee 112 EVM Error Vector Magnitude MeasureMenNt ooooocoocconcocnncnnconnncnnccnn nc ee eee ese eene 113 Fall Time Measurement Pulsed RF Display 0 0 0 ccc cece cece ee cee mee 113 Find Tab GP Digital Modulation 0 ccc cece cece eee enn eme e e eme ee mene enne 113 Freq amp RBW Tab RF Measurements 0 ccc cec
59. Pulse Statistics display Offset Adjusts the Reference Level away from the top of the trace display The units for this setting depend on the statistic selected from the Result drop down list in the Pulse Statistics display Rescale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Number of pulses Specifies the number of pulses to use to calculate statistical values First pulse to show Sets the first pulse to display The first pulse after the start of acquisition whether free run or triggered is considered Pulse0 It is the first pulse after the global time reference Rescale Resets the scale of the horizontal axis to contain the complete trace Plot Specifies either the FFT or Trend plot Reset Scale Restores all settings to their default values Scale Tab Pulse Trace The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency SignalVu Vector Signal Analysis Software Printable Online Help 143 Reference Topics Params Method Ponts Scale 95 00 dBr Scale Tab RF I amp Q vs Time Full scale Offset 93 00 dBm Offset 151 696 Seectec pune Max pulse Autoscale Autoscale Setting Description Vertical Controls the vertical position and sca
60. SignalVu Vector Signal Analysis Software Printable Online Help DELE DEDE TT AO Tektronix 077 0225 00 Y SignalVu Vector Signal Analysis Software Printable Online Help www tektronix com Tektronix 077 0225 00 Y Copyright O Tektronix All rights reserved Licensed software products are owned by Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and international treaty provisions Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc Compiled Help part number 076 0177 00 Help version 1 01 Contacting Tektronix Tektronix Inc 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA For product information sales service and technical support n North America call 1 800 833 9200 Worldwide visit www tektronix com to find contacts in your area Table of Contents Table of Contents Welcome Welcome ach cuss DIEI 1 About Your Instrument Iunnirodb ose 3 Product SOf wWale tenian AA be ee Doe VO Ep MIN UM EIER ITO ERN 3 Options e DIM 4 Documentation and Support Documentation ooocconcnnnnc nn 4 Connecting Signals Connecting Signals and Selecting the Analysis Chamnel ooooccccccnccnccnc
61. Specifies the number of adjacent channel pairs Range 1 50 Resolution 1 Channel Bandwidth Specifies the frequency width of each channel all channels share the same value Channel Spacing Specifies the difference in frequency between the centers of each channel The following figure illustrates the settings controlled from the Channels tab Lower Lower Upper Upper Adjacent 2 Adjacent 1 Main Adjacent 1 Adjacent 2 Adj Chan Adj Chan Main Chan Adj Chan Adj Chan Bandwidth Bandwidth Bandwidth Bandwidth Bandwidth Se ap A SAA Channel Spacing Channel Spacing Channel Spacing Channel Spacing JM u Ju Changing the Number of Adjacent Pairs 1 Select Number of adjacent pairs number entry box 2 Enter a value for the number of adjacent pairs using the knob or the keypad SignalVu Vector Signal Analysis Software Printable Online Help 101 Reference Topics Channels Tab MCPR NOTE As you change the value for the number of adjacent pairs the analyzer will update the spectrum display to identify the adjacent channels 3 Select the Close box when you have finished making changes Changing the Channel Bandwidth 1 Select the Channel Bandwidth number entry box 2 Enter a value for the number of adjacent pairs using the knob or the keypad NOTE As you change the value for the number
62. T 78 Tools Menu TOOS Mei UD 78 Options Settings ai niar a cias 78 Window Menu Window M n irren eaves nade A peed ber ea bine E Enas 79 Help Menu Help Me aaa 79 Changing Settings o O RN 80 Acquire Control Panel reete t ETE A MI ia 81 Amplitude vs Time Display Settings 0 0 c ccc cece cece eee e eee ee ee nee meme me nene 82 Analysis Settings ci di 82 CCDF Display Settings bits a A oe Ade des E ES e OE eens 83 Channel Power and ACPR Settings sss ese eme messe hene nnne 83 Constellation Display Settings ccc cece cece cere ee me eme messe eese 84 EVM vs Time Display Settings oocooccoocconnonnnconconnnccnnononnon cnn nn ee messe e he eere 84 Frequency Vs Lime Settings cessere etre eR rende ee Re ERN ee Ead qus vr YR IRE e eed dut etu 85 Magnitude Error vs Time Settings ooooooocconcoonnconccnnncon non eee eee eee eee ene sent nett eee nee nae 85 MCPR Display Settings 6 0 cesancaentendcasauevececaaenscdeqeddaeeentedeeastuedscesssevasdecdsnscanas 86 Occupied Bandwidth Display Settings csse nennen 86 Phase Error vs Time Settings meca ici 87 Phase vs Time Display Settings 00 cece cece cee ene een nncnnnonnnc nn nr rn e mene eese 87 Pulse Statistics Display Settings 2 0 0 0 00 cece cece cece eee eee nro nn ene ents e mense eene 88 Pulse Table Display Settings sss me emen emere eese 88 Pulse Trace Display Settings c ccccccceesc
63. This data was acquired when the input signal contained peaks greater than 6 dB above the Reference Level setting If the data is from a file this error cannot be cleared Data from unaligned instrument The acquisition data was captured when the instrument was not aligned This message refers to the acquisition data currently being analyzed but not necessarily to the current status of the instrument Measurements made on this data might not be accurate Data from uncalibrated instrument The acquisition data was captured when the instrument was not calibrated This message refers to the acquisition data currently being analyzed but not necessarily to the current status of the instrument If this data is from a file the error cannot be cleared Data acquired with 3 GHz preamp This is a warning that signals above 3 GHz are likely to be severely attenuated because the Preamp was on when the data was acquired The optional Preamp is not specified for operation above 3 GHz Disabled data is from swept acquisition The display needs to run in real time mode The display associated with this message cannot run now because it is not the selected display and the selected display is performing multiple acquisitions it is in swept mode Change the settings of the selected display so it is performing real time acquisitions B Select the associated display to make it the selected display When it 1s selected it will force the acquisition p
64. Time Trace 5 lt Prefs Vertica Honzonta Scale 1 00 Scale 0 00 Sym Offset 0 000 Offset 0 00 Sym Autoscale Autoscale SignalVu Vector Signal Analysis Software Printable Online Help 141 Reference Topics Scale Tab Phase vs Time Setting Description Vertical Controls the vertical position and scale of the trace display Scale Sets the scale of the vertical axis Units are in degrees Offset Sets the start value for the vertical axis Units are in degrees Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Sets the horizontal scaling in symbols or second units are set on the Analysis Time tab Offset Sets the start value for the time axis Autoscale Resets the scale of the horizontal axis to contain the complete trace Scale Tab Phase vs Time The Scale tab for the Phase vs Time view allows you to change the vertical and horizontal scale settings For the Phase vs Time view the vertical axis represents the phase and the horizontal axis represents time Freq amp Span Trace f Scale Prefs Vertical Honzonta Scale 102 Y als Scale 1 250 us ModubP v Offset 38 Y Reference Offset 0 000 s Setting Description Vertical Controls the vertical position and scale of the trace display Scale Sets the range of the vertical axis Units are in degrees Offset S
65. a mouse to move the marker to the desired location on the trace You can also click on the marker location textbox in the Markers toolbar at the bottom of the screen and adjust it with your mouse wheel The Peak button in the Markers toolbar and the arrow buttons to the right of it control marker peak searching on the trace 8 Read the frequency and power level of the marker position on the display 9 Read the signal density frequency and power level of the marker position on the display The following table shows the appearance of the three types of marker readouts Marker Reference Readout Absolute Marker Readout Delta Marker Readout Reference Marker label Absolute Marker label Delta Marker label Power level at marker Power level at marker Difference in power level between Delta Marker and Marker Reference Frequency at marker Frequency at marker Difference in frequency between Delta Marker and Marker Reference The following table shows the appearance of the marker indicators as they appear on the trace SignalVu Vector Signal Analysis Software Printable Online Help 4T Taking Measurements Using Markers in Noise Mode Marker Reference Absolute Marker Delta Marker MR M1 n n Controlling Markers with the Touchscreen Actions Menu In addition to controlling the marker actions from the front panel or screen menu items you can use the touch screen actions menu to move markers or add and delete markers Ko S
66. a signal typically in order to transmit information Modulating Signal The signal which modulates a carrier The signal which varies or regulates some characteristic of another signal Modulation The process of varying some characteristic of a signal with a second signal Noise Unwanted random disturbances superimposed on a signal which tend to obscure it Noise Bandwidth NBW The exact bandwidth of a filter that is used to calculate the absolute power in dBm Hz Noise Floor The noise intrinsic to a system that represents the minimum limit at which input signals can be observed ultimately limited by thermal noise kTB The analyzer noise floor appears as a grassy baseline in the display even when no signal is present SignalVu Vector Signal Analysis Software Printable Online Help 175 Glossary Occupied Bandwidth Occupied Bandwidth Bandwidth within which 99 of the power transmitted on a single channel lies Open Recall Bring data into the application from a file of application native format OQPSK Acronym for Offset QPSK Quadrature Phase Shift Keying PM Acronym for Phase Modulation Primary Marker The marker displayed in the Single Marker mode whose frequency and or position is changed when tuning with the general purpose knob PSK Acronym for Phase Shift Keying The process or result of a process in which the carrier phase is varied discretely in accordance with a digital code Q
67. ab Frequency vs Time The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency 140 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Scale Tab Phase Error vs Time Freq amp Span Trace e Pre Vertica Hortonta Scale 10 0 Hz Scale 200 000 us Offset 0 000 Hz Offset 40 625 us Setting Description Vertical Controls the vertical position and scale of the trace display Scale Sets the scale of the vertical axis Offset Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Allows you to in effect change the span Offset Allows you to pan a zoomed trace without changing the Measurement Frequency Offset is only enabled when the span as specified by Freq div is less than the acquisition bandwidth Autoscale Resets the scale of the horizontal axis to contain the complete trace Scale Tab Phase Error vs Time The Scale tab view allows you to change the vertical and horizontal scale settings For the Phase vs Time view the vertical axis represents the phase and the horizontal axis represents time Modulation Advanced Params Find Analyss
68. ab is displayed Show Shows hides the selected trace Freeze Halts updates to the selected trace Save Trace As Saves the selected trace to a file for later recall and analysis Trace minus Trace Selects which traces serve as Trace A and Trace B Traces Tab Spectrum Display The Traces Tab allows you to set the display characteristics of displayed traces 162 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Traces Tab Spectrum Display Freg amp Span BY races Scale Prefs Trace Trace 1 v v Show O Freeze Save Trace As Detection Pesk v Show recalled trace Function Norra v Setting Description Trace Selects a trace Show Shows hides the selected trace Detection Sets the Detection method used for the trace Not available for saved traces Function Selects the trace processing method Available settings are Normal Average Max Hold and Min Hold Number of Traces Sets the number of traces averaged to generate the displayed trace Present only when Function is set to Average Freeze Halts updates to the selected trace Save Trace As Saves the selected trace to a file for later recall and analysis Show Recalled trace Displays a saved trace instead of a live trace Trace Available traces are Trace 1 Trace 2 Trace 3 Math and Spectrogram Traces 1 3 are based on the input signal and enable you to display the input signal using different processing Fo
69. acity The maximum period of time and number of samples that can be acquired with the current sampling parameters Using The total amount of acquisition memory that will be used based on the current settings Levels Tab Use the Levels tab to set parameters that control the method and levels used to calculate some pulse values 118 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Limits Tab Spurious Display Params Define Leves Freq Estimation Scale Prefs 100 Leve 50 Leve Rise Fal Level 4 100 Pulse Average f T Both Amplitude j Voltage 10 90 100 100 Independent adjut Ree e 2 for de us Fal Power 20 80 Setting Description 100 Level Specifies the method used to determine the 100 level s 50 Level Specifies the method used to determine the 50 level on the pulse Rise Fall Levels Select whether to use the 10 to 90 or 20 to 80 points based on voltage level to define the rise and fall times 100 Level Use the 100 Level settings to select the method used to determine the 100 level s used for calculating pulse parameters for example Rise Fall and Width The Pulse Average Amplitude defines the pulse top as the average of the values of all the points along the pulse top This average is used as the 100 level from which the 10 20 50 80 and 90 levels are calculated Pulse measurements are referenced against these various levels
70. additional parameters can be set Normally the best results are achieved by leaving the Adjust control set to All Auto a Vertical IQ Sampling Parameters Scope Settings Scope Data Auto All Auto recommende 24 4 MSamples s 41 0 nsec Sample Acq BW Capacity 4 999 ms Acq Length 122 kSamples Samples Using 84 664 us 2 07 kSamples 1 7 of capacity Sampling Control There are three acquisition parameters that interact with each other acquisition bandwidth oscilloscope acquisition sampling rate and memory usage The oscilloscope s sampling rate 1s displayed in the status bar at the bottom of the SignalVu window This sample rate is decimated by the SignalVu software to meet the requirements of the current measurement settings such as the selected span acquisition bandwidth or resolution bandwidth of a measurement The resulting decimated sample rate 1s shown in the figure above 24 4 MSamples sec This is the sample rate of the IQ data analyzed and acquisition data file stored by SignalVu Adjust User Sets Analyzer Calculates All Auto N A N A All values based on the selected measurement Acq BW Acq Samples Acq BW Acq Samples Acq Length Acq BW Acq Length Acq BW Acquisition Length Acq Samples Acquisition Memory Usage The center portion of the tab shows how the acquisition memory is used Readout Description Samples s sec Sample Readout of the acquisition sample rate and sample period Cap
71. ains parameters that define the portion of the acquisition record that is used for analysis Analysis Analyses Tre Spectrum Time Frequency Unts Analysis Offset 0 000 s IM Auto Time Zero Reference Acqustion Stat Analysis Length 7 425 us V Auto Actual 7 425 us Setting Description Analysis Offset Specifies the location of the first time sample to use in measurements Auto When enabled causes the instrument to set the Analysis Offset value based on the requirements of the selected display Analysis Length Specifies the length of time to use in measurements Auto When enabled causes the instrument to set the Analysis Length value based on the requirements of the selected display Time Zero Reference Specifies the zero point for the analysis time Actual This is a displayed value not a setting It is the Analysis Length time being used by the analyzer this value may not match the Analysis Length requested in manual mode Analysis Offset Use analysis offset to specify where measurements begin Range 0 to end of acquisition Analysis Length Resolution 1 effective sample or symbol Analysis Length Use the analysis length to specify how long a period of time is analyzed by a measurement After you enter a value this box changes to show the actual value in use which is constrained by Acquisition Time This setting is not available when Auto is checked Range minimum value depends on modulation typ
72. allows you to set the display characteristics of the trace Freq amp Span Trace Scale Prefs v Show OD Freeze Save Trace As r Averages Function Average v 10 Setting Description Show Shows hides the trace Function Selects the trace processing method Available settings are Normal Average Min Hold and Max Hold Averages Sets the number of traces averaged to generate the displayed trace Freeze Halts updates to the trace Save Trace As Saves the selected trace to a file for later recall and analysis Show Recalled trace Displays a saved trace instead of a live trace SignalVu Vector Signal Analysis Software Printable Online Help 151 Reference Topics Trace Tab Frequency vs Time 152 Trace Processing Traces can be processed to display in different ways The Function setting controls trace processing Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting specifies how many traces averaged Max Hold Displays the maximum value in the trace record since the acquisition began
73. alue for frequency offset here If Auto is enabled this readout displays the calculated frequency offset Chirp BW If Auto is not enabled specify the value for Chirp BW here If Auto is enabled this readout displays the calculated Chirp BW This setting is used only when the modulation type is set to Linear Chirp Modulation Type Frequency estimation is performed by the instrument using selectable methods depending on signal type The selections for modulation type are CW constant phase CW changing phase Linear Chirp and Other Select the method of frequency method based upon a best match to your signal based on the following descriptions CW constant phase The signal is not designed to change in either frequency or phase during the measured pulse train CW changing phase The signal does not change the carrier phase within each pulse although it could change the phase from one pulse to another pulse The signal is not designed to make frequency changes m Linear Chirp The signal changes frequency in a linear manner during each pulse The signal has the same carrier phase at the same time offset from the rising edge of the pulse B Other The signal is not one of the listed types You must manually enter the Frequency Offset value The following table maps the appropriate signal type selection with the signal characteristics Signature Phase offset from one pulse to another Zero Any unknown CW CW C
74. alue is 20 00 dB division 3 RBW Sets the resolution bandwidth Note that when the RBW is set to Auto its value is italicized 4 VBW Enables the VBW Video Bandwidth filter See Setup gt Settings gt BW tab see page 98 5 Autoscale Adjusts the Vertical and Horizontal scaling to display the entire trace on screen 6 Position Default function is CF center frequency equivalent to the Freq setting If Horizontal scaling has been manually adjusted in Settings gt Scale then Offset will replace CF as the setting at the bottom left corner of the screen 7 Span Scale Default function is Span frequency difference between the left edge of the display and the right edge If Horizontal scaling has been manually adjusted in Settings gt Scale then Scale will replace Span as the setting at the bottom right corner of the screen 8 Clear Restarts multi trace functions Avg Hold 9 Function Readout of the Detection and Function selections for the selected trace 10 Show Controls whether the selected Trace is visible or not When trace is Off the box is not checked 11 Trace Selects a trace Touching here pops up a context menu listing the available traces whether they are enabled or not If user selects a trace that is not currently enabled it will be made enabled Touchscreen Actions On Markers in the Graph Area Action Description Mouse click within 1 2 div of Selects the marker and updates the marker
75. alysis period to 5 ms The Spectrum Span is 40 MHz The RBW automatically selected for this Span is 300 kHz For a 300 kHz RBW the amount of data needed for a single spectrum transform is 7 46 us A 5 ms Analysis Length yields 671 individual spectrum transforms each one forming one trace for the Spectrogram to display as horizontal colored lines This preset scales the Spectrogram time axis vertical axis to 2 which means that the Spectrogram has done two levels of time compression resulting in one visible line for each four transforms This results in 167 lines in the Spectrogram for each acquisition each covering 29 84 ps Creating Application Presets You can add your own application presets to the list that appears in the Application Presets dialog Create a Setup file and save a copy of it to C SignalVu Files Application Presets The name you give the file will be shown in the Application Presets list along with the sets provided by Tektronix For instructions on how to save a Setup file see Saving Data see page 9 If the Tektronix application presets files are accidentally deleted you can restore them by reinstalling the SignalVu software The software installation process will not remove user files you have placed in the Application Presets directory Preset Menu Bar File gt Preset 72 SignalVu Vector Signal Analysis Software Printable Online Help Reference View Menu Preset resets settings and clears all acquisition d
76. andwidth Like the main instrument Preset command and the other application presets the Pulse Analysis application preset also sets most other instrument controls to default values Analysis Period This set to 2 ms to ensure a good probability of catching several pulses for typical signals To use the Pulse Analysis preset 1 Select File gt Application Presets gt Pulse Analysis Click OK 2 Setthe Center Frequency control to the carrier frequency of your pulsed signal 3 Setthe Reference Level to place the peak of the pulse signal approximately 0 10 dB down from the top of the Time Overview display You may need to trigger on the signal to get a more stable display This is set up with the oscilloscope s controls A rising edge trigger works well for many pulsed signals 4 Setthe Analysis Period to cover the number of pulses in your signal that you want to analyze To do this click in the data entry field of the Time Overview window and set the analysis length as needed Time Frequency Analysis The Time Frequency Analysis application preset opens the following displays E Time Overview Shows a time domain view of the analysis time window B Spectrogram Shows a three dimensional view of the signal where the X axis represents frequency the Y axis represents time and color represents amplitude SignalVu Vector Signal Analysis Software Printable Online Help 71 Reference Preset Frequency vs Time This display s
77. arameters to change to meet its own needs Needs swept acq or larger AcqBW Acquire data while display is selected The display is not running because it needs to perform multiple acquisitions it must be in swept mode but it is not the selected display Only the selected display can perform multiple acquisitions Select the display showing this message to give it control of acquisitions parameters Sometimes only one display can work and the others will be blank and show errors This happens when different displays have conflicting demands on the acquisition data record Export failure file not saved An error occurred while exporting Results The file was not created m Export the results again Export failure unable to open results file for export File not saved The Export Results file could not be opened for writing so the export of results was not completed m Verify that there is sufficient free space on hard disk Insufficient data for CISPR Acquire while display is selected SignalVu Vector Signal Analysis Software Printable Online Help Reference Error and Information Messages This message appears when a measurement is not the selected measurement and CISPR filters are selected Set the measurement to be the selected measurement and reacquire the signal IQ Processing Error 8012 This message occurs in GP Digital Modulation displays The most likely cause for this message is that there are not enough symbols to ana
78. ase deviation is the difference between the maximum and minimum Phase values measured during the ON time of a pulse Phase Error Measurement The RMS phase difference between the measured signal and the ideal reference signal Prefs Tab The Prefs tab enables you to change parameters of the measurement display The parameters available on the Prefs tab vary depending on the selected display but include such items as enabling disabling Marker Readout switching the Graticule display on off and Marker Noise mode Some parameters appear with most displays while others appear with only one display Freq amp Span Trace Scale Prefs Graticule 9 On Max trace points 100K v Oof v Show Marker readout in graph selected marker Prefs Tab Spectrum The Prefs tab enables you to change appearance characteristics of the Spectrum display Freq amp Span BW Traces Scale Prefs v Show trace legend Trace points 801 MI v Show graticule v Show Marker readout in graph selected marker 7 Marker Noise mode Requires dBm Ampl units and Average trace detect 130 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Setting Prefs Tab Spurious Description Show trace legend Enables display of a legend in the measurements area that shows the Detection method and Function setting for displayed traces The color of the legend text matches the color of the as
79. asurements are displayed in dB relative to the Main channel Avg Channel Power Main The power measured for the Main channel The detection type used for measuring channel power and adjacent channel powers is Average This means that the average of the linear pre log samples is used to determine the power The Main channel power is displayed in dBm Setting ACPR Measurement Parameters see page 122 SignalVu Vector Signal Analysis Software Printable Online Help 31 Taking Measurements MCPR Multiple Carrier Power Ratio Display MCPR Multiple Carrier Power Ratio Display Use the MCPR measurement to measure adjacent channel power ratio for multiple main channels or when adjacent channels have different offsets and or bandwidths The MCPR display show the Reference Power and the ratio of each adjacent channel to the Reference Power You can select whether the Reference Power is the total of all active channels or a single channel Measuring Multiple Carrier Power Ratio 1 Press the front panel Displays button 2 From the Select Displays window select RF Measurements from the Folders box 3 Double click the MCPR icon in the Available displays box Click OK to complete your selection 4 Press the front panel Freq button and use the front panel keypad or knob to adjust the frequency to that of the main channel Select Meas Freq to set the measurement frequency Use the front panel knob to adjust the frequency 5 Press the S
