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R&S FPS MSRA User Manual

1. 5 LGPRUSUCNICNUICU 5 Documentation OverviQw iioii eser aiino arrima 6 Typographical Conventions eese ener nnne nnn nnns 7 Welcome to the MSRA Operating Mode sssss 8 Starting the MSRA operating mode eessesseseeeeeeeneennnnnnnnnnnnnnnnnn nnn 8 Understanding the Display Information eee enn 9 Typical E Ici m 15 Measurements and Result Displays eeeeeeeee 16 Applications and Operating Modes 18 Available Applications eeeeceeeeeeseeseeeeesseeeee nennen nenne nennen neni nnn tnne nanne nnns 19 Selecting the Operating Mode and Application eese esses 21 Using the Sequencer in MSRA Modee eese nnne nnne nnn nnns 22 MSRA Basi anemias es aeaaaee chau pde eani cm EE cu Ed 24 ContiglratiON m 24 Data Acquisition orien Ron I ERR aaner paraan ERESSERRRR MER ERRARE nudo M AREKORERRRRANRRKE nan ERR ER 25 Multi Standard Analysis essen enne nennen nnn nnn nennen nnn 26 Restrictions for Applications cccceseeeceecceeeeeeeeeeeeeeeeneeneeeeeeeeeeenseeeseeeneaee
2. INPutEIETer YIGES TAT6 occi rper ttr ente t ette dae ved sagen dt Pee cep INPut GAIN S TA Tesoro taba pet ro deg et e D f a e DEAF YE nee evi n du HERE CREER INPUT IMP CCAM CO ia EC Rm INPUESELG Cl M INSTrument CREate DUPLicate INSTrument GREate REPLACE E INSTr ment CREate NEW entr terrere rn ten ner to ne ener nn ner t dnce nien ena ds INSTrume nt BI ilz ia daa 7T MINS TUM ie HISIA seen 78 INSTr merntbMODE tto terret I n eR ee e ex AR dE 79 INSTrumentRENaAME ccoo 79 INSTrument SELect P OUTPut TRIGgersport DIR amp CION cct rre nene tre er en a eni dde i d 94 OUTPut TRIGger lt port lEVel rint ed ro Por dere FE PERS ER EY EY rea 94 OUT PUEMRIGGEFS POM OTY PEE ocean PSOE COMPTE ER SERE INE 94 OUTPut TRIGgersport PULSe IMMediate 2 rrt reni nnne rtr rrt n tnnt 95 OUTPut IRIGger port PULSe DENGIh nane t eerte nee ia 95 STATUS OPERation CONDIION asco iros 114 STATUs OPERalion ENABIG eterne ella 115 STAT s OPERation NTRAhnSItIOnD s cartone erre rrr re e Ea RE KR TES EENAA ETAETA EE Eee ag 115 STATUS OPERALUON PTRANSINON 2 is s courte torre nra eb ENR EFE S Fe NEXU FEX ey TEE FUIS EHE EXE TE sona 115 STATUuUs OPERaltioriBEVENIJ crece rett
3. sssssssse 124 Set rne 46 C Capture buffer cen rre 26 Capture finished SUAS Bites e 113 Capture offset wel MSRA applications 90 Remote eniin sn Peer en o Dto eae 119 enc 50 Capture time see also Measurement time eee 109 cdma2000 BTS MSRA application csi ica mne 20 Center frequency 40 Automatic configuration a 00 Softkey circa 40 Step S ZE iii cita 40 Channel defined Sequencer Enc raei 23 Channels NEW nica 22 Operating modes 210 Replacing rrr trennen tren 22 Closing Channels remote vota 77 Configuration MSRA MOdO isimssrraros ect 30 Continue single sweep SOKO coimas rst edits 52 Continuous Sequencer SOfIKGy ice mete ee scr ee incen 23 Continuous sweep enci 52 Conventions SEPICOMMANOS nseries 71 Copying Measurement channel remote sss 76 Coupling INPUT remote net reme neces 81 D Data acquisitioh iii 16 Analysis itilerVal cion rne re tertii rtis 47 Basics 2 25 Performing remote 104 Procedure 60 Settings 46 Settings remote 65 SORKCY 46 Stat S Dlls 113 Data format ASG C Binary hs REMOTE Mt Default values ics M 31
