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R&S®FSWP-B1 I/Q Analyzer User Manual

1. 9 2 4 Starting the I Q Analyzer Appltcatton uk EEEEEE EENEG 9 2 2 Understanding the Display Information cccccomccononoononccnncnnnnnnnnnnnnnnnannnnnnnnennnnnnns 10 3 Measurement and Result Displays eee 13 4 Basics on UO Data Acquisition and Processing 18 4 1 Processing Analog UO Data from RF Input eese nen 18 4 2 Receiving Data Input and Providing Data Output eene 22 4 3 VQ Data Import and Export eerie innen ern nhanh ENEE EEN 24 44 Basics on FF lisina Edge ees gege 25 45 IQ Analyzer in MSRA Operating Mode eeeeeeennnnene nennen 31 E e e E c ia 33 5 1 Configuration Overvlew EEN 33 5 2 Import Export Functions e eeeeeeeeeseeeee nana nenrnnn nono nono nnn nu nur rrr RER EE nnn 35 5 3 Configuring Data Inputs and Outputs ek NENNEN EEN 36 5 4 Configuring the Amplitude eeeeeeeeseeeeseeeseeeseeee enne nnne nnn nnn nn nnn nnn 40 5 5 Configuring Frequency Characteristics ecce ene 44 5 6 Configuring Triggered Measurements eese 46 5 7 Data Acquisition and Bandwidth Settings eese 50 5 8 Display Configuration SEENEN EEEEEE EENEG 57 5 9 Adjusting Settings Automattcally REENEN 57 BEEN 60 7 How
2. EIMT 74 Dro dalssyr EE 75 CALCulate n IQ MODE lt EvalMode gt This command defines whether the captured UO data is evaluated directly or if it is converted via FFT to spectral or time data first n is irrelevant It is currently only available for UO Analyzer applications in multistandard mode not the MSRA Master Parameters lt EvalMode gt TDOMain Evaluation in time domain zero span FDOMain Evaluation in frequency domain IO Evaluation using UO data INSTrument CREate DUPLicate This command duplicates the currently selected measurement channel i e creates a new measurement channel of the same type and with the identical measurement set tings The name of the new channel is the same as the copied channel extended by a consecutive number e g IQAnalyzer IQAnalyzer2 The channel to be duplicated must be selected first using the INST SEL command This command is not available if the MSRA Master channel is selected Example INST SEL PhaseNoise INST CRE DUPL Duplicates the channel named PhaseNoise and creates a new measurement channel named PhaseNoise 2 Usage Event INSTrument CREate NEW lt ChannelType gt lt ChannelName gt This command adds an additional measurement channel The number of measurement channels you can configure at the same time depends on available memory Parameters lt ChannelType gt lt ChannelName gt Example Activating UO
3. 1 Q parameter XML Filters Bandwidth l Q dat ee sunset 52 Equalizer erm cas eee 18 High pass remote niei 92 High pass RF input YIG remole EE Format Dataren eege ee 133 Data remote et Free Run E 47 Frequency Configuration softkey I EE G Gating WC E OT 109 le Tee 47 H Hardware settings Displayed E 11 High pass filter EE le E ER SIDEN re creer dee 38 Hysteresis Lower Auto level MIOS cc cec Upper Auto level l 1 Q Analyzer Data ACQUISITION EE 18 Evaluation UO Vector evaluation risorse nnna 15 Magnitude evaluation isss siiciissisassrcinii inansa 13 Maximum bandwidth 19 sc 70 Programming example 130 131 Real Imag I Q evaluation sssssssssse 15 Results noning terns 13 sample TALS better o tex te See 19 Speetr m evaluatlori n tendra rere entr hr ei peas 14 1 Q data Analog procESSING src i en rre de Export file binary data description Export file parameter description Exporting ioco dis Exporting Importihg same itte trot rot citt es File format description ioter uer le acia Importing Exporting Input files Maximum bandwidth eM Sample rate ararnar e rires Trigger point in sample TPIS sssse 117 A irana dinaa 61 UO gating Edge triggered A O 109 Level triggered eee erre et 109
4. If the window length is longer than the Record Length that is not enough samples are available a window length the size of the Record Length is used for calculation The window length and the Window Overlap determine how many FFT calculations must be performed for each record in averaging mode see Transformation Algorithm on page 53 Frequency Resolution of FFT Results RBW The resolution bandwidth defines the minimum frequency separation at which the individual components of a spectrum can be distinguished Small values result in a high precision as the distance between two distinguishable frequencies is small Higher values decrease the precision but increase measurement speed The RBW is determined by the following equation Sample Rate Window Length Definition of RBW 4 1 RBW Normalized Bandwidth a Note The normalized bandwidth is a fixed value that takes the noise bandwidth of the window function into consideration The maximum RBW is restricted by the Analysis Bandwidth or by the following equa tion whichever is higher RBW liana Sample Rate reel User Manual 1177 5856 02 02 29 4 4 5 Basics on FFT If a higher spectral resolution is required the number of samples must be increased by using a higher sample rate or longer record length The minimum achievable RBW depends on the sample rate and record length accord ing to the following equation RBW NormalizedBandwidth
5. Settings Frequency 13 25 GHz RBW 20 0 MHz Trigger Source Trigger In Out Gated Trigger Source Ext Trigger 1 D Gate Mod Level LAN ate Mode Gate Length Conventional gating as in the Spectrum application is not available for the UO Ana lyzer however a special gating mode is available in remote control see chap ter 8 6 10 Configuring Gated Measurements on page 109 For step by step instructions on configuring triggered measurements see the R amp S FSWP User Manual Functions to configure trigger output described elsewhere e Trigger 1 2 on page 39 The remote commands required to configure triggered measurements are described in chapter 8 6 8 Configuring Trigger on page 103 e aa a E ONSA 47 GE 47 L Ext Tigger Wii 47 M i E 47 So A E TAE PEE 48 E E A 48 EE 48 Dur m PEE 49 dieat 49 Ixepeutton Be 49 User Manual 1177 5856 02 02 46 Configuring Triggered Measurements IGOR OMS M A A Aaa E E EE 49 ek 49 Bree e NE 50 TOG ROON MS T 50 Soo MH 50 Trigger Source Selects the trigger source If a trigger source other than Free Run is set TRG is dis played in the channel bar and the trigger source is indicated For gated measurements this setting also selects the gating source Remote command TRIGger SEQuence SOURce on page 106 Free Run Trigger Source No t
6. The following rule applies sample rate analysis bandwidth 0 8 Data Acquisition and Bandwidth Settings For details on the dependencies see chapter 4 1 1 Sample Rate and Maximum Usa ble UO Bandwidth for RF Input on page 19 Remote command TRACe IQ SRATe on page 117 Analysis Bandwidth Defines the flat usable bandwidth of the final I Q data This value is dependent on the defined Sample Rate and the defined signal source The following rule applies analysis bandwidth 0 8 sample rate Remote command TRACe IQ BWIDth on page 115 Meas Time Defines the UO acquisition time By default the measurement time is calculated as the number of UO samples Record Length divided by the sample rate If you change the measurement time the Record Length is automatically changed as well For details on the maximum number of samples see also chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input on page 19 Remote command SENSe SWEep TIME on page 82 Record Length Defines the number of UO samples to record By default the number of measurement points is used The record length is calculated as the measurement time multiplied by the sample rate If you change the record length the Meas Time is automatically changed as well Note For the UO vector result display the number of UO samples to record Record Length must be identical to the number of trace points to be displayed Measure
7. Channel 2 Complex sample 2 Example Element order for complex cartesian data 1 channel This example demonstrates how to store complex cartesian data in float32 format using MATLAB Save vector of complex cartesian I Q data i e iqiqiq N 100 iq randn 1 N 13 randn 1 N fid fopen xyz complex float32 w for k 1 length iq fwrite fid single real iq k float32 fwrite fid single imag iq k float32 end fclose fid List of Remote Commands UO Analyzer SENSE JADJUSTAL cm 118 SENSe JADJust GONFigure DUR Ati ria o 119 SENSe ADJust CONFigure DURation MODE 2 non ener t nent 119 SENSe ADJust CONFigure HYS Teresis LOWer oce rrr rnnt rn da ha rh cierran 119 SENSe JADJust CONFigure H YS Teresis UPPer is ccr ter habebo Un Eb ERE exe Rees Cb edi Leo CER RM eR 120 SENSe ADJust CONFigure TRIG s SENSe ADJust F REQUGRCy n rerit ette ri tente rn ee ra in ne Fee PUE EENS SENSeJADJUSELEV E SENSe JAVERag COUN LEE SENSE AVERa EE MR eorr reet tenete ren ted rer E rh ea edere one ep Lure oan ISENS J FREQUENCY CENTERS sr a a SENSe JFREQuency CENTer STEP ici i nere e ire e ea E EE Preis 101 SENSe FREQuency CENTer STEP AU TOs oin retener eth da tae REESE S 102 SENSE FREQUENCY E 102 SENS amp IQ BANDwidth BWIDth MOBDE uror e reo rco reet a 112 SENSe IQ BANDwWidth BWIDth RESOIUtIOn tege te rH re a Maines 112 SENSe IQ FFT A
8. If the defined FFT Length is larger than the record length zeros are appended to the captured data to reach the FFT length Fig 4 4 FFT parameters for single FFT calculation Averaging In averaging mode several overlapping FFTs are calculated for each record the results are combined to determine the final FFT result for the record The number of FFTs to be combined is determined by the Window Overlap and the Window Length Fig 4 5 FFT parameters for averaged FFT calculation 4 5 UO Analyzer in MSRA Operating Mode The I Q Analyzer can also be used in MSRA operating mode The MSRA Master chan nel is implemented as an UO Analyzer application Only this channel captures data in MSRA mode Thus the functions and settings described for data acquisition in the UO Analyzer application also apply to the MSRA Master Furthermore the UO Analyzer can be used to analyze data in MSRA mode Thus the result displays and analysis functions provided by the UO Analyzer can also be used in MSRA mode Note that the available functions and settings for the I Q Analyzer in MSRA mode vary depending on whether the MSRA Master channel or an UO Analyzer application chan nel is selected For example data acquisition settings for an UO Analyzer application channel in MSRA mode configure the analysis interval not an actual data capture from the input signal And measurements in the time and frequency domain are only availa ble in an UO Analyzer a
9. It is recommended that the filename uses the following convention lt xyz gt lt Format gt lt Channels gt ch lt Type gt e xyz a valid Windows file name e Format complex polar or real see Format element e Channels Number of channels see NumberOfChannels element e Type float32 float64 int8 int16 int32 or int64 see DataType element Examples xyz complex 1ch float32 e xyz polar 1ch float64 e xyz real 1ch int16 e xyz complex 16ch int8 UserData Optional contains user application or device specific XML data which is not part of the iq tar specification This element can be used to store additional information e g the hardware configuration User data must be valid XML content PreviewData Optional contains further XML elements that provide a preview of the UO data The preview data is determined by the routine that saves an iq tar file e g R amp S FSWP For the definition of this element refer to the RsIqTar xsd schema Note that the preview can be only displayed by current web browsers that have JavaScript enabled and if the XSLT stylesheet open IgTar xml file in web browser xslt is available Example ScalingFactor UO Data File Format iq tar Data stored as int16 and a desired full scale voltage of 1 V ScalingFactor 1 V maximum int16 value 1 V 215 3 0517578125e 5 V Example PreviewData in XML lt PreviewData gt lt ArrayOfChannel lengt
10. ADJust LEVel This command initiates a single internal measurement that evaluates and sets the ideal reference level for the current input data and measurement settings This ensures that the settings of the RF attenuation and the reference level are optimally adjusted to the signal level without overloading the R amp S FSWP or limiting the dynamic range by an S N ratio that is too small Example ADJ LEV Usage Event Manual operation See Setting the Reference Level Automatically Auto Level on page 42 8 6 13 Configuring the Result Display DISPLAY e E 121 DISPlayEWINDOWSNS SIZE coord 122 LAY Out ADD WINDOW lt a 122 LAYout CATalog WINDoOW EENENEEEEEESREEEREEERSEEEEEEREEEEREEEEEEEEENNNEERSENENEEEERRENEN KEEN 123 Bd Deler 123 LAYout e Elle ect 124 LAYout REPLaceE WINDOW ener dd 124 LA YOURS PIG m e 124 LAYoutWINDOWSRBPeADEDT E 126 LAY cut WINDowsmeDENH conocia 126 LAYout WINDow n REMowve eesssssssssseseseseeeennnnennnenrtre rere naniii nt nn nana nana 127 LAYoutWINDow snh eREPLace ro ici a eu dev eg Ern a cada 127 DISPlay FORMat Format This command determines which tab is displayed Parameters Format SPLit Displays the MultiView tab with an overview of all active chan nels SINGIe Displays the measurement channel that was previously focused RST SING Example DISP FORM SPL Configuring UO
11. Comment Channel 1 of 1 Power vs time y axis 10 dB div x axis 1 ms div Spectrum y axis 20 dB div x axis 500 kHz div E mail info rohde schwarz com Internet http Avww rohde schwarz com Fileformat version 1 Introduction 8 Remote Commands for the l Q Analyzer The following commands are specific to performing measurements in the UO Analyzer application in a remote environment The R amp S FSWP must already be set up for remote operation in a network as described in the base unit manual e PER 65 e COMMON SUMO 70 e Activating UO Analyzer Measurement enn nennen 70 e Performing Meas rements iseeecueeeeeeee screening nha pane tnt o En Ie a e ER Ren Een 75 e JRetievitig Resulls orco etr a c awd 83 e Configuring UC Analyzer Measurements coccion nica rc 91 e Ee e icc E 127 e Importing and Exporting UO Data 128 e Querying the Status Registers iterom ea 129 e Programming Giele 130 8 1 Introduction Commands are program messages that a controller e g a PC sends to the instru ment or software They operate its functions setting commands or events and request information query commands Some commands can only be used in one way others work in two ways setting and query If not indicated otherwise the com mands can be used for settings and queries The syntax of a SCPI command consists of a
12. Outputs measurement value of delta marker 2 Usage Query only CALCulate lt n gt MARKer lt m gt X Position This command moves a marker to a particular coordinate on the x axis If necessary the command activates the marker If the marker has been used as a delta marker the command turns it into a normal marker Parameters Position Numeric value that defines the marker position on the x axis The unit depends on the result display Range The range depends on the current x axis range Example CALC MARK2 X 1 7MHz Positions marker 2 to frequency 1 7 MHz Manual operation See Marker Table on page 16 See Marker Peak List on page 16 CALCulate lt n gt MARKer lt m gt Y This command queries the position of a marker on the y axis If necessary the command activates the marker first To get a valid result you have to perform a complete measurement with synchroniza tion to the end of the measurement before reading out the result This is only possible for single measurement mode Return values lt Result gt Result at the marker position The unit is variable and depends on the one you have currently set In the Real Imag I Q result display of the UO Analyzer the command returns the real part first then the imaginary part 8 6 8 6 1 Configuring UO Analyzer Measurements Example INIT CONT OFF Switches to single measurement mode CALC MARK2 ON Switches marker 2 INIT WAI Star
13. Q Data X N 512k I Data X N 512k Q Data Fig 1 1 I Q data formats Note 512k corresponds to 524288 samples For maximum performance the formats Compatible or IQPair should be used Fur thermore for large amounts of data the data should be in binary format to improve performance In binary format the number of l and Q data can be calculated as follows af DataBytes ofi Data of Q Data 3 For the format QBLock the offset of Q data in the output buffer can be calculated as follows Hof DataBytes Q Data Offset 2 t LengthindicatorDigits with LengthIndicatorDigits being the number of digits of the length indicator including the In the example above 41024 this results in a value of 6 for LengthIndica torDigits and the offset for the Q data results in 512 6 518 UO Data File Format iq tar A 3 I Q Data File Format iq tar A 3 1 UO data is packed in a file with the extension iq tar An iq tar file contains UO data in binary format together with meta information that describes the nature and the Source of data e g the sample rate The objective of the iq tar file format is to separate UO data from the meta information while still having both inside one file In addition the file format allows you to preview the UO data in a web browser and allows you to include user specific data The iq tar container packs several files into a single tar archive file Files in
14. UO measurements M tliodS rer tret reto ren nns 75 UO Power MM 48 Trigger level remote sese 105 UO Vector Evaluatiori method ettet 15 UO Analyzer Y axis scaling IF Power Bra 47 Trigger level remote sees 105 Impedance REMOTE e M 93 A S 37 Importing eh EI 24 33 36 62 135 fence 36 Inherent noise Le TE E 43 Input teres M 37 Coupling remote 4 92 Overload iiris 2 22 Overload remote 4 92 pz E 37 Signal paramieters eret terrenis 22 Input sample rate ISR A A 19 Input sources V idata EEN 22 EU ue EE 9 IQBlock VO EE TEE 133 IQPair ee UE 133 K Keys LINES not used RUN CONT R N SINGLE 2 iom e portes ste Side L Level Tiriggered gate cro edere eth tv ven tret c a 109 Lower Level Hystereslis civic ari 59 M Magnitude Evaluation Method ee tte 13 re Analyzer ei e decr ene es 13 Marker table Evaluatiori meth d sissi reme 16 Markers Querying position remote Retrieving results remote o Table evaluation method sss Maximizing Windows remote der ieiti 122 Meas Time hardware setting ssessssse 11 Measurement channel Creating remote iio 71 72 73 Deleting remote erien enra aneneen T2 Duplicating remote s Querying remote Bad R
15. but the longer the calculation takes In Auto or Manual mode an FFT length of 4096 is used In advanced FFT mode the FFT length can be defined by the user If you use the arrow keys or the rotary knob to change the FFT length the value is incremented or decremented by powers of 2 If you enter the value manually any integer value from 3 to 524288 is available R amp S9 FSWP B1 Basics on UO Data Acquisition and Processing 4 4 4 If the FFT length is longer than the Window Length the sample data is filled up with zeros up to the FFT length The FFT is then performed using interpolated frequency points For an FFT length that is not a power of 2 a DFT discrete Fourier transform is per formed which requires more time for calculation but avoids the effects of interpolation In order to display all calculated frequency points defined by the FFT length the num ber of measurement points is set to the FFT length automatically in advanced FFT mode Window Length Defines the number of samples to be included in a single window in averaging mode In single mode the window length corresponds to the Record Length on page 52 Values from 3 to 4096 are available in Manual mode in Advanced FFT mode val ues from 3 to 524288 are available However the window length may not be longer than the FFT Length If the window length is shorter than the FFT Length the sample data is filled up with zeros up to the FFT length
16. e g a mea surement window Numeric suffixes are indicated by angular brackets n next to the keyword 8 1 4 Introduction If you don t quote a suffix for keywords that support one a 1 is assumed Example DISPlay WINDow lt 1 4 gt ZOOM STATe enables the zoom in a particular mea surement window selected by the suffix at WINDow DISPlay WINDow4 ZOOM STATe ON refers to window 4 Optional Keywords Some keywords are optional and are only part of the syntax because of SCPI compli ance You can include them in the header or not Note that if an optional keyword has a numeric suffix and you need to use the suffix you have to include the optional keyword Otherwise the suffix of the missing keyword is assumed to be the value 1 Optional keywords are emphasized with square brackets Example Without a numeric suffix in the optional keyword SENSe FREQuency CENTer is the same as FREQuency CENTer With a numeric suffix in the optional keyword DISPlay WINDow 1 42 200M STATe DISPlay ZOOM STATe ON enables the zoom in window 1 no suffix DISPlay WINDow4 ZOOM STATe ON enables the zoom in window 4 Alternative Keywords A vertical stroke indicates alternatives for a specific keyword You can use both key words to the same effect Example SENSe BANDwidth BWIDth RESolution In the short form without optional keywords BAND 1MHZ would have the same effect as BWID 1MHZ
17. iq tar uses an ordered XML schema For your own implementation of the ig tar file format make sure to validate your XML file against the given schema The following example shows an UO parameter XML file The XML elements and attrib utes are explained in the following sections Q Data File Format iq tar Sample UO parameter XML file xyz xml lt xml version 1 0 encoding UTF 8 xml stylesheet type text xsl href open IqTar xml file in web browser xslt RS IQ TAR FileFormat fileFormatVersion 1 xsi noNamespaceSchemaLocation RsIqTar xsd xmlns xsi http www w3 org 2001 XMLSchema instance lt Name gt FSV K10 lt Name gt lt Comment gt Here is a comment lt Comment gt lt DateTime gt 2011 01 24T14 02 49 lt DateTime gt lt Samples gt 68751 lt Samples gt Clock unit Hz gt 6 5e 006 lt Clock gt lt Format gt complex lt Format gt lt DataType gt float32 lt DataType gt lt ScalingFactor unit V gt 1 lt ScalingFactor gt NumberOfChannels 1 NumberOfChannels DataFilename xyz complex float32 DataFilename lt UserData gt lt UserDefinedElement gt Example lt UserDefinedElement gt lt UserData gt lt PreviewData gt lt PreviewData gt lt RS_IQ TAR FileFormat gt Element Description RS IQ TAR File The root element of the XML file It must contain the attribute ileFormatVersion Format that contains the number of the file format definition Currently fileF
18. ment Points Thus the measurement points are not editable for this result display If the Record Length is edited the measurement points are adapted automatically For record lengths outside the valid range of measurement points i e less than 101 points or more than 100001 points the diagram does not show valid results Remote command TRACe IQ RLENgth on page 115 TRACe IQ SET on page 115 Swap UO Activates or deactivates the inverted UO modulation If the and Q parts of the signal from the DUT are interchanged the R amp S FSWP can do the same to compensate for it Data Acquisition and Bandwidth Settings On and Q signals are interchanged Inverted sideband Q j l Off and Q signals are not interchanged Normal sideband I j Q Remote command SENSe SWAPiq on page 114 RBW Defines the resolution bandwidth for Spectrum results The available RBW values depend on the sample rate and record length See chapter 4 4 4 Frequency Resolution of FFT Results RBW on page 29 Depending on the selected RBW mode the value is either determined automatically or can be defined manually As soon as you enter a value in the input field the RBW mode is changed to Manual This setting is only available if a Spectrum window is active If the Advanced Fourier Transformation Params option is enabled advanced FFT mode is selected and the RBW cannot be defined directly Note that the RBW is correl
19. 35 e Configuring Data Inputs and Outputs nos 36 e Configuring the Amplit de ecrire eere nnne tnnt rnnt npn nant 40 e Configuring Frequency Characteristics 4 eeieeeeiieeeeeeiiii eene na 44 e Configuring Triggered Measurements assise sett eed 46 e Data Acquisition and Bandwidth Gettnge AAA 50 e Display ConfIguretioh iiiciees cinese rennen Etna ct EEN ERR OPE Ed enne PRESS 57 e Adjusting Settings Automatically sese cnn 57 5 1 Configuration Overview NN Throughout the measurement channel configuration an overview of the most important n currently defined settings is provided in the Overview The Overview is displayed when you select the Overview icon which is available at the bottom of all softkey menus Overview Configuration Overview IQ Analyzer Center Freq Offset Freq Offset Trigger Gate L I Analysis Display Config Trace 1 or Select Measurement OT ORG 1 Magnitude In addition to the main measurement settings the Overview provides quick access to the main settings dialog boxes The individual configuration steps are displayed in the order of the data flow Thus you can easily configure an entire measurement channel from input over processing to output and analysis by stepping through the dialog boxes as indicated in the Overview The Overview varies depending on the application for detailed descriptions see t
20. Defines a fixed step size for the center frequency Enter the step size in the Value field Remote command SENSe FREQuency CENTer STEP on page 101 Frequency Offset Shifts the displayed frequency range along the x axis by the defined offset This parameter has no effect on the instrument s hardware or on the captured data or on data processing It is simply a manipulation of the final results in which absolute fre quency values are displayed Thus the x axis of a spectrum display is shifted by a constant offset if it shows absolute frequencies but not if it shows frequencies relative to the signal s center frequency A frequency offset can be used to correct the display of a signal that is slightly distorted by the measurement setup for example The allowed values range from 100 GHz to 100 GHz The default setting is O Hz Note In MSRA mode this function is only available for the MSRA Master Remote command SENSe FREQuency OFFSet on page 102 R amp S FSWP B1 Configuration 5 6 Configuring Triggered Measurements Trigger settings determine when the input signal is measured Trigger settings can be configured via the TRIG key or in the Trigger dialog box which is displayed when you select the Trigger button in the Overview External triggers from one of the TRIGGER INPUT OUTPUT connectors on the R amp S FSWP are configured in a separate tab of the dialog box Show Preview On or 1 Zero Span
21. E 1 Q Evaluation method Se SRate hardware setting A Status registers Querying remote EE 129 STAT QUES e EE 92 Suffixes COMMON m 70 Remote commahds metet neenon 66 Swap UO Ee Lii ed 2h dein uet 114 I r Tegemc c 52 Sweep Aborting si 56 57 eo M M 56 Performing remote ve ED Points I Q Analyzer ett teer ttes 55 rc 55 ifie remote ao ouo e tC EE e Ped ee 82 T Time trigger Repetition interval Softkey TPIS VQ Gate EP 117 Traces Retrieving remote enint 83 Trigger Configuration softkey sss 46 Drop out time 000 External remote 106 Holdoff 2 50 Eiter ugereest rec eed een ne Rada oe esa 49 OMS CL i oeste rate LI ee 49 oou dee 39 lee 50 105 Trigger level 49 External trigger remote 104 VQ Power remote A 105 IF Power remote A 105 RF Power remote AAA 105 Trigger source sss Ee VE FROG RUFI oce concertos cnica lid 1 Q Power 48 IF Power es AT Power Sensor 48 RF Power Te VE Troubleshooting Input overload rtt 92 U Units Reference level i e ere ter rex eiue tet 41 Upper Level Fysteresis oet netter titii 59 Usable UO bandwidth Definition User manuals User ports Remote Controls scr lbs 95 User sample rate Definition xz ico t eot rct iei 19 Ww Window
22. EGAT GAP 20 A J Sets the interval between gate periods to 20 samples RAC IQ EGAT NOF 2 E El Sets the number of gate periods after the trigger signal to 2 RIG SOUR IQP Defines the magnitude of the sampled I Q data to be used as a trigger TRIG LEV IQP 30dbm 3 Sets the trigger level TRAC IQ DATA WAI Performs a measurement and returns the RF input voltage at each sample point first 1000 I values then 1000 Q values TRAC IQ DATA MEM 0 500 Returns the first 500 samples of the stored trace data for the measurement For each sample first the I value then the Q value is listed TRAC IQ DATA MEM 500 500 Returns the second half of the 1000 captured sample values A A A 2 A 3 A 3 1 A 3 2 A 1 A 2 Formats for Returned Values ASCII Format and Binary Format Annex Reference Formats for Returned Values ASCII Format and Binary Format 133 Reference Format Description for UO Data Files eene 133 UO Data File Format iq tar 2 ceeccesceeeeceeeceeeeeeeeeeeseeseaeesaeeseeeeseeeneeeeneeeeeeeeeeaees 135 UO Parameter XML File Gpechhcation iaai a aaia 135 en Data Binay Files c oett ea te erect eder a eeu Pen baee Ru 139 Formats for Returned Values ASCII Format and Binary Format When trace data is retrieved using the TRAC DATA Or TRAC IQ DATA command the data is returned in the format defin