80. at a time Use the Vertical tab to specify which oscilloscope channel is used for analysis by the SignalVu software Vertical 1Q Sampling Parameters Scope Settings Scope Data Chamel CH1 w Ref Level 0 00 dBm Coupling DC Ti tion Bandwidth 8 000 GHz O SignalVu Vector Signal Analysis Software Printable Online Help 165 Reference Topics 166 Vertical Setting Description Channel Specifies the oscilloscope channel used for analysis Ref Level Specifies the Reference Level which determines the oscilloscope s Vertical Scale setting If Vertical settings are not enabled in the Scope Settings tab or while analyzing a recalled data file the Reference Level control only adjusts vertical display position Coupling Display of the coupling setting on the selected channel Bandwidth Display of the oscilloscope bandwidth setting Termination Display of the termination setting for the selected channel SignalVu Vector Signal Analysis Software Printable Online Help Glossary Accuracy Accuracy The closeness of the indicated value to the true value ACLR Adjacent Channel Leakage power Ratio is the ratio of the RRC Root Raised Cosine filtered mean power centered on the assigned channel frequency to the RRC filtered mean power centered on an adjacent frequency defined in 3GPP ACPR Measurement Adjacent Channel Power Ratio ACPR is the ratio of the mean power centered on the assigned channel frequency
81. ata Settings and acquisition data that have not been saved will be lost After Preset resets the analyzer settings 1t displays the Spectrum view Preset does not affect time or date settings the Windows XP operating system settings or Tools Menu Items View Menu The View menu enables you to control the display of items in the application window Command Description Full Screen see page 73 Toggles all views between full screen size and user selected size Marker Toolbar see page 73 Shows or hides the Marker toolbar Enables you to define Markers and perform Peak searches Status Bar see page 74 Shows or hides the Status bar Full Screen Menu Bar View gt Full Screen When unchecked clicking Full Screen resizes the application window to fill the screen Full Screen mode maximizes the application window and turns off the application title bar When checked clicking Full Screen restores the application window to its previous size The application title bar is restored Marker Toolbar Application toolbar Markers Menu bar View gt Marker Toolbar Select Marker Toolbar to display or hide the Marker Toolbar in the application window The Marker Toolbar enables you to operate existing markers or define new markers Markers v MR Frequency 1 4875 GHz To center Peak e x SignalVu Vector Signal Analysis Software Printable Online Help 73 Reference Status Bar Ic
82. averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting specifies how many traces averaged m Max Hold Displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Min Hold Displays the minimum value in the trace record for each display point Each new trace display point is compared to the previous minimum value and the lesser value is retained for display and subsequent comparisons Saving Traces To save a trace for later analysis 1 Select the Save Trace As button This displays the Save As dialog box Saven gt Screen Captures O tame fjMutpesk 1 2320G 1_1 dox Recert 2 Typea name for the saved trace and click Save Recalling Trace You can recall a previously saved trace for analysis First specify a trace for recall and second enable Show Recalled Trace To recall a previously saved trace 1 Click the button to display the Open dialog box SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Trace Tab Spurious Show recalled trace J 2 Navigate to the location of the saved spectrogram trace 3 Select the desired trace and click Open 4 Check the Show Recalled Trace checkbox Trace Tab Spurious Use the Trace ta
83. b to select the trace function or freeze the displayed trace Parameters Reference Ranges Limts Trace Scale Prefs D Freeze Function Norme v Setting Description Function Selects the trace processing method Available settings are Normal Average and Max Hold Freeze Halts updating of the trace in the display Trace processing continues but the displayed trace is not updated Trace Processing Traces can be processed to display in different ways The Function setting controls trace processing E Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value m Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting the box with the number in it specifies how many traces averaged m Max Hold Displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum values and the greater value is retained for display The Number of Traces setting the box with the number in it specifies how many traces are compared to determine the Max Hold value SignalVu Vector Signal Analysis Software Printable Online Help
84. bability that the signal will be at or above the average signal level 2 Power level select Adjust to display the value of the CCDF curve at a specific power level The selected power level is indicated by a small triangle on the CCDF curve 3 CCDF value Readout of the value of the CCDF curve at the selected power level 4 Avg Readout of the Average power level and the CCDF value at the Average power level 5 Readout Table Readout of the CCDF curve at six points 6 Pk Avg Readout of the Peak to Average power ratio 7 Measurement time Readout of the length of time used for the measurement Displays s when the Measurement time is set to continuous Changing the CCDF Display Settings see page 83 Channel Power and ACPR Adjacent Channel Power Ratio Display Use the Channel Power and ACPR measurement to measure channel power by itself or adjacent channel leakage ratio with one main channel SignalVu Vector Signal Analysis Software Printable Online Help 29 Taking Measurements Channel Power and ACPR Adjacent Channel Power Ratio Display Tek RSA61004 Channel Power and ACPR EE File View Run Markers Setup Took Window Heb x Displays Markers Setungs I Trig JLaea Jl Ana freq 100000 GHz RefLev 0 00 dBm ama Replay Run ly c um g 7 Normal Clear 0 00 dam dafdw 10 00 dB 100 00 dBm autoscae gt Offset 1 00000 GHz gt Scale 34 60 MHz nee Avg Channel Ch Offse
85. be sorted by range Clicking a second time on the same heading reverses the order Changing the Spurious Display Settings see page 91 Pulse Statistics Display The Pulse Statistics display shows measurement statistics for RF pulses The Pulse Statistics view displays a plot of a pulse measurement s values for every pulse in the analysis period For example the Pulse Statistics display will show the rise time measurement for each of 30 pulses with rise time on the Y axis and pulse number on the X axis Alternately the Statistics Display can show an FFT trace for the values of a measurement over all the pulses analyzed 40 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Elements of the Pulse Statistics Display ae J seetres Trg J Aca Jh Ana J Freq 1 46879 GHz RefLev 0 00 diim s ren Pulse Table Display Item Display element Description 1 Optimized indicator The check mark indicator in the upper left hand corner of the display shows when the Pulse Statistics display is the optimized display 2 Result Use this list to select which measurement statistics to display The measurement chosen here selects the same result to be displayed in the Pulse Trace display and the Pulse Table display Selecting a result in any of these views causes the same result to be selected in all of them 3 Pulse Selects which pulse result is shown Like the Result this selection i
86. cells indicate the location of markers The selected Marker is highlighted with a light green background All other markers are highlighted with a light gray background In the Symbol Table the marker readout below the table shows the marker location in time symbol numbers and symbol value Changing the Symbol Table Display Settings see page 92 CCDF Display 28 The CCDF Complementary Cumulative Distribution Function is a statistical characterization that plots power level on the x axis and probability on the y axis of a graph Each point on the CCDF curve shows what percentage of time a signal spends at or above a given power level The power level is expressed in dB relative to the average signal power level The CCDF Display also shows the Average power level and the Peak Average ratio To show the CCDF display 1 Press the Displays button or select Setup gt Displays This shows the Select Displays dialog SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Channel Power and ACPR Adjacent Channel Power Ratio Display 2 From the Folders box select RF Measurements 3 Double click the CCDF icon in the Available Displays box This adds the CCDF icon to the Selected displays box 4 Click the OK button Elements of the CCDF Display ac na Freq 1 459240 GHz X TTE C3 Item Display element Description 1 100 The top of the graph represents the 100 pro
87. ck the Close button to remove the control panel Move the markers to the desired locations on the trace Read the frequency and power level for the selected marker in the upper corners of the display To display the delta measurement in dBc Hz select the delta marker M1 M2 M3 or M4 by clicking on it or by selecting it in the drop down marker list in the Markers toolbar SignalVu Vector Signal Analysis Software Printable Online Help 49 Taking Measurements Using Markers in Noise Mode 50 SignalVu Vector Signal Analysis Software Printable Online Help Reference Touch screen Actions Touch screen Actions You can use the touch screen to change marker settings and how waveforms are displayed by using the Touch screen Actions menu Select Span Zoom CF Pan Zoom Pan Reset scale Marker to peak Next peak gt Add marker Delete marker All markers off To use the Touch screen Actions menu touch the display in a graph area and hold for one second then remove your finger You can also use a mouse to display the Touch screen Action menu by clicking the right mouse button SignalVu Vector Signal Analysis Software Printable Online Help 51 Reference Icon R iil Menu Select Span Zoom Touch screen Actions Description Selects markers and adjusts their position Zooms the graph area about the selected point Touch the graph display at a point of interest and drag to increase or decrease the s
88. cncconcnccnncnnconcnnncnncnncnnos 5 Taking Measurements Measure ments casi edet endure PIRE ir eerta e eui uoo qud erus ed elsi do E SEENE 7 Saving and Recalling Data ui de dea ida 9 General Signal Viewing Amplitude vs Time Display ceto tete Fete een EENE aces 11 Frequency vs Time Display is 12 Phase ys Time Display 00 A A PEE ERU 13 REI amp Qrvs Time Display eec eee rre tex pe RN EEEE eva gi ae en e es 15 Spectrogram Display cce nte tas aea x tous aia 16 Spectrum Display loba 18 Time OVA AAA aa 19 GP Digital Modulation Constellation Displ PP DUEUUU U 21 EVM vs Time Dis Plica A A CRUS 22 Magnitude Error vs Time Display ooooooccoocconnconnonnnconnrnnncon nr nn c rn me e emen eene 23 Phase Error vs Time Display oi aca 25 Signal Quality Display iii obs 26 Symbol Table Display iii ee etae yep Que e eei X dpa UE RI E Rd E ON SERIEN OE En aS dS 27 RF Measurements OIL c A EE A dada ideo 28 Channel Power and ACPR Adjacent Channel Power Ratio Display oooooooocooonconcccono oo 29 MCPR Multiple Carrier Power Ratio Display sss men 32 Occupied BW amp x dB BW Display ssssssssssssssssssseee meme mese menn 34 Spurious Display IP ie odian 37 SignalVu Vector Signal Analysis Software Printable Online Help Table of Contents Pulsed RF Pulse Statistics DispPlaYicniiasi n inane oper eda edere de Se C ho URP URn OUR KR a eg 40 Pulse Table Display tec ee cers teen bad cess sane c
89. component versus frequency Spectrum Analysis The technique or process of determining the frequency content of an RF signal Spectrum Analyzer A device for determining the frequency components of a signal Spectrum Time Analysis Time for spectrum analysis views Spectrum time can be the same as Analysis Time but it can be different Spur A spur is a signal peak that exceeds a user definable threshold See Spurious gt Settings gt Ranges and excursion setting A spur that also exceeds a limit either Absolute or Relative specified on the Settings 7 Limits tab is considered a violation SignalVu Vector Signal Analysis Software Printable Online Help 179 Glossary Spurious Response Spurious Response A response to a analyzer wherein the displayed frequency is not related to the input frequency Time Reference The point in time during the acquisition record used as the zero point for counting time The time reference can be set to either the start of the acquisition record or the trigger point Trace As used in this online help trace refers to the displayed signal The displayed signal can be a processed version of the input signal for example it may be averaged The trace is a result or output Vector Signal Analyzer Like a spectrum analyzer a device for determining the frequency components of a signal However unlike a standard spectrum analyzer the vector signal analyzer is optimized for analyzing digitally
90. cope is calculated from SignalVu s Reference Level control value Reset all scope settings to default values Press this button to change all oscilloscope settings to the oscilloscope s default values SignalVu Vector Signal Analysis Software Printable Online Help 149 Reference Topics Show Pulse Definition Show Pulse Definition The Show Pulse Definition check box enables the display of colored lines that overlay the measurement pulse and show the points on the waveform where the measurement is being taken A green arrow along the left edge shows where the Pulse Detection threshold is set vertically Spectrum Time Tab This tab controls whether the Spectrum display uses the same Analysis Time parameters as all the other views or uses a different Offset and Length Analysis Time Spectrum Time Frequency Units Spectrum Time Mode spectrum Time E ctrum Offset 20 000 ns Independent Spectrum Offset f Spectrum Length 7 460 us v Aut Use Analysis Time settings p gt lv Auto Actual 7 460 us Settings Description Spectrum Time Mode Independent Causes the spectrum analysis views to use the settings unique to those displays Use Analysis Time settings Causes the spectrum analysis views to use the settings on the Analysis Time tab Spectrum Time only available when Independent is selected Spectrum Offset Sets the beginning of Spectrum Time with respect to the selected time reference point
91. cqBW to XX Hz The requested RBW is too close to the acquisition BW Increase the frequency range of the measurement for example Span RBW too small large for current Acq BW If the RBW is set manually it is possible for the acquisition bandwidth to be incompatible with the RBW setting B Change the RBW setting SignalVu Vector Signal Analysis Software Printable Online Help Reference Error and Information Messages m Adjust the Acq BW setting either directly Setup gt Acquire gt Sampling Params select on of the manual modes or by adjusting the measurement bandwidth of the selected display Setup gt Acquire gt Sampling Params All Auto Recall error Setup not completely restored An error occurred while recalling a Setup file Thus the current setup may be a combination of settings from the Setup file and the previous Setup Recall the setup again Recall failure problem with file or file contents An error occurred while recalling a Setup Trace or Data file This can occur because of a problem opening the file operating system error or because of a problem with the contents of the file Recall the file again Restoring acquisition data This is a status message displayed while data is being restored from a file Save failure file not saved An error occurred while saving a Setup or Data file m Save the file again Saving acquisition data This is a status message displayed while data is being sa
92. ctual This is a displayed value not a setting It is the Analysis Length time or symbols being used by the analyzer this value may not match the Analysis Length requested in manual mode Units Sets the units of the Analysis Length to either Symbols or Seconds Analysis Offset Use analysis offset to specify where measurements begin Range 0 to end of acquisition Analysis Length Resolution 1 effective sample or symbol Analysis Length Use the analysis length to specify how long a period of time is analyzed by a measurement After you enter a value this box changes to show the actual value in use which is constrained by Acquisition Time SignalVu Vector Signal Analysis Software Printable Online Help 97 Reference Topics Average Channel Power Pulsed RF Displays This setting is not available when Auto is checked Range minimum value depends on modulation type Resolution 1 symbol The maximum number of samples that can be analyzed is 80 000 Time Zero Reference The analysis offset is measured from this point Choices are Acquisition Start or Trigger Parameter Description Acquisition Start Offset is measured from the point at which acquisition begins Trigger Offset is measured from the trigger point Average Channel Power Pulsed RF Displays The total RF power in the selected channel located in the ACPR display Average ON Power Pulsed RF Displays The average power transmitted during pulse on
93. d Span 40 00 MHz r Time domain Bandwidth Settings Description Span The frequency span used for analysis in the Amplitude vs Time display Time domain Bandwidth Time domain Bandwidth is a filter used to process the input signal before the acquisition system analyzes the signal Carrier Feedthrough Measurement The carrier feedthrough is the offset of the constellation from zero power The feedthrough is measured in dB relative to either the RMS symbol magnitude or the Peak Symbol magnitude as selected by the user CCDF Complimentary Cumulative Distribution Function The Complementary Cumulative Distribution Function CCDF represents the probability that the peak power above average power of a measured signal exceeds a threshold 100 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Channels Tab ACPR CCDF is a plot of the percent of time that a signal s power value exceeds it average value versus the amount by which it exceeds the average The CCDF plot has a log of probability on the Y axis 100 at the top and dB above average amplitude on the X axis 0 at the left Channels Tab ACPR The Channels tab is where you specify parameters for the channels measured in the ACPR display Freq Span amp REW Measurement Params Channes Scale Prefs Number of adjacent pairs 2 Channel Bandwidth 3 54 MHz Channel Spacing 5 MHz Setting Description Number of adjacent pairs
94. d ideal phase value After the phase error 1s calculated for all points in the acquisition record the largest error in the positive direction and the largest in the negative direction are determined Whichever of these two values has the greater absolute value is designated the Max Phase Error Measurements Tab The Measurements tab is used to specify the measurements that appear in the Pulse Table Measurements Params Method Ponts Show in Pulse Table v Average ON Power Cl Peak Power C Average Transmited Power V Pulse Width D Rse Time Y Show in Pulse Table Checked measurements appear in the Pulse Table Measurement Params The Measurement Params tab is where you set parameters that control the ACPR and MCPR measurements Freq amp RBW Measurement Params Channels Scale Prefs Average Time Dorrain w Number 10 Channel Filter Root esed Cosine Requires triggered synchronous signal Filter Parameter 0 22 Optimization Power Reference Dynamic Range v Total active channels Chip Rate 3 84 MHz 122 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Modulation Tab Measurement Description Average Enables disables measurement averaging Averaging can be enabled in either the Frequency Domain or Time Domain Number When Averaging is set to Frequency Domain this value specifies the number of acquisitions to be averaged When Averaging is se
95. d to the Event Viewer from the analyzer application appear under Source as TekRSA 5 Double click the last error reported for TekRSA to see details on the most recently reported error Please note that many items reported as errors are simply informational and do not mean that your instrument is impaired Contact the Tektronix Customer Support Center or Service Center if you are concerned about an error shown in the Event Viewer Do not send an instrument out for repair based solely on these event reports SignalVu Vector Signal Analysis Software Printable Online Help 111 Reference Topics Droop Measurement Pulsed RF Display Event Properties Event Date JSP S TekRASA Time 3 12 31 PM Category None Type Error EventID 3 User N A Computer TEKSCOPE C1094B Description Option and Version Information Product Software Version Number 1 3 543 Installed Options Essentials Opt SVE Pulse Measurements Opt SVP General Purpose Modulation Analysis Opt SYM Bytes Word Droop Measurement Pulsed RF Display Droop is the power difference between the beginning and the end of the pulse On time A straight line best fit is used to represent the top of the pulse The result is a percentage referenced to the Average ON Power Duty Factor Measurement Pulsed RF The ratio of the width to the pulse period expressed as a percentage Duty Factor Ratio Measurement Pulsed RF The ratio
96. der consists entirely of the DataFile element This element is broken down into sub elements 1 DataSetsCollection 2 Setup DataSetsCollection The DataSetsCollection contains a DataDescription element a DataSet element and a ProductSpecific element Binary Data Binary data is a sequence of Int32 values which are IQ pairs LQ LQ in binary Little Endian format To convert these values to volts multiply the individual values by the Scaling value in the DataDescription The binary data starts at an offset into the file the offset attribute in the DataFile element This offset number will always start at the 19th character into the file starting with 1 and will always be 9 characters long NOTE You should not casually modify the XML header because this will change the offset to the start of the binary data SignalVu Vector Signal Analysis Software Printable Online Help Reference Error and Information Messages Acquisition Data Files csv The acquisition data files have two sections At the top of the file is the following information SamplingFrequency The sampling frequency in Hertz E NumberSamples The number of IQ samples in the file m DateTime When the data was acquired B Frequency The center frequency in Hertz B AcquisitionBandwidth The acquisition bandwidth Hz Following the AcquisitionBandwidth are the data The data are IQ pairs in volts Groupings of settings or results are head
97. display to show the selected markers values a marker Touch marker to select and Adjust the setting associated with the Marker then use knob or arrow keys Touch and drag a marker Changes marker position to the drop point Changing the Spectrum Display Settings see page 90 Time Overview The Time Overview is a display that shows the entire acquisition record and shows you how the spectrum time and analysis time fit within the acquisition record This enables you to see how you can adjust the spectrum time and analysis time to measure portions of the data SignalVu Vector Signal Analysis Software Printable Online Help 19 Taking Measurements Time Overview Note that the trace s in the Time Overview display is limited to 10 000 points Ifthe Analysis Length includes more than 10 000 sample points the trace is decimated using the Peak method similar to Peak detection in a Spectrum display to 10 000 points This decimated trace 1s what is used for marker measurements The Time Overview window displays the Spectrum Length and Analysis Length The Spectrum Length is the period of time within the acquisition record over which the spectrum is calculated The Analysis Time is the period of time within the acquisition record over which most measurements such as Amplitude vs Time are made The Spectrum Length and Analysis Length can be locked together so that the data used to produce the Spectrum display is also used for measureme
98. e to Acquisition Length Resolution 1 effective sample or symbol SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Time Zero Reference Analysis Time Tab GP Digital Modulation The analysis offset is measured from this point Choices are Acquisition Start or Trigger Point Parameter Description Acquisition Start Offset is measured from the point at which acquisition begins Trigger Point Offset is measured from the trigger point Analysis Time Tab GP Digital Modulation The Analysis Time tab contains parameters that define how the signal is analyzed in the general purpose digital modulation displays Constellation Modculston Advanced Params Find Analss Time Trace Prefs Settings Analysis Offset 25 000 us Y Auto Time Zero Reference Acquistion Start Analysis Length 25 600 us v Auto Units Seconds v anter Actual 25 600 us L 27 UENS Setting Description Analysis Offset Specifies the location of the first time sample to use in measurements Auto When enabled causes the instrument to set the Analysis Offset value based on the requirements of the selected display Analysis Length Specifies the length of time to use in measurements Auto When enabled causes the instrument to set the Analysis Length value based on the Time Zero Reference requirements of the selected display Specifies the zero point for the analysis time A
99. e Open dialog box 4 Select the file to recall 5 Click Open Setup Files You can set up the instrument as desired and then save the settings in a setup file This enables you to quickly setup the instrument by recalling previously saved setups Exporting Results Save for further analysis of results in other programs such as MATLAB or Excel Pictures of the Selected Display You can save pictures of the instrument display for documentation purposes When saving pictures of the display you can select from three file types BMP JPG or PNG Measurement Settings You can save a list of settings relevant to the selected display to a file for documentation purposes The exported file uses tab characters to separate values The settings included in the file depend on the selected display The contents of the file are the same as a Results export except it does not include the results Saving Acquisition Data with Setup Save for later analysis with the analyzer Saving the data with setup ensures the analysis parameters are the same when the data is recalled Saving Acquisition Data Export in CSV Format Save for examining results in other programs such as MATLAB or Excel 10 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Amplitude vs Time Display Amplitude vs Time Display The Amplitude vs Time display plots the signal amplitude against time The amplitude appears on the vertical axis
100. e action to take when the search condition is met Signal Quality Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for Signal Quality are accessible only when the Signal Quality display is selected Settings tab Description Modulation see page 123 The Modulation tab specifies the type of modulation used for the input signal and other parameters Advanced Params see The Advanced Params tab specifies frequency offset magnitude normalization method page 95 and allows you to swap the and Q signals Find see page 113 Find tab is used to set parameters for finding bursts within the data record Analysis Time see page 97 The Analysis Time tab contains parameters that define the portion of the acquisition Prefs see page 130 record that is used for analysis The Prefs tab enables you to set characteristics of the measurement display Spectrum Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for the Spectrum display are visible when Spectrum is the selected display 90 SignalVu Vector Signal Analysis Software Printable Online Help Reference Settings tab Spectrogram Display Settings Description Freq amp Span see page 115 BW see page 98 Sets frequency and span parameters for the Spectrum Analysis display Sets Resolution Bandwidth and windowing parameters Traces
101. e cee eee ene eese eme ese eme ese nnne 114 Eres Span Tab rer E DIS aaa 115 Freg Estimation Eo ERR T 115 Frequency Deviation Measurement issssssssssssssssssssess e sese ese mee e eee nre 117 Frequency Error Meas remetit oe onere eT ER UNO e ees wa a ra 117 Ipse EL 117 Gain Imbalance Measurement ssssssssssssssssesssses e ee me messe eee e messem e essen nn 117 IQ Origin Offset Measurement 0 6 cece cece nro n e eee e e e me ese e eee hee e nennen 117 IQ Sampling Parameters ssssssssssssssssssssesseeee eee e ee eme ese e eese e eese nen 118 IS ELLE 118 Limits Tab Spurious Display ssssssssssssessssesssee ee e eme e e eme ee mee eene 119 Magnitude Error Measurement ooooocoocnconconnncnnncnnncnn cr eese ese eme ese ehe hh hene 121 Marker to Center Frequency oooocccoococnnconconnnonnnonnncnn nr e ehe ese eme e e ehe e eee nnne 121 Maximum Frequency Error Measurement 00 c cece cece cence ene ene nee nee mee eene 121 Maximum Phase Error Measurement 0 ce cece eee e eee nnn n nr nn nr nrr nr e eese nennen 122 Measurements Tab boca tee e RU Ra ta pa de dto 122 Measurement Para as od te 122 Mod aa R s 123 SignalVu Vector Signal Analysis Software Printable Online Help Table of Contents Multiple Carrier Power Ratio iii A A Ue RR ER e A cess 125 Next Peak Markers menu 0 cece cece cece nnn eme messe ehe ehe ehe ene