23. FSWP B1 Basics on UO Data Acquisition and Processing the data is used as an input source however the data acquisition settings in the cur rent application attenuation center frequency measurement bandwidth sample rate can be ignored As a result these settings cannot be changed in the current applica tion Only the measurement time can be decreased in order to perform measurements on an extract of the available data from the beginning of the file only When using input from an UO data file the RUN SINGLE function starts a single mea surement i e analysis of the stored UO data while the RUN CONT function repeat edly analyzes the same data from the file Sample iq tar files If you have the optional R amp S FSWP VSA application R amp S FSWP K70 some sample iq tar files are provided in the C R S Instr user vsa DemoSignals directory on the R amp S FSWP Furthermore you can create your own iq tar files in the I Q Analyzer see chap ter 7 2 How to Export and Import UO Data on page 62 Pre trigger and post trigger samples In applications that use pre triggers or post triggers if no pre trigger or post trigger samples are specified in the UO data file or too few trigger samples are provided to satisfy the requirements of the application the missing pre or post trigger values are filled up with zeros Superfluous samples in the file are dropped if necessary For pre trigger samples values are filled up or omitt
24. R amp S FSWP determines the signal level for optimal internal data processing and sets the required attenuation accordingly Parameters State ON OFF 0 1 RST 1 Example INP ATT AUTO ON Couples the attenuation to the reference level Usage SCPI confirmed Manual operation See Attenuation Mode Value on page 42 Configuring the Preamplifier INPUNGAIN VALUC EN 98 INGE GAINES TA E 98 INPut GAIN VALue lt Gain gt This command selects the gain level if the preamplifier is activated INP GAIN STAT ON see INPut GAIN STATe on page 98 The command requires the additional preamplifier hardware option Parameters lt Gain gt 15 dB 30 dB The availability of gain levels depends on the model of the R amp S FSWP R amp S FSWP8 15dB and 30 dB R amp S FSWP26 or higher 30 dB RST OFF Example INP GAIN VAL 30 Switches on 30 dB preamplification Usage SCPI confirmed Manual operation See Preamplifier on page 42 INPut GAIN STATe lt State gt This command turns the preamplifier on and off It requires the optional preamplifier hardware Parameters lt State gt ON OFF RST OFF 8 6 6 Configuring UO Analyzer Measurements Example INP GAIN STAT ON Switches on 30 dB preamplification Usage SCPI confirmed Manual operation See Preamplifier on page 42 Scaling the Y Axis DiSblavlfWiNDow nztTR ACectz Tt SCALel eene nennen nennen 99 DiSblavlfWiNDow nzTR ACectsvtSCALelAUlTOO
25. RF INPUT connector on the R amp S FSWP 1 Select the MODE key and select the I Q Analyzer application 2 Select the Overview softkey to display the Overview for an I Q Analyzer mea surement 3 Select the Input button to select and configure the RF Input signal source 4 Select the Amplitude button to define the attenuation reference level or other set tings that affect the input signal s amplitude and scaling 5 Select the Frequency button to define the input signal s center frequency 6 Optionally select the Trigger button and define a trigger for data acquisition for example an IQ Power trigger to start capturing data only when a specific power is exceeded 7 Select the Bandwidth button and define the bandwidth parameters for data acqui sition e Sample rate or Analysis Bandwidth the span of the input signal to be cap tured for analysis or the rate at which samples are captured both values are correlated How to Export and Import UO Data e Measurement Time how long the data is to be captured e Record Length the number of samples to be captured also defined by sam ple rate and measurement time 8 Select the Display Config button and select up to six displays that are of interest to you Arrange them on the display to suit your preferences 9 Exit the SmartGrid mode 10 Start a new sweep with the defined settings a Select the Sequencer icon E from the toolbar b Set the
26. Results esses 88 Retrieving Captured UO Data The captured UO data is output in the form of a list three different formats can be selected for this list see TRACe 10 DATA FORMat on page 84 For details on formats refer to chapter A 2 Reference Format Description for UO Data Files on page 133 e DATA Ne 83 TRACSIQIDA TA ORMAL E 84 TRACI TA MEMO EE 84 TRACe IQ DATA This command queries the captured data from measurements with the UO Analyzer To get the results the command also initiates a measurement with the current settings of the R amp S FSWP Note Using the command with the RST values for the TRACe 10 SET command the following minimum buffer sizes for the response data are recommended ASCII format 10 kBytes binary format 2 kBytes Return values Results Example Usage Retrieving Results Measured voltage for and Q component for each sample that has been captured during the measurement The number of samples depends on TRACe 10 SET In ASCII format the number of results is 2 the number of samples The data format depends on TRACe 10 DATA FORMat on page 84 Default unit V TRAC IQ STAT ON Enables acquisition of UO data TRAC IQ SET NORM 10MHz 32MHz EXT POS 0 4096 Measurement configuration Sample Rate 32 MHz Trigger Source External Trigger Slope Positive Pretrigger Samples 0 Number of Samples 4096 FORMat REAL 32 Selects for
27. SCPI Parameters Many commands feature one or more parameters If a command supports more than one parameter these are separated by a comma Example LAYout ADD WINDow Spectrum LEFT MTABle 8 1 6 1 Introduction Parameters may have different forms of values e N rneti6 E 68 e TIBOO ia si is 69 DAMES 63b NOE 69 Character e EE 69 e Bcn Sue HERE IEEE HEMDEN 69 Numeric Values Numeric values can be entered in any form i e with sign decimal point or exponent In case of physical quantities you can also add the unit If the unit is missing the com mand uses the basic unit Example with unit SENSe FREQuency CENTer 1GHZ without unit SENSe FREQuency CENTer 1E9 would also set a frequency of 1 GHz Values exceeding the resolution of the instrument are rounded up or down If the number you have entered is not supported e g in case of discrete steps the command returns an error Instead of a number you can also set numeric values with a text parameter in special cases e MIN MAX Defines the minimum or maximum numeric value that is supported e DEF Defines the default value e UP DOWN Increases or decreases the numeric value by one step The step size depends on the setting In some cases you can customize the step size with a corresponding command Querying numeric values When you query numeric values the system returns a number In case of physical quantities it ap
28. SEQuence HOLDO TIME E 103 TRlGoert GtOuencellEbower HOL Doft 103 TRIGger SEQuence IFPower HYSr Teresis eee cecinit eee eeixa setae pauca ana kon enini 104 TRIGger SEQuenceJ LEVel EXTernal port sss 104 TRIGger SEQuenceJ LEVel IFPower esses n nnn enne 105 TRiGgern SEQuence E ee EE 105 TRIGger SEQuence L EVelRFBOWSETF 1oiooei iecore anke e 105 TRiGger SEQuence e E 105 TRIGger SEQuence SOURC6 etit e nenne nnns nnns s str trt nia S 106 TRIGSger ee bag LAT EE 107 TRIGger SEQuence DTIMe lt DropoutTime gt Defines the time the input signal must stay below the trigger level before a trigger is detected again Parameters lt DropoutTime gt Dropout time of the trigger Range Osto10 0s RST 0s Manual operation See Drop Out Time on page 50 TRIGger SEQuence HOLDoff TIME Offset Defines the time offset between the trigger event and the start of the measurement Parameters Offset For measurements in the frequency domain the range is O s to 30 s For measurements in the time domain the range is the negative measurement time to 30 s RST 0s Example TRIG HOLD 500us Manual operation See Trigger Offset on page 49 TRIGger SEQuence IFPower HOLDoff Period This command defines the holding time before the next trigger event Configuring UO Analyzer Measurements Note that thi
29. Sequencer state to OFF c Select the RUN SINGLE key 7 1 2 How to Analyze Data in the UO Analyzer 1 Select the MODE key and select the I Q Analyzer application 2 Select the Overview softkey to display the Overview for an UO Analyzer mea surement 3 Select the Display Config button and select up to six displays that are of interest to you Arrange them on the display to suit your preferences 4 Exit the SmartGrid mode and select the Overview softkey to display the Over view again 5 Select the Analysis button in the Overview to make use of the advanced analy sis functions in the displays e Configure a trace to display the average over a series of sweeps on the Trace tab if necessary increase the Average Count e Configure markers and delta markers to determine deviations and offsets within the signal on the Marker tab 7 2 How to Export and Import UO Data UO data can only be exported in applications that process l Q data such as the l Q Analyzer or optional applications Capturing and exporting UO data 1 Press the PRESET key How to Export and Import UO Data 2 Press the MODE key and select the IQ Analyzer or any other application that supports UO data Configure the data acquisition Press the RUN SINGLE key to perform a single sweep measurement Select the El Save icon in the toolbar Select the I Q Export softkey In the file selection dialog box select a storage
30. TRIGger SEQuerice MME RINT tV l c trt ica ets 107 Index Symbols OT 103 A Aborting WE paca 56 57 ACIDE Coupling 5 2 adri 37 Activating l Q Analyzef EE 70 Amplitude fep M 44 Analysis Bandwidth me renes 52 Bandwidth definition wont rc 19 Interval MSRA co ricette zt ect re 51 Analysis lille iio re orit erre rro 32 Applications VQ Analyzer remote EE 70 Att hardware Seting vaciar ii 11 Attenuation PANU oo a a 42 Manual 42 Protective uus n 22 Protective remote pre citet te Geri 92 Auto adjustment Triggered measurement sisirin disiras 120 Auto all Auto Dien ET 58 Auto level LIII 59 Reference level si len E 42 59 Auto settings Meastime E 59 Meastime Mantal se rrr tret 59 E DT 56 B Bandwidth ULL c Extension options Jia gra EET Maximum usable nre eres Relationship to sample rate SONGS irren rte ni e eaa Branch for peak search l OQ Analyzer EE 60 C Capture time see also Measurement time eee ee eeeeeeeeeeee 82 Capturing UO data see Data acquisition ssuuus 75 ruine scenes exer u EENEN 45 Automatic configuration esssssee 58 Displayed Pp 11 Softkey 45 icr 45 Closing Channels remote xerit teretes Windows remote tinea Configuring Data acqui
31. The RBW is determined automatically depending on the sample rate and record length MANual The user defined RBW is used and the FFT window length and possibly the sample rate are adapted accordingly The RBW is defined using the SENSe IO BANDwidth BWIDth RESolution command FFT The RBW is determined by the FFT parameters RST AUTO Example IQ BAND MODE MAN Switches to manual RBW mode IQ BAND RES 120000 Sets the RBW to 120 kHz Usage SCPI confirmed Manual operation See RBW on page 53 SENSe IQ BANDwidth BWIDth RESolution Bandwidth This command defines the resolution bandwidth manually if SENSe 10 BANDwidth BWIDth MODE is set to MAN Defines the resolution bandwidth The available RBW values depend on the sample rate and record length For details see chapter 4 4 4 Frequency Resolution of FFT Results RBW on page 29 Parameters Bandwidth refer to data sheet RST RBW AUTO mode is used Example IQ BAND MODE MAN Switches to manual RBW mode IQ BAND RES 120000 Sets the RBW to 120 kHz Usage SCPI confirmed Manual operation See RBW on page 53 Configuring UO Analyzer Measurements SENSe IQ FFT ALGorithm Method Defines the FFT calculation method Parameters Method SINGIe One FFT is calculated for the entire record length if the FFT length is larger than the record length see SENSe IO FFT LENGth and TRACe IOQ RLENgth zeros are a
32. This command restores the default instrument settings in the current channel Use INST SEL to select the channel Example INST Spectrum2 Selects the channel for Spectrum2 SYST PRES CHAN EXEC Restores the factory default settings to the Spectrum2 channel Usage Event Manual operation See Preset Channel on page 35 TRACe IQ EVAL State This command turns UO data analysis on and off Before you can use this command you have to turn on the I Q data acquisition using INST CRE NEW IQ or INST CRE REPL or using the TRACe IQ STATe com mand to replace the current measurement channel while retaining the settings Parameters State ON OFF RST OFF Example TRAC IQ ON Enables UO data acquisition TRAC IQ EVAL ON Enables the UO data analysis mode Performing Measurements TRACe IQ STATe State This command changes the application of the current measurement channel to I Q Analyzer activating the simple UO data acquisition mode see chapter 8 3 Activating UO Analyzer Measurements on page 70 Executing this command also has the following effects e The sweep amplitude input and trigger settings from the previous application are retained e All measurements from the previous application e g Spectrum are turned off Alltraces are set to Blank mode e The I Q data analysis mode is turned off TRAC IQ EVAL OFF if previous applica tion was also I
33. Triggered Measurements For measurements on a fixed frequency e g zero span or UO measurements the third IF represents the center frequency This trigger source is only available for RF input The available trigger levels depend on the RF attenuation and preamplification A refer ence level offset if defined is also considered For details on available trigger levels and trigger bandwidths see the data sheet Remote command TRIG SOUR IFP see TRIGger SEQuence SOURce on page 106 UO Power Trigger Source This trigger source is only available in the UO Analyzer application and in applications that process UO data Triggers the measurement when the magnitude of the sampled UO data exceeds the trigger threshold The trigger bandwidth corresponds to the bandwidth setting for UO data acquisition See Analysis Bandwidth on page 52 Remote command TRIG SOUR IQP see TRIGger SEQuence SOURce on page 106 RF Power Trigger Source Defines triggering of the measurement via signals which are outside the displayed measurement range For this purpose the instrument uses a level detector at the first intermediate fre quency The input signal must be in the frequency range between 500 MHz and 8 GHz The resulting trigger level at the RF input depends on the RF attenuation and preampli fication For details on available trigger levels see the instrument s data sheet Note If the input signal contains frequenci
34. a trigger to capture data Alternatively the internal trigger signal used by the R amp S FSWP can be output for use by other connected devi ces Using the same trigger on several devices is useful to synchronize the transmitted and received signals within a measurement For details on the connectors see the R amp S FSWP Getting Started manual External trigger as input If the trigger signal for the R amp S FSWP is provided by an external reference the refer ence signal source must be connected to the R amp S FSWP and the trigger source must be defined as External for the R amp S FSWP Trigger output The R amp S FSWP can provide output to another device either to pass on the internal trigger signal or to indicate that the R amp S FSWP itself is ready to trigger The trigger signal can be output by the R amp S FSWP automatically or manually by the user If itis provided automatically a high signal is output when the R amp S FSWP has triggered due to a measurement start Device Triggered or when the R amp S FSWP is ready to receive a trigger signal after a measurement start Trigger Armed Manual triggering If the trigger output signal is initiated manually the length and level high low of the trigger pulse is also user definable Note however that the trigger pulse level is always opposite to the constant signal level defined by the output Level setting e g for Level High a constant high signal is output to th
35. activate using the MODE key on the front panel When you switch to an UO Analyzer measurement channel the first time a set of parameters is passed on from the currently active application After initial setup the parameters for the measurement channel are stored upon exiting and restored upon re entering the channel Thus you can switch between applications quickly and easily When you activate a measurement channel for the UO Analyzer application data acquisition from the input signal is started automatically with the default configuration It can be configured in the UO Analyzer Overview dialog box which is displayed when you select the Overview softkey from any menu The main configuration settings and dialog boxes are also available via the I Q Ana lyzer menu which is displayed when you press the MEAS CONFIG key The remote commands required to perform these tasks are described in chapter 8 6 Configuring UO Analyzer Measurements on page 91 Importing and Exporting UO Data The I Q data to be evaluated in the I Q Analyzer application can not only be captured by the UO Analyzer itself it can also be imported to the R amp S FSWP provided it has the correct format Furthermore the captured UO data from the UO Analyzer can be expor ted for further analysis in external applications For details see chapter 4 3 I Q Data Import and Export on page 24 e Configuration OVETVICW EE 33 e Import EXport FHDOGHODS 2 nne ad
36. complex values are interleaved pairs of and Q values and multi channel signals contain interleaved complex sam ples for channel 0 channel 1 channel 2 etc If the NumberOfChannels element is not defined one channel is presumed Example Element order for real data 1 channel I 0 Real sample 0 I 1 Real sample 1 I 2 Real sample 2 Example Element order for complex cartesian data 1 channel I 0 Q 0 Real and imaginary part of complex sample 0 I 1 0 11 Real and imaginary part of complex sample 1 I 2 Q 2 Real and imaginary part of complex sample 2 Example Element order for complex polar data 1 channel Mag 0 Phi 0 Magnitude and phase part of complex sample 0 Mag 1 Phi l Magnitude and phase part of complex sample 1 Mag 2 Phi 2 Magnitude and phase part of complex sample 2 Example Element order for complex cartesian data 3 channels Complex data I channel no time index Q channel no time index 0110 9101101 Channel 0 Complex sample 0 1 0 Q 1 0 Channel 1 Complex sample 0 21 0 1 Q 2 0 Channel 2 Complex sample 0 0 1 O 0 1 Channel 0 Complex sample 1 1 I 1 0 11 1 Channel 1 Complex sample 1 2 11 1 QI2 1 Channel 2 Complex sample 1 UO Data File Format iq tar I 0 1 2 Q 0 2 Channel 0 Complex sample 2 I 1 2 Q 1 2 Channel 1 Complex sample 2 I 2 2 Q12 2
37. data analysis using the I Q Analyzer in a remote environment e UO Analysis with Graphical Evaluation sss 130 e Basic HO Analysis with Improved Performance c cccecccceeeceeeeeeeeteteeeeeeneees 131 UO Analysis with Graphical Evaluation This example demonstrates how to configure and perform a basic I Q data acquisition and analyze the data using the I Q Analyzer in a remote environment Jj eese cS Activating the I Q Analyzer application RST Reset the instrument INST CRE IQ IQANALYZER Creates a new measurement channel named IQANALYZER INIT CONT OFF Switches to single sweep mode TRAC IQ SRAT 32MHZ Defines the sample rate TRAC IQ RLEN 1000 Sets the record length number of samples to capture to 1000 samples TRAC IQ BWID Queries the bandwidth of the resampling filter determined by the sample rate FORM DATA REAL 32 Formats the data as 32 byte real values TRAC IQ DATA FORM IQP Lists all I values first then all Q values in the trace results TRAC IQ AVER ON Defines averaging for the I Q trace TRAC IQ AVER COUN 10 Defines an average over 10 sweeps DISP TRAC1 MODE WRIT DISP TRAC2 MODE MAXH DISP TRAC3 MODE MINH Changes the trace modes INIT WAI Initiates a new measurement and waits until the sweep has finished Programming Examples TRAC DATA TRACE1 TRAC DATA TRACE2 TRAC DATA TRACE3 Returns the m
38. generated at the trigger output Suffix port Selects the trigger port to which the output is sent 2 trigger port 2 rear Parameters Length Pulse length in seconds Manual operation See Pulse Length on page 40 Configuring Gated Measurements Usually in spectrum analysis measurements are based on a certain length of time called the gate area With UO gating you can define the gate area using the gate length the distance between the capture periods and the number of periods The gate length and the distance between the capture periods are specified in samples O UO gating is only available using remote commands manual configuration is not possi ble Using UO gating the gate area can be defined using the following methods e Edge triggered capturing After a trigger signal the gate period is defined by a gate length and a gate dis tance All data in the gate period is captured until the required number of samples has been captured Number of gate periods gt amp 7 ke 2 16 Gate period Gate distance e Level triggered capturing After a trigger signal all data is captured in which the gate signal is set to 1 which means it has exceeded a level In this case the gate signal can be generated by the IFP trigger for example each time the IFP level is exceeded the IFP trigger signal is set to 1 and the samples in this area are captured as gate samples Configuring UO Anal
39. header and in most cases one or more parameters To use a command as a query you have to append a question mark after the last header element even if the command contains a parameter A header contains one or more keywords separated by a colon Header and parame ters are separated by a white space ASCII code 0 to 9 11 to 32 decimal e g blank If there is more than one parameter for a command these are separated by a comma from one another Only the most important characteristics that you need to know when working with SCPI commands are described here For a more complete description refer to the User Manual of the R amp S FSWP Remote command examples Note that some remote command examples mentioned in this general introduction may not be supported by this particular application 8 1 1 Conventions used in Descriptions Note the following conventions used in the remote command descriptions Command usage Introduction If not specified otherwise commands can be used both for setting and for querying parameters If a command can be used for setting or querying only or if it initiates an event the usage is stated explicitely e Parameter usage If not specified otherwise a parameter can be used to set a value and it is the result of a query Parameters required only for setting are indicated as Setting parameters Parameters required only to refine a query are indicated as Query parameters Parameters that are only
40. lt of samples 1 with lt of samples being the maximum number of captured values RST 0 Number of samples you want to query beginning at the offset you have defined If omitted all captured samples starting at offset are output Range 1 to lt of samples offset samples with lt of samples maximum number of captured values RST it of samples Measured value pair 1 Q for each sample that has been recor ded The data format depends on FORMat DATA Default unit V TRAC IQ STAT ON Enables acquisition of UO data TRAC IQ SET NORM 10MHz 32MHz EXT POS 100 4096 Measurement configuration Sample Rate 32 MHz Trigger Source External Trigger Slope Positive Pretrigger Samples 100 Number of Samples 4096 INIT WAI Starts measurement and wait for sync FORMat REAL 32 Determines output format To read the results TRAC 10 DATA MEM Reads all 4096 UO data TRAC IQ DATA MEM 0 2048 Reads 2048 UO data starting at the beginning of data acquisition TRAC IQ DATA MEM 2048 1024 Reads 1024 UO data from half of the recorded data TRAC IQ DATA MEM 100 512 Reads 512 UO data starting at the trigger point Pretrigger Samples was 100 Query only Retrieving Results 8 5 2 Retrieving UO Trace Data FORMA DATA erret tenti ha rei ned rk e E dn a il 86 FORMabcDEXPott DSEP IION erint a eee exe tec Dra 86 TRACe tis DATA iiieiicici rt atecersikes tbe
41. ments are stopped Further Sequencer commands INIT SEQ are not available RST 0 Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single Sequencer mode so each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements SYST SEQ OFF 8 5 Retrieving Results Retrieving Results The following commands can be used to retrieve the results of the UO Analyzer mea surement O 8 5 1 Storing large amounts of UO data When storing large amounts of UO data to a file consider the following tips to improve performance e f capturing and storing the I Q data is the main goal of the measurement and eval uation functions are not required use the basic HO data acquisition mode see TRACe IQ STATe on page 75 e UseaHiSlip or raw socket connection to export the data from the R amp S FSWP to a PC e Export the data in binary format rather than ASCII format see chapter A 1 For mats for Returned Values ASCII Format and Binary Format on page 133 e Use the Compatible or IQPair data mode see chapter A 2 Reference Format Description for l Q Data Files on page 133 e If only an extract of the available data is relevant use the TRACe lt n gt DATA MEMory command to store only the required section of data e Retrieving Captured VO Data ne cnni eren enn n cede el 83 e Retrieving VO Trace Data 86 e Retrieving Marker and Peak Search
42. of result display evaluation method you want to add See the table below for available parameter values When adding a new window the command returns its name by default the same as its number as a result LAY ADD 1 LEFT MTAB Result 2 Adds a new window named 2 with a marker table to the left of window 1 Query only Configuring UO Analyzer Measurements Manual operation See Magnitude on page 13 See Spectrum on page 14 See Q Vector on page 15 See Real Imag 1 Q on page 15 See Marker Table on page 16 See Marker Peak List on page 16 Table 8 2 lt WindowType gt parameter values for IQ Analyzer application Parameter value Window type FREQ Spectrum MAGN Magnitude MTABle Marker table PEAKIist Marker peak list RIMAG Real Imag UO VECT 1 Q Vector LAYout CATalog WINDow This command queries the name and index of all active windows in the active mea surement channel from top left to bottom right The result is a comma separated list of values for each window with the syntax lt WindowName_1 gt lt Windowlndex_1 gt lt WindowName_n gt lt Windowlndex_n gt Return values lt WindowName gt string Name of the window In the default state the name of the window is its index Windowlndex numeric value Index of the window Example LAY CAT Result VE zy tL Two windows are displayed named 2 at the top or left and 1 at the bottom or righ
43. on page 19 Parameters lt SampleRate gt The valid sample rates are described in chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input on page 19 RST 32 MHz Manual operation See Sample Rate on page 51 TRACe IQ TPISample This command queries the time offset between the sample start and the trigger event trigger point in sample TPIS Since the R amp S FSWP usually samples with a much higher sample rate than the specific application actually requires the trigger point determined internally is much more precise than the one determined from the down sampled data in the application Thus the TPIS indicates the offset between the sam ple start and the actual trigger event Configuring UO Analyzer Measurements TIS sample trigger start event This value can only be determined in triggered measurements using external or IFPower triggers otherwise the value is O Example TRAC IQ TPIS Result for a sample rate of 1 MHz between 0 and 1 1 MHz i e between 0 and 1 us the duration of 1 sample Usage Query only Manual operation See Trigger Offset on page 49 8 6 12 Automatic Configuration SENS JADJUSHALL e M 118 SENSe ADJust CONFigure DURation eese nennen nennen nnns 119 SENSe ADJust CONFIgure DURatlGmMODE 12u aiit terrier natu tree at erm ENNEN 119 ISENZGe Aust CONEioure Hv teresle LOMer eene 119 SENSe ADJust CONFigure HYSTeresis UPPe
44. only available for the display configuration Real Imag 1 Q see Real Imag 1 Q on page 15 Note The search settings apply to all markers not only the currently selected one Real Marker search functions are performed on the real trace of the UO measurement Imag Marker search functions are performed on the imaginary trace of the UO measurement Magnitude Marker search functions are performed on the magnitude of the and Q data Remote command CALCulate lt n gt MARKer lt m gt SEARch on page 127 How to Perform Measurements in the UO Analyzer Application 7 How to Work with UO Data 7 1 The following step by step procedures demonstrate in detail how to perform various tasks when working with UO data e How to Perform Measurements in the UO Analyzer Applicaton 61 e How to Export and Import VQ Data 62 How to Perform Measurements in the I Q Analyzer Application The following step by step instructions demonstrate how to capture l Q data on the R amp S FSWP and how to analyze data in the I Q Analyzer application How to perform a measurement in the time or frequency domain on UO data in MSRA mode only is described in the R amp S FSWP MSRA User Manual e How to Capture Baseband UO Data as RF Input 61 e How to Analyze Data in the UO Anahyzer sss 62 How to Capture Baseband I Q Data as RF Input By default the UO Analyzer assumes the l Q data is modulated on a carrier frequency and input via the