102. e finished making changes SignalVu Vector Signal Analysis Software Printable Online Help 103 Reference Topics Channel Power To edit the offset or bandwidth of an Adjacent channel 1 Select the channel to be edited in the channel definition table 2 Select Edit This displays the Edit Channel Parameters dialog 3 Adjust the values for the Frequency Offset or Bandwidth as required 4 Select the Close box when you have finished making changes Adding Channels To add a main channel 1 Select the Number entry box 2 Usethe knob to enter a value for the desired number of Main channels 3 Select the Close box when you have finished making changes To add an adjacent channel pair 1 Select Add This displays the Edit Channel Parameters dialog 2 Use the knob to enter values for the Frequency Offset and Bandwidth as required The Frequency Offset is measured from the Center frequency of the Main channels 3 Select the Close box when you have finished making changes Deleting Channels To delete a main channel 1 Select the Number entry box 2 Use the knob to reduce the number of channels or enter a new value using the front panel keypad 3 Select the Close box when you have finished making changes To delete an adjacent channel 1 Select the channel to be deleted in the channel definition table 2 Select Delete This removes the selected channel from the channel table 3 Select the Close box when you have
103. e type of data you want to save Picture of Selected Display and specify the location of the saved file As long as the Save and Export option see page 78 is set to automatically name saved files the next time you want to save a picture of the display you can just press Save on the front panel and a picture of the selected display will be saved without requiring you to type a file name or the location of the file to be saved 68 SignalVu Vector Signal Analysis Software Printable Online Help Reference Print Print Print What Data Types Can Be Saved Data type Description Acquisition Data Data collected during acquisition that can be recalled for later analysis Data is saved in a format readable only by RSA6100A Series instruments or oscilloscopes running SignalVu software Setup Configuration information detailing instrument settings Data can be saved in a format readable only by RSA6100A Series instruments or oscilloscopes running SignalVu software or in a text file Selected Trace Saves the selected trace for later analysis by the analyzer Data is saved in a format readable only by RSA6100A Series instruments or oscilloscopes running SignalVu software Exported Traces and Numeric Results Save traces and results in a file format that can be used by other programs Pictures of the Display Save screen images in graphic image file formats that can be used in other programs Exported Ac
104. e value for the Symbol Rate in this entry box Measurement Filter The available measurement filters are None Root Raised Cosine Raised Cosine Gaussian B Rectangular m IS95TX MEA m IS9STXEQ MEA m ISOSRef SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Multiple Carrier Power Ratio The measurement filter is applied before the demodulation bit is detected and the ideal reference is calculated Reference Filter The available reference filters are Raised Cosine Gaussian Rectangular IS95TX MEA IS95TXEQ MEA IS95Ref The reference filter is applied to the internally generated ideal reference signal before the EVM is calculated Filter Parameter The filter parameter specifies the alpha for the Root Raised Cosine or Raised Cosine filter or the BT for the Gaussian filter Multiple Carrier Power Ratio The ratio of the signal power in the reference channel or group of channels to the power in adjacent channels Next Peak Markers menu Selecting Next Peak displays a submenu that enables you to move the selected marker to the next peak Setting Description Next Left Moves the selected marker to the next peak to the left of the current marker position Next Right Moves the selected marker to the next peak to the right of the current marker position Next Lower absolute Moves the selected marker to the lower level peak in absolute terms on the trace Next H
105. easurement 121 Magnitude Error vs Time display 23 Magnitude Error vs Time settings 85 manuals 4 marker 174 Marker Noise mode 48 Marker Properties tab 44 Marker to Center Frequency 121 Markers 73 Marker Toolbar 73 Using Markers 46 Using Markers in Noise Mode 48 Markers menu 77 Mask Editor 106 max hold 174 Max number of pulses 128 Max trace points 13 Maximum Frequency Error measurement 121 Maximum Phase Error measurement 122 MCPR multiple carrier power ratio 174 MCPR display 32 MCPR settings 86 Measurement Filter 123 Measurement Params tab 122 Measurement settings export 9 Measurements 7 Measurements tab 122 Menus 66 min hold 175 modulate 175 modulating signal 175 modulation 175 modulation measurements 7 Modulation tab 123 Multiple Carrier Power Ratio 125 N noise 175 noise bandwidth NBW 175 noise floor 175 Noise markers 48 O OBW Level Left Right 34 OBW Ref Power 34 Occupied Bandwidth 176 Occupied Bandwidth settings 86 Occupied BW display 34 online help 126 Open Recall 176 Optimization 122 Options installed 4 Options control panel 78 OQPSK 176 P Parameters tab CCDF display 126 Occupied BW display 127 Spurious display 127 Params tab Pulsed RF display 128 Peak Excursion 44 Peak Power measurement 129 Peak Threshold 44 Peak Average Ratio Measure ment 129 Phase Deviation measurement 130 Phase Error measurement 130 Phase Error vs
106. ecceeneesscesdsesetevssedeteceteesdenneceseeseeusvubeneds 88 Restoring Default Settings ici rioris EET ore d Rao HR PE Ue eu cetsdvanscdeeded eens 89 REL amp OQ vs Time Sete ica RN ERR TR EA ENS aaa 89 Search Limits Testing Settings csse mene mes esee 89 Signal Quality SSUINES NER da ie 90 Spectrum Display Settings ini eet ot tr ee e BORN ios 90 Spectrogram Display Settings oooocccocooocconcononccnnononnon cnn nnn rn nan nn EEE enn nen EE EEE ne 91 Spurious Display SettidgsS ooooooooccconcoonconnconnnonononn ee se eme ese eme esee eese nen 91 Symbol Table Display Settings csse eese esee eese eee 92 Time Overview Display SettidgS o ooooooocoocoonnconconnnconccnnncon ron nr cnn rr nn se menses 92 Reference Topics About the Vector Signal Analysis Software sssssssssssssssssssssssee eee e eene 93 Actions Tab S 94 Adjacent Channel Leakage Power Ratio sssssssssssssssssssssese eme mene 95 SignalVu Vector Signal Analysis Software Printable Online Help iii Table of Contents Adjacent Channel Power dere tO A E aaa 95 Advanced Params da 95 Analysis Time Tab Analysis Control Panel ccc cece cece ence een ene eee ene mee 96 Analysis Time Tab GP Digital Modulation 0 c cece cece cece nee seses eee eee emnes 97 Average Channel Power Pulsed RF Displays 0 ccc cceeec cence eee e eee mene ne 98 Average
107. eceived from the oscilloscope or from a recalled oscilloscope waveform file EE Vertical IQ Sampling Parameters Scope Settings Scope Data Sample Rate 25 000 GSamples s Record Length 2 137088 MSamples Scope Settings The Scope Settings tab is where you specify which oscilloscope settings are controlled by the SignalVu software EE Vertical IQ Sampling Parameters Scope Settings Scope Data Signalvu sets scope controls v Sample Rate v Other acquisition horizontal settings Vertical settings Setting Reset all scope settings to default values Sample Rate When enabled SignalVu adjusts the sample rate as required based on measurement settings in the analysis software Sample rate determines the maximum available measurement bandwidth Other acquisition horizontal settings When enabled SignalVu adjusts the oscilloscope horizontal and acquisition settings fo the oscilloscope as needed to provide the best results For example SignalVu sets Sampling Mode to Real Time Only and Horizontal Mode to Manual when it is allowed to control these parameters Checking these boxes helps reduce variability in the SignalVu results Vertical settings When enabled SignalVu adjusts the oscilloscope s vertical settings Vertical settings include Coupling Bandwidth Scale and Termination SignalVu sets these to values appropriate for RF signals The Scale value sent to the oscillos
108. ecifically to one or more measurements appear in the SignalVu Vector Signal Analysis Software Printable Online Help 59 Reference Error and Information Messages 60 displays Messages that pertain globally such as those about hardware status are shown in the Status Bar at the bottom of the analyzer application window Acq BW too small for current setup The display needs a wider acquisition bandwidth than what the current data record contains This can be due to any of the following reasons B The sampling parameters are being manually controlled In the Acquire control panel gt Sampling Parameters tab set the Adjust control to All Auto to allow the software to pick the sample rate and record length that it needs B A display other than the one you intended has been selected The selected display has requested a smaller acquisition bandwidth to achieve a better accuracy or dynamic range for its particular measurement Select the display that contains the message Click Run if the instrument is not already acquiring data B Acquisitions are not running and the measurement now requests a wider bandwidth than the last acquisition Click Run to perform a new acquisition with a wider bandwidth m The data is from a recalled TIO file There is no way to increase the acquisition bandwidth for saved IQ data You must adjust the measurement settings so that less bandwidth is required The data is from a recalled oscilloscope wavefo
109. ed values of the signal frequency during the Measurement Time Phase Deviation The Phase Deviation is the difference between the maximum and minimum Phase values measured during the ON time of a pulse Time This is the time in seconds relative to the time reference point in the first acquisition record in the data set SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Saving and Recalling Data You can save different types of data for later recall and analysis Saving and Recalling Data Data type Description Save as type Setup files Saves all of the setup information for Setup all displays except those settings that are not part of Preset Picture of Selected Display Saves a capture of the screen in the Picture PNG JPG BMP specified format This option is useful for including the graphic in reports or other applications Marker readouts and other information are included Results Export files Saves the trace and numeric data for the selected display The trace and numeric data is saved as CSV files Results export Measurement Settings Saves a list of settings relevant to the selected measurement to a text file This option is useful for including the measurement settings in reports Measurement settings export TXT Trace Saves a trace for later recall back into Selected trace the display from which it was saved Data Saves data for reana
110. ed with some text The first thing in the file is the measurement name and the date time when the acquisition was taken The first grouping Parameters are global parameters Measurement Bandwidth in this group is the measurement bandwidth used by the General Signal Viewing measurements Spectrum Amplitude vs Time etc It also includes some source settings like Acq BW Dither Preamp and RF Attenuation The second grouping Parameters are measurement specific parameters Another grouping which may occur is Trace Parameters Within this group there will be a set of parameters one for each trace that is currently shown Another grouping is Results These are scalar results for the measurement Another grouping is Traces It has Trace groups under it one for each trace Each Trace group has some background information about the trace units number of points x scaling etc and the trace points themselves Acquisition Data Files mat The acquisition data files saved in MatLab format contain the following MatLab variables InputCenter The center frequency in Hertz m XDelta The sample period in seconds B Y A complex array containing IQ pairs nputZoom Always 1 and indicates complex data Error and Information Messages Error and Information Messages The following list describes some of the common error and information messages that might appear during instrument operation Messages that apply sp
111. ee page 69 Displays a preview of the print output Preset see page 72 Preset resets the instrument to factory defaults Acquisition data and settings that have not been saved will be lost Exit Closes the SignalVu application Exit does not shut down the instrument Recall Menu Bar File gt Recall Use the Recall command to load previously saved acquisition data setups or trace data To recall data or setups 1 Select File gt Recall This displays the Open dialog SignalVu Vector Signal Analysis Software Printable Online Help 67 Reference Save Save As 2 Select the file type to be recalled and click Open Save Save As Menu Bar File gt Save Save As Use Save Save As to store acquisition data setups and traces Save is also used to export traces results and pictures of the display for use in other programs Difference Between Save and Save As Use Save As to specify what kind of data you want to save and where the data should be saved Use Save to quickly save the same data as you saved the last time you executed a Save without having to specify the data type and location For example suppose you want to save a picture of a spectrum trace each time you adjust a circuit to document how the adjustments affect the output of the circuit The first time you want to save a picture of the display you will need to select Save As From the Save As dialog box you specify th
112. efault 3 Type a name for the saved trace and click Save Recalling Traces You can display saved traces for comparison by selecting the Show recalled trace checkbox To display a recalled trace 1 Click the button to display the Open dialog box Show recalled trace J 2 Navigate to the desired file and click Open 3 Click the Show Recalled Trace checkbox so it is checked 4 Verify that the trace s Show checkbox is selected either on this tab or next to the drop down list located at the top left corner of the graph Traces Tab Error vs Time Display The Traces Tab allows you to set the display characteristics of the displayed trace SignalVu Vector Signal Analysis Software Printable Online Help 161 Reference Topics Traces Tab Math Trace Scale Traces Modulation Advanced Params Analysis Time Display Points symbol 4 v Setting Description Points per Symbol Select how many points to use between symbols when connecting the dots Values 1 2 4 8 Traces Tab Math Trace This tab is not a distinct tab it is just how the Traces tab appears when Math is selected in the Trace drop down list Tae DONE D show D Freeze Save Trace As Trace w minus traces v Trace 4 1s a mathematically derived trace defined as Trace A minus Trace B You can select Trace 1 2 or 3 to serve as either Trace A or Trace B Setting Description Trace When set to Trace 4 Math this t
113. elect Kj Span Zoom CFPan Zoom SY Pan Reset scale Marker to peak Next peak gt Add marker Delete marker All markers off To use the Touchscreen Actions menu touch the display and hold for one second then remove your finger You can also use a mouse to display the Touchscreen Action menu by clicking the right mouse button Menu item Description Marker to peak Moves the selected marker to the highest peak If no marker is turned on this control automatically adds a marker Next Peak Moves the selected marker to the next peak Choices are Next left Next right Next lower absolute and Next higher absolute Add marker Defines a new marker located at the horizontal center of the graph Delete marker Removes the last added marker All markers off Removes all markers Using Markers in Noise Mode 48 In the Spectrum display you can set Markers to Noise Mode to measure noise on the trace Markers in Noise Mode operate just as they do in normal mode but the readouts for the markers are in dBm Hz and dBc Hz dBm Hz is the power in milliwatts referenced to a 1 Hz bandwidth To make this measurement the analyzer assumes that the measured signal is random noise It then converts the measured power made at any RBW to the power that would be measured had a 1 Hz filter been applied for the measurement SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Using Markers i
114. elect the trace in the spectrum display that is the Search in trace Search For The Search for setting has four selections The first two selections are simple less than and greater than searches The second two selections are for mask searches If you select a greater than less than search you also specify the level that defines a violation If you specify a mask based search then you need to edit the mask to specify the levels that define a violation Greater Than Less Than Searches When you select either is greater than or is less than a text entry box appears to the right of the drop down list Use the text entry box to specify the signal level you wish to search for Mask based Searches When you select is outside mask or is inside mask an Edit limits button is displayed Select the Edit limits button to display the Mask Editor SignalVu Vector Signal Analysis Software Printable Online Help 107 Reference Topics Define Tab Search 108 E Mask Editor Add Point Delete X Lg Y Power 5 000000 MHz 20 dBm 2 000000 MHz dBm 2 000000 MHz dBm X aos values Absolute 5 000000 MHz 20 d8m 10 000000 MHz 20 dBm Relative Cancel To edit a search mask 1 2 3 4 Click Edit limits to display the Mask Editor Click New Table to create a table This clears the existing points and loads the default table Select the X axis values setting a Select Absolute to specify mask poin
115. ements in Sets parameters that define a spur Review save and load the Range table from this tab Specifies Pass Fail limit parameters Specifies the trace Function Trace see page 155 Scale see page 147 Specifies the vertical and horizontal scale settings Prefs see page 131 Specifies the appearance features of the graph area SignalVu Vector Signal Analysis Software Printable Online Help 91 Reference Symbol Table Display Settings Symbol Table Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for the Symbol Table view are shown in the following table Settings tab Description Modulation see page 123 The Modulation tab specifies the type of modulation used for the input signal and other parameters Advanced Params see The Advanced Params tab specifies additional parameters page 95 Find see page 113 Find tab is used to set parameters for finding bursts within the data record Analysis Time see page 97 The Analysis Time tab contains parameters that define the portion of the acquisition record that is used for analysis Prefs see page 130 The Prefs tab enables you to set characteristics of the measurement display Time Overview Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for Time Overview are shown in the following table Settings tab De
116. ence level so that the peak of your signal is about 10 dB below the top of the spectrum display 4 Setthe modulation parameters for your signal This includes the Modulation Type Symbol Rate Measurement Filter Reference Filter and Filter Parameter All of these settings are accessed by pressing the Settings button SignalVu Vector Signal Analysis Software Printable Online Help Reference Application Presets For most modulated signals the Modulation Analysis application preset should present a stable display of modulation quality Additional displays can be added by using the Displays button and other settings can be modified to better align with your signal requirements Pulse Analysis The Pulse Analysis application preset opens the following displays Time Overview Shows amplitude vs time over the analysis period Pulse Trace Shows the trace of the selected pulse and a readout of the selected measurement from the pulse table B Pulse Measurement Table This shows a full report for the user selected pulse measurements You can make a selected pulse and measurement appear in the Pulse Trace display by highlighting it in the Pulse Measurement Table Key pulse related parameters that are set by the Pulse Analysis application preset are Measurement Filter No Filter Measurement Bandwidth This is set to the maximum real time bandwidth of the instrument Note The label on the Measurement Bandwidth setting is just B
117. encies are Correlated Changing the values for Center frequency Start frequency Stop frequency or Span will change the values for the other settings depending on which setting you change For example if you change the Center frequency the Start and Stop frequencies will be adjusted automatically to maintain the same Span Note however that if the Start and Stop frequencies are changed so that they are closer than the minimum span setting the Start and Stop frequencies will be adjusted to maintain the minimum Span setting Setting Changed Manually Settings Changed Automatically As Setting Not Automatically Changed a Result Start Center Span Stop Stop Center Span Start Center Start Stop Span Span Start Stop Center Freq Estimation Tab Use the Freq Estimation tab to specify parameters used for determining frequency error SignalVu Vector Signal Analysis Software Printable Online Help 115 Reference Topics Params Define Levels Freg Estmaton Freq Estimation Tab Scale Prefs Modulation type CW constant phase v v Auto hi Setting Description Modulation type Specifies which algorithm to use for estimating frequency error Pulse Frequency Reference Specifies the method used to determine the pulse frequency reference Auto Selecting Auto causes the instrument to calculate the values necessary to determine the pulse frequency reference Freq Offset If Auto is not enabled specify the v
118. ents will be taken Absolute measurements will still be taken 136 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Repeat Repeat Menu Bar Run gt Repeat Selecting Repeat sets the Run mode to Repeat In Repeat mode as soon as one acquisition sequence completes another begins Note that an acquisition sequence can require more than one acquisition For example in a spectrum view the trace function might be set to Average 100 acquisitions Thus a complete acquisition sequence would consist of 100 acquisitions that are averaged together to create the trace that is displayed Repetition Interval Measurement The time from a pulse rising edge to the next pulse rising edge Repetition Rate Measurement The inverse of repetition interval Repetition Interval is the time from a pulse rising edge to the next pulse rising edge RF Channel Power Measurement The RF channel power gives an indication of the total average and other measures RF power in a given channel For some communications systems there is an out of service total power measurement defined in the specifications that calls for a specified constant modulation In this case the output power should be relatively constant For many measurements this may not be the case and the Power Measurement results will vary as the signal varies Average power is the square root of the sum of the squares of the voltage samples over the mea
119. epe rne ODE eA IE ES RE MERE IA KE 179 Spectrum Analyzer eee reto oue ise o ee edad ey prt e ose Mete Noa ciues or ve vu E 179 Spectritm TIME P A A ala 179 sul mL 179 Spurious RESPONSE sui RAE E UTMTTS 180 Time Reference TT 180 icc 180 Vector Signal Analy Ze pension 180 Vertical Scale Factor Vertical Display Factor 00 ccc cece seen eee ee eee eee e eee 180 VIO AVION EEUU 180 SignalVu Vector Signal Analysis Software Printable Online Help Welcome Welcome Welcome This help provides in depth information on how to use the SignalVu Vector Signal Analysis Software This online help is also available in a PDF format for printing NOTE Most of the screen illustrations in this document are taken from the vector signal analysis software version that runs on the RSA6100A Real time Spectrum Analyzers These instruments support additional hardware based functionality and buttons such as Trig and Ampl that are not present in the Signal Vu application SignalVu Vector Signal Analysis Software Printable Online Help 1 Welcome Welcome 2 SignalVu Vector Signal Analysis Software Printable Online Help About Your Instrument Product Description Product Description SignalVu vector signal analysis software helps you easily validate wideband designs and characterize wideband spectral events By combining the signal analysis engine of the RSA6100A real time spectrum analyzer wit
120. equency difference between the measured carrier frequency of the signal and the user selected center frequency of the analyzer OBW Level left The signal level at the left edge of the occupied bandwidth OBW Level right The signal level at the right edge of the occupied bandwidth OBW Ref Power The total power measured within the measurement bandwidth x dB BW Ref Power The peak power measured within the measurement bandwidth Changing the Occupied Bandwidth Settings see page 86 36 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Spurious Display To show the Spurious display 1 2 Click the Displays button or select Setup gt Displays From the Folders box select RF Measurements Spurious Display Double click the Spurious icon in the Available displays box This adds the Spurious icon to the Selected displays box and removes it from the Available displays box Alternatively you can click the Spurious icon and then click the Add button to select Spectrum for display Click the OK button Elements of the Spurious Display w Run Markers Setup Toos window Help eras Tna J Acc Ana gt Freq 2 15900 GHz 2 RefLev 0 00 dem ami Ref 8 23 dBm nf Markers 100 00 dBm Start 1 610 GHz Stop 2 160 GHz Ref Int Atten 25 dB 0070 005 SignalVu Vector Signal Analysis Software Printable Online
121. erence Daka Markers Ad Marker MR Mi A Attach to Borap BrTap J Delete in selected display Readouts Deka v 1 Select Markers gt Define Markers to display the Define Markers control panel 44 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Define Markers Control Panel 2 Select Add to turn on the next marker A drop down list under the marker label allows you to assign the marker to a trace NOTE The first marker defined will always be MR The MR marker is the reference for delta marker readouts 3 Select the trace to which the marker should be attached from the drop down list 4 Click Add to add additional markers 5 Click the close button to remove the Define Markers control panel Defining Peaks You can specify two amplitude values that define peaks Define Marker Properties Define Peaks Markers x Signal Denst Peak Threshold 2 00 Peak Threshold 150 CB Minimum Excursion 2 00 Delete Minimum Excursion 6 d8 Smoothing pixels squared 5 woe NOTE The settings shown in the DPX Signal Density section of the Define Peaks tab are not used by Signal Vu Amplitude Peak Threshold Peak Threshold specifies the level that the signal must exceed to be considered a peak Minimum Excursion Minimum Excursion specifies how much the signal must decrease and then increase before another peak can be declared 1 Select Markers gt
122. ess the application presets through the Application Presets menu item To load an application preset 1 Select File gt Application Presets This opens the Applications Presets dialog window 2 Select the application preset that suits your needs 3 Click OK to recall the application preset Application Preset Description Modulation Analysis The Modulation Analysis setup application preset provides you with the most common displays used during modulation analysis Pulse Analysis The Pulse Analysis application preset provides you with the most common displays used during pulse analysis and makes changes to the default parameters to settings better optimized for pulsed signal analysis Option SVP is required to use the pulse measurements applications preset Time Frequency Analysis The Time Frequency preset configures the instrument with settings suited to analyzing signal behavior over time Modulation Analysis The Modulation Analysis application preset opens the following displays Signal Quality Shows a summary of modulation quality measurements EVM rho Magnitude Error Phase Error and others Constellation Shows the I and Q information of the signal analyzed in an I vs Q format Symbol Table Shows the demodulated symbols of the signal To use the Modulation Analysis preset 1 Select File gt Application Presets gt Modulation Analysis Click OK 2 Setthe measurement frequency 3 Set the refer
123. ets the start value for the vertical axis Units are in degrees Y Axis Sets the Y axis scale to either Continuous or Modulo pi Continuous mode unwraps the phase Modulo pi mode maps the phase to values between pi and pi Reference Sets which time point in the analysis period is used as the zero phase value reference Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Sets the horizontal scaling in second division Offset Sets the start value for the time axis Autoscale Resets the scale of the horizontal axis to contain the complete trace 142 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Scale Tab Pulse Statistics Scale Tab Pulse Statistics The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency In effect these controls operate like pan and zoom controls Params Method Ponts 30e Prefs Scale 8 49 ns Er gpa des 1 Offset 4 63 us A dr Autoscale Trend v Autoscale Setting Description Vertical Controls the vertical position and scale of the trace display Scale Changes the vertical scale The units for this setting depend on the statistic selected from the Result drop down list in the
124. etting provides three color schemes for the measurement graphs The color scheme setting does not change the overall instrument application or Windows color scheme Thunderstorm This scheme displays graphs in shades of blue This provides a less vibrant color scheme than the default setting Blizzard This scheme displays graphs with a white background to save ink when printing Classic The default setting This scheme displays the graph area with a black background Window Menu The Window menu provides control of how windows are displayed Command Description Close View Closes the selected view Cascade Positions windows in a cascade view not available when Lock Windows is selected Tile Horizontally Positions widows in a horizontal orientation top to bottom Tile Vertically Positions widows in a vertical orientation side by side Lock Windows Locks the windows into their current position preventing them from being moved List of windows A numbered list of open windows Help Menu The Help menu provides access to the online help and version information about the vector signal analyzer software SignalVu Vector Signal Analysis Software Printable Online Help T9 Reference Settings Command Description User manual Displays the online help About Tektronix Vector Signal Displays information about the vector signal analyzer software and installed options Analysis S
125. ettings 89 Rho measurement 138 Ripple measurement 138 calculation 138 Rise Time measurement 138 RMS Frequency Error measurement 139 RMS Phase Error Measurement 139 Run 75 Run menu 75 S Save and Export tab 78 saved file types 9 saving acquisition data 9 application presets 70 pictures 9 results 9 setups 9 Saving and Recalling Data 9 SignalVu Vector Signal Analysis Software Printable Online Help Index Scale tab 140 Amplitude vs Time display 139 Frequency vs Time display 140 Phase Error vs Time display 141 Phase vs Time display 142 Pulse Statistics display 143 Pulse Trace display 143 RF amp Q vs Time display 144 RF Measurements 145 Spectrogram display 146 Spectrum display 147 Spurious display 147 Time Overview display 148 Scope Data tab 149 Scope Settings tab 149 Search 106 Search control panel 94 Search For 107 Search In 107 search using a mask 107 secondary marker 178 Security tab 78 Selected display is swept 105 selecting the input 5 sensitivity 178 settings Constellation display 84 EVM vs Time display 84 Frequency vs Time 85 Magnitude Error vs Time 85 MCPR 86 Occupied Bandwidth 86 Options 78 Phase Error vs Time 87 Phase vs Time 87 Pulse Statistics display 88 Pulse Table display 88 Pulse Trace display 88 restoring defaults 89 RF amp Q vs Time 89 Signal Quality 90 Spectrogram display 91 Spectrum display 90 Spurious disp
126. ettings button This displays the control panel for MCPR the tab displayed will be the tab displayed the last time the Settings panel was opened MCPR Settings Freq amp RBW Measurement Params Channel Scale Prefs Main Channels Ad Cha Chan BW set Inactive a Offse Number 4 MI Add Mi 3 84 MHz 7 5 MHz n M2 3 84 MHz 2 5 MHz M2 M3 3 84 MHz 2 5 MHz BW 13 04 MH M3 M4 23 84 MHz 7 5 MHz M4 Al 3 84 MHz 1 Spacing 5 MHz A2 3 84 MHz 1 6 Click on the Channels tab To set the number of Main channels enter the number of Main channels in the Number text entry box under Main Channels NOTE As you add channels the span of the display will be adjusted so that all the channels can be seen 7 To set the bandwidth of all main channels enter a value in the BW value box 8 To set the spacing between the main channels enter a value in the Spacing value box 9 To prevent a main channel power level from being included in the Power Reference Total calculation select the channel to be excluded in the Inactive box 10 To add adjacent channels click the Add button under Adj Chans 32 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements MCPR Multiple Carrier Power Ratio Display JE Edit Channel Parameters E BR Frequency Offset l 5 MHz Settings for 2 Bandwidth A1 3 84 MHz 11 To edit Frequency Offset or Bandwidth click within the value box and use the f
127. finished making changes Channel Power 104 The total RF power in the selected frequency band The detection type used for measuring channel power is Average This means that the average of the linear pre log samples is used to determine the channel power To measure channel power use the ACLR measurement and set the number of adjacent channels to zero This results in only the channel power being measured SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Common Information Messages Common Information Messages The following table lists some of the common information messages that might appear during normal operation Message Explanation and recommended action Acq BW too small The display needs a wider acquisition bandwidth than what the current data record contains This can be due to several reasons The sampling parameters are being manually controlled In the Acquire control panel gt Sampling Parameters tab set the Adjust control to All Auto to allow the software to pick the sample rate and record length that it needs The impacted measurement is not the selected display The selected display has requested a smaller acquisition bandwidth to possibly achieve a better dynamic range Select the display that contains the message and click Run if the instrument is not already acquiring data Acquisitions are not running and the measurement now requests a wider bandwidth t
128. graph plots changes in frequency over time and allows you to make marker measurements of settling times frequency hops and other frequency transients B Spectrum Shows a spectrum view of the signal The only trace showing in the Spectrum graph after selecting the Time Frequency Analysis preset is the Spectrogram trace This is the trace from the Spectrogram display that is selected by the active marker Stop acquisitions with the Run button because its easier to work with stable results In the Spectrogram display move a marker up or down to see the spectrum trace at various points in time The analysis period is set to 5 ms To use the Time Frequency application preset 1 Select File gt Application Presets gt Time Frequency Analysis Click OK 2 When the preset s displays and settings have all been recalled and acquisitions are running adjust the center frequency and span to capture the signal of interest 3 Set the Reference Level to place the peak of the signal approximately 0 10 dB down from the top of the Spectrum graph 4 If the signal is transient in nature you might need to set a trigger to capture it You will need to use the oscilloscope triggering functions to capture the signal When the signal has been captured the spectrogram shows an overview of frequency and amplitude changes over time To see frequency transients in greater detail use the Frequency vs Time display The Time Frequency Analysis preset sets the an
129. h that of the industry s widest bandwidth digital oscilloscopes designers can now evaluate complex signals up to 20 GHz without the need of an external down converter You get the functionality of a vector signal analyzer a spectrum analyzer and the powerful trigger capabilities of a digital oscilloscope all in a single package Whether your design validation needs include wideband radar high data rate satellite links or frequency hopping communications SignalVu vector signal analysis software can speed your time to insight by showing you time variant behavior of these wideband signals Key Features Tightly integrated software and hardware control allows you to easily switch between SignalVu and oscilloscope user interfaces to optimize triggers and other acquisition parameters Key features of SignalVu include B Direct observation of microwave signals to 20 GHz without an external down converter m Allsignals up to the analog bandwidth of oscilloscope are captured in memory E Customizable oscilloscope acquisition parameters for effective use of capture memory Four channel acquisitions help you correlate independent RF events Apply custom math and filtering to acquisition channels B Extensive time correlated multi domain displays connect problems in time frequency phase and amplitude for quicker understanding of cause and effect when troubleshooting B Power measurements and signal statistics help you characterize components and systems
130. han the last acquisition Click Run to perform a new acquisition at a wider bandwidth The data is from a recalled TIQ file There is no way to increase the acquisition bandwidth for saved IQ data You must adjust the measurement settings so that less bandwidth is required The data is from a recalled oscilloscope waveform file Set all measurement parameters as required and then repeat the oscilloscope waveform file recall The oscilloscope acquisition parameters aren t under the control of the SignalVu software Display the Acquire gt Scope Settings control panel Check the boxes for Sample Rate and Other acquisition hardware settings Also verify that the IQ Sampling Params Adjust control is set to All Auto Selected display is swept RBW min nnnkHz When any display requires a swept acquisition the other displays are unable to process the swept data This is because the swept data is customized for the selected display Select the display that you are interested in and it will change the acquisition to meet its own needs The current Spectrum Length or Analysis Length is not long enough to allow a narrower RBW filter RBW Min is the narrowest allowable RBW for the current analysis length of the spectrum If the Length control is set to Manual try setting it to Auto so that the Analysis Length will increase to the required value SignalVu Vector Signal Analysis Software Printable Online Help 105 Reference
131. he EVM vs Time icon in the Available Displays box This adds the EVM vs Time icon to the Selected displays box 4 Click the OK button This displays the EVM vs Time view Elements of the EVM vs Time Display F e View Run Maiers Setup Took Window Hep 2x Tg aca Lane Freq 1 00000 Gie RefLev 0 00 dim serol Rentar Run m Item Display element Description 1 Top of graph adjustment Use the knob to adjust the vertical scale 2 Offset Adjusts the vertical position 3 Autoscale Adjusts the Horizontal and Vertical scale to show the entire trace 4 Peak and RMS value readout Shows the maximum result the time it occurred and the RMS of the result over the entire analysis length 9 Scale Sets the length of time shown in the graph Changing the EVM vs Time Display Settings see page 84 Magnitude Error vs Time Display The Magnitude Error displays the magnitude of the symbol error The amplitude appears on the vertical axis while time is plotted along the horizontal axis NOTE A maximum of 80 000 samples can be analyzed To display Magnitude Error vs Time SignalVu Vector Signal Analysis Software Printable Online Help 23 Taking Measurements Magnitude Error vs Time Display 1 Select the Displays button or Setup gt Displays This displays the Select Displays dialog 2 Select GP Digital Modulation in the Folders box 3 Double click the Mag Error vs Time icon or
132. he carrier frequency Ampl Abs The absolute amplitude of the spur Ampl Rel The relative amplitude at which the spur occurs The relative amplitude is the difference between the absolute amplitude and the carrier amplitude See the Settings gt Limits tab Lim Abs The value of the absolute amplitude limit at the spur frequency This value can vary even with small spur frequency changes if the start and stop limit values are different See the Settings gt Limits tab see page 119 Lim Rel The relative amplitude limit at which the spur occurs This value can vary even with small spur frequency changes if the start and stop relative amplitude limit values are different See the Settings gt Limits tab see page 119 Blue background Red background The cell in the Spur column with a blue background identifies the selected spur Cells in the Spur column with a red background identify violations Cells in the results area with a red background identify the measurement that exceeded a limit Rearranging the Columns in the Spur Table You can rearrange the order of the columns in the Spur Table To move a column click on the column heading and drag it to the desired position Sorting the Rows in the Spur Table You can sort the rows in the Spur table by clicking on the column heading For example if you click on the Freq Abs heading the results in the Spur table will be sorted by frequency If you click on Range the rows will
133. he nnne 125 Online Help 2 55 eode E A A 126 Parameters Tab CCDF Display mrna o dad 126 Parameters Tab Occupied BW 0oooococcconccconccnnonnnconcrnoncon nr ron EE messem eene enne 127 Parameters Tab Spurious coi os iste es E REED a ad 127 Params Tab Pulsed RF erroe rtr de Rakete e er oe Eee dd e E a a de Rebs 128 Peak Markers Menu 0 ccc cece eee eme ee eme he e esee esse e e serene 129 Peak Average Ratio Pk Avg Measurement CCDF Display sss 129 Peak Power Measurement Pulsed RF Display sss meme 129 Phase Deviation Measurement 5 i 130 Phase Error Measurement isses ee mesh messe e ese he eene nnne 130 Prefs Tab cM 130 Prefs Tab Spectrum A at 130 Prefs Tab SpuriOls A ESERE TERA UT KERSA EO Ee E EAA 131 Pulse to Pulse Frequency DIfferenCe ooooocooocconcoonnconcononccnnrnnnronnr messe messe nennen 131 Pulse to Pulse Carrier Phase Measurement isses ene mener 132 Pulse Width Measurement iiss en eret A ead rp peus EE AE ES 132 Quadrature Error Measurement ssssssssssssssssssssssesssse ness rr e hes nas 132 Ranges Tab Spurious A REC REA SEET OE SEC EE I RE RES 132 Reference Tab Spurious 5 deos SEP A A a 134 Repeats A O ea nd OSES 137 Repetition Interval Measurement ccc cece cee enn ese he messe messe nenne 137 Repetition Rate Measurement 6 ren kooren i een enn eme see he he ese ehe enne 137 RF Channel Power Measurement
134. hown Restoring Default Settings To restore the instrument to its factory default settings Select File gt Preset to return the analyzer to its default settings Preset resets all settings and clears all acquisition data Settings and acquisition data that have not been saved will be lost RF amp Q vs Time Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for RF I amp Q vs Time are shown in the following table Settings tab Description Freq amp Span see page 115 Sets the frequency and span parameters Trace see page 156 Sets the trace display parameters Scale see page 140 Sets the Vertical and Horizontal scale and offset parameters Prefs see page 130 Specifies whether certain display elements are visible Search Limits Testing Settings Menu Bar Tools gt Search Selecting Search displays the Search control panel These settings define search parameters and specify actions to be performed when the search condition is met SignalVu Vector Signal Analysis Software Printable Online Help 89 Reference Enable Y Search Setting Signal Quality Settings Search in Spectrurre Trace 1 v Search for greater thar v 10 00 d8r Description Enable Search Select to perform a search Define see page 106 Specifies which trace to search and what to search for Actions see page 94 Specifies th
135. ht edge of the graph This value does not change the frequencies of the ranges Autoscale Resets the Start and Stop frequencies to the lowest and highest values of the enabled ranges Reset Scale Resets all settings to their default values Scale Tab Time Overview The Scale tab allows you to change the vertical scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency In effect these controls operate like pan and zoom controls Scale Prefs Scale 100 dB Scale 10 000 ns Offset 0 000 dB Reset Scale Offset 0 000 s Setting Description Vertical Controls the vertical position and scale of the trace display Scale Changes the vertical scale Offset Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the scale of the trace display and position of the trace Scale Allows you to change length of time shown within the graph Offset Allows you to pan the graph Autoscale Resets the scale of the horizontal axis to contain the analysis length Reset Scale Resets all settings to their default values 148 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Scope Data Scope Data The Scope Data tab displays the sample rate and record length of the data r
136. ical cases and is equal to 1 for a perfect signal measured in a perfect receiver Changing the Signal Quality Display Settings see page 90 Symbol Table Display The Symbol Table Display is like the Constellation Display except that a text table is used to display data bits at a symbol rather than a graph The Synch Word characters if used are in bold font To display the Symbol Table 1 Select the Displays button or select Setup gt Displays This displays the Select Displays dialog 2 From the Folders box select GP Digital Modulation 3 Double click the Symbol Table icon in the Available Displays box This adds the Symbol Table icon to the Selected displays box 4 Click the OK button This displays the Symbol Table view SignalVu Vector Signal Analysis Software Printable Online Help 27 Taking Measurements CCDF Display Tek RSA6100A Symbol Table B Me vew Run Mekes Se p Tools Window Hep Depbys merces Senasa Acq la Freq 1 48800 GHz Marker M1 Symbol 33 Time 33 00 Sym Value 10 Aca BW 20 00 MHz Aco Length 116 480 us Real Time Free Run Ref Int Atten 25 dB Using Markers Markers are indicators in the display that you can position on a trace to measure values such as frequency power and time A Marker always displays its position and if the Delta readout is enabled will display the difference between its position and that of the Marker Reference Within the Symbol Table colored
137. ies how many traces averaged Min Hold Displays the minimum value in the trace record for each display point Each new trace display point is compared to the previous minimum value and the lesser value is retained for display and subsequent comparisons Max Hold Displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Saving Traces To save a trace for later analysis 156 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Trace Tab RF I amp Q vs Time 1 Select the Save Trace As button This displays the Save As dialog box Save in O Screen Captures Bom Name Sze Type fjMuspesk i 48240GHr 1 dox 397KB DPX Fle 2 Type a name for the saved trace and click Save Recalling Traces You can recall a previously saved trace for analysis or comparison to a live trace To select a trace for recall 1 Select the trace into which the recalled trace will be loaded from the Trace drop down list 2 Check the Show checkbox 3 Click the button to display the Open dialog box Show recalled trace J 4 Navigate to the desired file and click Open 5 Check the Show Recalled Trace checkbox 6 Verify that the trace s Show checkbox is selected either on this tab or next to the drop down list located at the top left corner of
138. igher absolute Moves the selected marker to the higher level peak in absolute terms on the trace SignalVu Vector Signal Analysis Software Printable Online Help 125 Reference Topics Online Help Online Help Menu Bar Help gt User Manual This menu item displays this online help The online help is a standard Windows help system The Online Help menu item is the only method available to display the online help there are no other links to the online help within the software Parameters Tab CCDF Display 126 The Parameters tab enables you to specify several parameters that control signal acquisition for the CCDF Display Measurement Time Single use Analysis Length Total Time Span 640 kHz Continuous Setting Description Single When this Single is selected the CCDF measurement is based on the Analysis Time parameters set on Analysis control panel Setup gt Analysis gt Analysis Time Total Time When Total Time is selected you can adjust its value The value set here does not affect Analysis Length value set in the Analysis control panel Continuous When Continuous is selected the CCDF measurement combines each new record Actual Analysis Length into the existing result It does not erase and start over until user presses STOP or CLEAR Span Specifies the range of frequencies used for analysis Single Depending on the Analysis Time setting the CCDF display may present error messages m
139. ignal Analysis Software Printable Online Help 177 Glossary Secondary Marker Secondary Marker The second marker displayed only in the Delta Marker mode Sensitivity Measure of a analyzer s ability to display minimum level signals usually expressed as displayed average noise level DANL see page 169 Shape Factor Skirt Selectivity The ratio of the frequency separation of the two 60 dB 3 dB down points on the response curve to the static resolution bandwidth Signal As used in this online help the signal refers to the input signal before it is processed The signal is an input Span Span is the range of frequencies displayed in a spectrum window Span start frequency and stop frequency are related by the following equation Span stop frequency start frequency The settings for center start and stop frequencies are related to the setting for span when one parameter is changed the other are changed automatically Span per Division Span Div Frequency difference represented by each major horizontal division of the graticule 178 SignalVu Vector Signal Analysis Software Printable Online Help Glossary Spectrogram Spectrogram Frequency vs time vs amplitude display where the frequency is represented on the x axis and time on the y axis The power level is indicated by variations in color Spectrum The frequency domain representation of a signal showing the power distribution of its spectral
140. in the Spectrum display This line is attached to the selected marker 12 Overlap Shows what portions of its time period a given line shares with previous or later lines The Spectrogram can show results from one or multiple acquisitions and it can show one or multiple lines for each acquisition Changing the Spectrogram Display Settings see page 91 SignalVu Vector Signal Analysis Software Printable Online Help 17 Taking Measurements Spectrum Display Spectrum Display To display a spectrum 1 Click the Displays button or select Setup gt Displays 2 From the Folders box select General Signal Viewing 3 Double click the Spectrum icon in the Available displays box This adds the Spectrum icon to the Selected displays box and removes it from the Available displays box Alternately you can click the Spectrum icon and then click the Add button to select Spectrum for display 4 Click the OK button Elements of the Spectrum Display _ ax 2 RefLev 0 00 dBm 0 Position 9 10077 GHz Scale 40 00 MHz 0070 007 18 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Time Overview Item Display element Description 1 Vert Offset Sets the top of graph value This is only a visual control for panning the graph The Reference Level is adjusted in the Toolbar By default Vert Offset Ref Level 2 dB div Sets the vertical scale value The maximum v
141. indow that you can move over the acquisition record by adjusting the offset 8 Spectrum Length and Offset This red line indicates the Spectrum Length and Offset The longer the time Indicator the longer the bar Adjusting the offset shifts the bar left or right 9 Actual length display Displays the actual time for the selected value If the user adjusted length extends past the end of the acquisition record the realizable analysis length is less than requested 10 Analysis Length and Offset This blue line indicates the Analysis Length and Offset The longer the time Indicator the longer the bar Adjusting the offset shifts the bar left or right 11 Setting Adjustment box Click in this box to adjust the value selected by the Analysis Time Control buttons NOTE The area with black background not gray in the Amplitude vs Time Graph highlights the control selected in the Analysis Time Control drop down list Changing the Time Overview Display Settings see page 92 Constellation Display The Constellation Display shows a digitally modulated signal in constellation form NOTE A maximum of 80 000 samples can be analyzed To show the Constellation Display 1 Select the Displays button or select Setup gt Displays This shows the Select Displays dialog SignalVu Vector Signal Analysis Software Printable Online Help 21 Taking Measurements EVM vs Time Display 2 From the Folders box select GP Digital Modulation
142. ine Adj Chans Add Opens the Edit Channel Parameters dialog which you use to specify the parameters of a new pair of adjacent channels You can add up to 50 adjacent channel pairs Edit Opens the Edit Channel Parameters dialog You must first select a channel to enable the Edit button Delete Deletes the selected main channel or adjacent channel pair Add Adj Add a new pair of adjacent channels at the bottom Their parameters are copied from the channels just above them Channel Definition table A table of the parameters for every channel Offset is the frequency difference between the Center Frequency and center of the selected channel Nothing in the table is editable directly The following figure illustrates the settings controlled from the Channels tab Lower Adjacent 1 Main 1 Adj Chan Main Chan Main Chan Main Chan Adj Chan Bandwidth Bandwidth Bandwidth Bandwidth Bandwidth Main 2 Upper Main 3 Adjacent 1 Channel Spacing Channel Spacing e Limo gt Channel Spacing Channel Spacing gt gt Editing Channel Parameters To edit the offset or bandwidth of a Main channel 1 Select the value in the BW or Spacing number entry boxes Adjust the value as required All the Main channels share the same BW and Spacing 2 3 Select the appropriate checkbox to make a channel Inactive as appropriate 4 Select the Close box when you hav
143. ist that allows you to set the color scheme used for the spectrogram trace Max Sets the maximum power level represented by the top of the color scale Min Sets the minimum power level represented by the bottom of the color scale Vertical Scale The Spectrogram display allows you to zoom in and out in the time scale Positive values zoom in expand the scale and negative values zoom out compress the scale If the Scale control does not allow positive values either the Analysis Length Setup gt Analysis gt Analysis Time provides only enough time for a single spectrogram line manually increase the Analysis Length as needed or Allow Overlap is disabled 146 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Scale Tab Spectrum Scale Tab Spectrum The Scale tab allows you to change the vertical scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency In effect these controls operate like pan and zoom controls Freq 4 Span BY Traces gt lt a Prof vertica Horzonta Scale 100 00 dB Scale 13 90 GHz Position 0 00 dBm Reset Scale Position 7 05 GHz RENS Ctog _Autoscal Setting Description Vertical Scale Changes the vertical scale Position Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the Offset so that the trace appears