45. position of the maximum AD converter value on the level axis in where 0 96 corresponds to the lower and 100 to the upper limit of the diagram Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RPOSition on page 100 Scaling Defines the scaling method for the y axis Logarithmic Logarithmic scaling only available for logarithmic units dB and A V Watt Linear Unit Linear scaling in the unit of the measured signal Linear Per Linear scaling in percentages from 0 to 100 cent Absolute The labeling of the level lines refers to the absolute value of the refer ence level not available for Linear Percent Relative The scaling is in dB relative to the reference level only available for logarithmic units dB The upper line of the grid reference level is always at 0 dB Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SPACing on page 100 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MODE on page 99 Y Axis Max Defines the maximum value of the y axis in the currently selected diagram in either direction in Volts Thus the y axis scale starts at lt Y Axis Max gt and ends at lt Y Axis Max gt The maximum y axis value depends on the current reference level If the reference level is changed the Y Axis Max value is automatically set to the new reference level in V This command is only available if the evaluation mode for the UO Analyzer is set to I
46. reads out the averaged data Manual operation See Sweep Average Count on page 56 SENSe AVERage lt n gt STATe lt t gt State TRACe IQ AVERage STATe State This command turns averaging of the UO data on and off Before you can use the command you have to turn the I Q data acquisition on with TRACe IQ STATe If averaging is on the maximum amount of UO data that can be recorded is 512kS 524288 samples Parameters State ON OFF RST OFF Performing Measurements Example TRAC IQ ON Switches on acquisition of UO data TRAC IQ AVER ON Enables averaging of the UO measurement data TRAC IQ AVER COUN 10 Selects averaging over 10 data sets TRAC TO DATA Starts the measurement and reads out the averaged data SENSe SWEep COUNt lt SweepCount gt This command defines the number of measurements that the application uses to aver age traces In case of continuous measurement mode the application calculates the moving aver age over the average count In case of single measurement mode the application stops the measurement and cal culates the average after the average count has been reached Example SWE COUN 64 Sets the number of measurements to 64 INIT CONT OFF Switches to single measurement mode INIT WAI Starts a measurement and waits for its end Usage SCPI confirmed Manual operation See Sweep Average Count on page 56 SENSe SWEep COUNt CURRent This query ret
47. tar format can be unpacked using standard archive tools see http en wikipedia org wiki Comparison of file archivers available for most operating systems The advantage of tar files is that the archived files inside the tar file are not changed not com pressed and thus it is possible to read the UO data directly within the archive without the need to unpack untar the tar file first Contained files An ig tar file must contain the following files e Q parameter XML file e g xyz xml Contains meta information about the l Q data e g sample rate The filename can be defined freely but there must be only one single l Q parameter XML file inside an ig tar file e Q data binary file e g xyz complex f10oat32 Contains the binary l Q data of all channels There must be only one single UO data binary file inside an iq tar file Optionally an iq tar file can contain the following file Q preview XSLT file e g open IqTar xml file in web browser xslt Contains a stylesheet to display the UO parameter XML file and a preview of the UO data in a web browser A sample stylesheet is available at http www rohde schwarz com file open IqTar xml file in web browser xslt UO Parameter XML File Specification The content of the UO parameter XML file must comply with the XML schema RsIqTar xsd available at http www rohde schwarz com file RsIqTar xsd In particular the order of the XML elements must be respected i e
48. td bes Eripe ac 87 TRACe lt n gt DATA MEMON tenen akipeana inaani nanaii aranean anana 87 TRACES DATA EE 88 FORMat DATA lt Format gt This command selects the data format that is used for transmission of trace data from the R amp S FSWP to the controlling computer Note that the command has no effect for data that you send to the R amp S FSWP The R amp S FSWP automatically recognizes the data it receives regardless of the format Parameters lt Format gt ASCii ASCii format separated by commas This format is almost always suitable regardless of the actual data format However the data is not as compact as other for mats may be REAL 32 32 bit IEEE 754 floating point numbers in the definite length block format The format setting REAL is used for the binary transmission of trace data For UO data 8 bytes per sample are returned for this format set ting RST ASCII Example FORM REAL 32 Usage SCPI confirmed FORMat DEXPort DSEParator lt Separator gt This command selects the decimal separator for data exported in ASCII format Parameters lt Separator gt COMMa Uses a comma as decimal separator e g 4 05 POINt Uses a point as decimal separator e g 4 05 RST RST has no effect on the decimal separator Default is POINt Example FORM DEXP DSEP POIN Sets the decimal point as separator Retrieving Results TRACe lt n gt DATA lt ResultType gt This command queries curre
49. the R amp S FSWP The R amp S FSWP I Q Analyzer features e Acquisition of analog UO data e Import of stored UO data from other applications e Spectrum magnitude l Q vector and separate and Q component analysis of any UO data on the instrument e Export of I Q data to other applications Availability of the UO Analyzer The UO Analyzer becomes available when you equip the R amp S FSWP with the optional Spectrum Analyzer hardware R amp S FSWP B1 This user manual contains a description of the functionality that the application pro vides including remote control operation All functions not discussed in this manual are the same as in the base unit and are described in the R amp S FSWP User Manual The latest version is available for download at the product homepage http www2 rohde schwarz com product FSWP html Installation The R amp S FSWP UO Analyzer application is part of the optional Spectrum application and requires no further installation 2 1 Starting the UO Analyzer Application The UO Analyzer is an application on the R amp S FSWP To activate the UO Analyzer application 1 Select the MODE key A dialog box opens that contains all applications currently available on your R8S FSWP 2 Select the UO Analyzer item LO ER IQ Analyzer The R amp S FSWP opens a new measurement channel for the I Q Analyzer applica tion Understanding the Display Information The measurement is started immediately wi
50. the center frequency to the frequency of a marker If you use the command in combination with a delta marker that delta marker is turned into a normal marker Example CALC MARK2 FUNC CENT Sets the center frequency to the frequency of marker 2 Usage Event SENSe FREQuency CENTer lt Frequency gt This command defines the center frequency Parameters lt Frequency gt The allowed range and fmax is specified in the data sheet UP Increases the center frequency by the step defined using the SENSe FREQuency CENTer STEP command DOWN Decreases the center frequency by the step defined using the SENSe FREQuency CENTer STEP command RST fmax 2 Default unit Hz Example FREQ CENT 100 MHz FREQ CENT STEP 10 MHz FREQ CENT UP Sets the center frequency to 110 MHz Usage SCPI confirmed Manual operation See Center frequency on page 45 SENSe FREQuency CENTer STEP lt StepSize gt This command defines the center frequency step size You can increase or decrease the center frequency quickly in fixed steps using the SENS FREQ UP AND SENS FREQ DOWN commands see SENSe FREQuency CENTer on page 101 Configuring UO Analyzer Measurements Parameters lt StepSize gt fmax iS specified in the data sheet Range 1 to fMAX RST 0 1 x span Default unit Hz Example FREQ CENT 100 MHz FREQ CENT STEP 10 MHz FREQ CENT UP Sets the cen
51. to Work with UO Data eese nnn 61 7 1 How to Perform Measurements in the UO Analyzer Application 61 7 2 How to Export and Import UO Data eeeseeseeeeeeseeeeeseeeeeen nennen nnne 62 8 Remote Commands for the UO Analyzer 65 User Manual 1177 5856 02 02 3 8 1 Iotroduetion sess 65 8 2 Common Suffixes rice iieri tui estes RR Lana uviru Narad NEA riia DR aaa scenes 70 8 3 Activating UO Analyzer Measurements eeeseseeeeeeeeeeennnnnn nennen 70 8 4 Performing Measurements eeeeeseessseseeeeeeeeeeennneen nter nnn nennen nent SEENEN 75 8 5 Retrieving Results coii ecu cesecctiectessetted sa ann AENA ARANENSE 83 8 6 Configuring UO Analyzer Measurements secessit 91 8 7 Analyzing Results eciam cessi nnne ti noia nn armi i ian RR Is inna an ERR E Ra ANNAS 127 8 8 Importing and Exporting UO Data eeeeeeeeeeeseeneneenenneeennnnnnen nennen 128 8 9 Querying the Status Registers eseeesssseeeeeeeeeeeennen arre 129 8 10 Programming Examples eiie ruin nente enn incen see nausea nun ae ecu 130 A Annex EEN 133 A 1 Formats for Returned Values ASCII Format and Binary Format 133 A 2 Reference Format Descri
52. 1 1 4 R amp S FSWP with option B80 UO Bandwidth Extension sample rate 100 Hz 10 GHz maximum bandwidth 80 MHz MSRA operating mode In MSRA operating mode the MSRA Master is restricted to a sample rate of 600 MHz R amp S9 FSWP B1 Basics on UO Data Acquisition and Processing 4 2 4 2 1 4 2 2 Sample rate Maximum UO bandwidth 100 Hz to 100 MHz proportional up to maximum 80 MHz 100 MHz to 10 GHz 80 MHz MSRA master 100 MHz to 600 MHz Receiving Data Input and Providing Data Output The R amp S FSWP can analyze signals from different input sources and provide various types of output such as noise or trigger signals RF Input Protection The RF input connector of the R amp S FSWP must be protected against signal levels that exceed the ranges specified in the data sheet Therefore the R amp S FSWP is equipped with an overload protection mechanism This mechanism becomes active as soon as the power at the input mixer exceeds the specified limit It ensures that the connection between RF input and input mixer is cut off When the overload protection is activated an error message is displayed in the status bar INPUT OVLD and a message box informs you that the RF Input was discon nected Furthermore a status bit bit 3 in the STAT QUES POW status register is set In this case you must decrease the level at the RF input connector and then close the message box Then measurement is possible
53. 3 IFPower For IMM mode gating is automatically deactivated RST IMM lt TriggerSlope gt Used trigger slope POSitive NEGative RST POS lt PretriggerSamp gt Defines the trigger offset in terms of pretrigger samples Nega tive values correspond to a trigger delay This value also defines the interval between the trigger signal and the gate edge in samples Range 461373339 to 461373339 RST 0 lt NumberSamples gt Number of measurement values to record including the pretrig ger samples See chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input on page 19 RST 1001 Configuring UO Analyzer Measurements Example TRAC IQ SET NORM O0 32MHz EXT POS 0 2048 Reads 2048 l Q values starting at the trigger point sample rate 32 MHz trigger External slope Positive TRAC IQ SET NORM 0 4 MHz EXT POS 1024 512 Reads 512 I Q values from 1024 measurement points before the trigger point filter type NORMAL sample rate 4 MHz trigger External slope Positive Manual operation See Record Length on page 52 TRACe IQ SRATe lt SampleRate gt This command sets the final user sample rate for the acquired l Q data Thus the user sample rate can be modified without affecting the actual data capturing settings on the R amp S FSWP Note The smaller the user sample rate the smaller the usable UO bandwidth see chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input
54. 57 S Sample rate BIET Displayed 1 Q Analyzer 1 Q data OUER Relationship to bandwidth 0 0 0 0 eee eects 20 iere a 117 Scaling hcl 44 Y axis remote control esii ueis aniue 100 Search settings e E 60 SEQUENCES 5 10 Aborting remote 18 Activating remote csser tici tentem inan 78 Mode remote titi cnet reete decis 79 ni cc E 7T Signal processing DIAGRAM ata RT 19 Signal source REMOTE ecd en Diete Prae eet onn dieses eae 93 Single sweep fecic 56 Slope NIG GT 50 105 Softkeys Se ELE Auto Level S sg A need asamiecss Continue Single SWEEP atn rica eie 57 Continuous SWEEP ccooocccccocccononcccnnonncnnanncnnanaccnnanaccnnanes 56 Display Config SSES 57 Export tes m 36 External AT Free RUM none 47 Frequency CONTIG EE 44 ege IF Power IMPON E PER leet GE IQ Import wo Lower Level Hysteresis D Meastime Auto i 59 Meastime Manual n 59 Noise cancellation 43 Power Sensor 48 La e 42 Retriever els ee do oats 41 Ref Level Offset ven 41 RF Atten Auto mn 42 RF Atten Manual 42 RF Power 48 Single Sweep Sweep count Dee kare Trigger Config Trigger Offset Upper Level Hysteresis acc ne eerte 59 Specifics for Config katiOti EE 35 Spectrum e
55. 7 See Free Run on page 47 See Ext Trigger 1 2 on page 47 See IF Power on page 47 See 1 Q Power on page 48 See RF Power on page 48 See Power Sensor on page 48 See Time on page 49 TRIGger SEQuence TIME RINTerval Interval This command defines the repetition interval for the time trigger Parameters Interval 2 0 ms to 5000 Range 2ms to 5000 s RST 1 0s Example TRIG SOUR TIME Selects the time trigger input for triggering TRIG TIME RINT 50 The measurement starts every 50 s Manual operation See Repetition Interval on page 49 8 6 9 Configuring Trigger Output OUTPUETRICOS pon DIREC olere A A teu ada terrena 107 OUTPUETRIGOS pom DEE 108 QUTPut TRIGGErport gt OTY PG orita aiaia a aiiai iaaiiai airaa 108 OLUTPut TRIGgersport PULSe MMidialte cactus exten aada 108 OUTPut TRIGger port PUL Se ENGLIbh 22 1 2 2 22 222 tcr atero tacto L at beer 109 OUTPut TRIGger lt port gt DIRection Direction This command selects the trigger direction for trigger ports that serve as an input as well as an output Suffix lt port gt Selects the used trigger port lt 2 gt selects trigger port 2 on the rear panel Parameters lt Direction gt INPut Port works as an input OUTPut Port works as an output RST INPut Manual operation See Trigger 1 2 on page 39 Configuring UO Analyzer Measurements OUTPut TRIGger lt port gt LEVe
56. Analyzer Measurements Channel type of the new channel For a list of available channel types see INSTrument LIST on page 73 String containing the name of the channel The channel name is displayed as the tab label for the measurement channel Note If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel see INSTrument LIST on page 73 INST CRE PNO PhaseNoise 2 Adds an additional phase noise display named PhaseNoise 2 INSTrument CREate REPLace lt ChannelName1 gt lt ChannelType gt lt ChannelName2 gt This command replaces a measurement channel with another one Setting parameters lt ChannelName1 gt lt ChannelType gt lt ChannelName2 gt Example Usage String containing the name of the measurement channel you want to replace Channel type of the new channel For a list of available channel types see INSTrument LIST on page 73 String containing the name of the new channel Note If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel see INSTrument LIST on page 73 INST CRE REPL PhaseNoise PNO PNO2 Replaces the channel named PhaseNoise by a new measure ment channel of type Phase Noise named PNO2 Setting only INSTrument DELete lt ChannelName gt This command deletes a measurement channel If
57. Analyzer Measurements DISPlay WINDow lt n gt SIZE Size This command maximizes the size of the selected result display window temporarily To change the size of several windows on the screen permanently use the LAY SPL command see LAYout SPLitter on page 124 Parameters lt Size gt Example LARGe Maximizes the selected window to full screen Other windows are still active in the background SMALI Reduces the size of the selected window to its original size If more than one measurement window was displayed originally these are visible again RST SMALI DISP WIND2 LARG LAYout ADD WINDow lt WindowName gt lt Direction gt lt WindowT ype gt This command adds a window to the display in the active measurement channel This command is always used as a query so that you immediately obtain the name of the new window as a result To replace an existing window use the TAYout REPLace WINDow command Parameters lt WindowName gt lt Direction gt lt WindowType gt Return values lt NewWindowName gt Example Usage String containing the name of the existing window the new win dow is inserted next to By default the name of a window is the same as its index To determine the name and index of all active windows use the LAYout CATalog WINDow query LEFT RIGHt ABOVe BELow Direction the new window is added relative to the existing win dow text value Type
58. C Ute ii tnim et tereti t iae Ee e Er ERR RO enhn 74 SS Mem SEQUENCO eege eege 82 TRACe l0 AVERage COUN EE 80 TRACE IQ AVERage ap quj a eraa EA SENES TOSET E aSa iiSi NEEVA 80 TRACIO BWID EE 115 TRACS IQ DATA FORMA ctt ctt A Ub prec e dede tk dd 84 TRACe IQ DATA MEMory 84 TRACSIOQ DATA S 83 TRAGO IQ CN 110 TRAGE IQ EGA TEGA EE 110 TRACSIQ EGATE LENGU orae a EE E EET NEEE ENET 110 TRAGeTAQ EGATe NOFgateperiodS crt t rere iR re rd e n Ene en Rep ERR 111 Ee e ER dE 111 TRACe IQ EVAL m TRAG e Te ET 115 dE e EE 115 ao e i 117 TRAGeQ tel 117 TRAGI STATE EE 75 TRAGesn 2 DAVADMEMOTLVS E 87 NR NEE RER 88 TRACESASEDA TA iaa 87 TRIGE SEQUENCE ED MEI 103 TRIGger SEQuerce AHOLDOH TIME tt ttr a EA eene nen 103 TRIGger SEQuence IFPower HOLDofF 3 2 trt nr rere rrt err tret c i rre e tna eh 103 TRIGger SEQuerice IFPower HYS Teresi Sonen aE epi aere cree pne E A exe anar 104 TRIGger SEQuernce LEVel IFPOWSLE iete tir trente ren etr re tren n rre enne xe 105 TRIGger SEQuence LEVel IQPOWer encierra er mre tetto irr ren RR idas 105 TRIGger SEQuence LEVE REPOWSFE cocaina roda orina rip 105 TRIGger SEQuence LEVel EXTernalsport rto nett trn rr recen 104 TRIGger SEQuence SLEOPBe rrr hen em rh ine ea E TESEN REVE FEAET ATENEA TRIGger SEQuence SOURce
59. EVel on page 121 command the internal attenuators and the preamplifier are also adjusted In order to avoid frequent adaptation due to small changes in the input signal you can define a hysteresis This setting defines an upper threshold the signal must exceed compared to the last measurement before the reference level is adapted automatically Parameters Threshold Range 0 dB to 200 dB RST 1dB Default unit dB Example SENS ADJ CONF HYST UPP 2 Example For an input signal level of currently 20 dBm the reference level will only be adjusted when the signal level rises above 22 dBm Manual operation See Upper Level Hysteresis on page 59 SENSe ADJust CONFigure TRIG State Defines the behaviour of the measurement when adjusting a setting automatically using SENS ADJ LEV ON for example See Adjusting settings automatically during triggered measurements on page 58 Parameters lt State gt ON 1 The measurement for automatic adjustment waits for the trigger OFF 0 The measurement for automatic adjustment is performed imme diately without waiting for a trigger RST 1 SENSe ADJust FREQuency This command sets the center frequency to the frequency with the highest signal level in the current frequency range Configuring UO Analyzer Measurements Example ADJ FREQ Usage Event Manual operation See Adjusting the Center Frequency Automatically Auto Freq on page 58 SENSe
60. I Q data that was captured by or imported to the R amp S FSWP can then be evaluated in various different result displays Select the result displays using the SmartGrid functions Up to 6 evaluations can be displayed in the UO Analyzer at any time including several graphical diagrams marker tables or peak lists For details on working with the SmartGrid see the R amp S FSWP Getting Started manual Measurements in the time and frequency domain The I Q Analyzer application not Master in MSRA mode can also perform measure ments on the captured UO data in the time and frequency domain see also chap ter 4 5 1 Q Analyzer in MSRA Operating Mode on page 31 They are configured using the same settings and provide similar results In addition the analysis interval used for the measurement is indicated as in all multistandard applications The time and frequency domain measurements and the available results are described in detail in the R amp S FSWP User Manual Result displays for UO data MAGIA 13 EE E 14 Heap 15 Dico T 15 M rker KE 16 Marker Peak List E 16 Magnitude Shows the level values in time domain R amp S9FSWP B1 Measurement and Result Displays MultiView Analog Demod IQ Analyzer O AQT 3 s SRate 32 0 MHz z RecLength STAP Clm lagnitude 1001 pts Remote command LAY ADD WIND 1 RIGH MAGN See LAYout ADD WINDow on page 122 Re
61. LGorithm SENSE enee m I SENS amp T IG EF T WINDOW BbENGI iiss icone ty ertt E toto ea P ERE ue a PARERE E RS Ree TORY ENEE 113 SENSe IQ FFT WINDOW OVERIap cic t canet cg enne a EEs 114 SENS amp IQ EFT2WINDOW TYPE niic tnit eae teer it 114 SENSe POWer Lee e DE 97 EI rz A ate m SENSe SWEep COUNt SENSe Ee eieiei ug 81 SENSe SWEep POINIS E 81 SENSE SWE TIME err rh e cer A Eed sas ra e Ec ER EERSTEN HERR T 82 J X jo M 76 CALCulatesn DEETamarkersmes X cos icr en tp Os 89 CAL GCulatesn DEETamarkerstr 3Y GE 89 CALCulate n IQ MODE CAL Culate nz MAbkercmz FUNC tion CENTET AAA 101 CAL Culate nzMAbkercmzFEUNGCiontptake GOIN 88 CAL Culate nzMAbkercmzFUNGCiontbteake NH 88 CAL Culate lt n gt MARKer lt m gt FUNCtion FPEeaks Vd 89 CAL Culate nzMAbkercmzEUNGCionhRtterence AA 96 GALCulatesn MARKer m SEARCH iicet cc co e t CERE e eue aa en Ee do eu ce rate Date 127 CAL Culate lt h gt MARKer lt M gt e 90 CALCulatesn gt iMARKGISMP Y EE 90 CAL G latesn gt UNIT POWO TE 96 DIAGNoOstic SERVICO N elle 94 DISPlay FORMat DISPlay WINDow lt n gt SIZE RUE VEIREL Re WEE 100 DISPlay WINDowsn TRAGCe st Y SCALe eit trier ret reete rente 99 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO ONCE essen emen 99 DISPlayWIND
62. NCE 99 DISPlay WINDow n TRACe t Y SCALe MODE eese nennen 99 DISPlay WINDow n TRACe t Y SCALe RPOSition esee 100 DISPlayEWINDow lt n TRACeE t Y SPACING DEE 100 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe Range This command defines the display range of the y axis for all traces t is irrelevant Parameters Range Range 1dB to 200 dB RST 100 dB Example DISP TRAC Y 110dB Usage SCPI confirmed Manual operation See Range on page 43 See Y Axis Max on page 44 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO ONCE Automatic scaling of the y axis is performed once then switched off again for all traces t is irrelevant Usage SCPI confirmed DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MODE Mode This command selects the type of scaling of the y axis for all traces t is irrelevant When the display update during remote control is off this command has no immediate effect Parameters Mode ABSolute absolute scaling of the y axis RELative relative scaling of the y axis RST ABSolute Example DISP TRAC Y MODE REL Configuring UO Analyzer Measurements Manual operation See Scaling on page 44 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RPOSition Position This command defines the vertical position of the reference level on the display grid for all traces t is irrelevan
63. O Data from RF Input Complex baseband data In the telephone systems of the past baseband data was transmitted unchanged as an analog signal In modern phone systems and in radio communication however the baseband data is modulated on a carrier frequency which is then transmitted and must be demodulated by the receiver When using modern modulation methods e g QPSK QAM etc the baseband signal becomes complex Complex data or Q data con sists of an imaginary I and a real Q component UO Analyzer processing complex data from RF input The I Q Analyzer is a standard application used to capture and analyze UO data on the R amp S FSWP By default it assumes the I Q data is modulated on a carrier frequency and input via the RF INPUT connector on the R amp S FSWP The A D converter samples the IF signal at a rate of 200 MHz The digital signal is down converted to the complex baseband lowpass filtered and the sample rate is reduced An equalizer filter before the resampler compensates for the frequency response of the analyzer s analog filter stages which would otherwise add to the modu lation errors The continuously adjustable sample rates are realized using an optimal decimation filter and subsequent resampling on the set sample rate A special memory capture buffer is available in the R amp S FSWP for a maximum of 400 Ms 400 1024 1024 of complex samples pairs of and Q data The number of analog IF filter
64. Preselector Activates or deactivates the YIG preselector if available on the R amp S FSWP An internal YIG preselector at the input of the R amp S FSWP ensures that image frequen cies are rejected However this is only possible for a restricted bandwidth In order to use the maximum bandwidth for signal analysis you can deactivate the YIG preselector at the input of the R amp S FSWP which may lead to image frequency display Note that the YIG preselector is active only on frequencies greater than 8 GHz There fore switching the YIG preselector on or off has no effect if the frequency is below that value Note For the following measurements the YIG Preselector is off by default if available e VSA Remote command INPut FILTer YIG STATe on page 93 5 3 2 Outputs The output supported by the UO Analyzer are similar to those in the Phase Noise and Spectrum applications To configure output Output can be configured via the Output dialog box To display the Output dialog box do one of the following 1 Select Output from the Overview dialog box 2 Press the INPUT OUTPUT key and then the Output Config softkey For a comprehensive description on how to configure the DC Power sources and the Signal Source please refer to the documentation of the R amp S FSWP leese SOURCE EE 39 QQ EE 39 L Output TYE NER 39 Configuring Data Inputs and Outputs ato A 40 L Pulse Leng Misrin r i A E 40 e e e RR RERO 40 Noise S
65. Q Vector or Real Imag Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe on page 99 Configuring Frequency Characteristics Frequency settings for the input signal can be configured via the Frequency dialog box which is displayed when you do one of the following e Select the FREQ key and then the Frequency Config softkey Configuring Frequency Characteristics e Select Frequency from the Overview The remote commands required to configure the frequency are described in chap ter 8 6 7 Configuring the Frequency on page 101 Center TEE 45 Center Frequency Gtepelze An 45 Prequenty Onset ED 45 Center frequency Defines the normal center frequency of the signal The allowed range of values for the center frequency depends on the frequency span span gt 0 Spanmin 2 lt feenter S fmax SPANmin 2 fmax and span i depend on the instrument and are specified in the data sheet Remote command SENSe FREQuency CENTer on page 101 Center Frequency Stepsize Defines the step size by which the center frequency is increased or decreased using the arrow keys When you use the rotary knob the center frequency changes in steps of only 1 10 of the Center Frequency Stepsize The step size can be coupled to another value or it can be manually set to a fixed value Center Sets the step size to the value of the center frequency The used value is indicated in the Value field Manual
66. Q Analyzer Note To turn trace display back on or to enable the evaluation functions of the UO Analyzer execute the TRAC IQ EVAL ON command see TRACe IO EVAL on page 74 Parameters State ON OFF RST OFF Example TRAC IQ ON Switches on UO data acquisition 8 4 Performing Measurements Different measurement procedures D Two different procedures to capture UO data remotely are available e Measurement and result query with one command see TRACe 10 DATA on page 83 This method causes the least delay between measurement and output of the result data but it requires the control computer to wait actively for the response data e Setting up the instrument starting the measurement via INIT and querying the result list at the end of the measurement see TRACe 10 DATA MEMory on page 84 With this method the control computer can be used for other activities during the measurement However the additional time needed for synchronization via service request must be taken into account 0l eer 76 INI Tiale sn ee o no retra ese en Pes rt Pe ete eic HT TT INITiate e el te TEE TT INI Trate EE OT 78 INITiatesn gt SEQUENCEMmAB EE 78 Performing Measurements INI Tate n SEOQuencerIMMdiale deret retain nc t centered eo Itt eee 78 INIMate lt n SEQuUeEntea MODE ot A 79 INlTlate nz SEOuencerRtrbResbt ALL 79 BENSE AVERAGE COUNT citis ere deterret a niece ue 80 TRAGCe OQ AVERage COUN EE 80 SENSe AVERage
67. R amp SSFSWP B1 IO Analyzer User Manual Ymax 9 988 mV 1177 5856 02 02 ROHDE amp SCHWARZ Test amp Measurement User Manual This manual describes the following R amp S9FSWP models with firmware version 1 10 or higher R amp S FSWP8 1322 8003K08 R amp S FSWP26 1322 8003K26 The 1 Q Analyzer is integral part of the following options e R amp S FSWP B1 1322 9997 08 e R amp S FSWP B1 1322 9997 26 The software contained in this product makes use of several valuable open source software packages For information see the Open Source Acknowledgment on the user documentation CD ROM included in delivery Rohde amp Schwarz would like to thank the open source community for their valuable contribution to embedded computing 2015 Rohde amp Schwarz GmbH amp Co KG M hldorfstr 15 81671 M nchen Germany Phone 49 89 41 29 0 Fax 49 89 41 29 12 164 Email info rohde schwarz com Internet www rohde schwarz com Subject to change Data without tolerance limits is not binding R amp S is a registered trademark of Rohde amp Schwarz GmbH amp Co KG Trade names are trademarks of the owners The following abbreviations are used throughout this manual R amp S FSWP is abbreviated as R amp S FSWP R amp S MultiView is abbrevi ated as MultiView Products of the R amp S9SMW family e g R amp S SMW200A are abbreviated as R amp S SMW Customer Support Technical support where and whe
68. RCNH UU wa User Manual 1177 5856 02 02 16 R amp S FSWP B1 Measurement and Result Displays 2 Marker Peak List No l Tip To navigate within long marker peak lists simply scroll through the entries with your finger on the touchscreen Remote command LAY ADD 1 RIGH PEAK see LAYout ADD WINDow on page 122 Results CALCulate lt n gt MARKer lt m gt X on page 90 CALCulate lt n gt MARKer lt m gt Y on page 90 User Manual 1177 5856 02 02 17 Processing Analog UO Data from RF Input 4 Basics on Q Data Acquisition and Pro 4 1 cessing Some background knowledge on basic terms and principles used when describing UO data acquisition on the R amp S FSWP in general and in the UO Analyzer application in particular is provided here for a better understanding of the required configuration set tings The UO Analyzer provides various possibilities to acquire the UO data to be analyzed e Capturing analog UO data from the RF INPUT connector e Importing UO data from a file Background information for all these scenarios and more is provided in the following sections e Processing Analog UO Data from RF Input 18 e Receiving Data Input and Providing Data Output 22 e VO Data Import and EXDOIU etr edet rt extet ei eed eene e eee 24 Basics Off FR 25 e Q Analyzer in MSRA Operating Mode cccccccceeeeccreeeeeseccneeeeeececneeeeeeneneneneens 31 Processing Analog U
69. Sample Rate oo min 4096 Re cord Length To simplify operation some parameters are coupled and automatically calculated such as record length and RBW RBW mode Depending on the selected RBW mode the resolution bandwidth is either determined automatically or can be defined manually Auto mode This is the default mode in the I Q Analyzer The RBW is determined automatically depending on the Sample Rate and Window Length where the window length corre sponds to the Record Length or a maximum of 4096 If the record length is larger than the window length multiple windows are combined the FFT length is 4096 A Flatop window function is used Manual mode The RBW can be defined by the user The Window Length is adapted to comply with equation 4 1 Since only window lengths with integer values can be employed the Sample Rate is adapted if necessary to obtain an integer window length value If the record length is larger than the window length multiple windows are combined the FFT length is 4096 A Flatop window function is used Advanced FFT mode The RBW is determined by the advanced FFT parameters depending on the selected FFT Calculation Methods method FFT Calculation Methods FFT calculation can be performed using different methods Single In single mode one FFT is calculated for the entire record length that means the win dow length is identical to the record length UO Analyzer in MSRA Operating Mode
70. WP B1 Measurement and Result Displays MultiView Spectrum Spectrum 2 IQ Analyzer Ref Leve M AQT SRate 32 0 MHz Freq 30 0 MHz RecLength FP Real Imag 1 Q e 1AP Clrw 1 Imag Real Imag 1 0 CF 30 0 MHz 1001 pts Remote command LAY ADD WIND 1 RIGH RIM see LAYout ADD WINDow on page 122 Results TRACe lt n gt DATA on page 87 Marker Table Displays a table with the current marker values for the active markers This table may be displayed automatically if configured accordingly Type Shows the marker type and number M for a nor mal marker D for a delta marker Ref Shows the reference marker a delta marker refers to Trace Shows the trace the marker is positioned on X Y Value Shows the marker coordinates usually frequency and level Tip To navigate within long marker tables simply scroll through the entries with your finger on the touchscreen Remote command LAY ADD 1 RIGH MTAB see LAYout ADD WINDow on page 122 Results CALCulate lt n gt MARKer lt m gt X on page 90 CALCulate lt n gt MARKer lt m gt Y on page 90 Marker Peak List The marker peak list determines the frequencies and levels of peaks in the spectrum or time domain How many peaks are displayed can be defined as well as the sort order In addition the detected peaks can be indicated in the diagram The peak list can also be exported to a file for analysis in an external application mum PE INR
71. active measurement channel use the LAYout CATalog WINDow query lt WindowType gt Type of result display you want to use in the existing window See LAYout ADD WINDow on page 122 for a list of availa ble window types Example LAY REPL WIND 1 MTAB Replaces the result display in window 1 with a marker table LAYout SPLitter lt Index1 gt lt Index2 gt lt Position gt This command changes the position of a splitter and thus controls the size of the win dows on each side of the splitter R amp S FSWP B1 Remote Commands for the UO Analyzer Compared to the DISPlay WINDow lt n gt SIZE on page 122 command the LAYout SPLitter changes the size of all windows to either side of the splitter per manently it does not just maximize a single window temporarily Note that windows must have a certain minimum size If the position you define con flicts with the minimum size of any of the affected windows the command will not work but does not return an error y 100 x 100 y 100 1 01 GHz 102 12 dim x 0 y 0 x 100 Fig 8 1 SmartGrid coordinates for remote control of the splitters Parameters lt Index1 gt The index of one window the splitter controls lt Index2 gt The index of a window on the other side of the splitter lt Position gt New vertical or horizontal position of the splitter as a fraction of the screen area without channel and status bar and softkey menu The point of origin
72. again Reactivating the RF input is also possible via the remote command INPut ATTenuation PROTection RESet Basics on Input from UO Data Files The I Q data to be evaluated in a particular R amp S FSWP application can not only be captured by the application itself it can also be loaded from a file provided it has the correct format The file is then used as the input source for the application For example you can capture UO data using the I Q Analyzer application store it to a file and then analyze the signal parameters for that data later using the UO Analyzer The I Q data must be stored in a format with the file extension iq tar For a detailed description see chapter A 3 UO Data File Format iq tar on page 135 As opposed to importing data from an UO data file using the import functions provided by some R amp S FSWP applications e g the I Q Analyzer or the R amp S FSWP VSA appli cation the data is not only stored temporarily in the capture buffer where it overwrites the current measurement data and is in turn overwritten by a new measurement Instead the stored UO data remains available as input for any number of subsequent measurements Furthermore the temporary data import requires the current mea surement settings in the current application to match the settings that were applied when the measurement results were stored possibly in a different application When User Manual 1177 5856 02 02 22 R amp S9
73. age 36 MMEMory STORe lt n gt I1Q STATe 1 lt FileName gt This command writes the captured UO data to a file The suffix lt n gt is irrelevant The file extension is iq tar By default the contents of the file are in 32 bit floating point format Secure User Mode In secure user mode settings that are to be stored on the instrument are stored to vol atile memory which is restricted to 256 MB Thus a Memory full error may occur although the hard disk indicates that storage space is still available To store data permanently select an external storage location such as a USB memory device For details see Protecting Data Using the Secure User Mode in the Data Manage ment section of the R amp S FSWP User Manual Parameters 1 lt FileName gt String containing the path and name of the target file Example MMEM STOR IQ STAT 1 C R_S Instr user data ig tar Stores the captured UO data to the specified file Manual operation See UO Export on page 36 Querying the Status Registers The R amp S FSWP I Q Analyzer uses the standard status registers of the R amp S FSWP For details on the common R amp S FSWP status registers refer to the description of remote control basics in the R amp S FSWP User Manual o RST does not influence the status registers 8 10 8 10 1 Programming Examples Programming Examples The following programming examples demonstrate how to capture UO data and per form UO
74. agnitude for each sweep point LAY REPL WIND 1 RIMAG Changes the result display to Real Imag 1 0 CALC MARK SEAR MAGN Configures searches to search both I and Q branches CALC MARK Y Queries the result of the peak search on both branches TRAC IQ DATA MEM 0 500 Returns the first 500 samples of the stored I Q data for the measurement For each sample first the I value then the Q value is listed TRAC IQ DATA MEM 500 500 Returns the second half of the 1000 captured sample values 8 10 2 Basic HO Analysis with Improved Performance This example demonstrates how to configure and perform a basic I Q data acquisition and analyze the data using the UO Analyzer in a remote environment a Activating the I Q Analyzer application RST Reset the instrument INIT CONT OFF Switches to single sweep mode TRACE IQ ON Switches the operating mode of the current measurement channel to I Q Analyzer while retaining the relevant parameters from the Spectrum mode TRACE IQ SET NORM 0 32000000 IOP POS 0 1000 Configures the sample rate as 32 MHz IQP trigger positive trigger slope no pretrigger samples 1000 samples to capture FORM REAL 32 The data is formatted as real values TRAC IQ EGAT ON Turns on gated measurement TRAC IQ EGAT TYPE LEV Select the level gate type Programming Examples 3 J RAC IQ EGAT LENG 20 Sets the gate length to 20 samples RAC IQ
75. ample TRIG LEV RFP 30dBm Manual operation See Trigger Level on page 49 TRIGger SEQuence SLOPe lt Type gt This command selects the trigger slope Configuring UO Analyzer Measurements Parameters Type POSitive NEGative POSitive Triggers when the signal rises to the trigger level rising edge NEGative Triggers when the signal drops to the trigger level falling edge RST POSitive Example TRIG SLOP NEG Manual operation See Slope on page 50 TRIGger SEQuence SOURce Source This command selects the trigger source Note on external triggers If a measurement is configured to wait for an external trigger signal in a remote control program remote control is blocked until the trigger is received and the program can continue Make sure this situation is avoided in your remote control programs Parameters lt Source gt IMMediate Free Run EXT EXT2 Trigger signal from one of the TRIGGER INPUT OUTPUT con nectors Note Connector must be configured for Input RFPower First intermediate frequency IFPower Second intermediate frequency IQPower Magnitude of sampled UO data For applications that process l Q data such as the I Q Analyzer or optional applications PSEN External power sensor RST IMMediate Example TRIG SOUR EXT Selects the external trigger input as source of the trigger signal Configuring UO Analyzer Measurements Manual operation See Trigger Source on page 4
76. analyzer IF signal 4 1 1 Processing Analog UO Data from RF Input complex samples to be captured can be defined for restrictions refer to chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input on page 19 The block diagram in figure 4 1 shows the analyzer hardware from the IF section to the processor Data aquisition hardware digital down conversion continuous decimation A D fractional converter resampling DA 4 C p Application sample rate Downsampling filters 200 MHz sampling clock RF IF Power or External Trigger arbitrary sample rate 100Hz 10 GHz Fig 4 1 Block diagram illustrating the R amp S FSWP signal processing for analog HO data without bandwidth extension options Sample Rate and Maximum Usable UO Bandwidth for RF Input Definitions Input sample rate ISR the sample rate of the useful data provided by the device connected to the input of the R amp S FSWP User Output Sample rate SR the sample rate that is defined by the user e g in the Data Aquisition dialog box in the UO Analyzer application and which is used as the basis for analysis or output e Usable UO Analysis bandwidth the bandwidth range in which the signal remains undistorted in regard to amplitude characteristic and group delay this range can be used for accurate analysis by the R amp S FSWP e Record length Number of UO samples to capture during the specified measure me
77. ap on page 114 Window Length Advanced FFT mode Basic settings Defines the number of samples to be included in a single FFT window in averaging mode In single mode the window length corresponds to the Record Length on page 52 Values from 3 to 4096 are available in Manual mode in Advanced FFT mode val ues from 3 to 524288 are available 5 7 2 Data Acquisition and Bandwidth Settings However the window length may not be longer than the FFT Length Remote command SENSe IQ FFT WINDow LENGth on page 113 Sweep Settings The sweep settings are configured via the SWEEP key or in the Sweep tab of the Bandwidth dialog box D Laast 14 Data Acquisition Sweep Sweep Count gt To display this dialog box do one of the following e Select the Bandwidth button in the configuration Overview and switch to the Sweep tab e Select the SWEEP key and then the Sweep Config softkey iris M 55 Sweep Average e TT erre eer han da 56 Continuous Sweep RUN CONT ssssssssssssseeeeeenen nnne tent tnnt nn trnn nnns entren 56 single Sweep REN SINGLE teta a ttr te irt oa treat tao cete taeda 56 Continue Single SWeGD E 57 Sweep Points In the UO Analyzer application a specific frequency bandwidth is swept for a specified measurement time During this time a defined number of samples Record Length are captured These samples a
78. ated frequency points defined by the FFT length to the defined number of measurement points By default the Auto peak trace detector is used User Manual 1177 5856 02 02 27 Basics on FFT Due to the fact that the frequency points are reduced to the number of measurement points using a detector other than Auto Peak and fewer than 4096 measurement points may lead to wrong level results 4096 samples n use trace detector to combine these FFTs use trace detector to reduce to sweep points 4 4 3 Dependencies Between FFT Parameters FFT analysis in the R amp S FSWP is highly configurable Several parameters including the resolution bandwidth record length and FFT length can be defined according to the user s requirements Note however that several parameters are correlated and not all can be configured independently of the others Record Length Defines the number of UO samples to capture By default the number of measurement points is used The record length is calculated as the measurement time multiplied by the sample rate If you change the record length the Meas Time is automatically changed as well For FFTs performed using only a single window Single mode the record length which is then identical to the FFT length may not exceed 512k FFT Length Defines the number of frequency points determined by each FFT calculation The more points are used the higher the resolution in the spectrum becomes
79. ated with the Sample Rate and Record Length and possi bly the Window Function and Window Length Changing any one of these parameters may cause a change to one or more of the other parameters For more information see chapter 4 4 Basics on FFT on page 25 Auto mode Default The RBW is determined automatically depending on the Sample Rate and Record Length Manual mode The RBW can be defined by the user The user defined RBW is used and the Window Length and possibly Sample Rate are adapted accordingly Advanced This mode is used if the Advanced Fourier Transformation Params FFT mode option is enabled The RBW is determined by the advanced FFT parameters Remote command SENSe IQ BANDwidth BWIDth MODE on page 112 SENSe IQ BANDwidth BWIDth RESolution on page 112 Advanced FFT mode Basic settings Shows or hides the Advanced Fourier Transformation parameters in the Data Acqui sition dialog box These parameters are only available and required for the advanced FFT mode Note that if the advanced FFT mode is used the RBW settings are not available For more information see chapter 4 4 4 Frequency Resolution of FFT Results RBW on page 29 Transformation Algorithm Advanced FFT mode Basic settings Defines the FFT calculation method Data Acquisition and Bandwidth Settings Single One FFT is calculated for the entire record length if the FFT Length is larger than the record length zer
80. automatically during triggered measurements The measurement for adjustment is performed without waiting for a trigger The trigger source is temporarily set to Free Run After the measurement is com pleted the original trigger source is restored The trigger level is adjusted as fol lows For IF Power and RF Power triggers Trigger Level Reference Level 15 dB For Video trigger Trigger Level 85 96 Remote command SENSe ADJust CONFigure TRIG on page 120 Adjusting all Determinable Settings Automatically Auto A 58 Adjusting the Center Frequency Automatically Auto Freq ssesssssss 58 Setting the Reference Level Automatically Auto Level 59 Resetting the Automatic Measurement Time Meastime Auto 59 Changing the Automatic Measurement Time Meastime Manual 59 Upper Level FlysIGfesi cer tetro etd eet e te ce e ete re dee eei tec etta 59 Lower Level FySieresis error to e hee dem e xp RG 59 Adjusting all Determinable Settings Automatically Auto AII Activates all automatic adjustment functions for the current measurement settings This includes Auto Frequency e Auto Level Note MSRA operating modes In MSRA operating mode this function is only available for the MSRA Master not the applications Remote command SENSe ADJust ALL on page 118 Adjusting the Center Frequency Automatically Auto Freq The R amp S FSWP adjusts the center freq
81. can be retrieved in smaller portions making the command faster than the TRAC DATA command This is useful if only specific parts of the trace data are of interest If no parameters are specified with the command the entire trace data is retrieved in this case the command is identical to TRAC DATA TRACE1 Query parameters lt Trace gt TRACE1 TRACE2 TRACE3 TRACE4 TRACE5 TRACE6 lt OffsSwPoint gt The offset in sweep points related to the start of the measure ment at which data retrieval is to start lt NoOfSwPoints gt Number of sweep points to be retrieved from the trace 8 5 3 Retrieving Results Example TRAC DATA MEM TRACE1 25 100 Retrieves 100 sweep points from trace 1 starting at sweep point 25 Usage Query only TRACe lt n gt DATA X lt TraceNumber gt This command queries the horizontal trace data for each sweep point in the specified window for example the frequency in frequency domain or the time in time domain measurements This is especially useful for traces with non equidistant x values Query parameters lt TraceNumber gt Trace number TRACE1 TRACE6 Example TRAC3 X TRACE1 Returns the x values for trace 1 in window 3 Usage Query only Retrieving Marker and Peak Search Results CALCulate lt n gt MARKer lt m gt FUNCtion FPEaks SORT ccccccccesceessseeceeceeeeseeesseseeeaeeees 88 CALCulate lt n gt MARKer lt m gt FUNCtion FPE akS X cccc
82. ccccesssccescecceesecesseeeceeneceseeseeeanes 88 CAL Culate nz M bkermz FUNCHontbteakey enean nnns 89 GAL Gulatesmns DEL Tamak eMe SX eerie dices ree cre aaa 89 GALCulate n DELTamarketr mo Y accessu en tesen dan sk sua Re ru a aaa ned Na DM ainda ada 89 GAL Culle lt n gt MARKS M K i n nat caracol naaa dare p2RDe Y cca pa MA TOR eR san dabas 90 CALCUlate E en EE 90 Mrz ferae deal cy eem 91 CALCulate lt n gt MARKer lt m gt FUNCtion FPEaks SORT lt SortMode gt This command selects the order in which the results of a peak search are returned Parameters lt SortMode gt X Sorts the peaks according to increasing position on the x axis Y Sorts the peaks according to decreasing position on the y axis RST X Example CALC MARK FUNC FPE SORT Y Sets the sort mode to decreasing y values CALCulate lt n gt MARKer lt m gt FUNCtion FPEeaks X This command queries the position of the peaks on the x axis Retrieving Results The order depends on the sort order that has been set with CALCulate lt n gt MARKer m FUNCtion FPEaks SORT lt n gt m are irrelevant Return values lt PeakPosition gt Position of the peaks on the x axis The unit depends on the measurement Usage Query only CALCulate lt n gt MARKer lt m gt FUNCtion FPEeaks Y This command queries the position of the peaks on the y axis The order depends on the sort order that has been set with CALCulate
83. d turns noise cancellation on and off If noise cancellation is on the R amp S FSWP performs a reference measurement to determine its inherent noise and subtracts the result from the channel power measure ment result first active trace only For more information see Noise cancellation on page 43 Parameters State ON OFF RST OFF Example POW NCOR ON Manual operation See Noise cancellation on page 43 8 6 4 Configuring the Attenuator INPUCATI RENO EEN 97 INPuEATTenustlonj NU TO dix Coe ea uoo rn uana de da n Da uu c ta do bd ee enc nena 98 INPut ATTenuation lt Attenuation gt This command defines the total attenuation for RF input If you set the attenuation manually it is no longer coupled to the reference level but the reference level is coupled to the attenuation Thus if the current reference level is not compatible with an attenuation that has been set manually the command also adjusts the reference level Parameters lt Attenuation gt Range see data sheet Increment 5 dB RST 10 dB AUTO is set to ON Example INP ATT 30dB Defines a 30 dB attenuation and decouples the attenuation from the reference level Usage SCPI confirmed Manual operation See Attenuation Mode Value on page 42 8 6 5 Configuring UO Analyzer Measurements INPut ATTenuation AUTO State This command couples or decouples the attenuation to the reference level Thus when the reference level is changed the
84. e 105 TRIGger SEQuence LEVel EXTernal port on page 104 TRIGger SEQuence LEVel RFPower on page 105 Repetition Interval Defines the repetition interval for a time trigger The shortest interval is 2 ms The repetition interval should be set to the exact pulse period burst length frame length or other repetitive signal characteristic Remote command TRIGger SEQuence TIME RINTerval on page 107 Trigger Offset Defines the time offset between the trigger event and the start of the measurement offset 0 Start of the measurement is delayed offset 0 Measurement starts earlier pre trigger Only possible for zero span e g UO Analyzer application and gated trigger switched off Maximum allowed range limited by the measurement time pretrigger max measurement time Tip To determine the trigger point in the sample for External or IF Power trigger source use the TRACe 10 TPTSample command Remote command TRIGger SEQuence HOLDoff TIME on page 103 Hysteresis Defines the distance in dB to the trigger level that the trigger source must exceed before a trigger event occurs Settting a hysteresis avoids unwanted trigger events caused by noise oscillation around the trigger level This setting is only available for IF Power trigger sources The range of the value is between 3 dB and 50 dB with a step width of 1 dB Remote command TRIGger SEQuence IFPower HYSTeresis on
85. e and protocol send the following commands e Visa viClear e GPIB ibclr e RSIB RSDLLibclr Now you can send the ABORt command on the remote channel performing the mea surement Example ABOR INIT IMM Aborts the current measurement and immediately starts a new one Example ABOR WAI INIT IMM Aborts the current measurement and starts a new one once abortion has been completed Performing Measurements Usage Event SCPI confirmed INITiate lt n gt CONMeas This command restarts a single measurement that has been stopped using ABORt or finished in single measurement mode The measurement is restarted at the beginning not where the previous measurement was stopped As opposed to INI Tiate lt n gt IMMediate this command does not reset traces in maxhold minhold or average mode Therefore it can be used to continue measure ments using maxhold or averaging functions Suffix lt n gt irrelevant Usage Event Manual operation See Continue Single Sweep on page 57 INITiate lt n gt CONTinuous lt State gt This command controls the measurement mode for an individual measurement chan nel Note that in single measurement mode you can synchronize to the end of the mea surement with OPC OPC or WAI In continuous measurement mode synchroniza tion to the end of the measurement is not possible Thus it is not recommended that you use continuous measurement mode in remote control as
86. e commands In this case some but not all param eters from the previously selected application are passed on to the UO Analyzer chan nel In order to retain all relevant parameters from the current application for the UO measurement use the TRACe TO STATe command to change the application of the current channel A measurement is started immediately with the default settings when the channel is activated Different remote modes available In remote control two different modes for the I Q Analyzer measurements are availa ble e A quick mode for pure data acquisition This mode is activated by default with the TRACe 10 STATe command The evaluation functions are not available however performance is slightly improved Amore sophisticated mode for acquisition and analysis This mode is activated when a new channel is opened for the UO Analyzer applica tion INST CRE NEW INST CRE REPL or by an additional command see TRACe IQ EVAL on page 74 Ke EH eege m 71 INSTrument GREate DUPLicale roter iran erra ehe nei irre E naka nA alada 71 INSTTUMENCORESTE EE EE 71 INS Pet EE uiti ertet AAA eo edo ei 72 Activating UO Analyzer Measurements INS froment DELE Enss n aec ete senno tet terat er ay a ei patet eraat eadein eds 72 INSTrumentLIS T2 ceto oa neo rn lcd 73 TINS Er fient TEEN 73 EEN Tit E D E 73 SYSTem GE E NEE e EE 74 KE Gel EV Alle CL V
87. e connector until the Send Trigger button is selected Then a low pulse is provided CH Providing trigger signals as output is described in detail in the R amp S FSWP User Man ual 4 3 1 Q Data Import and Export Baseband signals mostly occur as so called complex baseband signals i e a signal representation that consists of two channels the in phase 1 and the quadrature Q channel Such signals are referred to as UO signals UO signals are useful because the specific RF or IF frequencies are not needed The complete modulation information and even distortion that originates from the RF IF or baseband domains can be ana lyzed in the I Q baseband Importing and exporting UO signals is useful for various applications e Generating and saving UO signals in an RF or baseband signal generator or in external software tools to analyze them with the R amp S FSWP later User Manual 1177 5856 02 02 24 Basics on FFT e Capturing and saving l Q signals with an RF or baseband signal analyzer to ana lyze them with the R amp S FSWP or an external software tool later For example you can capture UO data using the I Q Analyzer application and then per form analog demodulation on that data using the R amp S FSWP AnalogDemodulation application if available As opposed to storing trace data which may be averaged or restricted to peak values UO data is stored as it was captured without further processing The data is stored as complex