144. itude limits are not based on the measured carrier amplitude or manual reference Start and stop values can be different Start Specifies the limit at the start frequency of the range Stop Specifies the limit at the stop frequency of the range Same Sets the limit at the start and stop frequencies to the value set for the start frequency Relative ampl Relative amplitude limits are calculated from the Power Reference If the Power Reference is set to the Carrier level the relative amplitude limits will change with the carrier level Start and stop values can be different Start Specifies the limit at the start frequency of the range Stop Specifies the limit at the stop frequency of the range Same Sets the limit at the stop frequency to the value set for the start frequency Review table Click to display the Ranges table The Ranges Table shows the enabled ranges and all the settings specified on the Ranges and Limits tabs associated with the enabled ranges Save table Click to save the current Range table to a file Load table Click to load a saved Range table from a file 120 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Magnitude Error Measurement Performing Pass Fail Limit Testing To set limits Press Settings to display the Spurious Settings panel Press Limits to display the Limits tab Press Edit to display the Range and Carrier Frequencies dialog box Adjust the start a
145. l to be equal to or less than the Max trace points setting except when Max trace points is set to Never Decimate This decimated or undecimated trace is what is used for marker measurements and for results export You can set the Max trace points on the Settings gt Prefs tab To display an RF I amp Q vs Time display 1 2 3 Select the Displays button or select Setup gt Displays This shows the Select Displays dialog From the Folders box select General Signal Viewing Double click the RF I amp Q vs Time icon in the Available Displays box This adds the RF I amp Q vs Time icon to the Selected displays box Click the OK button Elements of the Display SignalVu Vector Signal Analysis Software Printable Online Help 15 Taking Measurements Spectrogram Display Item Display element Description 1 Top of Graph adjustment Use the knob to adjust the vertical scaling 2 Vertical offset adjustment Adjusts the level shown at the center of the display 3 Autoscale button Adjusts the offset and scale for both vertical and horizontal to provide the best display 4 Maximum and Minimum level Displays the maximum and minimum values within the Analysis Time as well readouts as the times at which they occurred 5 Scale Sets the time spanned by the graph 6 Clear button Restarts multi trace functions Avg Hold 7 Trace function Displays the current trace function setting Settings gt Trace gt Fu
146. lay 91 Symbol Table display 92 Time Overview display 92 Settings 80 Setup Menu 77 183 Index setups saving 9 shape factor skirt selectivity 178 Show Marker Readout in Graph 130 Show Pulse Definition 150 Show recalled trace 151 signal 178 Signal Quality display 26 Signal Quality settings 90 Single 76 span 178 span per division 178 Span RBW Ratio 98 spectrogram 179 Spectrogram display 16 Spectrogram display settings 91 Spectrogram trace 162 spectrum 179 spectrum analysis 179 spectrum analyzer 179 Spectrum display 18 Spectrum display settings 90 spectrum time 179 Spectrum Time tab 150 spur 179 Spurious 37 Spurious display settings 91 184 spurious response 180 Status Bar 74 Symbol Table display 27 Symbol Table display settings 92 T Time measurement 150 Time Overview 19 Time Overview display settings 92 time reference 180 Tools Menu 78 Touch screen Actions 51 trace 180 Trace tab Constellation display 151 Frequency vs Time display 151 RF amp Q vs Time display 156 Spectrogram display 153 Spurious display 155 Traces tab Amplitude vs Time display 159 CCDF display 158 Error vs Time display 161 Math Trace 162 Spectrum display 162 Transform Window 98 U Uniform FFT window 98 Units tab 165 V VBW 18 vector signal analyzer 180 vertical scale factor vertical display factor 180 Vertical tab Acquire control panel 165 View
147. le of the trace display Scale Changes the vertical scale units This is only accessible when the vertical units are set to dBm Offset Adjusts the Reference Level away from the top of the trace display Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Allows you to change the span Offset Allows you to pan a zoomed trace without changing the Measurement Frequency Autoscale Resets the scale of the horizontal axis to contain the complete trace Full Scale Specifies the Horizontal scale default Selected Pulse Sets the horizontal scale default to be based on the result value for the currently select pulse Max Pulse Sets the horizontal scale default to be based on the largest value for the selected pulse measurement Reset Scale Resets all values to their default values Scale Tab RF amp Q vs Time The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency Freg amp Span Trace Scale Prefs Scale 990 m Offset 0 000 V Autoscale 144 Scale 62 500 us Offset 0 000 s Autoscale SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Scale Tab RF Measurements Setting Description Ver
148. level Measurement BW enable averaging and the Max Hold function Scale see page 141 Allows you to set the vertical and horizontal scale parameters Prefs see page 130 The Prefs tab enables you to set characteristics of the measurement display Phase Error vs Time Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Phase Error vs Time display are shown in the following table Settings tab Modulation see page 123 Description Allows you to specify the type of modulation used for the input signal and other parameters Advanced Params see Allows you to specify the frequency offset magnitude normalization method and allows page 95 for swapping the and Q signals Find see page 113 Find tab is used to set parameters for finding bursts within the data record Analysis Time see page 97 The Analysis Time tab contains parameters that define the portion of the acquisition record that is used for analysis Traces see page 161 Allows you to set the points symbol and enable trace averaging Scale see page 141 Allows you to set the vertical and horizontal scale parameters Prefs see page 130 The Prefs tab enables you to set characteristics of the measurement display Phase vs Time Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Phase vs Time displa
149. ltiple Access Center Frequency The frequency corresponding to the center of a frequency span of the analyzer display Check Mark Indicator The check mark indicator in the upper left corner of the display indicates the display for which the acquisition hardware is optimized When you have more than one display open the display with the check mark indicator has control over the acquisition hardware To give a display priority over any others click its title bar CISPR International special committee on radio interference Comit international sp cial des perturbations radio lectriques CW Acronym for Continuous Wave CW Signal Continuous wave signal a sine wave DANL Acronym for Displayed Average Noise Level See Sensitivity see page 178 SignalVu Vector Signal Analysis Software Printable Online Help 169 Glossary dB s dBfs A unit to express power level in decibels referenced to full scale Depending on the context this is either the full scale of the display screen or the full scale of the analog to digital converter ADC dBm A unit of expressed power level in decibels referenced to 1 milliwatt dBmV A unit to express voltage levels in decibels referenced to 1 millivolt dBuV A unit to express voltage levels in decibels referenced to 1 microvolt Decibel Ten times the logarithm of the ratio of one electrical power to another Display Reference Level A designated vertical positio
150. lysis Software Printable Online Help Reference Topics Ranges Tab Spurious Setting Description Range Selects the frequency range to which the settings on this tab are applied Start Readout of the start frequency for the selected range Stop Readout of the stop frequency for the selected range Edit Click this button to edit the Spurious Frequency Plan which defines the range frequency values and whether or not a signal is measured in a range enabled disabled Enabled Specifies whether or not measurements are taken in the specified range Filter shape Specifies the filter shape used for the Spurious measurement BW Specifies the bandwidth used for the selected filter shape Auto Sets the BW automatically If CISPR is selected for Filter shape this control is disabled Detection Sets the processing method used for compressing excess intermediate data into the desired number of trace points Threshold Specifies the level that must be exceeded for a signal peak to be recognized as a spur A signal peak must also exceed the Excursion setting to be considered a spur Excursion Specifies the peak to peak magnitude that must be exceeded for a signal peak to be recognized as a spur A signal transition must also exceed the Threshold setting to be considered a spur VBW Adjusts the VBW Video Bandwidth value VBW Maximum RBW current value VBW Minimum 1 10 000 RBW setting Disabled when Filter shape is se
151. lysis later or as Acquisition data with setup or data to use with external software Acquisition data export CSV or MAT either CSV comma separated value or MAT MATLAB format Saving Files Saving files follows the same procedure regardless of the type of data being saved To save setups including application presets pictures results or acquisition data 1 Select Save As from the File menu to open the Save As dialog box 2 Navigate to the folder where you want to save the setups or use the default location To save setups so that they appear in the Application Presets window save your setup in the folder C SignalVu Application Presets The saved setup will appear in the Application Presets window with the name you give the file 3 Enter a file name 4 Select the type of file to save from the Save as type drop down list 5 Click Save SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Saving and Recalling Data Recalling Files You can recall three types of files Setup files Selected Trace and Acquisition data with setup Recalling data follows the same procedure regardless of the type of data being recalled 1 Select Recall from the File menu to open the Open dialog box 2 Navigate to the folder containing the file you want to recall 3 Select the type of file to recall from the Files of type drop down list This selection determines the files that appear in th
152. lyze This can happen if m The Analysis Length is set too short Increase the Analysis Length see page 97 B The Analysis Offset has pushed the Analysis Time so far out that the actual Analysis Length is too short even though the user requested Analysis Length would have been long enough without the excessive offset Decrease the Analysis Offset see page 97 m The input signal is bursted and the burst does not contain enough symbols Needs swept acq or larger Acq BW Acquire data while display is selected The display has one of two problems It is not the selected display which prevents it from controlling the hardware acquisition parameters and setting the acquisition mode to Swept or its settings require a wider data bandwidth Select the display that you are interested in and it will change the acquisition to meet its own needs B Increase the acquisition bandwidth manually or by changing the selected display s settings to cause the wider bandwidth No Math trace unmatched trace lengths A math trace could not produced because the traces selected to generate the math trace do not have the same number of points This can easily happen if both traces are recalled but were saved under different Points settings This can also occur if one of the selected traces is a live trace and the other trace is a recalled trace Ina Spectrum display as long as one trace is live you can change the Points setting Setup
153. n Noise Mode dBc Hz represents dBm Hz referenced to a carrier Here it is assumed that the carrier is a CW signal and its signal level does not change when the RBW is changed so the Reference Marker measurement on the carrier is unchanged from any other marker measurement However the delta marker values are converted to dBm Hz and then a difference value in dBc Hz is calculated between each delta measurement and the reference Measuring Noise To measure noise on a Spectrum trace 1 2 Ed wow gt 12 13 14 15 16 Select Markers gt Define to display the Markers control panel Click Add The first marker defined is always designated the Marker Reference Subsequently defined markers are designated as Delta Markers you can also select and adjust markers by clicking on an existing marker in the display Click Add again so that there are at least two markers defined Check that Readouts is set to Delta If you have more than one trace defined use the drop down list for each marker to set it to the trace on which you want to measure noise Select the Settings button to display the Spectrum settings control panel Click the Prefs tab Click the Marker Noise Mode check box so it is checked Click the Traces tab Verify that Detection is set to Average for the trace you are using for this measurement 11 Click the Ana Analysis button Select the Units tab Select dBm for the Amplitude units Cli
154. n representing a specified input level The level may be expressed in dBm volts or any other units Distortion Degradation of a signal often a result of nonlinear operations resulting in unwanted signal components Harmonic and intermodulation distortion are common types 170 SignalVu Vector Signal Analysis Software Printable Online Help Glossary Dynamic Range Dynamic Range The maximum ratio of the levels of two signals simultaneously present at the input which can be measured to a specified accuracy EVM Acronym for Error Vector Magnitude Export Save data to a file in a format other than application native FastFrame FastFrame segments the acquisition record into a series of frames and then captures acquisitions as single frames You can then view and measure each frame individually FFT Fast Fourier Transform a mathematical process to calculate the frequency spectrum of a discrete number of time domain sample points Filter A circuit that separates electrical signals or signal components based on their frequencies FM Acronym for Frequency Modulation SignalVu Vector Signal Analysis Software Printable Online Help 171 Glossary Frame Frame A series of time contiguous samples long enough in duration and at a sufficient sample rate to produce a spectrum view of a specified span and RBW Frequency A series of time contiguous samples long enough in duration and at a sufficient sample rate to pr
155. n the graph 4 Trace function readout Displays either Normal or MaxHold to indicate trace function 5 Clear Resets count for Average and MaxHold functions Enabled only when Averaging or MaxHold is enabled Pressing Clear will clear the trace and if acquisition is running restart the averaging or hold process 6 Graph Displays the input signal Shaded areas indicate the measurement bandwidth Settings gt Parameters tab gt Measurement BW 7 Blue lines The blue lines indicate where the selected results selected in the Main results area are being measured on the trace 8 Grid divider Determines the portion of the display allocated to the graph and detailed results area You can move the grid divider all the way to the top or bottom and any position in between 9 Detailed results area Displays additional measurements results 10 Position and dB div Position sets the top of graph value The dB div setting is the vertical scale value 1i Main results area Displays results for Occupied Bandwidth OBW and x dB bandwidth Use the two radio buttons to select which of the two results are illustrated in the graph with the blue lines and arrows There are also controls for adjusting OBW Power x dB BW Level and RBW 12 VBW Enables the VBW Video Bandwidth filter Displays current VBW filter setting See Setup gt Settings gt Freq amp RBW tab see page 114 Detailed Results Readouts Measurement Description Freq Error The fr
156. nal Analysis Software Printable Online Help 173 Glossary Input Impedance Input Impedance The impedance at the desired input terminal Usually expressed in terms of VSWR return loss or other related terms for low impedance devices and resistance capacitance parameters for high impedance devices LISN Acronym for Line Impedance Stabilization Network Local Oscillator LO An oscillator which produces the internal signal that is mixed with an incoming signal to produce the IF signal Marker A visually identifiable point on a waveform trace used to extract a readout of domain and range values represented by that point Max Hold Digitally stored display mode which at each frequency address compares the incoming signal level to the stored level and retains the greater level In this mode the display indicates the peak level at each frequency after several successive acquisitions MCPR Multiple Carrier Power Ratio The ratio of the signal power in the reference channel or group of channel to the power in adjacent channels 174 SignalVu Vector Signal Analysis Software Printable Online Help Glossary Min Hold Min Hold Digitally stored display mode which at each frequency address compares the incoming signal level to the stored level and retains the lower level In this mode the display indicates the minimum level at each frequency after several successive sweeps Modulate To regulate or vary a characteristic of
157. nalysis Software Printable Online Help Taking Measurements Phase Error vs Time Display Phase Error vs Time Display The Phase Error vs Time display shows the phase angle of the symbol error over time The phase is plotted along the vertical axis while time is plotted along the horizontal axis NOTE A maximum of 80 000 samples can be analyzed To show the Phase Error display 1 Press the Displays button or select Setup gt Displays 2 In the Select Displays dialog select GP Digital Modulation in the Folders box 3 In the Available displays box double click the Phase Error icon or select the icon and click Add The Phase Error icon will appear in the Selected displays box and will no longer appear under Available displays 4 Click OK to display the Phase Error Elements of the Display Tek RSA61004 Phase Error vs Time Setup Toss Window Help ng f Aco ff ara freq 1 00000 GHe RefLev 0 00 dam zeroi Replay Run SignalVu Vector Signal Analysis Software Printable Online Help 25 Taking Measurements Signal Quality Display Item Display element Description 1 Freq Error Freq Error is the difference between the Center Frequency and the measured frequency of the signal being tested This readout will be Freq Offset if the Freq Offset parameter on the Settings Advanced Params see page 95 tab is set to Manual 2 Top of graph adjustment Adjusts the phase angle shown at the top
158. nction If the traces are averaged the number of averages is displayed 8 Trace Control Selects which trace is displayed using the drop down list and which trace is active click on the trace name to display a menu Changing the RF I amp Q vs Time Display Settings see page 89 Spectrogram Display The Spectrogram is a display with the vertical axis time composed of successive spectral displays each having the amplitude represented by color or intensity The horizontal axis represents frequency The most recently acquired spectrum results are added to the bottom of the spectrogram The addition of a new spectrum can occur at the fastest rate that new spectra can be plotted or if you choose new spectra can be added at a timed rate The spectrogram view is well suited to displaying long term trends of spectral data The maximum number of lines that can be displayed in a spectrogram 1s 125 000 NOTE Spectrogram data is shared with the Spectrum display To display a Spectrogram 1 2 3 16 Select the Displays button or select Setup gt Displays This displays the Select Displays dialog From the Folders box select General Signal Viewing Double click the Spectrogram icon in the Available Displays box This adds the Spectrogram icon to the Selected displays box Click the OK button This displays the spectrogram view SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements
159. nd stop frequencies as required for each range you want to test 1 2 3 4 5 For ranges that you wish to test verify that the Enabled box is checked Click OK 6 Select a range you want to test from the Range drop down list 7 Select the desired Mask type from the drop down list 8 Set the limits as desired in the Absolute ampl and Relative ampl boxes The values you can edit depend on the mask type you select 9 Repeat steps 5 6 and 7 for each range you want to test 10 Verify that the Threshold and Excursion values on the Ranges see page 132 tab are set as required These are the values that define a spur 11 Press the close box to remove the Settings panel 12 Click Run to begin testing Magnitude Error Measurement The RMS magnitude difference between the measured signal and the reference signal magnitude Marker to Center Frequency Changes the center frequency to match the frequency of the selected marker Maximum Frequency Error Measurement The maximum frequency error is the difference between the measured carrier frequency of the signal and the user selected center frequency of the analyzer SignalVu Vector Signal Analysis Software Printable Online Help 121 Reference Topics Maximum Phase Error Measurement Maximum Phase Error Measurement The phase is measured at each point during the pulse s ON time The phase error for each point is the difference between the measured phase value and the calculate
160. nt displays however they do not have to be tied together They are by default specified separately and used to analyze different parts of the acquisition record Elements of the Display Reltevin nn ares om o ELE Aresa Pili 9 009 2 20 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Constellation Display Item Element Description 1 Analysis Time Control Click a button to select the value to be adjusted In order the buttons represent Analysis Offset Analysis Length Spectrum Offset and Spectrum Length 2 Offset and Scale Adjusts the vertical scale and offset 3 Amplitude vs Time graph The trace represents the entire acquisition record at full horizontal scale The graph indicates the Analysis Length or Spectrum Length on the graph with a darker background 4 Autoscale button Resets the horizontal scale to display the entire acquisition record and the vertical scale to show all trace points 9 Horizontal Offset Adjusts the horizontal offset 6 Results Timeline This fuchsia line indicates the portion of the record actually used for calculating the selected result For example if a pulse measurement is selected it shows the period of the specific pulse For a constellation display it shows the points included in the demodulation 7 Horizontal Scale Adjusts the span of the graph By decreasing the scale the graph essentially becomes a w
161. oduce a spectrum view of a specified span and RBW Frequency Band The continuous range of frequencies extending between two limiting frequencies expressed in hertz Frequency Domain View The representation of the power of the spectral components of a signal as a function frequency the spectrum of the signal Frequency Drift Gradual shift or change in displayed frequency over the specified time due to internal changes in the analyzer where other conditions remain constant Expressed in hertz per second Frequency Mask Trigger A flexible real time trigger based on specific events that occur in the frequency domain Frequency Range The range of frequencies over which the performance of the instrument is specified 172 SignalVu Vector Signal Analysis Software Printable Online Help Glossary Frequency Span Frequency Span A continuous range of frequencies extending between two frequency limits GPIB Acronym for General Purpose Interface Bus the common name for the communications interface system defined in IEEE Std 488 Graticule The calibrated grid overlaying the display screen of analyzers oscilloscopes and other test instruments Grayed Out An on screen control is Grayed Out if it is not adjustable Q Acronym for In phase Quadrature Acronym for Intermediate Frequency Import Bring data into the application from a file of some format other than application native SignalVu Vector Sig
162. odulation of the signal Trace Modulation Advanced Params Find Analysis Time Doby Freq Offset Auto v I Swap land Q Mag Normalize Max Symbo Magntude wv Parameter Description Freq Offset Specifies the kind of offset used in some graphs Choices are Auto or Manual When Manual is selected a number entry box is enabled for entering the frequency offset value Frequency Offset Value Use to enter an offset frequency value This box is enabled only when Manual is selected for Freq Offset Mag Normalize Select RMS Symbol Magnitude or Max Symbol Magnitude This setting applies to Mag Error and EVM Swap I and Q When enabled the and Q data are exchanged before demodulating Freq Offset The Frequency Offset setting is used when the center frequency setting does not match the signal frequency When Auto is selected the analyzer measures the offset When Manual is selected a number entry box is available that enables you to set the needed frequency offset SignalVu Vector Signal Analysis Software Printable Online Help 95 Reference Topics Analysis Time Tab Analysis Control Panel Mag Normalize Specifies whether Magnitude Normalization uses the RMS Symbol Magnitude or the Maximum Symbol Magnitude as the basis for normalization Swap and Q Use this check box to swap the positions of the I and Q signals in the graph Analysis Time Tab Analysis Control Panel 96 The Analysis Time tab cont
163. of a pulse width to the pulse period 112 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics EVM Error Vector Magnitude Measurement EVM Error Vector Magnitude Measurement The normalized RMS value of the error vector between the measured signal and the ideal reference signal over the analysis length The EVM is generally measured on symbol or chip instants and can be reported in units of percent or dB EVM is usually measured after best fit estimates of the frequency error and a fixed phase offset have been removed These estimates are made over the analysis length Fall Time Measurement Pulsed RF Display The time required for a signal to fall from 9096 to 1096 of its maximum steady state amplitude Find Tab GP Digital Modulation The Find tab is used to set parameters for finding bursts within the data record This is a post acquisition operation Modulation Advanced Params fFnd Analyss Time Trace Scale Prefs Burst Detectio Cluse Synch Word Cear Mode Off v 8 12 Threshold 10 dBc 16 v Setting Description Burst Detection Mode Select whether to analyze bursts Auto If a burst is found analyze just that burst period If a burst is not found analyze the whole analysis length On If a burst is found analyze just that burst period If a burst is not found display an error message If the signal isn t adequate for demodulation an error message is shown Burst De
164. of adjacent pairs the analyzer will update the display to indicate the channel bandwidth 3 Select the Close box when you have finished making changes Channel Spacing 1 Select Channel Spacing number entry box 2 Enter a value for the difference in center frequency between channels using the knob or the keypad NOTE As you change the value for the number of adjacent pairs the analyzer will update the display to indicate the channel bandwidth 3 Select Close when you have finished making changes Channels Tab MCPR 102 Path Setup gt Settings gt Channels Application Toolbar Front Panel Settings The Channels tab is where you specify the parameters for the channels measured in the MCPR display MCPR Settings Frec Span amp REW Measurement Params Channels Scale Prefs Man Channels Adj Chans 2 Am Chan BW Offset Number 4 Mt Ade Mi 3 84 MHz 7 5 MH M2 3 84 MHz 2 5 MHz 0 wz M3 3 84 MHz 2 5 MHz BW 3 84 MHz M3 Eck J M4 3 84 MHz 7 5 MHz M4 Spacing 5 MH Delete A2 3 84 MHz 17 5 MHz Defauts SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Channels Tab MCPR Setting Description Main Channels Number Sets the number of Main channels BW Sets the bandwidth of the Main channels Spacing Sets the frequency difference between the centers of the Main channels Inactive Selected channels are ignored by the measurement rout