88. e defined number of sweeps has been performed While the measurement is running the Single Sweep softkey and the RUN SINGLE key are highlighted The running measurement can be aborted by selecting the high lighted softkey or key again Note Sequencer If the Sequencer is active the Single Sweep softkey only controls the sweep mode for the currently selected channel however the sweep mode only has an effect the next time the Sequencer activates that channel and only for a chan nel defined sequence In this case a channel in single sweep mode is swept only once by the Sequencer User Manual 1177 5856 02 02 56 5 8 5 9 QD Display Configuration Furthermore the RUN SINGLE key controls the Sequencer not individual sweeps RUN SINGLE starts the Sequencer in single mode If the Sequencer is off only the evaluation for the currently displayed measurement channel is updated For details on the Sequencer see the R amp S FSWP User Manual Remote command INITiate n IMMediate on page 78 Continue Single Sweep After triggering repeats the number of sweeps set in Sweep Count without deleting the trace of the last measurement While the measurement is running the Continue Single Sweep softkey and the RUN SINGLE key are highlighted The running measurement can be aborted by selecting the highlighted softkey or key again Remote command INITiate lt n gt CONMeas on page 77 Display Configuration The ca
89. ed at the beginning of the capture buffer for post trigger samples values are filled up or omitted at the end of the capture buffer 4 2 3 Input from Noise Sources The R amp S FSWP provides a connector NOISE SOURCE CONTROL with a voltage supply for an external noise source By switching the supply voltage for an external noise source on or off in the firmware you can activate or deactive the device as required External noise sources are useful when you are measuring power levels that fall below the noise floor of the R amp S FSWP itself for example when measuring the noise level of an amplifier In this case you can first connect an external noise source whose noise power level is known in advance to the R amp S FSWP and measure the total noise power From this value you can determine the noise power of the R amp S FSWP Then when you measure the power level of the actual DUT you can deduct the known noise level from the total power to obtain the power level of the DUT The noise source is controlled in the Output settings see Noise Source on page 39 User Manual 1177 5856 02 02 23 R amp S9 FSWP B1 Basics on l Q Data Acquisition and Processing pem X H Wp or 4 2 4 Receiving and Providing Trigger Signals Using one of the TRIGGER connectors of the R amp S FSWP the R amp S FSWP can use a signal from an external reference as
90. ed using the FORMat DATA The possible for mats are described here e ASCII Format FORMat ASCII The data is stored as a list of comma separated values CSV of the measured val ues in floating point format e Binary Format FORMat REAL 32 The data is stored as binary data Definite Length Block Data according to IEEE 488 2 each measurement value being formatted in 32 Bit IEEE 754 Floating Point Format The schema of the result string is as follows 41024 lt valuel gt lt value2 gt lt value n with 4 number of digits 4 in the example of the following number of data bytes 1024 number of following data bytes 1024 in the example lt Value gt 4 byte floating point value Reading out data in binary format is quicker than in ASCII format Thus binary format is recommended for large amounts of data Reference Format Description for I Q Data Files This section describes how UO data is transferred to the memory during remote control see TRACe 10 DATA FORMat on page 84 command For details on the format of the individual values see chapter A 1 Formats for Returned Values ASCII Format and Binary Format on page 133 Reference Format Description for UO Data Files For details on the format of UO export files using the UO Export function see the R amp S FSWP User Manual COMPatible IQBLock IQPair mode I Data 0 I Data 1 G Data 1 Data 2 Q Data 2 512k Q Data 512k
91. enaming remote sd Replacing remote ssia inneas 72 Selecting remote EE 73 Measurement time Auto settings 4 59 Displayed a1 1 Q data Ett ed eege ia eg ER Modulation Inverted UO remote inverted IG ct corel tee Ct iret es MSRA Analysis interval Operating mode Multiple Measurement channels AA 10 N Noise Cancellation CP ACLR eene Cancellation remote control wi Cancellation softkey sseese Correction see Cancellation lem O Offset BIET 11 LS Une 45 Reference level AA 41 Options Bandwidth extension saridunen nnes a 20 High pass filter CAMPING scrasa ia N e Output NOIS SQUICE E 23 39 Paramielers tacna 22 Sample rate definition A 19 MIA 39 Overload RF IDE cra aan 22 RF input remote eode cinto 92 Overview Configura E 33 P Parameters lee IEN 22 Output Peak list Evaluation method 2 reete 16 Peak search Retrieving results remote ssssssess 88 Performance EFT Parameters tege Ee ict alee 29 Performing UO Analyzer Measurement n 61 Ports Power sensors Migger mode cute teret rtr 48 Preamplifier SONO t 42 EL cani A 42 Presetting ENT E 35 A EES 49 Programming examples e KEE Protection RF input RF input remote R elle A3 RBW hardware setting AAA 12 Real Imag I Q Evaluation
92. epus tei house oo n SEARA EREKE EDEA 71 INSTrument GREato REPLACO curtir repro teta tm t eed page tg ed et ptu cruda e ed XE Du ER 72 INSTrument CREate NEW INS Pica tits RTE INSTRUMENT EIS EE 73 INS Tr mebt GI El EE 73 IINSTr mient SELEC HEEN 73 LAYOUT TRIER ll TEE 122 RN del REITER 123 LAYout IDENtify WINDow zi EAYout REMove E WINBOYg rentrer rnt n rt nere enne rr ee ren nep LAY out REPLace l WINDOW itor rrr rro ter rr rere tra Fere rh rne ee Ee creen LAY OUt SPLICE sc eat ecco EAYOUtWINDOWSnDs AIDDO eo ctae A EA d e ay v t Ene dun 126 LAY out ld Ta LE 126 EAYOUCWINDOWSmIns REMO eorr ttr erae tee ctore Seen naue uso IER asineU Scr qe mua nns aio tea LAYout WINDow lt n gt REPLace xis MMEMOry Ee Hiep wr e a MMEMON STORe hn gt I0 COMMENE croire ora egere rp sensor tee eek e Yep eru ETE UE eek e REX UE FE nee pce ag 128 MMEMory STORe Sns IQ STA RE 129 MMEMory s3Eo cllc 91 OUTPUEMRIGGErS Pons DIRECCION costaria 107 OUTPut TRIGgersport EVOL vicio Rer nen ce eere Ree eene Pp 108 EEN ege ee ee ein Geh d EE 108 OUTPut TRSIGgersport PULbSe IMMeHdlialte rnn inrer rone a e gereret tb e ert tn Fixer aeree pecu 108 OUTPut TRIGgersport PULSe LENGIRh retro rer nennen rn tin ert eren TE an 109 S ER Ge TT RE 95 Il GT eer RE TE 95 SYST m PRESSECHANnel EXE
93. er Strings Strings are alphanumeric characters They have to be in straight quotation marks You can use a single quotation mark or a double quotation mark Example INSTRument DELete Spectrum Block Data Block data is a format which is suitable for the transmission of large amounts of data The ASCII character introduces the data block The next number indicates how many of the following digits describe the length of the data block In the example the 4 follow ing digits indicate the length to be 5168 bytes The data bytes follow During the trans mission of these data bytes all end or other control signs are ignored until all bytes are Common Suffixes transmitted 0 specifies a data block of indefinite length The use of the indefinite for mat requires a NL END message to terminate the data block This format is useful when the length of the transmission is not known or if speed or other considerations prevent segmentation of the data into blocks of definite length 8 2 Common Suffixes The following common suffixes are used in remote commands specific to the UO Ana lyzer application Suffix Value range Description m 1 16 Marker n 1 6 Window t 1 6 Trace 8 3 Activating UO Analyzer Measurements UO Analyzer measurements require a special measurement channel on the R amp S FSWP It can be activated using the common INSTrument CREate NEW or INSTrument CREate REPLac
94. eration All different information areas are labeled They are explained in more detail in the follow ing sections R amp S FSWP B1 Welcome to the UO Analyzer Application MultiView Spectrum Spectrum 2 IQ Analyzer Ref Level 0 00 r AQT 1 3 SRate 32 0 MHz Att 10d Freq 3 MHz Rec Length specu 2 CF 30 0 MHz O 1001 pts Span 32 0 MHz Fig 2 1 Screen elements in the l Q Analyzer application 1 Channel bar for firmware and measurement settings 2 3 Window title bar with diagram specific trace information 4 Diagram area with marker information 5 Diagram footer with diagram specific information depending on result display 6 Instrument status bar with error messages progress bar and date time display MSRA operating mode In MSRA operating mode additional tabs and elements are available A colored back ground of the screen behind the measurement channel tabs indicates that you are in MSRA operating mode For details on the MSRA operating mode see the R amp S FSWP MSRA User Manual Channel bar information In the UO Analyzer application the R amp S FSWP shows the following settings Table 2 1 Information displayed in the channel bar for the I Q Analyzer application Ref Level Reference level m el Att Mechanical and electronic RF attenuation Ref Offset Reference level offset Freq Center frequency Meas Time Measurement time Rec Length Defined record length number of sampl
95. es outside of this range e g for fullspan measurements the measurement may be aborted and a message indicating the allowed input frequencies is displayed in the status bar A Trigger Offset Trigger Polarity and Trigger Holdoff to improve the trigger stabil ity can be defined for the RF trigger but no Hysteresis Remote command TRIG SOUR RFP see TRIGger SEQuence SOURce on page 106 Power Sensor Trigger Source Uses an external power sensor as a trigger source This option is only available if a power sensor is connected and configured Note For R amp S power sensors the Gate Mode Lv is not supported The signal sent by these sensors merely reflects the instant the level is first exceeded rather than a time period However only time periods can be used for gating in level mode Thus the trigger impulse from the sensors is not long enough for a fully gated measurement the measurement cannot be completed Remote command TRIG SOUR PSE see TRIGger SEQuence SOURce on page 106 Configuring Triggered Measurements Time Trigger Source Triggers in a specified repetition interval Remote command TRIG SOUR TIME see TRIGger SEQuence SOURce on page 106 Trigger Level Defines the trigger level for the specified trigger source For details on supported trigger levels see the data sheet Remote command TRIGger SEQuence LEVel IFPower on page 105 TRIGger SEQuence LEVel IQPower on pag
96. es to capture EH User Manual 1177 5856 02 02 11 Understanding the Display Information SRate Defined sample rate for data acquisition RBW Spectrum evaluation only Resolution bandwidth calculated from the sample rate and record length In addition the channel bar also displays information on instrument settings that affect the measurement results even though this is not immediately apparent from the display of the measured values e g transducer or trigger settings This information is dis played only when applicable for the current measurement For details see the R amp S FSWP Getting Started manual Window title bar information For each diagram the header provides the following information 3 Magnitude Fig 2 2 Window title bar information in the I Q Analyzer application 1 Window number 2 Window type 3 Trace color 4 Trace number 5 Detector 6 Trace mode Diagram footer information The information in the diagram footer beneath the diagram depends on the evalua tion Center frequency e Number of sweep points e Range per division x axis Span Spectrum Status bar information Global instrument settings the instrument status and any irregularities are indicated in the status bar beneath the diagram Furthermore the progress of the current operation is displayed in the status bar 3 Measurement and Result Displays The UO Analyzer can capture I Q data The
97. eter mines the length of the measurement Parameters Mode AUTO The R amp S FSWP determines the measurement length automati cally according to the current input data MANual The R amp S FSWP uses the measurement length defined by SENSe ADJust CONFigure DURation on page 119 RST AUTO Manual operation See Resetting the Automatic Measurement Time Meastime Auto on page 59 See Changing the Automatic Measurement Time Meastime Manual on page 59 SENSe ADJust CONFigure HYSTeresis LOWer Threshold When the reference level is adjusted automatically using the SENSe ADJust LEVel on page 121 command the internal attenuators and the preamplifier are also adjusted In order to avoid frequent adaptation due to small changes in the input signal you can define a hysteresis This setting defines a lower threshold the signal must fall below compared to the last measurement before the reference level is adapted auto matically Configuring UO Analyzer Measurements Parameters Threshold Range O dB to 200 dB RST 1 dB Default unit dB Example SENS ADJ CONF HYST LOW 2 For an input signal level of currently 20 dBm the reference level will only be adjusted when the signal level falls below 18 dBm Manual operation See Lower Level Hysteresis on page 59 SENSe ADJust CONFigure HYSTeresis UPPer Threshold When the reference level is adjusted automatically using the SENSe ADJust L
98. except for a few functions e Configuring Level Characherlsttce nennen 40 e Scaling tlie l Gvel AXIS ccn rette ente n tea a eden ex Cr RR EO EY pads 43 Configuring Level Characteristics To configure the amplitude settings Amplitude settings can be configured via the AMPT key or in the Amplitude dialog box gt To display the Amplitude dialog box do one of the following e Select Amplitude from the Overview e Select the AMPT key and then the Amplitude Config softkey Functions to configure amplitude characteristics described elsewhere Input Coupling on page 37 e Impedance on page 37 e Scaling settings are described in chapter 5 4 2 Scaling the Level Axis on page 43 Configuring the Amplitude The remote commands required to configure amplitude characteristics are described in chapter 8 6 3 Configuring Level Characteristics on page 95 chapter 8 6 4 Con figuring the Attenuator on page 97 and chapter 8 6 5 Configuring the Preampli fier on page 98 SE E e EE 41 L Shifting the Display Offset 41 Ro HERE 41 L Setting the Reference Level Automatically Auto Level 42 Attenuation Mode 7 TEE 42 i em 42 Noise Calc TEE 43 Reference Level Defines the expected maximum reference level Signal levels above this value may not be measured correctly This is indicated by an IF OVLD status display The reference level is als
99. f of each window overlaps the previous window in FFT calcu lation Usage SCPI confirmed Manual operation See Window Overlap on page 54 SENSe IQ FFT WINDow TYPE Function In the UO Analyzer you can select one of several FFT window types Parameters Function BLACkharris Blackman Harris FLATtop Flattop GAUSsian Gauss RECTangular Rectangular P5 5 Term RST FLAT Example IQ FFT WIND TYPE GAUS Usage SCPI confirmed Manual operation See Window Function on page 54 SENSe SWAPiq State This command defines whether or not the recorded UO pairs should be swapped I gt Q before being processed Swapping and Q inverts the sideband Configuring UO Analyzer Measurements This is useful if the DUT interchanged the and Q parts of the signal then the R amp S FSWP can do the same to compensate for it Parameters State ON and Q signals are interchanged Inverted sideband Q j l OFF and Q signals are not interchanged Normal sideband I j Q RST OFF Manual operation See Swap l Q on page 52 TRACe IQ BWIDth This command defines or queries the bandwidth of the resampling filter The bandwidth of the resampling filter depends on the sample rate Parameters Bandwidth For details on the maximum bandwidth see chapter 4 1 1 Sam ple Rate and Maximum Usable UO Bandwidth for RF Input on page 19 Manual operation See Analysis Bandwidth on page 52 TRACe IQ RLENgth
100. functions CharacteristiGS eec cotto re ert a 26 LW WEE 26 Window title bar information ee 12 Windows Adding REMOTE sens cies iria tenores 122 Closing remote cct eee 124 127 CONTIQUIING EE A 35 Layout remote 124 Maximizing remote 122 Querying remote 123 Replacing remote 124 Splitting remote AAA 122 TYPES remote i ci rica 122 Y Y axis SCAN veria o 44 Scaling VQ Vectra 44 YIG preselector Activating Deactivating esee 38 Activating Deactivating remote s 93
101. h 1 gt lt Channel gt lt PowerVsTime gt lt Min gt lt ArrayOfFloat length 256 gt lt float gt 134 lt float gt lt float gt 142 lt float gt lt float gt 140 lt float gt lt ArrayOfFloat gt lt Min gt lt Max gt lt ArrayOfFloat length 256 gt lt float gt 70 lt float gt lt float gt 71 lt float gt lt float gt 69 lt float gt lt ArrayOfFloat gt lt Max gt lt PowerVsTime gt lt Spectrum gt lt Min gt lt ArrayOfFloat length 256 gt lt float gt 133 lt float gt lt float gt 111 lt float gt lt float gt 111 lt float gt lt ArrayOfFloat gt lt Min gt lt Max gt lt ArrayOfFloat length 256 gt lt float gt 67 lt float gt float 69 float float 70 float float 69 float ArrayOfFloat Scaling Factor Numerical value Numerical value x ScalingFac tor Minimum negative int16 value 215 32768 1V Maximum positive int16 value 215 1 32767 0 999969482421875 V A 3 2 UO Data File Format iq tar lt Max gt lt Spectrum gt IQ lt Histogram width 64 height 64 gt 0123456789 0 lt Histogram gt IQ lt Channel gt lt ArrayOfChannel gt lt PreviewData gt UO Data Binary File The I Q data is saved in binary format according to the format and data type specified in the XML file See Format element and DataType element To allow reading and writing of streamed UO data all data is interleaved i e
102. he corresponding application User Manual The Overview for the I Q Analyzer Master provides quick access to the following con figuration dialog boxes listed in the recommended order of processing 1 Configuring the input See chapter 5 3 1 Inputs on page 36 2 Configuring level characteristics See chapter 5 4 Configuring the Amplitude on page 40 3 Configuring Frequency Characteristics See chapter 5 5 Configuring Frequency Characteristics on page 44 4 Configuring triggered and gated measurements See chapter 5 6 Configuring Triggered Measurements on page 46 5 Configuring the output See chapter 5 3 2 Outputs on page 38 6 Configuring the bandwidth See chapter 5 7 Data Acquisition and Bandwidth Settings on page 50 7 Analyzing results See the User Manual of the R amp S FSWP 8 Configuring the display See chapter 5 8 Display Configuration on page 57 Import Export Functions To configure settings P Select any button in the Overview to open the corresponding dialog box Select a setting in the channel bar at the top of the measurement channel tab to change a specific setting For step by step instructions on configuring UO Analyzer measurements see chap ter 7 1 How to Perform Measurements in the UO Analyzer Application on page 61 SITE EE 35 SPECI CS POM ET 35 Preset Channel Select the Preset Channel button in the lower lefthand corner of the Overview to restore all
103. he number of gate periods after the trigger signal for gated measurements with the I Q analyzer Parameters Number Range 1 to 1023 RST 1 Example TRAC IQ EGAT NOF 2 TRACe IQ EGATe TYPE Type This command selects the gate mode for gated measurements with the UO analyzer Note The IF power trigger holdoff time is ignored if you are using the Level gate mode in combination with an IF Power trigger Parameters Type LEVel EDGE RST EDGE Example TRAC IQ EGAT TYPE LEV Configuring Data Acquisition Useful commands for UO data acquisition described elsewhere e SENSe SWEep COUNt on page 81 e SENSe SWEep POINts on page 81 e SENSe SWEep TIME on page 82 SENSe IQ BANDwidth BWIDth MODE ecce ntetnttettntnnis 112 SENSe IO BANDwidhlDWIDO RE Golutton seen 112 PENSEI FF TORO gl DE 113 SENSe IQ FFT LENGtR eeceeeeeet teet ttes ttt tette te tense rrans 113 ISENS amp JIGEEFTANINDOVWELD ENGL eeneg eeu sett Ee ea Ren ES ee en 113 SENSeJIQ FFT WINBOW OVERIap undue ctp no ern rrt idad 114 SENSeIIGEEFTWINDOWSTYPI EE 114 priu DUE ee 114 HEET e em 115 TRACHIORLEN oie TR 115 Ira 115 RRE xm 117 TRAGCSIOTTPISample E 117 Configuring UO Analyzer Measurements SENSe IQ BANDwidth BWIDth MODE Mode This command defines how the resolution bandwidth is determined Parameters Mode AUTO MANual FFT AUTO Default
104. his state is indicated by a status bit in the STATus OPERation reg ister bit 5 as well as by a low level signal at the AUX port pin 9 User Defined Sends a trigger when user selects Send Trigger button In this case further parameters are available for the output signal Remote command OUTPut TRIGger lt port gt OTYPe on page 108 5 4 5 4 1 Configuring the Amplitude Level Output Type Trigger 1 2 Defines whether a constant high 1 or low 0 signal is sent to the output connector Remote command OUTPut TRIGger lt port gt LEVel on page 108 Pulse Length Output Type Trigger 1 2 Defines the length of the pulse sent as a trigger to the output connector Remote command OUTPut TRIGger lt port gt PULSe LENGth on page 109 Send Trigger Output Type Trigger 1 2 Sends a user defined trigger to the output connector immediately Note that the trigger pulse level is always opposite to the constant signal level defined by the output Level setting e g for Level High a constant high signal is output to the connector until the Send Trigger button is selected Then a low pulse is sent Which pulse level will be sent is indicated by a graphic on the button Remote command OUTPut TRIGger lt port gt PULSe IMMediate on page 108 Configuring the Amplitude The amplitude is configured in the Amplitude dialog box Amplitude settings are simi lar to those of the Spectrum application
105. ine Help is embedded in the instrument s firmware It offers quick context sen sitive access to the complete information needed for operation and programming Online help is available using the icon on the toolbar of the R amp S FSWP Getting Started This manual is delivered with the instrument in printed form and in PDF format on the DVD It provides the information needed to set up and start working with the instru ment Basic operations and handling are described Safety information is also included User Manuals User manuals are provided for the base unit and each additional firmware application The user manuals are available in PDF format in printable form on the Documenta tion DVD delivered with the instrument In the user manuals all instrument functions are described in detail Furthermore they provide a complete description of the remote control commands with programming examples The user manual for the base unit provides basic information on operating the R amp S FSWP in general and the Spectrum application in particular Furthermore the software functions that enhance the basic functionality for various applications are described here An introduction to remote control is provided as well as information on maintenance instrument interfaces and troubleshooting In the individual application manuals the specific instrument functions of the applica tion are described in detail For additional information on defau
106. l Level This command defines the level of the signal generated at the trigger output This command works only if you have selected a user defined output with oUT Put TRIGger port 0TYPe Suffix port Selects the trigger port to which the output is sent 2 trigger port 2 rear Parameters Level HIGH TTL signal LOW OV RST LOW Manual operation See Trigger 1 2 on page 39 See Level on page 40 OUTPut TRIGger lt port gt OTYPe lt OutputT ype gt This command selects the type of signal generated at the trigger output Suffix lt port gt Selects the trigger port to which the output is sent 2 trigger port 2 rear panel Parameters lt OutputType gt DEVice Sends a trigger signal when the R amp S FSWP has triggered inter nally TARMed Sends a trigger signal when the trigger is armed and ready for an external trigger event UDEFined Sends a user defined trigger signal For more information see OUTPut TRIGger lt port gt LEVel RST DEVice Manual operation See Output Type on page 39 OUTPut TRIGger lt port gt PULSe IMMediate This command generates a pulse at the trigger output Suffix lt port gt Selects the trigger port to which the output is sent 2 trigger port 2 rear Usage Event 8 6 10 Configuring UO Analyzer Measurements Manual operation See Send Trigger on page 40 OUTPut TRIGger lt port gt PULSe LENGth Length This command defines the length of the pulse
107. le selection dialog box to select an import file that contains IQ data This function is only available in single sweep mode and only in applications that process UO data such as the UO Analyzer or optional applications Note that the I Q data must have a specific format as described in the R amp S FSWP UO Analyzer and UO Input User Manual UO import is not available in MSRA mode Remote command MMEMory LOAD IQ STATe on page 128 Export Opens a submenu to configure data export UO Export Export Opens a file selection dialog box to select an export file to which the IQ data will be stored This function is only available in single sweep mode and only in applications that process l Q data such as the UO Analyzer or optional applications Note Secure user mode In secure user mode settings that are to be stored on the instrument are stored to vol atile memory which is restricted to 256 MB Thus a Memory full error may occur although the hard disk indicates that storage space is still available To store data permanently select an external storage location such as a USB memory device For details see Protecting Data Using the Secure User Mode in the Data Manage ment section of the R amp S FSWP User Manual Remote command MMEMory STORe lt n gt 1Q STATe on page 129 MMEMory STORe lt n gt 1IQ COMMent on page 128 Configuring Data Inputs and Outputs The R amp S FSWP can analyze signals from different in
108. lo dco E 93 Eege UPORI VALURI EE 94 INPULWIPORES TA wur T 94 INPut ATTenuation PROTection RESet This command resets the attenuator and reconnects the RF input with the input mixer after an overload condition occured and the protection mechanism intervened The error status bit bit 3 in the STAT QUES POW status register and the INPUT OVLD message in the status bar are cleared The command works only if the overload condition has been eliminated first For details on the protection mechanism see chapter 4 2 1 RF Input Protection on page 22 Usage Event INPut COUPling lt CouplingType gt This command selects the coupling type of the RF input Parameters lt CouplingType gt AC AC coupling DC DC coupling RST AC Example INP COUP DC Usage SCPI confirmed Manual operation See Input Coupling on page 37 INPut FILTer HPASs STATe lt State gt Activates an additional internal high pass filter for RF input signals from 1 GHz to 3 GHz This filter is used to remove the harmonics of the R amp S FSWP in order to mea sure the harmonics for a DUT for example This function requires an additional high pass filter hardware option Note for RF input signals outside the specified range the high pass filter has no effect For signals with a frequency of approximately 4 GHz upwards the harmonics are suppressed sufficiently by the YIG filter Parameters lt State gt ON OFF RST OFF Configuring UO Anal
109. location and enter a file name o Ny o mF o Select Save The captured data is stored to a file with the extension ig tar Importing UO data 1 Press the MODE key and select the IQ Analyzer or any other application that supports UO data If necessary switch to single sweep mode by pressing the RUN SINGLE key Select the E Open icon in the toolbar Select the I Q Import softkey Select the storage location and the file name with the iq tar file extension oa BR o DN Select Open The stored data is loaded from the file and displayed in the current application Previewing the I Q data in a web browser The iq tar file format allows you to preview the I Q data in a web browser 1 Use an archive tool e g WinZip or PowerArchiver to unpack the iq tar file into a folder 2 Locate the folder using Windows Explorer 3 Open your web browser gt xzy xml file D ay xml e D xzy xml xzy xml of iq tar file How to Export and Import I Q Data 4 Drag the l Q parameter XML file e g example xml into your web browser Saved by FSV IQ Analyzer Comment Here is a comment Date amp Time 2011 03 03 14 33 05 Sample rate 6 5 MHz Number of samples 65000 Duration of signal 10 ms Data format complex float32 Data filename xzy complex 1ch float32 Scaling factor 1v