165. of the graph 3 Offset Adjusts the vertical offset 4 Autoscale Adjusts the vertical and horizontal settings so that the entire trace fits in the graph 5 Offset Adjusts the horizontal offset 6 Peak and RMS readouts Displays the Peak value of the phase error and the time at which it occurred Also displays the RMS value over the analysis length 7 Scale Sets the time spanned by the graph Changing the Phase Error vs Time Display Settings see page 87 Signal Quality Display 26 The Signal Quality display shows several measurements of signal quality Signal Quality RAS Peak EVM 0 307 Yo 1 298 Yo 48 246 dB 37 725 dB 0 184 0 705 0 216 o 0 959 o Loca 113 00 Sym 113 00 Sym 393 00 Sym Phase Error Mag Error MERIRMS IQ Origin Offset Gain Imbalance 0 999953 133 4 Hz a Ones 9 48 246 dB RRO 65 259 dB Frequency Error 0 008 dB Quadrature Error SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Elements of the Display Measurement Symbol Table Display Description EVM The normalized RMS value of the error vector between the measured signal and the ideal reference signal over the analysis length The EVM is generally measured on symbol or chip instants and is reported in units of percent and dB EVM is usually measured after best fit estimates of the frequency error and a fixed phase offset have been removed These estimates are made over
166. oftware Settings 80 Menu Bar Setup gt Settings The Settings menu item enables access to control panels that allow you to change settings for the selected display The control panel that appears when you select Settings depends on the selected display The Settings control panel for the Spectrum display is shown in the following figure Spectrum Frea amp Span BW Traces Scale Prefs E Settings Center 2 44000 GHz Span 40 00 MHz Max Resitrne Span Start 2 42000 GHz Stop 2 46000 GHz Step Size 2 0000 MHz v Auto The control panel for the CCDF display is shown in the following figure CCDF Settings Parameters Traces Measurement Trre Single use Analysis Length C Total Time Span 10 24 MHz Continuous Settings Control Panels ACPR Settings see page 83 Acquire see page 81 Amplitude vs Time Display Settings see page 82 Analysis Settings see page 82 CCDF Display Settings see page 83 Channel Power and ACPR Settings see page 83 Constellation Settings see page 84 EVM vs Time Settings see page 84 SignalVu Vector Signal Analysis Software Printable Online Help Reference Acquire Control Panel Frequency vs Time Settings see page 85 Magnitude Error Settings see page 85 MCPR Settings see page 83 Occupied Bandwidth Settings see page 86 Phase Error vs Time Settings see page 87 Phase vs Time Settings see page
167. og box Show recalled trace J 1 Navigate to the desired file and click Open 2 Check the Show Recalled Trace checkbox 3 Verify that the trace s Show checkbox is selected either on this tab or next to the drop down list located at the top left corner of the graph Gaussian Trace The Gaussian trace is a reference trace that you can compare your trace against Because the Gaussian trace is for reference there are no settings for the trace other than whether or not it is shown Parameters Traces s Traces Tab Amplitude vs Time Display The Traces Tab allows you to set the display characteristics of displayed traces SignalVu Vector Signal Analysis Software Printable Online Help 159 Reference Topics Traces Tab Amplitude vs Time Display a v Show Freeze Save Trace As Show recalled trace Averages x Function Average v 10 C RSA6100A9 20FTes Ar B Setting Description Trace Selects a trace Show Shows hides the selected trace Function Selects the trace processing method Available settings are Normal Average Max Hold and Min Hold Averages Sets the number of traces averaged to generate the displayed trace Freeze Halts updates to the selected trace Save Trace As Saves the selected trace to a file for later recall and analysis Show Recalled trace Displays a saved trace instead of a live trace Trace Processing Traces can be processed to display in different way
168. olbar Settings The Setup settings for Frequency vs Time are shown in the following table Settings tab Description Freq amp Span see page 115 Sets the frequency and span parameters Trace see page 151 Sets the trace display parameters Scale see page 140 Sets the Vertical and Horizontal scale and offset parameters Prefs see page 130 Specifies whether certain display elements are visible Magnitude Error vs Time Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for Magnitude Errors vs Time are shown in the following table SignalVu Vector Signal Analysis Software Printable Online Help 85 Reference Settings tab MCPR Display Settings Description Modulation see page 123 Advanced Params see Sets parameters defining signal modulation characteristics Sets additional parameters defining signal modulation characteristics page 95 Find see page 113 The Find tab is used to set parameters for finding bursts within the data record Analysis Time see page 96 Sets parameters defining analysis time Trace see page 161 Sets traces parameters Scale see page 140 Sets vertical and horizontal scale parameters Prefs see page 130 Sets the whether or not different display elements are shown MCPR Display Settings Menu Bar Setup gt Settings Application Toolbar Set
169. ollowing the rising edge of each pulse SignalVu Vector Signal Analysis Software Printable Online Help 131 Reference Topics Pulse to Pulse Carrier Phase Measurement Pulse to Pulse Carrier Phase Measurement The phase difference between the first pulse and the selected pulse in the analysis window Pulse Width Measurement The time from the rising edge to the falling edge at the 3dB level 50 of the mean power for the pulse on Quadrature Error Measurement The orthogonal error between the I and Q channels The error shows the phase difference between I and Q channels away from the ideal 90 degrees expected from the perfect I Q modulation Constellations with quadrature error will show some leakage of I into Q and vice versa Ranges Tab Spurious Use the Ranges tab to specify the parameters that control the Spurious measurement From the Ranges tab you specify the start and stop frequencies for ranges whether or not a range is enabled the parameters that specify what constitutes a spur measurement filter shape and bandwidth and the detection method used for processing signals Parameters Reference Ranges Lmits Trace Scale Prefs Start Stop m cree Review table A v 1 610000 GHz 1 720000 GHz m Edit 7 Enabled Filter shape Detection Threshold Excursion Save table RBW v Average v 50 00 dBm 5 0 dB le BW 1 000 Mhz v Auto 7 VEW 1 MHz Load table SignalVu Vector Signal Ana
170. omedians ca FR E FREE DH Sabe SPARE RUN a de Rows 41 Pulse Trace Displays iu eee err erede ERE RR Ie tet erdt EEE ate ehe pne 43 Using Markers Define Markers Control Panel ooooococcccccconconnncnnnonnncnnnonnncnn se eme eese eese eese 44 IAE cCNNETET 46 Using Markers in Noise Mode oooooccoccoocccnnnonnncnnnonnncnnnrnnrnn ese eme messe sese 48 Reference Operating Your Instrument Tou ch screen ACOnS mociones 51 Elements of the Display irm aria Des 53 Data File Format ida aee RA T e Deve imd EA ME E ROO RR FOR AS HR TEE EAS 56 Error and Information Messages oococcooccconnonnncnnconnncnn nora me eese eese he esee 59 Menus liner Wisin E A A A A cde ented 66 File Menu File Meal id A O E dabas 67 A DR 67 SV Save A A A A A a A d Ee Od Dena 68 Dd a A A AA 69 Print Pri is 69 Application Presets csi a iio 70 lj AAA AnS 72 View Menu View MEMU LT 73 Full SCH OH areeni ERA 73 Marker Tola oe 73 Status Di iia 74 Run Menu Fun MO isa 75 RUM rt Mr 75 RMS ETE 76 A 76 Replay aiii is 76 Men Bar Run Replay inocente iia E PRA 76 Single Seguen e A A A O 76 Continuous Acquisition Mode isses se ese eme mess sese T Markers Menu Mark ers Ment irs isicac 77 Setup Menu i SignalVu Vector Signal Analysis Software Printable Online Help Table of Contents Setup MENU a dd T EE CUm T lac je MM
171. on Readout Description Opens the Define Markers control panel y Mi Selected marker readout This readout shows which marker is selected The pop up menu allows you to choose the selected marker add markers and turn all markers off Frequency Y 1 4875 GHz Marker position controls For frequency displays this readout shows the marker position in Hertz For time displays this readout shows the marker position in seconds The position of the selected marker can be changed by selecting the numeric readout and using the knob to adjust the value Changes the analyzer s Center Frequency to the frequency of the selected marker Not selectable for time markers Moves the marker to the highest peak on the signal On displays that scale about zero on the vertical axis for example Magnitude Error EVM and Frequency vs Time the highest peak selected by the Peak button is an absolute value therefore negative peaks are included in the search for the highest peak Moves the selected marker to the next peak to the left of the current position Moves the selected marker to the next peak to the right of the current position E ES Moves the selected marker to the next lower peak value The peak value here refers to the numeric value of the peak amplitude Thus when repeatedly moving the marker it can move to the right or left depending on the location of the next lower value Moves the selected marker
172. on taken in swept mode Can t replay Live data needed for swept settings The measurement could not produce results because it was asked to reanalyze Replay the acquisition but it is in Swept acquisition mode Swept mode measurements cannot analyze recalled data CISPR accuracy limited by acq memory Adjust RBW or freq range The CISPR function was applied but the available data did not represent a long enough time to satisfy CISPR requirements Increasing RBW reduces the amount of time needed for analysis Reducing frequency range for example by reducing Span decreases sample rate allowing the available memory to cover a longer time period An acquisition was completed even though a hardware failure was detected This message refers to the acquisition data currently being analyzed but not necessarily to the current status of the instrument If this data is from a saved file the error cannot be cleared Data acquired during RF ADC overrange An acquisition was completed but the signal was outside the range of the analog to digital converter at the time this data was acquired This message refers to the acquisition data currently being analyzed but not necessarily to the current status of the instrument If this data is from a saved file this error cannot be cleared Data acquired during RF digital gain overflow SignalVu Vector Signal Analysis Software Printable Online Help 61 Reference Error and Information Messages 62
173. onstant Phase CW Changing Phase LFM Linear Chirp N A 116 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Frequency Deviation Measurement Frequency Deviation Measurement The Frequency Deviation measurement is the difference between the maximum and minimum measured values of the signal frequency during the Measurement Time Frequency Error Measurement The frequency difference between the measured carrier frequency of the signal and the user selected center frequency of the analyzer Frequency Tab The Frequency tab specifies the center frequency parameters used by all views within the application window Analyss Time Spectrum Time Frequency Unts Frequency 1 50000 GHz Settings tab Description Frequency Specifies the center or measurement frequency Gain Imbalance Measurement The gain difference between the I and Q channels in the signal generation path Constellations with gain imbalance show a pattern with a width that is different from height IQ Origin Offset Measurement The magnitude of the DC offset of the signal measured at the symbol times It indicates the magnitude of the carrier feed through signal SignalVu Vector Signal Analysis Software Printable Online Help 117 Reference Topics IQ Sampling Parameters IQ Sampling Parameters The IQ Sampling Parameters tab enables you to set the controls for real time acquisition Depending on the setting chosen for Adjust two
174. or Signal Analysis Software Printable Online Help Reference Topics RMS Frequency Error Measurement RMS Frequency Error Measurement The RMS Frequency Error measurement is the RMS average of the Freq Error vs Time trace computed over the Measurement Time RMS Phase Error Measurement The RMS Phase Error measurement is the RMS average of the Phase vs Time trace computed over the Measurement Time Scale Tab Amplitude vs Time The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency In effect these controls operate like pan and zoom controls Scale 100 00 dE Scale 11 333 us Offset 0 00 dB Reset Scale Offset 0 000 Setting Description Vertical Controls the vertical position and scale of the trace display Scale Changes the vertical scale Offset Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Sets the period of time shown in the graph Offset Allows you to pan a zoomed trace Autoscale Resets the scale of the horizontal axis to contain the complete trace Reset Scale Resets all settings to their default values SignalVu Vector Signal Analysis Software Prin
175. ows you to specify the Units Seconds or Symbols for the GP Digital Modulation displays Trace see page 151 Allows you to set the trace display characteristics Enables you to set characteristics of the measurement display Prefs see page 130 EVM vs Time Display Settings Menu Bar Setup gt Settings The settings for the EVM vs Time display are shown in the following table 84 SignalVu Vector Signal Analysis Software Printable Online Help Reference Settings tab Frequency vs Time Settings Description Modulation see page 123 Specifies the type of modulation used in the input signal and other parameters that controls the demodulation of the input signal Advanced Params see Specifies Freq Offset Magnitude normalization parameters and enables swapping page 95 and Q Find see page 113 The Find tab is used to set parameters for finding bursts within the data record Analysis Time see page 96 The Analysis Time tab contains parameters that define how the signal is analyzed in the general purpose digital modulation displays Trace see page 161 Specifies the display characteristics of the displayed trace Scale see page 140 Specifies the horizontal and vertical scale settings Prefs see page 130 Specifies whether certain display elements are visible Frequency vs Time Settings Menu Bar Setup gt Settings Application To
176. pan about the point of interest Span Zoom adjusts the span control and can affect the acquisition bandwidth I CF Pan Adjusts the Center Frequency according to horizontal movement a Zoom Adjusts horizontal and vertical scale of the graph The first direction with enough movement becomes the primary scale of adjustment Adjustment in the secondary direction does not occur until a threshold of 30 pixels of movement is crossed Dragging to the left or down zooms out and displays a smaller waveform increases the scale value Dragging to the right or up zooms in and displays a larger waveform decreases the scale value m 3 1 Pan Adjusts horizontal and vertical position of the waveform The first direction with enough movement becomes the primary direction of movement Movement in the secondary direction does not occur until a threshold of 30 pixels of movement is crossed Reset Scale Marker to peak Returns the horizontal and vertical scale and position settings to their default values Moves the selected marker to the highest peak If no marker is turned on this control automatically adds a marker a Next Peak Moves the selected marker to the next peak Choices are Next left Next right Next lower absolute and Next higher absolute Add marker Defines a new marker located at the horizontal center of the graph Delete marker Removes the last added marker All markers off
177. pe Data Displays the sample rate and record length reported by the oscilloscope Run Run mode specifies whether the analyzer will stop acquiring data after 1t completes a measurement sequence Continuous In Continuous mode once the analyzer completes a measurement sequence it begins another m Single In Single mode once the analyzer completes a measurement sequence it stops NOTE A measurement sequence can require more than one acquisition If the analyzer is configured to average 100 traces together the measurement sequence will not be completed until 100 traces have been acquired and averaged Amplitude vs Time Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Amplitude vs Time display are shown in the following table Settings tab Description BW see page 100 Sets the Bandwidth Method used for setting the measurement bandwidth Traces see page 159 Allows you to select the type of trace to display and their functions Scale see page 139 Sets the vertical and horizontal scale parameters Prefs see page 130 Specifies whether certain display elements are visible Analysis Settings 82 Menu Bar Setup gt Analysis Application Toolbar Ana The Analysis control panel provides access to settings that are used by all displays within the application These settings affect only post processing and they do not control hardwa
178. perties tab 3 Click Add This displays a drop down list under MR Marker Reference found inside the Reference box The first marker defined 1s always designated the Marker Reference Subsequently defined markers are designated as Delta Markers you can also select and adjust markers by clicking on an existing marker on a trace 4 From the drop down list select the trace to which you want to assign the marker SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Using Markers Tek RSA61004 Spectrum View Run Markers Setup Tools Window Help E x ans Freq 1 00000 GHz Reflev 0 00 dam aaa rentar Run n SL 7 Tracei v Show Peak Normal Ic eat 2 0 00 dam gt dBfdy 10 00 cB D RBW 300 100 00 dem Autoscale CF 1 00000 GHz 2 Span 40 00 MHz Define Marker Properties Define Peaks Markers Reference Delta Markers Acid Marker Ma Mi mo Ma M4 Attach to Tael Trace1 Delete n selected desplay Readouts Delta v Al OF Markers Define v MR Frequency 999 55 MHz To Center Peak e x Stopped Acq BW 40 00 MHz Aca Length 14 680 us Real Time Free Run Ref int Atten 25 dB Preamp Off 5 Click the close control panel button to remove the Define Markers control panel 6 Click on the marker on the trace to activate that marker 7 Drag the marker in the graph using the touchscreen or
179. plays dialog select RF Measurements in the Folders box 3 In the Available displays box double click the Occupied Bandwidth icon or select the icon and click Add The Occupied Bandwidth icon will appear in the Selected displays box and will no longer appear under Available displays 4 Click OK to display the Occupied Bandwidth oma BW tt x dB BW Elements of the Display V Avg 10 Autoscale Normal A AN 4 24 MHz I ew rae d l l Ox de em lx T 4 56 MHz 26 0 de f sRBw al hee 4 VBW 20 kHz J 100 00 dBm Position 2 13000 GHz Freq Error 5 124 kHz OBW Level left 21 66 dBm OBW Level right 21 75 dBrr OBW Ref Power 2 36 dBm total pi wer x dB BW Ref Power 11 15 Bm pak powjar 0070 001 SignalVu Vector Signal Analysis Software Printable Online Help 35 Taking Measurements Occupied BW amp x dB BW Display Item Display element Description 1 Check mark indicator The check mark indicator denotes the display for which the acquisition hardware is optimized This indictor appears only when the display is the selected display 2 Averaging readout Appears when averaging is enabled Settings gt Parameters tab gt Average results Displays Avg n of m while averaging the results and Avg m once the requested number of results have been averaged 3 Autoscale Adjusts the vertical and horizontal settings so that the entire trace fits i
180. plementary information about the remote commands for the Signal Vu software The Programmer Manual is provided as a printable PDF file For detailed descriptions of the remote commands see the R 461004A Series Real Time Spectrum Analyzers Programmer Manual 071 1913 XX and the DPO7000 DPO70000 and DSA70000 Series Digital Oscilloscopes Programmer Manual 077 0010 XX m SignalVu Printable Help Document PDF 077 0225 XX A PDF file version of the online help that can easily be printed The SignalVu documentation PDFs are located on the Optional Applications Software for Windows Based Oscilloscopes DVD The most recent versions of the product documentation in PDF format can be downloaded from www tektronix com manuals You can find the manuals by searching on the product name 4 SignalVu Vector Signal Analysis Software Printable Online Help Comnecting Signals Connecting Signals and Selecting the Analysis Channel Connecting Signals and Selecting the Analysis Channel SignalVu analyzes signals acquired by the oscilloscope For information on the oscilloscope input signal capabilities and how to trigger on a signal see the oscilloscope online help Note that SignalVu does not control triggering on the oscilloscope you will need to use the oscilloscope triggering functions to achieve a stable triggered signal on the oscilloscope The SignalVu software analyzes one channel at a time so you need to specify which oscilloscope input channel
181. quisition Data Save acquisition data records in a file format that can be used by other programs Acquisition data can be saved in either comma separated variable format or MATLAB format Data File Formats see page 56 Options for Saving Pictures of the Display Description Saves exported screen captures in Portable Network Graphics format Saves exported screen captures in Joint Photographic Experts Group JPEG format Option Setting Image PNG Format JPG BMP Saves exported screen captures in Windows bitmap format Menu Bar File gt Print Print displays the Windows Print dialog box for printing a screen capture of the display To save ink when printing use the Colors tab to set the color scheme See Options Settings see page 78 Preview Menu Bar File gt Print Preview Print Preview shows how a print out will appear when it is printed SignalVu Vector Signal Analysis Software Printable Online Help 69 Reference Application Presets Application Presets 70 Menu Bar File gt Application Presets SignalVu includes a set of configuration files that are tailored to specific applications These configuration files referred to as Application Presets open selected displays and load settings that are optimized to address specific application requirements You can add to the default application presets by creating your own application presets See Creating Application Presets see page 72 You acc
182. r example you could display Trace 1 with Function set to Normal Trace 2 with Function set to Max Hold and Trace 3 with Function set to Min Hold The Math trace is the result of subtracting one trace from another The Spectrogram trace is displayed only if the Spectrogram display is shown The Spectrogram trace shows the trace selected in the Spectrogram as a spectrum trace Trace Processing Traces can be processed to display in different ways The Function setting controls trace processing Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value B Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting specifies how many traces averaged SignalVu Vector Signal Analysis Software Printable Online Help 163 Reference Topics Traces Tab Spectrum Display m Max Hold Displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Min Hold Displays the minimum value in the trace record for each display point Each new trace displa
183. re settings SignalVu Vector Signal Analysis Software Printable Online Help Reference CCDF Display Settings Analysis Analss Time Spectrum Time Frequency Units Analysis Offset 0 000 s V Auto Time Zero Reference Acqustion Stat Analysis Length 7 425 us V Auto Actual 7 425 us Setting Description Analysis Time see page 96 Specifies the length of time to use in measurements Spectrum Time see page 150 Specifies whether the Spectrum Analysis display uses the same Analysis Time parameters as all the other displays or if it uses a different Offset and Length Frequency see page 117 Specifies the measurement frequency center frequency Units see page 165 Specifies the global Power units for all displays CCDF Display Settings Menu Bar Setup gt Settings The settings for the CCDF Display are shown in the following table Settings tab Description Parameters see page 126 Specifies the time to be measured Traces see page 158 Select the trace to be measured and select reference trace for display Channel Power and ACPR Settings Menu Bar Setup gt Settings The settings for the Channel Power and ACPR display are shown in the following table AAA Chan Power amp Freq amp RSW Measurement Params Channels Scale Prefs ACPR Settings gaps Center Freq 1 44940 GHz 30 kM Auto Step 1 000000 MHz v Auto Restore Manual L Defauts SignalV
184. recalled waveform or acquisition records Stopped If Stopped is displayed Signal acquisition has been halted This can occur because the Run button has been pressed or because a trigger event has occurred signal acquisition has occurred and Run mode was set to Single Showing or Hiding the Status Bar B Select View gt Status to toggle the display of the Status bar Run Menu The Run menu provides access to commands that control the signal acquisition Command Description Run see page 75 If acquisition mode is Stopped selecting Run begins a new measurement acquisition cycle If acquisition mode is Run pressing Run halts the current measurement acquisition cycle after it completes Resume Restarts data acquisition but does not reset accumulated results such as Average or MaxHold This allows you to stop acquisitions temporarily then continue If the accumulation is already complete for example 10 acquisitions or 10 averages have already been completed each subsequent Resume command will cause one more acquisition to be taken and its results added to the accumulation Resume is not available if instrument settings have been changed Abort see page 76 Immediately halts the current measurement acquisition cycle Replay see page 76 Reruns measurements using the current acquisition data or a saved file Use this to compute new results for old data after you change settings If you are working
185. rements specified in the P CISPR 16 1 1 document for EMI measurements Blackman Harris 4B Good side lobe level Uniform None Best frequency resolution poor side lobe level and amplitude accuracy FlatTop Best amplitude accuracy best representation of brief events captured near the beginning or end of the time domain data frame poor frequency resolution Hanning Good frequency resolution high side lobe roll off rate SignalVu Vector Signal Analysis Software Printable Online Help 99 Reference Topics BW Tab Amplitude vs Time Display VBW The VBW setting enables disables the Video Bandwidth filter VBW is used in traditional swept analyzers to reduce the effect of noise on the displayed signal The VBW algorithm in the analyzer emulates the VBW filters of traditional swept analyzers The maximum VBW value is the current RBW setting The minimum VBW value is 1 10 000 of the RBW setting VBW is disabled when the Filter shape is set to CISPR NOTE If you are following a procedure that says to set VBW to three times the RBW value or greater it means that the test should be conducted with no VBW effects In the SignalVu software this condition is met by disabling the VBW function BW Tab Amplitude vs Time Display The BW Bandwidth tab allows you to specify the Bandwidth Method used for setting measurement bandwidth This determines what Acq BW the measurement will request p BW Traces Scale Prefs Bandwidth Metho