110. lt NoOfSamples gt This command sets the record length for the acquired UO data Increasing the record length also increases the measurement time Note Alternatively you can define the measurement time using the SENS SWE TIME command Parameters lt NoOfSamples gt Number of samples to record See chapter 4 1 1 Sample Rate and Maximum Usable UO Bandwidth for RF Input on page 19 RST 1001 Example TRAC IQ RLEN 256 Manual operation See Record Length on page 52 TRACe IQ SET NORM 0 lt SampleRate gt lt TriggerMode gt lt TriggerSlope gt lt PretriggerSamp gt lt NumberSamples gt This command sets up the R amp S FSWP for UO measurements If you do not use this command to set up UO measurements the R amp S FSWP will use its current settings for UO measurements Configuring UO Analyzer Measurements If the 1 Q Analyzer has not been turned on previously the command also switches to the UO Analyzer Note If you use the default settings with TRACe 10 DATA the following minimum buffer sizes for the response data are recommended ASCII format 10 kBytes 4 Binary format 2 kBytes Parameters NORM This value is always NORM 0 This value is always 0 lt SampleRate gt Sample rate for the data acquisition Range 100 Hz to 10 GHz continuously adjustable RST 32000000 lt TriggerMode gt Selection of the trigger source used for the measurement IMMediate EXTernal EXT2 EXT
111. lt n gt MARKer lt m gt FUNCtion FPEaks SORT lt n gt lt m gt are irrelevant Return values lt PeakPosition gt Position of the peaks on the y axis The unit depends on the measurement Usage Query only CALCulate lt n gt DELTamarker lt m gt X lt Position gt This command moves a delta marker to a particular coordinate on the x axis If necessary the command activates the delta marker and positions a reference marker to the peak power Parameters lt Position gt Numeric value that defines the marker position on the x axis Range The value range and unit depend on the measure ment and scale of the x axis Example CALC DELT X Outputs the absolute x value of delta marker 1 CALCulate lt n gt DELTamarker lt m gt Y This command queries the relative position of a delta marker on the y axis If necessary the command activates the delta marker first To get a valid result you have to perform a complete measurement with synchroniza tion to the end of the measurement before reading out the result This is only possible for single measurement mode The unit depends on the application of the command Retrieving Results Return values Position Position of the delta marker in relation to the reference marker or the fixed reference Example INIT CONT OFF Switches to single sweep mode INIT WAI Starts a sweep and waits for its end CALC DELT2 ON Switches on delta marker 2 CALC DELT2 Y
112. lt n gt REPLace lt WindowType gt This command changes the window type of an existing window specified by the suffix lt n gt in the active measurement channel The result of this command is identical to the LAYout REPLace WINDow com mand To add a new window use the LAYout NINDow lt n gt ADD command Parameters lt WindowType gt Type of measurement window you want to replace another one with See LAYout ADD WINDow on page 122 for a list of availa ble window types Example LAY WIND2 REPL MTAB Replaces the result display in window 2 with a marker table Analyzing Results For a comprehensive description of the commands required to analyze results trace and marker functionality please refer to the R amp S FSWP User Manual GAL Gulatesn gt MARKer lt m gt SEAR Clinical 127 CAL Culate lt n gt MARKer lt m gt SEARch lt MarkReallmag gt This command selects the trace type a marker search is performed on For all markers lt m gt is irrelevant 8 8 Importing and Exporting I Q Data Parameters lt MarkReallmag gt REAL Marker search functions are performed on the real trace of the 1 Q measurement IMAG Marker search functions are performed on the imaginary trace of the 1 Q measurement MAGN Marker search functions are performed on the magnitude of the and Q data RST REAL Example CALC4 MARK SEAR IMAG Manual operation See Branch for Peak Search on page 60 Imp
113. lt settings and parame ters refer to the data sheets Basic information on operating the R amp S FSWP is not included in the application manuals Release Notes The release notes describe the installation of the firmware new and modified func tions eliminated problems and last minute changes to the documentation The corre sponding firmware version is indicated on the title page of the release notes 1 3 1 3 1 1 3 2 1 3 3 Conventions Used in the Documentation Application Notes Application notes application cards white papers and educational notes are further publications that provide more comprehensive descriptions and background informa tion The latest versions are available for download from the Rohde amp Schwarz web site at www rohde schwarz com appnote Conventions Used in the Documentation Typographical Conventions The following text markers are used throughout this documentation Convention Description Graphical user interface ele All names of graphical user interface elements on the screen such as ments dialog boxes menus options buttons and softkeys are enclosed by quotation marks KEYS Key names are written in capital letters File names commands File names commands coding samples and screen output are distin program code guished by their font Input Input to be entered by the user is displayed in italics Links Links that you can click are displayed in blue fo
114. mat of response data TRAC 10 DATA Starts measurement and reads results Query only TRACe IQ DATA FORMat Format This command selects the order of the UO data For details see chapter A 2 Reference Format Description for I Q Data Files on page 133 Parameters Format COMPatible IQBLock IQPair COMPatible and Q values are separated and collected in blocks A block 512k of values is followed by a block 512k of Q values fol lowed by a block of values followed by a block of Q values etc 4 1 Q Q Q Q IIII Q Q Q Q IQBLock First all l values are listed then the Q values 1 1 1 1 1 1 Q Q Q Q Q Q IQPair One pair of UO values after the other is listed 1 Q 1 Q 1 Q RST IQBL TRACe IQ DATA MEMory lt OffsetSamples gt lt NoOfSamples gt This command queries the UO data currently stored in the memory of the R amp S FSWP Retrieving Results By default the command returns all UO data in the memory You can however narrow down the amount of data that the command returns using the optional parameters By default the amount of available data depends on TRACe 10 SET Parameters lt OffsetSamples gt lt NoOfSamples gt Return values lt lQData gt Example Usage Selects an offset at which the output of data should start in rela tion to the first data If omitted all captured samples are output starting with the first sample Range 0 to
115. measurement settings in the current channel to their default values Note that the PRESET key restores the entire instrument to its default values and thus closes all measurement channels on the R amp S FSWP except for the default channel Remote command SYSTem PRESet CHANnel EXECute on page 74 Specifics for The measurement channel may contain several windows for different results Thus the settings indicated in the Overview and configured in the dialog boxes vary depending on the selected window Select an active window from the Specifics for selection list that is displayed in the Overview and in all window specific configuration dialog boxes The Overview and dialog boxes are updated to indicate the settings for the selected window Import Export Functions The following import and export functions are available via softkeys in the Save Recall menu which is displayed when you select the Save or Open icon in the tool bar Some functions for particular data types are also available via softkeys or dialog boxes in the corresponding menus e g trace data or marker peak lists For a description of the other functions in the Save Recall menu see the R amp S FSWP User Manual at ei 36 A sta ces sade ORO 36 A EN 36 L uo Espont nono ron nranarananararrrrraranaaia 36 5 3 5 3 1 Configuring Data Inputs and Outputs Import Provides functions to import data UO Import Import Opens a fi
116. method eret ett eti ea 15 e Analyzer to petat ga cn cia 15 Rec Length hardware setting ssssssss 11 Record length Definition omen lala Ir e eerte ade l Q data nac nee ete eee tere tae de Relationship to sample rate Ref Level hardware setting sss Reference level EE Auto level II A MM OSIM tise tt SE Unit bc P Remote commands Basics on syntax Boolean valles cion conta canica tenu CapitaliZzatiO ciu mr Character data Data DIOCKS EE Numeric VAlUES occiso silicio trice Optional keywords A uai aasan e ug dE SUTIXOS me Remote control Dna 70 Fepetition interval ssar etre re tmr EN ERE set 49 Resampler Data process iTunes 18 Resetting IE Input protection EE 22 92 Restoring Channel Settings srir aaa nn ds 35 Result displays et 15 Magnitude Marker table retine letrinas 16 Peak li ii aia ed te eet ada 16 Real Imag I Q Geet e Results Data format remote A 86 VQ Analyzer remote eeh 83 Retrieving remote A 83 RF attenuation NU 42 Manual tc ii 42 RF input Overload protection 0 metet eene 22 Overload protection remote sssssssss 92 REMOTE E 93 RF Power Hale TEE 48 Trigger level remote eese 105 RUN CONT ROY ii irdi eaa rT a 56 RUN SINGLE KEY EE 56
117. n the reference level is adjusted automatically using the Auto Level function the internal attenuators and the preamplifier are also adjusted In order to avoid frequent adaptation due to small changes in the input signal you can define a hysteresis This setting defines a lower threshold the signal must fall below compared to the last mea surement before the reference level is adapted automatically Remote command SENSe ADJust CONFigure HYSTeresis UPPer on page 120 Lower Level Hysteresis When the reference level is adjusted automatically using the Auto Level function the internal attenuators and the preamplifier are also adjusted In order to avoid frequent adaptation due to small changes in the input signal you can define a hysteresis This setting defines a lower threshold the signal must fall below compared to the last mea surement before the reference level is adapted automatically Remote command SENSe ADJust CONFigure HYSTeresis LOWer on page 119 6 Analysis General result analysis settings concerning the trace markers lines etc can be config ured via the Analysis button in the Overview They are similar to the analysis func tions in the Spectrum application except for the features described here For more information please refer to the R amp S FSWP User Manual Branch for Peak Segr EE 60 Branch for Peak Search Defines which data is used for marker search functions in UO data This function is
118. n you need it For quick expert help with any Rohde amp Schwarz equipment contact one of our Customer Support Centers A team of highly qualified engineers provides telephone support and will work with you to find a solution to your query on any aspect of the operation programming or applications of Rohde amp Schwarz equipment Up to date information and upgrades To keep your instrument up to date and to be informed about new application notes related to your instrument please send an e mail to the Customer Support Center stating your instrument and your wish We will take care that you will get the right information Europe Africa Middle East Phone 49 89 4129 12345 customersupport rohde schwarz com North America Phone 1 888 TEST RSA 1 888 837 8772 customer support rsa rohde schwarz com Latin America Phone 1 410 910 7988 customersupport la rohde schwarz com Asia Pacific Phone 65 65 13 04 88 customersupport asia rohde schwarz com China Phone 86 800 810 8228 86 400 650 5896 customersupport china rohde schwarz com ROHDE amp SCHWARZ 1171 0200 22 06 00 R amp S FSWP B1 Contents MB Tr AA o AP aee aa r ar arara Ara aaa EE aao 5 bh WE ee Et i CHE 5 1 2 Documentation Overview cesses nnne nnne nnn an kun n kann anas a nenna nnmnnn 6 1 3 Conventions Used in the Documentation eeeeeeeeeeeeeeee eene nnn nnn 7 2 Welcome to the I Q Analyzer Application
119. nce of measurements by the Sequencer Its effect is similar to the INITiate lt n gt IMMediate command used for a single measurement Before this command can be executed the Sequencer must be activated see SYSTem SEQuencer on page 82 Suffix lt n gt irrelevant Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single sequence mode so each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements Usage Event Performing Measurements INITiate lt n gt SEQuencer MODE Mode This command selects the way the R amp S FSWP application performs measurements sequentially Before this command can be executed the Sequencer must be activated see SYSTem SEQuencer on page 82 A detailed programming example is provided in the Operating Modes chapter in the R amp S FSWP User Manual Note In order to synchronize to the end of a sequential measurement using OPC OPC or WAI you must use SING1e Sequence mode For details on synchronization see the Remote Basics chapter in the R amp S FSWP User Manual Suffix n irrelevant Parameters Mode SINGIe Each measurement is performed once regardless of the chan nel s sweep mode considering each channels sweep count until all measurements in all active channels have been per formed CONTinuous The measurements in each active channel are performed one after the other repeatedly regardles
120. nnel already exists the default name extended by a sequential number is used for the new channel INSTrument REName lt ChannelName1 gt lt ChannelName2 gt This command renames a measurement channel Parameters lt ChannelName1 gt String containing the name of the channel you want to rename lt ChannelName2 gt String containing the new channel name Note that you can not assign an existing channel name to a new channel this will cause an error Example INST REN PhaseNoise PNO Renames the channel with the name PhaseNoise to PNO Usage Setting only INSTrument SELect lt ChannelType gt lt ChannelName gt This command activates a new measurement channel with the defined channel type or selects an existing measurement channel with the specified name Activating UO Analyzer Measurements Also see e INSTrument CREate NEW on page 71 Parameters lt ChannelType gt Channel type of the new channel For a list of available channel types see INSTrument LIST on page 73 lt ChannelName gt String containing the name of the channel Example INST 10 Activates a measurement channel for the UO Analyzer applica tion evaluation mode To start a channel in the simple UO Analyzer mode useTRACe IQ STATe INST MyIQSpectrum Selects the measurement channel named MylQSpectrum for example before executing further commands for that channel Usage SCPI confirmed SYSTem PRESet CHANnel EXECute
121. nt References References to other parts of the documentation are enclosed by quota tion marks Conventions for Procedure Descriptions When describing how to operate the instrument several alternative methods may be available to perform the same task In this case the procedure using the touchscreen is described Any elements that can be activated by touching can also be clicked using an additionally connected mouse The alternative procedure using the keys on the instrument or the on screen keyboard is only described if it deviates from the standard operating procedures The term select may refer to any of the described methods i e using a finger on the touchscreen a mouse pointer in the display or a key on the instrument or on a key board Notes on Screenshots When describing the functions of the product we use sample screenshots These screenshots are meant to illustrate as much as possible of the provided functions and possible interdependencies between parameters Conventions Used in the Documentation The screenshots usually show a fully equipped product that is with all options instal led Thus some functions shown in the screenshots may not be available in your par ticular product configuration Starting the UO Analyzer Application 2 Welcome to the l Q Analyzer Application The R amp S FSWP UO Analyzer is a firmware application that adds functionality to per form UO data acquisition and analysis to
122. nt time calculated as the measurement time multiplied by the sample rate For the l Q data acquisition digital decimation filters are used internally in the R amp S FSWP The passband of these digital filters determines the maximum usable I Q bandwidth In consequence signals within the usable UO bandwidth passband remain unchanged while signals outside the usable UO bandwidth passband are suppressed Usually the suppressed signals are noise artifacts and the second IF side band If frequencies of interest to you are also suppressed you should try to increase the output sample rate since this increases the maximum usable UO band width As a rule the usable UO bandwidth is proportional to the output sample rate Yet when the UO bandwidth reaches the bandwidth of the analog IF filter at very high output sample rates the curve breaks 4 1 1 1 4 1 1 2 O Processing Analog UO Data from RF Input Bandwidili Extension Opulons culmina AS 20 e Relationship Between Sample Rate Record Length and Usable UO Bandwidth 20 e R amp S FSWP without additional bandwidth extension options 21 e R amp S FSWP with option B80 UO Bandwidth Extension 21 Bandwidth Extension Options Max usable UO BW 80 MHz Required B option B80 Relationship Between Sample Rate Record Length and Usable UO Bandwidth Up to the maximum bandwidth the following rule applies Usable I Q bandwid
123. nt trace data and measurement results The data format depends on FORMat DATA Query parameters lt ResultType gt Selects the type of result to be returned TRACE1 TRACE6 Returns the trace data for the corresponding trace Return values lt TraceData gt Returns the sweep point values as shown in the result display If you are measuring with the auto peak detector the command returns positive peak values only To retrieve negative peak val ues define a second trace with a negative peak detector For the Magnitude and Spectrum result displays in the I Q Ana lyzer application this command returns the magnitude of the and Q values I jQ for each sweep point 1001 values For the Real Imag I Q result display the command returns first the real parts for each trace point then the imaginary parts Jonn Q Q499 For the I Q Vector result display the and Q values for each trace point are returned 1001 pairs of and Q values Example TRAC TRACE3 Queries the data of trace 3 Usage SCPI confirmed Manual operation See Magnitude on page 13 See Spectrum on page 14 See Q Vector on page 15 See Real Imag 1 Q on page 15 TRACe lt n gt DATA MEMory lt Trace gt lt OffsSwPoint gt lt NoOfSwPoints gt This command queries the previously captured trace data for the specified trace from the memory As an offset and number of sweep points to be retrieved can be specified the trace data
124. o pins and must always be 0 The user port is written to with the given binary pattern If the user port is programmed to input instead of output see INPut UPORt STATe on page 94 the output value is temporarily stored Parameters Value bit values in hexadecimal format TTL type voltage levels max 5V Range 315800000000 to B00111111 Example OUTP UPOR B00100100 Sets pins 5 and 7 to 5 V OUTPut UPORt STATe State This command toggles the control lines of the user ports for the AUX PORT connector This 9 pole SUB D male connector is located on the rear panel of the R amp S FSWP Parameters State ON User port is switched to OUTPut OFF User port is switched to INPut RST OFF Configuring Level Characteristics Commands useful to configure level characteristics described elsewhere e SENSe ADJust LEVel on page 121 CALCulate lt n gt MARKer lt m gt FUNCtion REFerence c ececeeeeeeeeeeeeeeeeeesaeeeaeaaaaaeaaenenenenes 96 GAL Culatesm UNIT POW E 96 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVEl E 96 DISPlay WINDow n TRACe t Y SCALe RLEVel OFFSet eese 96 SENSe 3POWer NCORTection 2 2 2 2 2 I rarezces tese eei se cera o 97 Configuring UO Analyzer Measurements CALCulate lt n gt MARKer lt m gt FUNCtion REFerence This command matches the reference level to the power level of a marker If you use the command in combination with a del
125. o used to scale power diagrams the reference level is then used as the maximum on the y axis Since the hardware of the R amp S FSWP is adapted according to this value it is recom mended that you set the reference level close above the expected maximum signal level to ensure an optimum measurement no compression good signal to noise ratio Remote command DISPlay WINDowcn TRACe t Y SCALe RLEVel on page 96 Shifting the Display Offset Reference Level Defines an arithmetic level offset This offset is added to the measured level In some result displays the scaling of the y axis is changed accordingly Define an offset if the signal is attenuated or amplified before it is fed into the R amp S FSWP so the application shows correct power results All displayed power level results will be shifted by this value The setting range is 200 dB in 0 01 dB steps Note however that the internal reference level used to adjust the hardware settings to the expected signal optimally ignores any Reference Level Offset Thus it is impor tant to keep in mind the actual power level the R amp S FSWP must handle and not to rely on the displayed reference level internal reference level displayed reference level offset Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel OFFSet on page 96 Unit Reference Level The R amp S FSWP measures the signal voltage at the RF input In the default sta
126. ommand queries the control lines of the user ports For details see OUTPut UPORt VALue on page 95 Return values lt Value gt bit values in hexadecimal format TTL type voltage levels max 5V Range 315800000000 to B00111111 Example INP UPOR Result 4B00100100 Pins 5 and 7 are active Usage Query only INPut UPORt STATe State This command toggles the control lines of the user ports for the AUX PORT connector This 9 pole SUB D male connector is located on the rear panel of the R amp S FSWP See the R amp S FSWP Getting Started manual for details Parameters State ON 1 User port is switched to INPut OFF 0 User port is switched to OUTPut RST 1 Configuring Outputs DIACNOSUE SERVICO NSOGO EE 94 CUTPUEUPORIVAL EE 95 eng ele Bien LN KE 95 DIAGnostic SERVice NSOurce State This command turns the 28 V supply of the BNC connector labeled NOISE SOURCE CONTROL on the R amp S FSWP on and off For details see chapter 4 2 3 Input from Noise Sources on page 23 Parameters State ON OFF RST OFF Example DIAG SERV NSO ON 8 6 3 Configuring UO Analyzer Measurements Manual operation See Noise Source on page 39 OUTPut UPORt VALue Value This command sets the control lines of the user ports The assignment of the pin numbers to the bits is as follows Bit 7 6 5 4 3 2 1 0 Pin N A N A 5 3 4 7 6 2 Bits 7 and 6 are not assigned t
127. ormatVersion 2 is used Name Optional describes the device or application that created the file Comment Optional contains text that further describes the contents of the file DateTime Contains the date and time of the creation of the file Its type is xs dateTime see RsIqTar xsd Samples Contains the number of samples of the UO data For multi channel signals all chan nels have the same number of samples One sample can be e A complex number represented as a pair of and Q values Acomplex number represented as a pair of magnitude and phase values e Areal number represented as a single real value See also Format element Clock Contains the clock frequency in Hz i e the sample rate of the I Q data A signal gen erator typically outputs the UO data at a rate that equals the clock frequency If the UO data was captured with a signal analyzer the signal analyzer used the clock fre quency as the sample rate The attribute unit must be set to Hz Format Specifies how the binary data is saved in the UO data binary file see DataFilename element Every sample must be in the same format The format can be one of the following e complex Complex number in cartesian format i e and Q values interleaved and Q are unitless e real Real number unitless polar Complex number in polar format i e magnitude unitless and phase rad values interleaved Requires DataType float32 or f1oat64 Q Da
128. orting and Exporting UO Data Alternatively to capturing UO data by the UO Analyzer itself stored UO data from previ ous measurements or other applications can be imported to the UO Analyzer Further more l Q data processed in the UO Analyzer can be stored to a file for further evalua tion in other applications For details on importing and exporting l Q data see chapter 4 3 I Q Data Import and Export on page 24 mss Rate Keng M e Ce 128 MMEMon STObRe cnz JO COMMent hehehe enne nn nunn nenene 128 MMEMorn S Ree STAT aeta eco ince et eile eda epe ett ne ada alos 129 MMEMory LOAD IQ STATe 1 lt FileName gt This command restores UO data from a file The file extension is iq tar Parameters lt FileName gt String containing the path and name of the source file Example MMEM LOAD IQ STAT 1 C R_S Instr user data ig tar Loads IQ data from the specified file Usage Setting only Manual operation See Q Import on page 36 MMEMory STORe lt n gt 1Q COMMent lt Comment gt This command adds a comment to a file that contains UO data The suffix lt n gt is irrelevant 8 9 Querying the Status Registers Parameters Comment String containing the comment Example MMEM STOR IQ COMM Device test 1b Creates a description for the export file MMEM STOR IQ STAT 1 C R_S Instr user data ig tar Stores UO data and the comment to the specified file Manual operation See UO Export on p
129. os are appended to the captured data Averaging Several overlapping FFTs are calculated for each record the results are combined to determine the final FFT result for the record The number of FFTs to be averaged is determined by the Window Over lap and the Window Length Remote command SENSe IQ FFT ALGorithm on page 113 FFT Length Advanced FFT mode Basic settings Defines the number of frequency points determined by each FFT calculation The more points are used the higher the resolution in the spectrum becomes but the longer the calculation takes In advanced FFT mode the number of measurement points is set to the FFT length automatically Note If you use the arrow keys or the rotary knob to change the FFT length the value is incremented or decremented by powers of 2 If you enter the value manually any integer value from 3 to 524288 is available Remote command SENSe IQ FFT LENGth on page 113 Window Function Advanced FFT mode Basic settings In the UO analyzer you can select one of several FFT window types The following window types are available e Blackman Harris Flattop Gauss Rectangular 5 Term Remote command SENSe IQ FFT WINDow TYPE on page 114 Window Overlap Advanced FFT mode Basic settings Defines the part of a single FFT window that is re calculated by the next FFT calcula tion when using multiple FFT windows Remote command SENSe IQ FFT WINDow OVERl
130. ot be set for the defined RF attenuation the refer ence level is adjusted accordingly and the warning Limit reached is displayed NOTICE Risk of hardware damage due to high power levels When decreasing the attenuation manually ensure that the power level does not exceed the maximum level allowed at the RF input as an overload may lead to hardware damage Remote command INPut ATTenuation on page 97 INPut ATTenuation AUTO on page 98 Preamplifier If the optional Preamplifier hardware is installed a preamplifier can be activated for the RF input signal You can use a preamplifier to analyze signals from DUTs with low input power For R amp S FSWP26 or higher models the input signal is amplified by 30 dB if the pream plifier is activated For R amp S FSWPS the following settings are available Off Deactivates the preamplifier 15 dB The RF input signal is amplified by about 15 dB Configuring the Amplitude 30 dB The RF input signal is amplified by about 30 dB Remote command INPut GAIN STATe on page 98 INPut GAIN VALue on page 98 Noise cancellation The results can be corrected by the instrument s inherent noise which increases the dynamic range In this case a reference measurement of the instrument s inherent noise is carried out The measured noise power is then subtracted from the power in the channel that is being analyzed first active trace only The inherent noise of the instrument depend
131. ource Switches the supply voltage for an external noise source on or off External noise sources are useful when you are measuring power levels that fall below the noise floor of the R amp S FSWP itself for example when measuring the noise level of a DUT For details see chapter 4 2 3 Input from Noise Sources on page 23 Remote command DIAGnostic SERVice NSOurce on page 94 Trigger 1 2 Access Overview Trigger Trigger In Out Defines the usage of the variable TRIGGER INPUT OUTPUT connectors where Trigger 1 TRIGGER INPUT OUTPUT connector on the front panel Trigger 2 TRIGGER INPUT OUTPUT connector on the front panel Note Providing trigger signals as output is described in detail in the R amp S FSWP User Manual Input The signal at the connector is used as an external trigger source by the R amp S FSWP Trigger input parameters are available in the Trig ger dialog box Output The R amp S FSWP sends a trigger signal to the output connector to be used by connected devices Further trigger parameters are available for the connector Remote command OUTPut TRIGger lt port gt LEVel on page 108 OUTPut TRIGger lt port gt DIRection on page 107 Output Type Trigger 1 2 Type of signal to be sent to the output Device Trig Default Sends a trigger when the R amp S FSWP triggers gered Trigger Sends a high level trigger when the R amp S FSWP is in Ready for trig Armed ger state T
132. out optional interfaces with their corresponding remote control command How to Work with UO Data The basic procedure to perform an UO Analyzer measurement or capture data via the R amp S Digital Baseband Interface with step by step instructions Optimizing and Troubleshooting the Measurement Hints and tips on how to handle errors and optimize the test setup Remote Commands to perform Measurements with UO Data Remote commands required to configure and perform UO Analyzer measurements or process digital I Q data in a remote environment sorted by tasks Commands required to set up the environment or to perform common tasks on the instrument are provided in the main R amp S FSWP User Manual Programming examples demonstrate the use of many commands and can usually be executed directly for test purposes Annex Reference material e g UO file formats and a detailed description of the LVDS connector List of remote commands Alphahabetical list of all remote commands described in the manual Index User Manual 1177 5856 02 02 5 Documentation Overview 1 2 Documentation Overview The user documentation for the R amp S FSWP consists of the following parts e Printed Getting Started manual e Online Help system on the instrument e Documentation DVD with Getting Started User Manuals for base unit and firmware applications Service Manual Release Notes Data sheet and product brochures Online Help The Onl
133. ow n TRACe t Y SCALe MODE eere eeeee eene aara aaa 99 DISPlay WINDow n TRACe st Y SCALe RLEVel eese enne nnne nennen rennen DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel OFFSet D DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RPOS tiON ooocncniconinccnononocncnococonccancccnn conan oran no nan c cnn nana na nn cono FORMatDEXPOrt DSEP e EE FORMADA EE INI NEI Ee EE 7T INimiates n gt EHNEN EE INITiate lt n gt SEQUENCEPABORE E INITiate n SEQuencer IMMediate INITiatesns SEQuencerMOPBE ierant ea cade INITiatesa SEQuencer REFResh ALL tn rnt rn terere e trt ni tees 79 INITiate n EIMMediate 6 rere aaa 78 MIN FUT ew RE IUE TEE 97 INPULAT Tenuation AU TO tcrtia Dre o ca etg eeu Bog eu d detener Pues 98 INPuttATTenuation iPROTection E ER INPut COUPling INPutFIETer HPASS STATS uc tte t A t teta re Gr de un P pu p t p D en 92 INPut EIE Ter YIGESTATe uiti t o tec deca Ert Mardin imer EE Fe bv E RU pa deco ge ao 93 INPUEGAIN BeuPE s 98 INPUtGAIN VALUe ioter eet eet cte eee ecce ttt docet a a go eec tv da dae ee 98 INPULIMPGdan GO iiss E H 93 PP 93 INPULEWPORESTAT Ci E 94 INPutt le 94 INSTrament CREate DUPEicale rettet tir
134. page 104 5 7 5 7 1 Data Acquisition and Bandwidth Settings Drop Out Time Defines the time the input signal must stay below the trigger level before triggering again Remote command TRIGger SEQuence DTIMe on page 103 Trigger Holdoff Defines the minimum time in seconds that must pass between two trigger events Trigger events that occur during the holdoff time are ignored Remote command TRIGger SEQuence IFPower HOLDoff on page 103 Slope For all trigger sources except time you can define whether triggering occurs when the signal rises to the trigger level or falls down to it Remote command TRIGger SEQuence SLOPe on page 105 Data Acquisition and Bandwidth Settings How data is to be acquired is configured in the Bandwidth dialog box EE UE DEE 50 LEES EID Ss son di AA tales 55 Data Acquisition The data acquisition settings define which parts of the input signal are captured for fur ther evaluation in the applications They are configured in the Data Acquisition tab of the Bandwidth dialog box gt To display this dialog box do one of the following e Select the Bandwidth button in the configuration Overview e Select the BW key and then the Data Acquisition softkey e Select the Data Acquisition softkey in the I Q Analyzer menu Data Acquisition and Bandwidth Settings na Spectrum gt TD SCDMA BTS IQ Analyzer 1 Data Acquisition Sweep Data Acquisition Advanced Fou
135. plies the basic unit e g Hz in case of frequencies The number of dig its after the decimal point depends on the type of numeric value Example Setting SENSe FREQuency CENTer 1GHZ Query SENSe FREQuency CENTer would return 1E9 In some cases numeric values may be returned as text e INF NINF Infinity or negative infinity Represents the numeric values 9 9E37 or 9 9E37 e NAN 8 1 6 2 8 1 6 3 8 1 6 4 8 1 6 5 Introduction Not a number Represents the numeric value 9 91E37 NAN is returned in case of errors Boolean Boolean parameters represent two states The ON state logically true is represen ted by ON or a numeric value 1 The OFF state logically untrue is represented by OFF or the numeric value 0 Querying boolean parameters When you query boolean parameters the system returns either the value 1 ON or the value 0 OFF Example Setting DISPlay WINDow ZOOM STATe ON Query DISPlay WINDow ZOOM STATe would return 1 Character Data Character data follows the syntactic rules of keywords You can enter text using a short or a long form For more information see chapter 8 1 2 Long and Short Form on page 66 Querying text parameters When you query text parameters the system returns its short form Example Setting SENSe BANDwidth RESolution TYPE NORMal Query SENSe BANDwidth RESolution TYPE would return NORM Charact
136. ppended to the captured data AVERage Several overlapping FFTs are calculated for each record the results are averaged to determine the final FFT result for the record The user defined window length and window overlap are used see SENSe 10 FFT WINDow LENGth and SENSe IQ FFT WINDOow OVERlap RST AVER Example IQ FFT ALG SING Usage SCPI confirmed Manual operation See Transformation Algorithm on page 53 SENSe IQ FFT LENGth lt NoOfBins gt Defines the number of frequency points determined by each FFT calculation The more points are used the higher the resolution in the spectrum becomes but the longer the calculation takes Parameters lt NoOfBins gt integer value Range 3 to 524288 RST 4096 Example TIO FFT LENG 2048 Usage SCPI confirmed Manual operation See FFT Length on page 54 SENSe IQ FFT WINDow LENGth lt NoOfFFT gt Defines the number of samples to be included in a single FFT window when multiple FFT windows are used Parameters lt NoOfFFT gt integer value Range 3 to 1001 RST 1001 Example IQ FFT WIND LENG 500 Configuring UO Analyzer Measurements Usage SCPI confirmed Manual operation See Window Length on page 54 SENSe IQ FFT WINDow OVERIap Rate Defines the part of a single FFT window that is re calculated by the next FFT calcula tion Parameters Rate double value Percentage rate Range 0 to 1 RST 0 75 Example IQ FFT WIND OVER 0 5 Hal
137. pplication channel in MSRA mode R amp S FSWP B1 Basics on UO Data Acquisition and Processing Analysis line A frequent question when analyzing multi standard signals is how each data channel is correlated in time to others Thus an analysis line has been introduced The analysis line is a common time marker for all MSRA applications It can be positioned in any MSRA application or the MSRA Master and is then adjusted in all other applications Thus you can easily analyze the results at a specific time in the measurement in all applications and determine correlations If the marked point in time is contained in the analysis interval of the application the line is indicated in all time based result displays such as time symbol slot or bit dia grams By default the analysis line is displayed however it can be hidden from view manually In all result displays the AL label in the window title bar indicates whether or not the analysis line lies within the analysis interval or not orange AL the line lies within the interval white AL the line lies within the interval but is not displayed hidden e no AL the line lies outside the interval 1 Magnitude Analysis Interval CF 994 9 MHz For details on the MSRA operating mode see the R amp S FSWP MSRA User Manual User Manual 1177 5856 02 02 32 Configuration Overview 9 Configuration The I Q Analyzer is a special application on the R amp S FSWP which you
138. ption for UO Data Files eeseeeeess 133 A 3 I Q Data File Format iq tar eeeeeeeeeeeeeeeeeeenenen nennen nennen nnne nnns 135 List of Remote Commands UO Analyzer 141 144 R amp S9 FSWP B1 Preface 1 Preface 1 1 About this Manual This R amp S FSWP UO Analyzer User Manual provides all the information specific to the application and processing digital UO data All general instrument functions and set tings common to all applications are described in the main R amp S FSWP User Manual The main focus in this manual is on the measurement results and the tasks required to obtain them The following topics are included Welcome to the UO Analyzer application Introduction to and getting familiar with the application Typical Applications for the UO Analyzer and optional input interfaces Example measurement scenarios for UO data import and analysis Measurements and Result Displays Details on supported measurements and their result types Basics on UO Data Acquisition Background information on basic terms and principles in the context of the I Q Ana lyzer application as well as processing digital UO data in general Configuration and Analysis A concise description of all functions and settings available to import capture and analyze UO data in the I Q Analyzer with or with
139. ptured signal can be displayed using various evaluation methods All evaluation methods available for the current application are displayed in the evaluation bar in SmartGrid mode when you do one of the following e Select the EJ SmartGrid icon from the toolbar Select the Display Config button in the Overview e Select the Display Config softkey in the main application menu For a description of the available evaluation methods see chapter 3 Measurement and Result Displays on page 13 Adjusting Settings Automatically Some settings can be adjusted by the R amp S FSWP automatically according to the cur rent measurement settings In order to do so a measurement is performed The dura tion of this measurement can be defined automatically or manually To activate the automatic adjustment of a setting select the corresponding function in the AUTO SET menu or in the configuration dialog box for the setting where available MSRA operating mode In MSRA operating mode settings related to data acquisition can only be adjusted automatically for the MSRA Master not the applications Adjusting Settings Automatically When you select an auto adjust function a measurement is performed to determine the optimal settings If you select an auto adjust function for a triggered measurement you are asked how the R amp S FSWP should behave e default The measurement for adjustment waits for the next trigger o Adjusting settings
140. put sources and provide various types of output such as video or trigger signals Jule cac eost eni d ted Pac ted vedi xus c edd de VERS 36 e ONUS ere rer eere id 38 Inputs The input sources supported by the I Q Analyzer are similar to those in the Spectrum application For a comprehensive description on how to configure power sensors and external generators please refer to the documentation of the Spectrum application Configuring Data Inputs and Outputs To configure input sources Input sources can be configured via the Input dialog box To display the Input dialog box do one of the following 1 Select Input from the Overview dialog box 2 Press the INPUT OUTPUT key and then the Input Source Config softkey The remote commands required to configure inputs are described in chapter 8 6 3 Configuring Level Characteristics on page 95 chapter 8 6 4 Configuring the Attenuator on page 97 and chapter 8 6 5 Configuring the Preamplifier on page 98 Radio Frequency State ere prete ua RA YR M e xxx MU EIER 37 Jul ee PS 37 IMPCOANCE e 37 Moh Fass Filter E E 38 MIG PRESCIGCIOh WE 38 Radio Frequency State Activates input from the RF INPUT connector Remote command INPut SELect on page 93 Input Coupling The RF input of the R amp S FSWP can be coupled by alternating current AC or direct current DC AC coupling blocks any DC
141. r sse nnne 120 SENSe JABDJust CONFIQure TR G uiri ce hurt oriri tre nnn n bkn pta etn ones classes 120 SENSeTADJUuSEPREQGNBGFIG E 120 Si Er EE 121 SENSe ADJust ALL This command initiates a measurement to determine and set the ideal settings for the current task automatically only once for the current measurement This includes Reference level Example ADJ ALL Usage Event Manual operation See Adjusting all Determinable Settings Automatically Auto All on page 58 Configuring UO Analyzer Measurements SENSe ADJust CONFigure DURation Duration In order to determine the ideal reference level the R amp S FSWP performs a measure ment on the current input data This command defines the length of the measurement if SENSe ADJust CONFigure DURation MODE is set to MANual Parameters Duration Numeric value in seconds Range 0 001 to 16000 0 RST 0 001 Default unit s Example ADJ CONF DUR MODE MAN Selects manual definition of the measurement length ADJ CONF LEV DUR 5ms Length of the measurement is 5 ms Manual operation See Changing the Automatic Measurement Time Meastime Manual on page 59 SENSe ADJust CONFigure DURation MODE Mode In order to determine the ideal reference level the R amp S FSWP performs a measure ment on the current input data This command selects the way the R amp S FSWP d
142. r Measurements TRIGger SEQuence LEVel IFPower lt TriggerLevel gt This command defines the power level at the third intermediate frequency that must be exceeded to cause a trigger event Note that any RF attenuation or preamplification is considered when the trigger level is analyzed If defined a reference level offset is also considered Parameters lt TriggerLevel gt For details on available trigger levels and trigger bandwidths see the data sheet RST 10 dBm Example TRIG LEV IFP 30DBM Manual operation See Trigger Level on page 49 TRIGger SEQuence LEVel IQPower lt TriggerLevel gt This command defines the magnitude the I Q data must exceed to cause a trigger event Note that any RF attenuation or preamplification is considered when the trigger level is analyzed Parameters lt TriggerLevel gt Range 130 dBm to 30 dBm RST 20 dBm Example TRIG LEV IQP 30DBM Manual operation See Trigger Level on page 49 TRIGger SEQuence LEVel RFPower lt TriggerLevel gt This command defines the power level the RF input must exceed to cause a trigger event Note that any RF attenuation or preamplification is considered when the trigger level is analyzed If defined a reference level offset is also considered The input signal must be between 500 MHz and 8 GHz Parameters lt TriggerLevel gt For details on available trigger levels and trigger bandwidths see the data sheet RST 20 dBm Ex
143. re then evaluated by the applications Therefore in this case the number of sweep points does not define the amount of data to be acquired but rather the number of trace points that are evaluated and displayed in the result dia grams Note As opposed to previous versions of the UO Analyzer the sweep settings are now window specific For some result displays the sweep points may not be editable as they are determined automatically or restrictions may apply For the I Q vector result display the number of UO samples to record Record Length must be identical to the number of trace points to be displayed Sweep Points Thus the sweep points are not editable for this result display If the Record Length is edited the sweep points are adapted automatically For record lengths out side the valid range of sweep points i e less than 101 points or more than 32001 points the diagram does not show valid results R amp S FSWP B1 Configuration E Using fewer than 4096 sweep points with a detector other than Auto Peak may lead to wrong level results For details see Combining results trace detector on page 27 Remote command SENSe SWEep POINts on page 81 Sweep Average Count Defines the number of measurements to be performed in the single sweep mode Val ues from 0 to 200000 are allowed If the values O or 1 are set one measurement is performed The sweep count is applied to all the traces in all diagrams If
144. results like trace data or markers are only valid after a single measurement end synchronization For details on synchronization see the Remote Basics chapter in the R amp S FSWP User Manual If the measurement mode is changed for a measurement channel while the Sequencer is active the mode is only considered the next time the measurement in that channel is activated by the Sequencer Suffix lt n gt irrelevant Parameters lt State gt ON OFF 0 1 ON 1 Continuous measurement OFF 0 Single measurement RST 1 Performing Measurements Example INIT CONT OFF Switches the measurement mode to single measurement INIT CONT ON Switches the measurement mode to continuous measurement Manual operation See Continuous Sweep RUN CONT on page 56 INITiate lt n gt IMMediate This command starts a single new measurement You can synchronize to the end of the measurement with OPC OPC or WAI Suffix lt n gt irrelevant Usage Event Manual operation See Single Sweep RUN SINGLE on page 56 INITiate lt n gt SEQuencer ABORt This command stops the currently active sequence of measurements The Sequencer itself is not deactivated so you can start a new sequence immediately using INITiate lt n gt SEQuencer IMMediate on page 78 To deactivate the Sequencer use SYSTem SEQuencer on page 82 Suffix n irrelevant Usage Event INITiate lt n gt SEQuencer IMMediate This command starts a new seque
145. returned as the result of a query are indicated as Return values e Conformity Commands that are taken from the SCPI standard are indicated as SCPI con firmed All commands used by the R amp S FSWP follow the SCPI syntax rules e Asynchronous commands A command which does not automatically finish executing before the next com mand starts executing overlapping command is indicated as an Asynchronous command Reset values RST Default parameter values that are used directly after resetting the instrument RST command are indicated as RST values if available Default unit This is the unit used for numeric values if no other unit is provided with the parame ter e Manual operation If the result of a remote command can also be achieved in manual operation a link to the description is inserted Long and Short Form The keywords have a long and a short form You can use either the long or the short form but no other abbreviations of the keywords The short form is emphasized in upper case letters Note however that this emphasis only serves the purpose to distinguish the short from the long form in the manual For the instrument the case does not matter Example SENSe FREQuency CENTer is the same as SENS FREQ CENT Numeric Suffixes Some keywords have a numeric suffix if the command can be applied to multiple instances of an object In that case the suffix selects a particular instance
146. rier Transformation Params Sample Rate Transformation Analysis Bandwidth Algorithm Averaging ABW FFT Length 4096 Maximum Bandwidth AAN Flattop amplitude acc Window Overlap 0 75 Meas Time Window Length 4096 Record Length S SES Visualization Swap I Q Frequency Resolution RBW Fig 5 1 Data acquisition settings with advanced FFT parameters MSRA operating mode In MSRA operating mode only the MSRA Master channel actually captures data from the input signal The data acquisition settings for the UO Analyzer application in MSRA mode define the analysis interval For details on the MSRA operating mode see the R amp S FSWP MSRA User Manual The remote commands required to perform these tasks are described in chap ter 8 6 11 Configuring Data Acquisition on page 111 Sample Rat E 51 Analysis Bandaidth AAA 52 MEAS Ba T 52 Record Lengt E 52 ple M M 52 EAE A 53 Advanced FFT mode Basic settings niente rai as 53 L Transformation Alo seelenen Neel 53 A Mc as RD 54 BEI o da ii eo ENDE PE T cdc aE REE 54 L Window Overlap eene tete tenent 54 A A 54 Sample Rate Defines the UO data sample rate of the R amp S FSWP This value is dependent on the defined Analysis Bandwidth and the defined signal source
147. rigger source is considered Data acquisition is started manually or automatically and continues until stopped explicitely In its default state the R amp S FSWP performs free run measurements Remote command TRIG SOUR IMM see TRIGger SEQuence SOURce on page 106 Ext Trigger 1 2 Trigger Source Data acquisition starts when the TTL signal fed into the specified input connector meets or exceeds the specified trigger level Note The External Trigger 1 softkey automatically selects the trigger signal from the TRIGGER 1 INPUT OUTPUT connector on the front panel In the UO Analyzer application only External Trigger 1 is supported For details see the Instrument Tour chapter in the R amp S FSWP Getting Started man ual External Trigger 1 Trigger signal from the TRIGGER 1 INPUT OUTPUT connector front panel External Trigger 2 Trigger signal from the TRIGGER 2 INPUT OUTPUT connector rear panel Note Connector must be configured for Input in the Outputs con figuration see Trigger 1 2 on page 39 Remote command TRIG SOUR EXT TRIG SOUR EXT2 See TRIGger SEQuence SOURce on page 106 IF Power Trigger Source The R amp S FSWP starts capturing data as soon as the trigger level is exceeded around the third intermediate frequency For frequency sweeps the third IF represents the start frequency The trigger band width at the third IF depends on the RBW and sweep type Configuring
148. s command can be used for any trigger source not just IF Power despite the legacy keyword Note If you perform gated measurements in combination with the IF Power trigger the R amp S FSWP ignores the holding time for frequency sweep FFT sweep zero span and UO data measurements Parameters Period Range Os to 10s RST 0s Example TRIG SOUR EXT Sets an external trigger source TRIG IFP HOLD 200 ns Sets the holding time to 200 ns Manual operation See Trigger Holdoff on page 50 TRIGger SEQuence IFPower HYSTeresis lt Hysteresis gt This command defines the trigger hysteresis which is only available for IF Power trig ger sources Parameters lt Hysteresis gt Range 3 dB to 50 dB RST 3 dB Example TRIG SOUR IFP Sets the IF power trigger source TRIG IFP HYST 10DB Sets the hysteresis limit value Manual operation See Hysteresis on page 49 TRIGger SEQuence LEVel EXTernal lt port gt lt TriggerLevel gt This command defines the level the external signal must exceed to cause a trigger event In the UO Analyzer application only EXTernall is supported Suffix port Selects the trigger port 1 trigger port 1 TRIGGER INPUT connector on front panel 2 trigger port 2 TRIGGER INPUT OUTPUT connector on rear panel Parameters lt TriggerLevel gt Range 0 5V to 3 5 V RST 1 4 V Example TRIG LEV 2V Manual operation See Trigger Level on page 49 Configuring UO Analyze
149. s of the channel s sweep mode in the same order until the Sequencer is stopped CDEFined First a single sequence is performed Then only those channels in continuous sweep mode INIT CONT ON are repeated RST CONTinuous Example SYST SEQ ON Activates the Sequencer INIT SEQ MODE SING Sets single sequence mode so each active measurement will be performed once INIT SEQ IMM Starts the sequential measurements INITiate lt n gt SEQuencer REFResh ALL This function is only available if the Sequencer is deactivated SYSTem SEQuencer SYST SEQ OFF and only in MSRA mode The data in the capture buffer is re evaluated by all active MSRA applications The suffix lt n gt is irrelevant Performing Measurements Example SYST SEQ OFF Deactivates the scheduler INIT CONT OFF Switches to single sweep mode INIT WAI Starts a new data measurement and waits for the end of the Sweep INIT SEQ REFR Refreshes the display for all channels Usage Event SENSe AVERage COUNt lt AverageCount gt TRACe IQ AVERage COUNt lt NumberSets gt This command defines the number of UO data sets that the averaging is based on Parameters lt NumberSets gt Range 0 to 32767 RST 0 Example TRAC IQ ON Switches on acquisition of UO data TRAC IQ AVER ON Enables averaging of the UO measurement data TRAC IQ AVER COUN 10 Selects averaging over 10 data sets TRAC IQ DATA Starts the measurement and
150. s on the selected center frequency resolu tion bandwidth and level setting Therefore the correction function is disabled when ever one of these parameters is changed A disable message is displayed on the screen To enable the correction function after changing one of these settings activate it again A new reference measurement is carried out Noise cancellation is also available in zero span Currently noise cancellation is only available for the following trace detectors e RMS e Average e Sample e Positive Peak Remote command SENSe POWer NCORrection on page 97 5 4 2 Scaling the Level Axis To configure the y axis scaling settings Vertical Axis settings can be configured via the AMPT key or in the Amplitude dialog box gt To display the Amplitude dialog box do one of the following e Select Amplitude from the Overview e Selectthe AMPT key and then the Scale Config softkey The remote commands required to scale the y axis are described in chapter 8 6 6 Scaling the Y Axis on page 99 acu T 43 Ref bevel EEN deierst eege Sedan 44 e e EE 44 br CS IIS SETTE TI TTD DOTEM 44 Range Defines the displayed y axis range in dB 5 5 Configuring Frequency Characteristics The default value is 100 dB Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe on page 99 Ref Level Position Defines the reference level position i e the
151. sing the frequency resolution Various different window functions are provided in the R amp S FSWP to suit different input signals Each of the window functions has specific characteristics including some advantages and some trade offs These characteristics need to be considered carefully to find the optimum solution for the measurement task d Ignoring the window function rectangular window The regtangular window function is in effect not a function at all it maintains the origi nal sampled data This may be useful to minimize the required bandwidth however be aware that if the window does not contain exactly one period of your signal heavy sidelobes may occur which do not exist in the original signal 4 4 2 Table 4 3 Characteristics of typical FFT window functions Window type Frequency Magnitude Sidelobe sup Measurement recommendation resolution resolution pression Rectangular Best Worst Worst No function applied Separation of two tones with almost equal amplitudes and a small fre quency distance Blackman Harris Good Good Good Harmonic detection and spurious default emission detection Gauss Alpha Good Good Good Weak signals and short duration 0 4 Flattop Worst Best Good Accurate single tone measurements 5 Term Good Good Best Measurements with very high dynamic range Overlapping The I Q Analyzer calculates multiple FFTs per measurement by dividing one cap
152. sition remote UO Analyzer remote A Continue single sweep orci 57 Continuous sweep ioci 56 Conventions SGPlicommands rrr hme miren 65 Copying Measurement channel remote sss 71 Coupling Input Mot luisana 92 CP ACLR Noise cancellation ottiene 43 D Data acquisition Configuring remote seeeeeeees 111 1 Q Analyzer 1 Q data remote MSRA noice 291 iurc oa 50 Data format iol mA tna 133 SE RN 133 lance 86 Decimation BEE A T AEE 18 Demodulation DiS Play E bf Diagram area Hardware Settings oos cre reete tre ra eet epe Ree 11 Diagram footer Informatioh euo ern ces rris 12 Display configuration cr 57 Drop out time jig 50 Duplicating Measurement channel remote s 71 E Edge Triggered gate Electronic input attenuation Equalizer Data lge tee EE 18 Errors gne 41 Evaluation methods REMO rca iii 122 Exporting VQ data 24 33 36 62 135 139 inc 36 External trigger we AT Level remote cunas sienes 104 E FFT F undatmnentals ic Een eO recette 26 Measurement Speed ssiri 29 Window nee 26 54 Files Format UO data 1 Q data binary XML 1 Q data input
153. sn ESTATeste catu tratto exei retenu droits 80 TRACelO AVERaoel STATE eee aiani arpiada nsns str aaa iaai 80 SENSe SWEep COUNL eececett ttt tenente tte tette tette te tette t tests rnas 81 SENSe SWEep COUNEGCURRUern E cente aeree trente p nien ne PE RR ERR EEE REL AGREES 81 E Ee el EN SENSe SWEep TIME tette ar 82 SY STemiSEQue nce M 82 ABORt This command aborts the measurement in the current measurement channel and resets the trigger system To prevent overlapping execution of the subsequent command before the measure ment has been aborted successfully use the OPC or WAI command after ABOR and before the next command For details see the Remote Basics chapter in the R amp S FSWP User Manual To abort a sequence of measurements by the Sequencer use the INITiate lt n gt SEQuencer ABORt command Note on blocked remote control programs If a sequential command cannot be completed for example because a triggered sweep never receives a trigger the remote control program will never finish and the remote channel to the R amp S FSWP is blocked for further commands In this case you must interrupt processing on the remote channel first in order to abort the measurement To do so send a Device Clear command from the control instrument to the R amp S FSWP on a parallel channel to clear all currently active remote channels Depending on the used interfac