186. rm file In the Acquire control panel compare the Samples s readout on the IQ Sampling Parameters tab to the Sample Rate readout on the Scope Data tab If the sample rate for the oscilloscope data is more than twice the value of the IQ sample rate it means that the recalled waveform data was decimated for a previous analysis that didn t need the full bandwidth of the oscilloscope waveform Recall the oscilloscope waveform file again to force the software to perform a new conversion based on your new measurement settings Each time you change measurement settings in a way that increases the required acquisition bandwidth you will need to recall the oscilloscope waveform file m The current Frequency setting is different than that of the data record causing the measurement bandwidth to fall at least partly outside the bandwidth of the data If you are using a recalled oscilloscope waveform file try recalling it again with the new Frequency setting This will force a new conversion from oscilloscope samples to IQ samples Analysis failure description of error The instrument is unable to complete a measurement due to difficulty in characterizing the signal For example due to either the signal or settings the instrument may not be able to recognize a pulse so it can compute the pulse measurements m Try changing settings to improve analysis For example when Pulse Trace is displayed try changing the settings on the Settings gt Params
187. ront panel knob or your keyboard to set the value Click Close to save your changes NOTE Frequency Offset is the difference between the center frequency of the selected channel and the Measurement Frequency All channels Main or Adjacent are specified by their offset from the Measurement Frequency 12 After you have configured the Main and Adjacent channels click the close button B in the Settings panel or the Settings button to remove the settings panel 13 Click the Run button Run to take the measurements Viewing results MCPR measurement results are displayed both in the main display and in a table below the spectrum display Individual Main channel power measurements appear in the Main display under the channel identifier Individual adjacent channel power ratios also appear in the main display under the adjacent channel identifier SignalVu Vector Signal Analysis Software Printable Online Help 33 Taking Measurements Occupied BW amp x dB BW Display Tek RSA61004A MCPR Fle View Run Markers Setup Tools Window Help O Xx Displays Freq 1 00000 GHz Reflev 0 00 dBm Replay J Run 4 Normal gea 2 10 00 dem dB dv 10 00 dB 110 00 dem Autoscale 2 Offset 1 00000 GHz Scale 39 81 MHz Reference dh Offset Lower Upper Power Al 125MH 6067dB 59 15cB B 64 dBm A2 17 5 MH 60 07 dB 58 8 cB Stopped Acq BW 40 00 MHz Acg Length 169 240 us Real Tme Free R
188. rror message information about the error is logged to the Windows Event Viewer To display the Windows Event Viewer 1 Select Start gt Control Panels 110 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Displaying the Windows Event Viewer 2 Select Administrative Tools If your instrument displays control panels in Category View select Performance and Maintenance and then select Administrative Tools 3 Double click Event Viewer 4 From the Event Viewer window select Application this displays a list of all errors that have been reported to the operating system from applications B Event Viewer Fie Action View Heb e 08 082 Event Viewer Local Application 2 615 event s y Appicaton T 113 Security 15 System Qe Error 14 Internet Explorer Error D informaton Quo Error Error Error A Information Warming Warning A Informaton Dirformaton Error Error Error A Information 2006 31 2006 1 2006 1 2006 1 2006 1 2006 1 2006 1 2006 31 2006 1 2006 31 2006 131 2006 1 2006 7 31 2006 7 31 2006 7 31 2006 7 31 2006 6 40 08 PM 6 40 07 PM 6 35 51 PM 00 50 PM 00 35 PM 00 08 PM 00 01 PM 2 48 00 PM 1 16 59 PM 11 30 59 10 44 12 TARSA TekRSA TekRSA Msurstaler TekRSA TekRSA TERSA Useren SmsClent Alert Manager Alert Manager Ev SmsClent SmsClent Userenvy Usereny Useren McLogEvent Errors reporte
189. s The Function setting controls trace processing Normal Each new trace is displayed and then replaced by the next trace Each data point contains a single vertical value Average Multiple traces are averaged together to generate the displayed trace There is one vertical value for each underlying frequency data point Once the specified number of traces have been acquired and averaged to generate the displayed trace each new trace takes the place of the oldest trace in the calculation The Number of Traces setting specifies how many traces averaged Max Hold Displays the maximum value in the trace record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Min Hold Displays the minimum value in the trace record for each display point Each new trace display point is compared to the previous minimum value and the lesser value is retained for display and subsequent comparisons Saving Traces To save a trace for later analysis 1 160 Select the Save Trace As button This displays the Save As dialog box SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Traces Tab Error vs Time Display Saven gt Screen Captures Bom Name Spe Type TiMuspes 1 48240Ger 1 dox 397KB DPX Fie My Neto Save as type 2 Navigate to the folder where you want to save the trace or use the d
190. s shared with the Statistics and Table views 4 Statistics summary Display of measurement statistics for the selected Result 9 Vertical range Located at the top of the left graph edge and at the bottom of the left graph edge use these controls to adjust the values at the top of the graph and the bottom of the graph 6 Plot Selects between Trend and FFT for the trace 7 Autoscale Set the axes to values that show all trace points 8 Horizontal offset Adjusting this value moves the graph right or left 9 Trigger indicator Indicates the trigger point on the pulse train if the trigger occurred during the time frame of the pulse measurements 10 Pulse indicator Indicates the pulse selected by the Pulse setting 11 Pulses Adjusts the horizontal scale Changing the Pulse Statistics Display Settings see page 88 Pulse Table Display Pulse measurements can be displayed in a table or individually The Pulse Table lists the selected measurements in a spreadsheet format showing the pulse number on which the measurement was SignalVu Vector Signal Analysis Software Printable Online Help 41 Taking Measurements Pulse Table Display taken and the value of the measurement for the pulse number Pulses are numbered according to their relationship to a time reference either the Acquisition Start point or the Trigger point Those before the reference point have negative numbers and those after it are positive The analyzer takes the following
191. s specified on the Limits tab RF amp IF Optimization This parameter is not used by the SignalVu application Params Tab Pulsed RF 128 The Params tab enables you to adjust several measurement parameters for Pulsed RF displays Params Define Levels Freq Estimatio Measurement Filter Gaussan Bandwidth 10 MHz Setting Scale Prefs v Power threshold to detect pulses 12 dBc Minimum OFF time between pulses 0 000 s C Max number of pubes 101 Description Measurement Filter Specify whether a filter is used to limit the bandwidth of the input signal Bandwidth Sets the bandwidth of the measurement filter Power threshold to detect pulses Specifies the level used for locating pulses in the data Minimum OFF time between pulses Specifies the time the signal must fall below the power threshold for two pulses to be considered separate pulses Max number of pulses Specifies the number of pulses to measure within the analysis time SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Peak Markers Menu Measurement Filter Three choices are available for the measurement filter No Filter Max BW The widest acquisition bandwidth available is used The Bandwidth setting is disabled but shows the value in use No Filter This is the default The Bandwidth control is enabled for you to specify an acquisition bandwidth B Ga
192. scription Scale see page 148 Adjusts the vertical and horizontal scale and offset of the display Prefs see page 130 Specifies whether or not certain display elements are shown 92 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics About the Vector Signal Analysis Software About the Vector Signal Analysis Software This window displays information about the SignalVu software and oscilloscope hardware it is running on About Tektronix Vector Signal Analysis Software Tek 4 Tektronix Vector Signal Analysis Software V1 3 543 ektronix Copyright 2006 2008 Tektronix Inc All rights reserved Enabling Innovation MATLAB 1984 2006 The MathWorks Inc Installed Options D General Purpose Modulation Analysis Opt SYM Hardware Information Serial Number PQ204 Warning This computer program is protected by copyright law and international treaties Unauthorized reproduction or Copy Info distribution of this program or any portion of it may result in severe civil and criminal penalties and will be prosecuted to the maximum extent possible under law Version At the top of the window is a line that displays the version of the vector signal analysis application software Installed Options This text box lists the software options installed This window does not list the options installed on the oscilloscope just those that are installed with the vector signal analysis
193. sis Software Printable Online Help 65 Reference Menu Overview The Measurement time for Freq amp Phase results see page 110 specifies how far across the pulse top the instrument should wait before measuring the Phase Difference and Frequency Difference for each pulse If this value is set too large for any of the pulses in the signal the measurement point ends up on the falling edge or during the pulse off time E Decrease the Measurement time for Freq amp Phase results setting Settings gt Define tab Unexpected software error Please cycle power and try again If the problem persists contact your Tektronix Service Center An unrecoverable error has occurred and the instrument application software will shut down Switch the instrument off and restart it or relaunch the TekScope and SignalVu applications Unable to lock to External Frequency Reference VBW not applied Acq BW too small Increase VBW or measurement bandwidth Make sure Sampling Parameters are set to Auto VBW not applied Spectrum Length too short This message occurs when the requested VBW can t be produced because the Spectrum Length is too short To clear this problem set the Spectrum Length to Auto or manually increase the Spectrum Length see Setup gt Analysis gt Spectrum Time tab If Spectrum Length is coupled to Analysis Length set Analysis Length to Auto or manually increase it see Setup gt Analysis gt Analysis Time tab Menu Overview
194. sociated trace Show graticule Select to display or hide the graticule Show Marker readout in graph selected marker Shows or hides the readout for the selected marker in the graph area Marker Noise mode Select to enable or disable the Marker Noise mode Use this mode to measure noise on the trace See Using Markers in Noise Mode see page 48 Prefs Tab Spurious The Prefs tab enables you to change appearance characteristics of the Spurious display Parameters Reference Ranges Limits Trace Scale Prefs Trace points 801 v per Range 2 On Show limits Shadec v Off a Y Show Marker readout in graph selected marker Setting Description Graticule Select On or Off to display or hide the graticule Trace Points Select the desired number of points per range Show limits Specifies how limits are shown in the graph Shaded The region above the Limit see page 119 is indicated by a shaded area Line Only The limit values are indicated by a green line Off The limit values are not indicated in the graph Show Marker readout in graph selected marker Shows or hides the readout for the selected marker in the graph area Pulse to Pulse Frequency Difference The Pulse to Pulse Frequency Difference measurement is the difference between the frequency of this pulse and frequency of the first pulse The instantaneous frequency is measured at a user adjustable time f
195. stment Adjusts the vertical scale Use the knob to adjust the value of the top of the graph 2 Vertical offset adjustment Adjusts the phase error shown at the vertical center of the display 3 Autoscale button Adjusts the vertical and horizontal settings so that the entire trace fits in the view 4 Horizontal Offset Adjusts the horizontal position of the trace 5 Max and Min readouts Displays the maximum and minimum value of the phase error within the analysis times and the times at which they occurred 6 Horizontal Scale Sets the time spanned by the graph 7 Clear button Restarts multi trace functions Avg Hold 8 Trace function Shows the trace function as set on the Settings gt Trace tab Changing the Phase vs Time Display Settings see page 87 14 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements RF I amp Q vs Time Display RF amp Q vs Time Display This is a plot of the baseband In Phase I and Quadrature Q components of a modulated carrier The plot is in the time domain with I and or Q values the Y axis Note that the trace s in the RF I amp Q vs Time display can be set to a maximum of 100 000 points however the actual number of trace points can extend up to 1 000 000 points if Max trace points is set to Never Decimate If the Analysis Length includes more than the selected Max trace points value the trace is decimated using the method specified with the Detection contro
196. surement time The defined channel width for the Power Measurement defines the bandwidth and shape of the filter used to remove any RF power on frequencies outside of the channel bandwidth SignalVu Vector Signal Analysis Software Printable Online Help 137 Reference Topics Rho Measurement Rho Measurement The normalized correlated power of the measured signal and the ideal reference signal Like EVM Rho is a measure of modulation quality The value of Rho is less than 1 in all practical cases and is equal to 1 for a perfect signal measured in a perfect receiver Ripple The Ripple measurement is calculated as follows Ripple Positive Maximum Difference Negative Maximum Difference where the maximum differences are calculated as shown in the following illustration Positive Maximum Difference Negative Maximum Difference Ripple Measurement Pulsed RF Displays Ripple is the peak to peak ripple on the pulse top It does not include any preshoot overshoot or undershoot By default the first 25 and the last 25 of the pulse top is excluded from this measurement to eliminate distortions caused by these portions of the pulse The units for this measurement can be set to either Watts default or Volts Rise Time Measurement Pulsed RF Displays This measurement determines the time required for a signal to rise from 10 to 90 or 20 to 80 of its maximum steady state voltage amplitude 138 SignalVu Vect
197. t Power Main Al SMH 10 66 dBm A2 10MHz A3 15 MHz Stopped Acq BW 40 00 MHz Aca Length 169 240 us Rea Time Free Run Ref Int Atten 15 dB Preamp Of Measuring Adjacent Channel Power Ratio 1 Select the Displays button 2 Select RF Measurements from the Folders box 3 Double click Chan Power and ACPR in the Available displays box Click OK to complete your selection 4 Press the front panel Freq button and use the front panel keypad or knob to adjust the frequency to that of your main channel 5 Press the Settings button This displays the control panel for Chan Power and ACPR the tab displayed will be the tab displayed the last time the Settings panel was opened Chan Power amp Freq amp RBW Measurement Params Channels Scale Prefs ACPR Settings Number of adjacent pars 3 Channel Bandwidth 3 94 MHz Channel Spacing S MHz 6 To set the number of adjacent channels select the Channels tab Enter the number of channels in the Number of adjacent pairs value box If zero is entered for the number of adjacent pairs the resultant measurement will be channel power only 30 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Channel Power and ACPR Adjacent Channel Power Ratio Display NOTE As you add adjacent channels the span of the display is adjusted so that all the channels can be seen Use the horizontal scale and offset to zoom the display in on any portion of the trace
198. t locations based on signal frequency b Select Relative to specify mask point locations as offsets from the center frequency To edit values in the table a To edit an existing value double click on the cell you want to edit b To add a new point to the table click on Add Point Edit the values as required and click Apply when you are finished with your changes To specify a frequency multiplier you can type K M or G For the power level you only need to specify a numeric value The unit is set to the current Units setting Setup gt Analysis gt Units 1 2 To delete a point from the table select the point to be removed and click Delete To close the Mask Editor without saving your changes click Cancel if you have already clicked Apply this only cancels changes since the last time Apply was clicked If Search mode is already enabled and the instrument is in Run mode you can run a Search using your changed points without closing the Mask Editor by clicking Apply To save changes and close the Mask Editor click OK To save the mask to a file for later recall click Save As From the Save As dialog name the file and save it in the desired location SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Define Tab Search Masks are saved only in CSV Comma Separated Value format Performing a Mask based Search To perform a Search using a mask Select Tools gt Search Click
199. t to CISPR Review table Click to display the Ranges table The Ranges Table shows the enabled ranges and all the settings specified on the Ranges and Limits tabs associated with the enabled ranges Save table Click to save the current Range table to a file Load table Click to load a saved Range table from a file Changing the Range Start and Stop Frequencies 2 Edit Range and Carrier frequencies B C D E F G H Start Freq 1 610000 GHz 1 720000 GHz 1 830000 GHz 0 GHz 2 050000 GHz 2 160000 GHz 2 270000 GHz 2 380000 GHz Stop Freq 1 720000 GHz 1 830000 GHz 1 940000 GHz 2 160000 GHz 2 270000 GHz 2 380000 GHz 2 490000 GHz Enabled 000080850 Carrier Frequency 1 500000 GHz Channel width 40 000 MHz Frequency bands of carrier and ranges cannot overlap To change the range start and stop frequencies edit the Spurious Frequency Plan 1 Click the Edit button on the Settings gt Range tab 2 Click the Enabled box for a range to take measurements in the range SignalVu Vector Signal Analysis Software Printable Online Help 133 Reference Topics Reference Tab Spurious 3 Click on the frequency setting to change it Type in a number for the frequency and a letter as a multiplier then press Enter on the front panel You can use k m or g to set the frequency multiplier 4 Click OK to save your changes You can enable a range on the Ranges control panel tab by selecting the range from
200. t to Time Domain this value is the number of successive capture records that are averaged Correct for Noise Floor Enables disables the Noise Floor Correction function Optimization This parameter is not used by the SignalVu application Power Reference Specifies power against which the results are compared Choices available are each of the existing main channels and Total power in main channels Only present when MCPR is the selected display Channel Filter Specify the channel filter used Select between None default and Root raised Cosine Filter Parameter Value entry box for the Root raised Cosine filter Adjacent Channel Filter Present only when the Channel Filter is set to RRC Chip Rate Value entry box for the RRC chip rate Present only when the Channel Filter is set to RRC Correct for Noise Floor When this setting is enabled the instrument applies a correction to the ACPR or MCPR measurement to reduce the effect of instrument noise on the results It generates this correction by taking a preliminary acquisition to measure the instrument noise floor Once this is done the measurement proceeds applying the correction to each result When any relevant settings reference level attenuator frequency or span are changed the instrument performs a new noise measurement and correction Modulation Tab Menu bar Setup gt Settings gt Modulation The Modulation tab specifies the type of modulation used in
201. table Online Help 139 Reference Topics Scale Tab EVM Magnitude Error vs Time Scale Tab EVM Magnitude Error vs Time The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Measurement Frequency Modulation Advanced Params Find Analysis Time Trace Scale prefs Vertica Horizonta Scale 1 00 Scale 9 00 Sym Offset 0 000 Offset 0 00 Sym Setting Description Vertical Controls the vertical position and scale of the trace display Scale Changes the vertical scale units Offset Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Allows you to in effect change the span Offset Allows you to pan a zoomed trace without changing the Measurement Frequency Offset is only enabled when the span as specified by Freq div is less than the acquisition bandwidth Autoscale Resets the scale of the horizontal axis to contain the complete trace A Note About Units The Units used for the horizontal scale can be either Seconds or Symbols To set the units for the horizontal scale display the Analysis Time tab On the tab select the appropriate units from the Units drop down list Scale T
202. te the frequencies at which the level is x dB down from the peak level calculated over the measurement bandwidth The frequency difference between the upper and lower crossing thresholds is the x dB BW Range 80 0 to 1 0 dB Resolution 0 1 Inc dec small 0 1 large 1 Default 26 dB Max Hold Spectral Data Max Hold displays the maximum value in the acquisition record for each display point Each new trace display point is compared to the previous maximum value and the greater value is retained for display and subsequent comparisons Parameters Tab Spurious The Parameters tab enables you to specify settings that control the Spurious measurement SignalVu Vector Signal Analysis Software Printable Online Help 127 Reference Topics Params Tab Pulsed RF Parameters Reference Ranges Limts Trace Scale Prefs Multi List Spurs All spurs Setting Single RF amp IF Optimization Auto hd O Over Limit Description Frequency Ranges Multi Enables the instrument to display all enabled ranges in the graph Single Limits the graph to the display of only one range The displayed range is set to the range that contains the selected spur List Spurs All spurs Displays any spur that exceeds the Threshold and Excursion values set on the Ranges tab Over Limit Displays only spurs that exceed both the Threshold and Excursion values set on the Ranges tab and the limit
203. tection Threshold Sets the level required for the signal to qualify as a burst Enter a value in dBc down from top of the signal Use Synch Word When enabled specifies the string of symbols to look for Enter the search string with external keyboard or the on screen keyboard Clear Blanks the search string field SignalVu Vector Signal Analysis Software Printable Online Help 113 Reference Topics Freq amp RBW Tab RF Measurements Freq amp RBW Tab RF Measurements The Freq amp RBW tab specifies frequency parameters for the Channel Power amp ACPR MCPR and Occupied Bandwidth measurements Freq amp REW Measurement Params Channels Scale Prefs Center Freq 1 95000 GHz RBW 30 000 itiz v Auto Step 2 0000 MHz v Auto v VBW 30 kHz Setting Description Center Freq Specifies the center measurement frequency Step The Step control sets the increment decrement size for the adjustment of the center frequency If Auto is enabled the analyzer will adjust the Step size as required RBW Select Auto or Manual Adjusts the RBW for the entire measurement This setting is Independent of the Spectrum view s RBW setting VBW Adjusts the VBW Video Bandwidth value VBW Maximum current RBW value VBW Minimum 1 10 000 RBW setting NOTE While the center frequency and step settings on this control tab are shared between ACPR MCPR and Occupied Bandwidth the RBW setting is not shared The RBW setting is
204. the Enable Search checkbox Select the trace that you wish to search from the Search in drop down list Verify that the trace you selected to search is the selected trace in the display 1 2 3 4 5 Select either is outside mask or is inside mask from the Search for drop down list 6 Click the Edit limits button 7 Edit the table as necessary or click Load to use a previously saved mask 8 If you load a saved a mask use the Open dialog to locate and open the mask file 9 Click OK The following figure shows the results of an is outside mask Search The vertical red bar highlights results that match the Search definition This readout identifies the selected trace Tek RSA61004 fipectrum v Run Makers Setup Tools Window Help F iettings Trg Aca Jana Freq 1 50200 GHz RefLev 0 00 dam Repay Run 7 Tracel v Show Peak Normal Clear 0 00 Bm Y dB div 10 0 c8 Y RBW 200 kHz 100 00 dam gt CF 1 50200 GHz gt Span 20 00 MHz SignalVu Vector Signal Analysis Software Printable Online Help 109 Reference Topics Define Tab Pulsed RF Define Tab Pulsed RF The Define tab enables you to specify parameters that control where measurements are made on a pulse Params Define Levels Freq Estimation Scale Prefs y Measurement pointfor 1 000 us Measurement time for v Auto 4l Pulse pulse results Freq amp Phase results ffr Start 50 rise Portion of pulse top
205. the Range drop down list and clicking the Enabled check box If you need to change the frequency of a range you must edit the spurious frequency plan using the Edit button Specifying Spur Requirements A spur is a signal peak that exceeds both the Threshold and Excursion settings on the Ranges tab The Threshold and Excursion settings are absolute values they are not calculated relative to a reference The Threshold and Excursion settings are specific to the selected range If you want to use different settings for spurs in different ranges you have to set the values separately for each range The Excursion control is used to avoid interpreting a single spur as multiple narrower spurs by requiring the amplitude to drop by the Excursion amount between spurs Raising the Threshold value means that fewer larger signals will be identified as spurs To specify the spur requirements for a range 1 Select the Range for which you want to specify the spur requirements 2 Setthe Threshold value 3 Setthe Excursion value Reference Tab Spurious 134 The Reference tab enables you to specify the Power Reference parameter The Power reference parameter is used to calculate relative values in the Spur table and to calculate relative amplitude limits LL Parameters Reference Ranges Limits Trace Scale Prefs Power reference No reference v Manual leve U ve No reference SignalVu Vector Signal Analysis Software Printable
206. the analysis length Displays RMS and Peak values with location of Peak value Phase Error The RMS phase difference between the measured signal and the ideal reference signal Displays RMS and Peak values with location of Peak value Mag Error The RMS magnitude difference between the measured signal and the reference signal magnitude Displays RMS and Peak values with location of Peak value MER RMS The MER is defined as the ratio of I Q signal power to I Q noise power the result is indicated in dB IQ Origin Offset The magnitude of the DC offset of the signal measured at the symbol times It indicates Frequency Error the magnitude of the carrier feed through signal The frequency difference between the measured carrier frequency of the signal and the user selected center frequency of the instrument Gain Imbalance The gain difference between the and Q channels in the signal generation path Constellations with gain imbalance show a pattern with a width that is different form height Quadrature Error The orthogonal error between the and Q channels The error shows the phase difference between and Q channels away from the ideal 90 degrees expected from the perfect I Q modulation Not valid for BPSK modulation type Rho The normalized correlated power of the measured signal and the ideal reference signal Like EVM Rho is a measure of modulation quality The value of Rho is less than 1 in all pract