154. sults TRACe lt n gt DATA on page 87 Spectrum Displays the frequency spectrum of the captured UO samples MultiView SS IQ Analyzer Ref Level 30 00 dBm Meas Time 10 24 ms SRate 32 0 MHz Att OdB Freq 4 0GHz RecLength 327680 RBW 30 0 kHz TRG 1 1 Spectrum 4096 pts 3 2 MHz Span 32 0 MHz Remote command LAY ADD WIND 1 RIGH FREQ See LAYout ADD WINDow on page 122 Results TRACe lt n gt DATA on page 87 E User Manual 1177 5856 02 02 14 R amp S9FSWP B1 Measurement and Result Displays pe PY H Hae Sm Q Vector Displays the captured samples in an l Q plot The samples are connected by a line MultiView Spectrum Spectrum 2 IQ Analyzer Ref Level 223 61 mv AQT 31 3ps SRate 32 0 MHz Att 10dB Freq 30 0MHz RecLength 1001 TRG IFP PIO Vector Lu eg Note For the l Q vector result display the number of I Q samples to record Record Length must be identical to the number of trace points to be displayed Measure ment Points for UO Analyzer 1001 For record lengths outside the valid range of Sweep points the diagram does not show valid results Remote command LAY ADD WIND 1 RIGH VECT see LAYout ADD WINDow on page 122 Results TRACe lt n gt DATA on page 87 Real Imag UO Displays the and Q values in separate diagrams User Manual 1177 5856 02 02 15 R amp S9FS
155. t The R amp S FSWP adjusts the scaling of the y axis accordingly For measurements with the optional external generator control the command defines the position of the reference value Parameters Position O PCT corresponds to the lower display border 100 corre sponds to the upper display border RST 100 PCT frequency display 50 PCT time dis play Example DISP TRAC Y RPOS 50PCT Usage SCPI confirmed Manual operation See Ref Level Position on page 44 DISPlay WINDow lt n gt TRACe lt t gt Y SPACing lt ScalingType gt This command selects the scaling of the y axis for all traces lt t gt is irrelevant Parameters lt ScalingType gt LOGarithmic Logarithmic scaling LiNear Linear scaling in LDB Linear scaling in the specified unit PERCent Linear scaling in RST LOGarithmic Example DISP TRAC Y SPAC LIN Selects linear scaling in 96 Usage SCPI confirmed Manual operation See Scaling on page 44 Configuring UO Analyzer Measurements 8 6 7 Configuring the Frequency CALCulate n MARKer m FUNCtion CENTer esses nennen nnne nnn 101 ISENSeTFRSEOUSDOV GENTE slc tro A tee tatc een bee adus 101 SENSe FREQusncy CENT er STEP 2 roe ec ted ate A da ee EU EA De VR YE NEEN 101 SENSe FREQuency CENTer STEP AUTO cce teens 102 SENSO FREQUENCY OFT DEL nupt code ertet th it n dried Road 102 CALCulate lt n gt MARKer lt m gt FUNCtion CENTer This command matches
156. t Usage Query only LAYout IDENtify WINDow lt WindowName gt This command queries the index of a particular display window in the active measure ment channel Note to query the name of a particular window use the LAYout WINDow lt n gt IDENtify query Configuring UO Analyzer Measurements Query parameters lt WindowName gt String containing the name of a window Return values lt WindowIndex gt Index number of the window Example LAY WIND IDEN 2 Queries the index of the result display named 2 Response 2 Usage Query only LAYout REMove WINDow lt WindowName gt This command removes a window from the display in the active measurement channel Parameters lt WindowName gt String containing the name of the window In the default state the name of the window is its index Example LAY REM 2 Removes the result display in the window named 2 Usage Event LAYout REPLace WINDow lt WindowName gt lt WindowType gt This command replaces the window type for example from Diagram to Result Sum mary of an already existing window in the active measurement channel while keeping its position index and window name To add a new window use the LAYout ADD WINDow command Parameters lt WindowName gt String containing the name of the existing window By default the name of a window is the same as its index To determine the name and index of all active windows in the
157. ta File Format iq tar Element Description DataType Specifies the binary format used for samples in the UO data binary file see DataFilename element and chapter A 3 2 I Q Data Binary File on page 139 The following data types are allowed int8 8 bit signed integer data e int16 16 bit signed integer data int32 32 bit signed integer data e f10at32 32 bit floating point data IEEE 754 e float64 64 bit floating point data IEEE 754 ScalingFactor Optional describes how the binary data can be transformed into values in the unit Volt The binary UO data itself has no unit To get an I Q sample in the unit Volt the saved samples have to be multiplied by the value of the ScalingFactor For polar data only the magnitude value has to be multiplied For multi channel signals the ScalingFactor must be applied to all channels The attribute unit must be set to v The ScalingFactor must be gt 0 If the ScalingFactor element is not defined a value of 1 V is assumed NumberOfChan Optional specifies the number of channels e g of a MIMO signal contained in the nels 1 Q data binary file For multi channels the UO samples of the channels are expected to be interleaved within the UO data file see chapter A 3 2 I Q Data Binary File on page 139 If the NumberOfChannels element is not defined one channel is assumed DataFilename Contains the filename of the UO data binary file that is part of the iq tar file
158. ta marker that delta marker is turned into a normal marker Example CALC MARK2 FUNC REF Sets the reference level to the level of marker 2 Usage Event CALCulate lt n gt UNIT POWer lt Unit gt This command selects the unit of the y axis The unit applies to all power based measurement windows regardless of the lt n gt suf fix Parameters lt Unit gt DBM V A W DBPW WATT DBUV DBMV VOLT DBUA AMPere RST dBm Example CALC UNIT POW DBM Sets the power unit to dBm Manual operation See Unit on page 41 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel lt ReferenceLevel gt This command defines the reference level for all traces lt t gt is irrelevant With a reference level offset 0 the value range of the reference level is modified by the offset Parameters lt ReferenceLevel gt The unit is variable Range see datasheet RST 0 dBm Example DISP TRAC Y RLEV 60dBm Usage SCPI confirmed Manual operation See Reference Level on page 41 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel OFFSet Offset This command defines a reference level offset for all traces lt t gt is irrelevant Parameters lt Offset gt Range 200 dB to 200 dB RST 0dB Configuring UO Analyzer Measurements Example DISP TRAC Y RLEV OFFS 10dB Manual operation See Shifting the Display Offset on page 41 SENSe POWer NCORrection State This comman
159. te the level is displayed at a power of 1 mW dBm Via the known input impedance 50 Q or 75 Q see Impedance on page 37 conversion to other units is possible The following units are available and directly convertible e dBm e dBmV Configuring the Amplitude dByV dBpA dBpw Volt Ampere Watt Remote command INPut IMPedance on page 93 CALCulate lt n gt UNIT POWer on page 96 Setting the Reference Level Automatically Auto Level Reference Level Automatically determines the optimal reference level for the current input data At the same time the internal attenuators are adjusted so the signal to noise ratio is opti mized while signal compression clipping and overload conditions are minimized To determine the optimal reference level a level measurement is performed on the R amp S FSWP You can change the measurement time for the level measurement if necessary see Changing the Automatic Measurement Time Meastime Manual on page 59 Remote command SENSe ADJust LEVel on page 121 Attenuation Mode Value The RF attenuation can be set automatically as a function of the selected reference level Auto mode This ensures that the optimum RF attenuation is always used It is the default setting In Manual mode you can set the RF attenuation in 1 dB steps down to 0 dB Other entries are rounded to the next integer value The range is specified in the data sheet If the defined reference level cann
160. ter frequency to 110 MHz Manual operation See Center Frequency Stepsize on page 45 SENSe FREQuency CENTer STEP AUTO lt State gt This command couples or decouples the center frequency step size to the span In time domain zero span measurements the center frequency is coupled to the RBW Parameters lt State gt ON OFF 0 1 RST 1 Example FREQ CENT STEP AUTO ON Activates the coupling of the step size to the span SENSe FREQuency OFFSet Offset This command defines a frequency offset If this value is not O Hz the application assumes that the input signal was frequency shifted outside the application Al results of type frequency will be corrected for this shift numerically by the application See also Frequency Offset on page 45 Note In MSRA mode the setting command is only available for the MSRA Master For MSRA applications only the query command is available Parameters Offset Range 100 GHz to 100 GHz RST 0 Hz Example FREQ OFFS 1GHZ Usage SCPI confirmed Manual operation See Frequency Offset on page 45 Configuring UO Analyzer Measurements 8 6 8 Configuring Trigger OPC should be used after requesting data This will hold off any subsequent changes to the selected trigger source until after the sweep is completed and the data is returned TRIGger SEQuence DTIMe 22 rotor oor A ada nes to ceca ei dede erede 103 TRIGE
161. th 0 8 Output sample rate Regarding the record length the following rule applies Record length Measurement time sample rate Maximum record length for RF input The maximum record length that is the maximum number of samples that can be cap tured depends on the sample rate Table 4 1 Maximum record length upsampling MSRA master 200 MHz to 600 MHz Sample rate Maximum record length 100 Hz to 200 MHz 440 MSamples precisely 461373440 440 1024 1024 samples 200 MHz to 10 GHz 220 MSamples MSRA operating mode In MSRA operating mode the MSRA Master is restricted to a sample rate of 600 MHz Processing Analog UO Data from RF Input Usable UO bandwidth MHz Option B80 RF input BW 0 80 fout Without BW option 20 40 60 80 100 120 140 10000 Output sample rate fout MHz Fig 4 2 Relationship between maximum usable I Q bandwidth and output sample rate with and with out bandwidth extensions 4 1 1 3 R amp S FSWP without additional bandwidth extension options sample rate 100 Hz 10 GHz maximum UO bandwidth 10 MHz MSRA operating mode In MSRA operating mode the MSRA Master is restricted to a sample rate of 600 MHz Table 4 2 Maximum I Q bandwidth Sample rate Maximum UO bandwidth 100 Hz to 10 MHz proportional up to maximum 10 MHz 10 MHz to 10 GHz 10 MHz MSRA master 10 MHz to 600 MHz 4
162. th the default settings It can be configured in the UO Analyzer Overview dialog box which is displayed when you select the Overview softkey from any menu see chapter 5 Configuration on page 33 Multiple Measurement Channels and Sequencer Function When you activate an application a new measurement channel is created which deter mines the measurement settings for that application The same application can be acti vated with different measurement settings by creating several channels for the same application The number of channels that can be configured at the same time depends on the avail able memory on the instrument Only one measurement can be performed at any time namely the one in the currently active channel However in order to perform the configured measurements consecu tively a Sequencer function is provided If activated the measurements configured in the currently active channels are per formed one after the other in the order of the tabs The currently active measurement is indicated by a 3 symbol in the tab label The result displays of the individual channels are updated in the tabs as well as the MultiView as the measurements are per formed Sequential operation itself is independent of the currently displayed tab For details on the Sequencer function see the R amp S FSWP User Manual 2 2 Understanding the Display Information The following figure shows a measurement diagram during UO Analyzer op
163. the trace modes Average Max Hold or Min Hold are set this value also deter mines the number of averaging or maximum search procedures In continuous sweep mode if sweep count 0 default averaging is performed over 10 measurements For sweep count 71 no averaging maxhold or minhold operations are performed Remote command SENSe SWEep COUNt on page 81 TRACe 10 AVERage COUNt on page 80 Continuous Sweep RUN CONT After triggering starts the sweep and repeats it continuously until stopped This is the default setting While the measurement is running the Continuous Sweep softkey and the RUN CONT key are highlighted The running measurement can be aborted by selecting the highlighted softkey or key again The results are not deleted until a new measurement is started Note Sequencer If the Sequencer is active the Continuous Sweep softkey only controls the sweep mode for the currently selected channel however the sweep mode only has an effect the next time the Sequencer activates that channel and only for a channel defined sequence In this case a channel in continuous sweep mode is swept repeatedly Furthermore the RUN CONT key controls the Sequencer not individual sweeps RUN CONT starts the Sequencer in continuous mode Remote command INITiate lt n gt CONTinuous on page 77 Single Sweep RUN SINGLE After triggering starts the number of sweeps set in Sweep Count The measurement stops after th
164. ts a measurement and waits for the end CALC MARK2 Y Outputs the measured value of marker 2 In UO Analyzer application for Real Imag I Q for example 1 852719887E 011 0 Usage Query only Manual operation See Marker Table on page 16 See Marker Peak List on page 16 MMEMory STORe lt n gt LIST lt FileName gt This command exports the SEM and spurious emission list evaluation to a file The file format is dat Parameters lt FileName gt String containing the path and name of the target file Example MMEM STOR LIST test Stores the current list evaluation results in the test dat file Configuring UO Analyzer Measurements Contiguring INput SOURCES EE 91 COMMON COD UNS t 94 Configuring Level Characteristics nennen 95 Configuring iNhe AS EE 97 Configuring en EE 98 Scallig Vie EE 99 Configuring the FFegueliey cionado e ai 101 COMMGUNING Ke Lee EE 103 Conf9uripg Tiger OUIDIUL EE 107 Configuring Gated Measurements sess enne 109 Configuring Data Acquis Rom cas a rote tre Eo Ad 111 Automatic ees TE e DEET 118 Configuring the Result BISBlay uo 121 Configuring Input Sources INPUEATTernuatlon PRO Tecon RESGL ctione td pta aet vt to een rn tec ae ene dean aerei coats 92 e IT ee TTT D 92 INPUFILTERAPASS S RN KEE 92 Configuring UO Analyzer Measurements zia zen die STATE e A A A cae ad a did 93 INPUEIMPCD ET 93 l
165. tured record into several windows Furthermore the I Q Analyzer allows consecutive win dows to overlap Overlapping reuses samples that were already used to calculate the preceding FFT result User Manual 1177 5856 02 02 26 R amp S9 FSWP B1 Basics on UO Data Acquisition and Processing Overlap area In advanced FFT mode with averaging the overlapping factor can be set freely The higher the overlap factor the more windows are used This leads to more individual results and improves detection of transient signal effects However it also extends the duration of the calculation The size of the window can be defined manually according to the record length the overlap factor and and the FFT length With an overlap of the FFTs of 67 for example the second data block the R amp S FSWP performs the FFT on covers the last 6796 of the data of the first FFT with only 3396 new data The third data block still covers 3396 of the first data block and 67 of the second data block and so on Fig 4 3 Overlapping FFTs In Manual or Auto FFT mode an FFT length of 4096 and a window length of 4096 or the record length if shorter is used to calculate the spectrum Combining results trace detector If the record length permits multiple overlapping windows are calculated and combined to create the final spectrum using the selected trace detector If necessary the trace detector is also used to reduce the number of calcul
166. uency automatically The optimum center frequency is the frequency with the highest S N ratio in the fre quency span As this function uses the signal counter it is intended for use with sinus oidal signals Remote command SENSe ADJust FREQuency on page 120 Adjusting Settings Automatically Setting the Reference Level Automatically Auto Level Automatically determines the optimal reference level for the current input data At the same time the internal attenuators are adjusted so the signal to noise ratio is opti mized while signal compression clipping and overload conditions are minimized To determine the optimal reference level a level measurement is performed on the R amp S FSWP You can change the measurement time for the level measurement if necessary see Changing the Automatic Measurement Time Meastime Manual on page 59 Remote command SENSe ADJust LEVel on page 121 Resetting the Automatic Measurement Time Meastime Auto Resets the measurement duration for automatic settings to the default value Remote command SENSe ADJust CONFigure DURation MODE on page 119 Changing the Automatic Measurement Time Meastime Manual This function allows you to change the measurement duration for automatic setting adjustments Enter the value in seconds Remote command SENSe ADJust CONFigure DURation MODE on page 119 SENSe ADJust CONFigure DURation on page 119 Upper Level Hysteresis Whe
167. urns the current number of started sweeps or measurements This com mand is only available if a sweep count value is defined and the instrument is in single sweep mode Example SWE COUNt 64 Sets sweep count to 64 INIT CONT OFF Switches to single sweep mode INIT Starts a sweep without waiting for the sweep end SWE COUN CURR Queries the number of started sweeps Usage Query only SENSe SWEep POINts lt SweepPoints gt This command defines the number of measurement points to analyze after a measure ment Performing Measurements Example SWE POIN 251 Usage SCPI confirmed Manual operation See Sweep Points on page 55 SENSe SWEep TIME Time This command defines the measurement time Parameters Time refer to data sheet RST depends on current settings determined automati cally Example SWE TIME 10s Usage SCPI confirmed Manual operation See Meas Time on page 52 SYSTem SEQuencer State This command turns the Sequencer on and off The Sequencer must be active before any other Sequencer commands INIT SEQ are executed otherwise an error will occur A detailed programming example is provided in the Operating Modes chapter in the R amp S FSWP User Manual Parameters lt State gt ON OFF 0 1 ON 1 The Sequencer is activated and a sequential measurement is started immediately OFF 0 The Sequencer is deactivated Any running sequential measure
168. used as a query so that you immediately obtain the name of the new window as a result Parameters Direction LEFT RIGHt ABOVe BELow lt WindowType gt Type of measurement window you want to add See LAYout ADD WINDow on page 122 for a list of availa ble window types Return values lt NewWindowName gt When adding a new window the command returns its name by default the same as its number as a result Example LAY WIND1 ADD LEFT MTAB Result 2 Adds a new window named 2 with a marker table to the left of window 1 Usage Query only LAYout WINDow lt n gt IDENtify This command queries the name of a particular display window indicated by the lt n gt suffix in the active measurement channel Note to query the index of a particular window use the LAYout IDENtifyl WINDow command Return values lt WindowName gt String containing the name of a window In the default state the name of the window is its index 8 7 Analyzing Results Example LAY WIND2 IDEN Queries the name of the result display in window 2 Response 2 Usage Query only LAYout WINDow lt n gt REMove This command removes the window specified by the suffix lt n gt from the display in the active measurement channel The result of this command is identical to the LAYout REMove WINDow command Example LAY WIND2 REM Removes the result display in window 2 Usage Event LAY out WINDow
169. values in 32 bit floating point format Multi channel data is not supported The UO data is stored in a format with the file extension iq tar For a detailed description see the R amp S FSWP UO Analyzer and UO Input User Manual The import and export functions are available in the Save Recall menu which is dis played when you select the LI Save or EI Open icon in the toolbar see chap ter 5 2 Import Export Functions on page 35 Export only in MSRA mode In MSRA mode UO data can only be exported to other applications I Q data cannot be imported to the MSRA Master or any MSRA applications 4 4 Basics on FFT The I Q Analyzer measures the power of the signal input over time In order to convert the time domain signal to a frequency spectrum an FFT Fast Fourier Transformation is performed which converts a vector of input values into a discrete spectrum of fre quencies V FFT THz R amp S9 FSWP B1 Basics on UO Data Acquisition and Processing 4 4 1 Window Functions The Fourier transformation is not performed on the entire captured data in one step Only a limited number of samples is used to calculate an individual result This process is called windowing After sampling in the time domain each window is multiplied with a specific window function Windowing helps minimize the discontinuities at the end of the measured sig nal interval and thus reduces the effect of spectral leakage increa
170. voltage from the input signal This is the default setting to prevent damage to the instrument Very low frequencies in the input signal may be dis torted However some specifications require DC coupling In this case you must protect the instrument from damaging DC input voltages manually For details refer to the data sheet Remote command INPut COUPling on page 92 Impedance For some measurements the reference impedance for the measured levels of the R amp S FSWP can be set to 50 Q or 75 O 75 Q should be selected if the 50 O input impedance is transformed to a higher impe dance using a 75 Q adapter of the RAZ type 25 Q in series to the input impedance of the instrument The correction value in this case is 1 76 dB 10 log 750 500 This value also affects the unit conversion Remote command INPut IMPedance on page 93 Configuring Data Inputs and Outputs High Pass Filter 1 3 GHz Activates an additional internal high pass filter for RF input signals from 1 GHz to 3 GHz This filter is used to remove the harmonics of the analyzer in order to measure the harmonics for a DUT for example This function requires an additional hardware option Note for RF input signals outside the specified range the high pass filter has no effect For signals with a frequency of approximately 4 GHz upwards the harmonics are suppressed sufficiently by the YIG filter Remote command INPut FILTer HPASs STATe on page 92 YIG
171. x 0 y 0 is in the lower left corner of the screen The end point x 100 y 100 is in the upper right cor ner of the screen See figure 8 1 The direction in which the splitter is moved depends on the screen layout If the windows are positioned horizontally the splitter also moves horizontally If the windows are positioned vertically the splitter also moves vertically Range 0 to 100 Example LAY SPL 1 3 50 Moves the splitter between window 1 Frequency Sweep and 3 Marker Table to the center 50 of the screen i e in the fig ure above to the left User Manual 1177 5856 02 02 125 Configuring UO Analyzer Measurements Example LAY SPL 1 4 70 Moves the splitter between window 1 Frequency Sweep and 3 Marker Peak List towards the top 70 of the screen The following commands have the exact same effect as any combination of windows above and below the splitter moves the splitter vertically AY SPL 3 2 70 AY SPL 4 1 70 AY SPL 2 1 70 LAY out WINDow lt n gt ADD lt Direction gt lt WindowType gt This command adds a measurement window to the display Note that with this com mand the suffix n determines the existing window next to which the new window is added as opposed to LAYout ADD WINDow for which the existing window is defined by a parameter To replace an existing window use the LAYout WINDow lt n gt REPLace command This command is always
172. you delete the last measurement channel the default Phase Noise channel is acti vated Parameters lt ChannelName gt Example Usage String containing the name of the channel you want to delete A measurement channel must exist in order to be able delete it INST DEL PhaseNoise Deletes the channel with the name PhaseNoise Event Activating UO Analyzer Measurements INSTrument LIST This command queries all active measurement channels This is useful in order to obtain the names of the existing measurement channels which are required in order to replace or delete the channels Return values lt ChannelType gt For each channel the command returns the channel type and lt ChannelName gt channel name see tables below Tip to change the channel name use the INSTrument REName command Example INST LIST Result for 2 measurement channels PNO PhaseNoise PNO PhaseNoise2 Usage Query only Table 8 1 Available measurement channel types and default channel names Application lt ChannelType gt Parameter Default Channel Name Phase Noise PNOISE Phase Noise Spectrum R amp S FSWP B1 SANALYZER Spectrum 1 Q Analyzer R amp S FSWP IQ IQ Analyzer B1 Analog Demodulation ADEM Analog Demod R amp S FSWP K7 Noise Figure Measure NOISE Noise ments R amp S FSWP K30 Note the default channel name is also listed in the table If the specified name for a new cha
173. yzer Measurements 2 100 H8 A The number of complex samples to be captured prior to the trigger event can be selected see TRACe 10 SET on page 115 for all available trigger sources except for Free Run TRACe IQ EGATe State This command turns gated measurements with the UO analyzer on and off Before you can use the command you have to turn on the I Q analyzer and select an external or IF power trigger source Parameters State ON OFF RST OFF Example TRAC IQ EGAT ON TRACe IQ EGATe GAP Samples This command defines the interval between several gate periods for gated measure ments with the UO analyzer Parameters Samples numeric value Max 440 MS sample rate 200MHz 1 pretrigger samples defined by TRACe TO SET sample rate defined by TRACe 10 SRATe Range 1 Max samples RST 1 Example TRAC IQ EGAT GAP 2 TRACe IQ EGATe LENGth lt GateLength gt This command defines the gate length for gated measurements with the UO analyzer Parameters lt GateLength gt lt numeric value gt Max 440 MS sample rate 200MHz 1 pretrigger samples defined by TRACe 10 SET sample rate defined by TRACe 10 SRATe Range 1 Max samples RST 100 8 6 11 Configuring UO Analyzer Measurements Example TRAC IQ EGAT LENG 2000 TRACe IQ EGATe NOFgateperiods Number This command defines t
174. yzer Measurements Example INP FILT HPAS ON Turns on the filter Usage SCPI confirmed Manual operation See High Pass Filter 1 3 GHz on page 38 INPut FILTer YIG STATe State This command turns the YIG preselector on and off Note the special conditions and restrictions for the YIG filter described in YIG Prese lector on page 38 Parameters State ON OFF 0 1 RST OFF Example INP FILT YIG OFF Deactivates the YIG preselector Manual operation See YIG Preselector on page 38 INPut IMPedance Impedance This command selects the nominal input impedance of the RF input In some applica tions only 50 O are supported 75 Q should be selected if the 50 O input impedance is transformed to a higher impe dance using a matching pad of the RAZ type 25 Q in series to the input impedance of the instrument The power loss correction value in this case is 1 76 dB 10 log 750 500 Parameters Impedance 50175 RST 500 Example INP IMP 75 Usage SCPI confirmed Manual operation See Impedance on page 37 See Unit on page 41 INPut SELect Source This command selects the signal source for measurements i e it defines which con nector is used to input data to the R amp S FSWP Parameters Source RF Radio Frequency RF INPUT connector RST RF 8 6 2 Configuring UO Analyzer Measurements Manual operation See Radio Frequency State on page 37 INPut UPORt VALue This c

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