207. the graph SignalVu Vector Signal Analysis Software Printable Online Help 157 Reference Topics Traces Tab CCDF Traces Tab CCDF The Traces tab enables you to select traces for display You can choose to display a live trace a saved trace and a reference trace n Parameters Traces Trace v O show O Freeze Save Trace As Setting Description Trace Selects a trace for display Choices are Trace 1 2 and Gaussian Trace 1 and 2 can be saved traces Show Shows hides the selected trace Freeze Halts updates to the selected trace Save Trace As Saves the selected trace to a file for later recall and analysis Show recalled trace Used to select a saved trace for display Saving Traces To save a trace for later analysis 1 Select the Save Trace As button This displays the Save As dialog box Saven gt Screen Captures Name fjMuspesx 1 48240GHg 1 dox 158 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Traces Tab Amplitude vs Time Display 2 Navigate to the desired folder or use the default 3 Type a name for the saved trace and click Save Recalling Traces You can recall a previously saved trace for analysis or comparison to a live trace To select a trace for recall 1 Select the trace into which the recalled trace will be loaded from the Trace drop down list 2 Check the Show checkbox 3 Click the button to display the Open dial
208. the phase difference between and Q channels away from the ideal 90 degrees expected from the perfect I Q modulation Constellations with quadrature error will show some leakage of into Q and vice versa SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Pulse measurements Measurement Measurements Description Average ON Power The average power transmitted during pulse on Peak Power Maximum power during pulse on Average Transmitted Power The average power transmitted including both the time the pulse is on and the time it is off and all transition times Pulse Width The time from rising edge to falling edge at the 50 level Level is user selectable for Volts or Watts Rise Time The time required for a signal to rise from 10 to 90 or 20 to 80 of its ON voltage amplitude Fall Time The time required for a signal to fall from 90 to 10 or 80 to 20 of its ON amplitude Repetition Interval The time from a pulse rising edge to the next pulse rising edge Repetition Rate The inverse of repetition interval Duty Factor 96 The ratio of the width to the pulse period expressed as a percentage Duty Factor Ratio The ratio of the pulse width to the pulse period Ripple The sum of the absolute positive maximum difference and the absolute negative difference See also Ripple see page 138 Droop The slope of the straight
209. tical Controls the vertical position and scale of the trace display Scale Sets the scale of the vertical axis Offset Vertical Offset adjusts the reference level away from top of the graph Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Allows you to change the time displayed in the graph in effect zooming in on the trace Offset Allows you to pan a zoomed trace Autoscale Resets the scale of the horizontal axis to contain the complete trace Scale Tab RF Measurements The Scale tab allows you to change the vertical and horizontal scale settings Changing the scale settings changes how the trace appears on the display but does not change control settings such as Center Frequency Freq amp RBW Measurement Params Channels Scale Scale Scale 39 81 MHz Offset Reset Scale Offset 1 44940 GHz Autoscale Setting Description Vertical Controls the vertical position and scale of the trace display Scale Changes the vertical scale units This is only accessible when the vertical units are set to dBm Offset Adjusts the Reference Level away from the top of the trace display Autoscale Resets the scale of the vertical axis to contain the complete trace Horizontal Controls the span of the trace display and position of the trace Scale Allows you to in effect change the span Offset Allows
210. time and ensures consistent measurements Picture png jpg bmp Screen capture of SignalVu application window They are useful for documenting results in test reports Results Export CSV Results files contain the trace points and numeric values that were produced by the selected measurement The header of a Results file includes key acquisition and analysis settings to aid in the interpretation of the data The file is saved as a plain text file but the contents are formatted as CSV comma separated values Results files can be opened from applications such as Microsoft Excel and MATLAB Measurement Settings txt Measurement settings files contain a list of settings that describe how the instrument is set up for the selected measurement The list contains measurement settings for example Span trace settings for example whether or not a trace is selected and global settings for example Frequency and Reference Level The list of settings contained in the file varies depending on which display is selected Selected Trace varies with display Trace files contain the trace results data in binary format These files are only readable by the SignalVu application Several of the instrument s measurements allow you to recall a Trace file for visually comparing a saved trace to a live trace Acquisition Data with Setup tiq These files contain the acquisition data record and complete instrument setup in
211. tings The Setup settings for MCPR Multiple Carrier Power Ratio are MCPR Settings Freq amp RBW Measurement Params Channel o Prefs s Inactive aa Ch c Offset Number 4 MI Add M 3 84 MHz 7 5 MHz M M2 3 84 MHz 2 5 MHz M2 M3 3 94 MHz 2 5 MHz BW 3 94 MHz M3 M4 3 84 MHz 7 5 MHz M4 Al 3 84 MHz 12 5 MHz Spacing 5 MH 2 3 84 MHz 17 5 MHz Settings tab Description Freq amp RBW see page 114 Specify the frequency and resolution bandwidth used for the MCPR measurements Measurement Params see Specifies parameters controlling how the MCPR measurement is made page 122 Channels see page 102 Specifies the parameters of the channels to be measured Scale see page 145 Specifies the vertical and horizontal scale and offset values Prefs see page 130 Specifies whether or not certain display elements are shown Restore Defaults button Sets parameters for a 4 carrier WCDMA measurement Occupied Bandwidth Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Occupied Bandwidth display are shown in the following table 86 SignalVu Vector Signal Analysis Software Printable Online Help Reference Phase Error vs Time Settings Settings tab Description Freq 4 RBW see page 114 Allows you to specify the Center Frequency Step size and RBW Params see page 127 Allows you to specify the Occupied BW Power x dB
212. tment Adjusts the vertical scaling 3 Span Adjust the bandwidth of the data to be analyzed Not the period of time shown in the display 4 Autoscale Adjusts the vertical and horizontal settings to provide the best display 5 Offset Adjust the horizontal offset 6 Max and Min readouts Displays the maximum and minimum amplitudes as well as when those values occur 7 Scale Sets the time spanned by the graph 8 Clear button Restarts multi trace functions Avg Hold 9 Trace function Displays the current trace function setting Settings gt Trace tab gt Function Reference Changing Amplitude vs Time Display Settings see page 82 Frequency vs Time Display The Frequency vs Time Display shows how the signal frequency varies with time Note that the trace s in the Frequency vs Time display can be set to a maximum of 100 000 points however the actual number of trace points can extend up to 1 000 000 points 1f Max trace points is set to Never Decimate If the Analysis Length includes more than the selected Max trace points value the trace is decimated using the method specified with the Detection control to be equal to or less than the Max trace points setting except when Max trace points is set to Never Decimate This decimated or undecimated trace is what is used for marker measurements and for results export You can set the Max trace points on the Settings gt Prefs tab To display the Frequency vs Time Display
213. to a file when the search condition is met AutoSave trace Saves Trace data to a file when the search condition is met AutoSave picture Saves a screen capture to a file when the search condition is met AutoSave File Naming When one of the AutoSave actions is enabled the name of the saved file is automatically incremented even if the Automatically generate filenames option Tools gt Options gt Save and Export is not enabled When the file is saved it will be saved to the last location a file was saved You can check this location by selecting File gt Save As The Save dialog will show you the current save location If you want to save the file in a different location save a file any type in the desired location This resets the save destination to the new location 94 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Adjacent Channel Leakage Power Ratio Adjacent Channel Leakage Power Ratio Adjacent Channel Leakage power Ratio ACLR is the ratio of the mean power centered on the assigned channel frequency to the mean power centered on an adjacent channel frequency In the 3GPP specification both the main channel and adjacent channels are required to be filtered with RRC Root Raised Cosine filters Adjacent Channel Power Measure of the signal power leaking into nearby channels Advanced Params Tab The Advanced Params tab specifies additional parameters that control the dem
214. to the next higher peak value The peak value here refers to the numeric value of the peak amplitude Thus when repeatedly moving the marker it can move to the right or left depending on the location of the next higher value Displays hides the marker table from the display Ey Removes the Marker Toolbar from the display Status Bar 74 The Status Bar displays information on specific instrument settings It contains only status information it does not display any error information The Status bar has no controls It can be hidden Elements of the Status Bar Area within Bar Description Run Status Displays the running state For example some run states are Acquiring Analyzing Ready or Stopped Status message area Displays status messages for example Data from ADC Overrange When there no status messages to report displays current acquisition parameters for example Acq Length 22 320 us Acquisition parameters Displays parameters of the acquisition such as acquisition bandwidth and acquisition length Scope Sample Rate Displays the oscilloscope sample rate for example 25 00 GS s SignalVu Vector Signal Analysis Software Printable Online Help Reference Run Status Indicators Run Menu Indicator Description Acquiring The analyzer is capturing the signal Analyzing The analyzer has captured the signal and is processing the signal record Replaying The analyzer is analyzing
215. tt et otto teas eet ab et co dr enu 174 Focal Oscillator E 3 22 22 to pietre a ii 174 Mak EE ERES REIS CERE RE PERRO QE EROR MERE ERR RE ELENA 174 Mari ED 174 MCPR Multiple Carrier Power Rati0 oooooocooccoonconccnonccnccnonconnr non ro nr messen 174 Min Hold nara sr be GER RU TO AA ERR RE ERR RE PETRA 175 Moditlate M LT 175 Modulating Signal sosirea eee esee she he eme se ehe sehe sene enne 175 MO RIEDIIER RA IPIE 175 Uc EE 175 Noise Bandwidth NB Wisin 175 Noise Flat OS e ERRAT Ret RR RR A tes Maiti mean eee es 175 Occupied Bandwadth 5 2 12 9 A Ea eR pec ebd ale e e ne RR PS 176 SIMPEL 176 SignalVu Vector Signal Analysis Software Printable Online Help vii Table of Contents Index viii Qe u CE 176 jl 176 uina cq UU 176 a DE ITLE 176 DAM A id 176 Real Inng Analysls vai 177 Real Time B ndwadth iie ere dos 177 Real Time Seamless Capture 00 cece cece nce no nn non ron rr e e ese eme ese e eese nnne 177 Reference Le linia A ss 177 Residual EM Incidental EM id a 177 Residual Response ii iia 177 hj 177 Nsvwntiwalidblic de MM HET 178 O EET 178 Shape Factor Skirt Selectivity sn A es Gn edu a Pret d de Ed 178 SIE 178 E RAN 178 Span per Division Span Disc a iii 178 SPECIAL islas 179 NIU Du OA 179 Spectrum Analysis ease eee nee bas eae E aed une
216. u Vector Signal Analysis Software Printable Online Help 83 Reference Constellation Display Settings Settings tab Description Freq 4 RBW see page 114 Specify the frequency and resolution bandwidth used for the ACPR measurement Measurement Params see Specify several parameters that control the measurement such as channel filter chip page 122 rate averaging and correcting for noise floor Channels ACPR see This tab specifies the BW and offset parameters of the Channels for the selected ACPR page 101 measurement Scale see page 145 Specifies the vertical and horizontal scale settings Prefs see page 130 Specifies whether certain display elements are visible Restore Defaults button Sets parameters for a 1 channel WCDMA measurement Constellation Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Constellation view are shown in the following table Settings tab Description Specifies the type of modulation used for the input signal and other parameters Modulation see page 123 Advanced Params see page 95 Specifies additional parameters Find see page 113 Used to set parameters for finding a burst within the data record and for entering a Synch word Contains parameters that define the portion of the acquisition record that is used for Analysis Time see page 97 analysis Also all
217. ument was unable to find any complete pulses in the signal m Make sure the analysis length see page 96 includes at least one complete pulse cycle from before one rising edge until after the next rising edge Pulse Detection Error The instrument was unable to detect a pulse m The pulse Measurement Filter see page 128 needs to be smaller Try reducing the bandwidth and or selecting the Gaussian filter m Detection threshold is not set to the proper level for the signal Adjust the Power threshold to detect pulses see page 128 B The pulse interval is too long for the current settings Try decreasing the filter bandwidth see page 128 as this may reduce the number of data points to a manageable quantity RBW conflict Increase Span or Analysis Length The measurement is not running because the actual RBW used by the measurement is too large for the current acquisition span Typically the analysis length is too short as well B Either increase the span or increase the Analysis Length RBW decreased The current span or acquisition bandwidth is too small to allow a wider RBW filter B Increase the span or acquisition bandwidth if the decreased RBW is not acceptable RBW increased The current Spectrum Length or Analysis Length 1f Spectrum Length is not Independent is too small to allow the requested RBW E Increase the Spectrum Length or Analysis Length if the increased RBW is not acceptable RBW limited by A
218. un Ref int Atten 1S dB Preamp Off The following table details the entries in the results table Heading Description Ch Identifies the adjacent channels Adjacent channels are numbered according to their offset from the Main channel The closest channel is numbered 1 The next closet channel is numbered 2 and so forth Offset The offset is the difference in frequency between the Measurement Frequency and the center frequency of the channel Lower Displays the ratio of the lower adjacent channel power to the Power Reference Upper Displays the ratio of the upper adjacent channel power to the Power Reference Power Reference The result of averaging the Main Channels together excluding inactive channels Depending on the number of adjacent channels to see all the measurements you might need to drag the divider bar between the main display and the results table at the bottom of the window to change the height of the results table Setting MCPR Measurement Parameters see page 122 Occupied BW amp x dB BW Display The Occupied BW display shows the bandwidth within which 99 a user defined value the default is 99 of the power transmitted falls within the measurement bandwidth 34 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Occupied BW amp x dB BW Display To show the Occupied BW display 1 Press the Displays button or select Setup gt Displays 2 In the Select Dis
219. ussian The Bandwidth control is enabled for you to specify a value The instrument uses an acquisition bandwidth two times wider than the entered value Power threshold to detect pulses Specifies the minimum power level the trace must exceed to be detected as a pulse The range for this setting is 0 to 70 dBc The setting resolution is 1 dB The default value is 10 dB Max number of pulses If the Analysis Time contains fewer pulses than specified the analyzer will measure all the pulse within the analysis time If there are more pulses in the Analysis Time than the specified number the analyzer measures the specified number of pulses and ignores the rest The range for this setting is 1 1000 The setting resolution is 1 If this setting is not checked the analyzer will measure all pulses within the Analysis Time up to a maximum of 1000 pulses Peak Markers Menu Selecting Peak from the Markers menu moves the selected marker to the highest level peak within the acquisition record Peak Average Ratio Pk Avg Measurement CCDF Display Ratio of the peak power in the transmitted signal to the average power in the transmitted signal located in the CCDF display Peak Power Measurement Pulsed RF Display The Peak Power measurement shows the maximum power during pulse on SignalVu Vector Signal Analysis Software Printable Online Help 129 Reference Topics Phase Deviation Measurement Phase Deviation Measurement The ph
220. ved to a file Selected VBW does not use full Spectrum Length This message can occur when the Spectrum Length is greater than required for the VBW filter If you look at the Time Overview display the Magenta line for Results Length indicates the part of the Spectrum Length that was actually used The measurement results are correct but don t include some of the data in the selected Spectrum Length To clear this message you can set the Spectrum Length to Auto Setup error description of error When this message appears it includes text that explains the problem For example the ACPR display might show Setup error channels can t overlap Setup errors are the result of conflicts in instrument settings These types of errors occur when a user makes manual changes to settings In the example above the channel settings in the Channel Power and ACPR display have been set so that the channels overlap in frequency B Adjust the instrument settings or change a setting back to Auto to eliminate the error Setup error Integration BW exceeds MeasurementBW When this message appears it includes text that explains the problem Setup errors are the result of conflicts in instrument settings These types of errors occur when a user makes manual changes to settings m Adjust the instrument settings or change a setting back to Auto to eliminate the error Setup error Measurement time for Freq amp Phase results SignalVu Vector Signal Analy
221. will be analyzed To specify which oscilloscope channel is analyzed 1 Select Settings gt Acquire to display the Acquire control panel 2 Select the channel you want to analyze using the Channel drop down list 3 Use the oscilloscope functions to achieve a stable triggered signal SignalVu Vector Signal Analysis Software Printable Online Help 5 Comnecting Signals Connecting Signals and Selecting the Analysis Channel 6 SignalVu Vector Signal Analysis Software Printable Online Help Taking Measurements Measurements Measurements The automatic measurements available include RF power measurements digital modulation measurements and pulse measurements Power measurements Measurement Description Channel Power The total RF power in the selected channel located in the ACPR display Adjacent Channel Power Ratio Measure of the signal power leaking from the main channel into adjacent channels Multi Carrier Power Ratio The ratio of the signal power in the reference channel or group of channels to the power in adjacent channels Peak Avg Ratio Ratio of the peak power in the transmitted signal to the average power in the transmitted signal located in the CCDF display CCDF The Complementary Cumulative Distribution Function CCDF CCDF shows how much Modulation measurements Measurement time a signal spends at or above a given power level relative to the average power of a measured signal
222. with a recalled oscilloscope waveform file you should recall the file again rather than using Replay Single Sequence see page 76 Selects the single sequence acquisition mode This is only a mode selector it does not initiate an acquisition Continuous see page 77 Selects the continuous acquisition mode Selecting Continuous does initiate acquisitions Run Menu Bar Run gt Run Application Bar Run Selecting Run begins a new acquisition measurement cycle SignalVu Vector Signal Analysis Software Printable Online Help 75 Reference Resume Resume Menu Bar Run gt Resume Restarts data acquisition but does not reset accumulated results such as Average or MaxHold This allows you to stop acquisitions temporarily then continue If the accumulation is already complete for example 10 acquisitions or 10 averages have already been completed each subsequent Resume command will cause one more acquisition to be taken and its results added to the accumulation Not available if instrument settings have been changed Abort Menu Bar Run gt Abort Selecting Abort immediately halts the current acquisition measurement cycle In process measurements and acquisitions are not allowed to complete Replay Menu Bar Run gt Replay Selecting Replay causes the current measurement to be rerun using the existing acquisition data Single Sequence Menu Bar Run gt Single Selecting Single sets the
223. wn in the following table Settings tab Description Measurements see page 122 Selects the measurements to be show in the Pulse Table Params see page 128 Specifies several parameters that control how pulses are counted and defined Define see page 110 Specifies parameters that control where measurements are taken on a pulse Levels see page 118 Specifies parameters that control the method and levels used to calculate some pulse values Freq Estimation see page 115 Specifies the reference used for computing frequency errors Pulse Trace Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for the Pulse Trace display are shown in the following table 88 SignalVu Vector Signal Analysis Software Printable Online Help Reference Restoring Default Settings Settings tab Description Params see page 128 Specifies several parameters that control how pulses are counted and defined Define see page 110 Specifies parameters that control where measurements are taken on a pulse Levels see page 118 Specifies parameters that control the method and levels used to calculate some pulse values Freq Estimation see page 115 Specifies the reference used for computing frequency error Scale see page 143 Specifies the vertical and horizontal scale settings Prefs see page 130 Specifies whether on not certain display elements are s
224. y are shown in the following table Settings tab Freq Span see page 115 Description Sets the frequency and span parameters Trace see page 151 Sets the trace display parameters Scale see page 142 Sets the Vertical and Horizontal scale and offset parameters Prefs see page 130 Specifies whether certain display elements are visible SignalVu Vector Signal Analysis Software Printable Online Help 87 Reference Pulse Statistics Display Settings Pulse Statistics Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The settings for the Pulse Statistics Display are shown in the following table Settings tab Description Params see page 128 Specifies several parameters that control how pulses are counted and defined Define see page 110 Specifies parameters that control where measurements are taken on a pulse Levels see page 118 Specifies parameters that control the method and levels used to calculate some pulse values Freq Estimation see page 115 Specifies the reference used for computing frequency errors Scale see page 143 Specifies the vertical and horizontal scale settings Prefs see page 130 Specifies whether or not certain elements of the display are shown Pulse Table Display Settings Menu Bar Setup gt Settings Application Toolbar Settings The Setup settings for the Pulse Table Display are sho
225. y employed to transform time domain signals into frequency domain spectra There is an assumption inherent in the mathematics of Discrete Fourier Transforms that the data to be processed is a single period of a periodically repeating signal The discontinuities between successive frames will generally occur when the periodic extension is made to the signal These artificial discontinuities generate spurious responses not present in the original signal which can make it impossible to detect small signals in the presence of nearby large ones This phenomenon is called spectral leakage Applying a filter such as Kaiser to the signal to be transformed is an effective method to combat the spectral leakage problem Generally the filter has a bell shape Multiplying the transform frame by the filter function eliminates or reduces the discontinuities at the ends of the frame however at the expense of increased RBW Filter Shape Characteristics The choice of filter shape depends on its frequency response characteristics such as side lobe level equivalent noise bandwidth and maximum amplitude error Use the following guidelines to select the best filter shape Filter Shape Characteristics Kaiser RBW Best side lobe level shape factor closest to the traditional Gaussian RBW 6dB RBW MIL These filters are specified for bandwidth at their 6 dB point as required by military EMI regulations CISPR These filters comply with the requi
226. y point is compared to the previous minimum value and the lesser value is retained for display and subsequent comparisons Saving Traces To save a trace for later analysis 1 Select the Save Trace As button This displays the Save As dialog box Saven gt Screen Captures O Name fjMuspesk 1 48240GMr 1 40 lt a Fie name My Nermorx Save as type 2 Navigate to the desired folder or use the default 3 Type a name for the saved trace and click Save Recalling Traces You can recall a previously saved trace for analysis or comparison to a live trace To select a trace for recall 1 Select the trace into which the recalled trace will be loaded from the Trace drop down list 2 Check the Show checkbox 3 Click the button to display the Open dialog box 164 SignalVu Vector Signal Analysis Software Printable Online Help Reference Topics Units Tab Show recalled trace LJ 4 Navigate to the desired file and click Open 5 Check the Show Recalled Trace checkbox 6 Verify that the trace s Show checkbox is selected either on this tab or next to the drop down list located at the top left corner of the graph Units Tab The Units tab specifies the global Amplitude units for all the views in the analysis window ann Analss Time Spectrum Time Frequency Unts Amplitude der Y note select m units when using antenna table Vertical The SignalVu software analyzes only one signal
227. you to pan a zoomed trace without changing the Measurement Frequency Offset is only enabled when the span as specified by Freq div is less than the acquisition bandwidth Autoscale Resets the scale of the horizontal axis to contain the complete trace SignalVu Vector Signal Analysis Software Printable Online Help 145 Reference Topics Scale Tab Spectrogram Display Scale Tab Spectrogram Display The Scale tab allows you to change the vertical and horizontal scale settings and set the color scheme used for the spectrogram trace Freg 4 Span BY Trace Scale Prefs Scale 0 Scale 5 00 MHz Color Tempe e Y Offset 0 Offset 1 49943 GHz Max 0 dBm M nae A Autoscale Autoscale Min 100 d8r Setting Description Vertical Time Scale Changes the vertical scale or the length of time shown in the graph The most recent acquisition appears at the bottom of the graph Offset Offset adjusts which of the lines is placed at the bottom position in the graph Autoscale Resets the scale of the vertical axis to contain the complete trace for one acquisition Allow Overlap Allows the use of overlapped frequency transforms Horizontal Frequency Scale Allows you to change the range of frequencies shown in the graph without changing the span or measurement frequency Offset Allows you pan the graph Autoscale Resets Scale to the Span setting Color Power Color Displays a drop down l

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