4. HG 100 TRACGTQANBANGES DAT 1 1 2 11 dla 100 TRACE IO WBANG MB WIDTH idas 101 SENSe IQ BANDwidth BWIDth MODE Mode This command defines how the resolution bandwidth is determined Parameters Mode AUTO MANual FFT AUTO Default 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 10 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 48 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 Parameters lt Bandwidth gt refer to data sheet RST RBW AUTO mode is used Example Usage Manual operation Configuring MSRA Measurements IQ BAND MODE MAN Switches to manual RBW mode IQ BAND RES 120000 Sets the RBW to 120 kHz SCPI confirmed See RBW on page 48 SENSe IQ FFT ALGorithm Method Defines the FFT calculation method Parameters Method Example Usage Manual operation SINGIe
5. RF Atten Manual RF Power Scale Config 97 Sequencer PENAS Single Seglencer eoe tertio re etre 23 Single SWEEP sisstin e mre rtt tn re Pee reet 52 Trigger Config 41 Trigger Offset 1 44 Upper Level Hysteresis caci n ent eerte 56 Specifics for COMPMQUIATION 2 5 e rtr itr re terrenos 33 SRate see Sample Wale init eter toties 12 Standards Multiple analyzing iii 15 Status Capture finished eere 113 Status Dat einen repe rer rer edet 11 Status registers Querying remote 3 x dessa eet nete STATus OPERation is STATUS OPERaltiOn victor nete erae Suffixes COMMON P 75 Remote commahds meinte net eere 72 Sweep A 52 Performing remote cniinne 104 Poiritsl Q Analyzer edente 51 Settings 2 Time remote Sweep status otatus register eret ons 113 T YIG preselector Activating Deactivating 35 Tabs Activating Deactivating remote s 82 Channels rect reete hr rire oc ign 18 MSRA Master rte eret n enn 12 MSRA VIOW erected eene ct 11 TD SCDMA BTS MSRA application tei trennt 20 TPIS VQ AQAA a e ect ertet pco 100 Traces Maximum n rmbet neret aai 75 Retrieving data remote ssssssses 110 Trigger Configuration softkey o 41 Drop oUt time terme ntes 44 External remote re e
6. 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 Common Suffixes 11 1 6 3 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 11 1 2 Long and Short Form on page 72 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 11 1 6 4 Character 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 11 1 6 5 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 transmitted 0 specifies a data block of indefinite length
7. This command defines the length of the pulse generated at the trigger output Suffix lt port gt Selects the trigger port to which the output is sent 2 TRG AUX Parameters lt Length gt Pulse length in seconds Manual operation See Pulse Length on page 46 Configuring Data Acquisition The following commands are required to configure the actual data acquisition Configuring data acquisition is only possible for the MSRA Master channel In MSRA application channels these commands define the analysis interval see chapter 11 9 Commands Specific to MSRA Applications on page 116 Be sure to select the cor rect measurement channel before executing these commands SENSe IQ BANDWIdIhIBWIDth MODI uten e tpe tatnen ne ritate nnne true nnne 96 SENSe lQ BANDwidth BWIDth RESOIUtion 0 ce cece cece cece cece eee eeee eee nese seca nese esa enne 96 SENS amp IG EF T ALGoLHhIm iria cidunt aa 97 SENSe IQ FFT LENGtR eese tette tenente tet tet tette tete ttt tesa 97 Configuring MSRA Measurements ISBNSeTIQ EETAWINBOWEEEINGE I aiu Ai 98 SENSeJIGEEE T2WINBOW ONVER GD 29 aia 98 SENSO JIQ FFT WINDOW T YPE tc ia La pee toca Pu Dena Poe caet roD hp px Dus 98 TPS ESQ BV A M tend ena e tert A a utn ove eve Pe erue 99 TRACSHAQ ribcoi P MM 99 TRAQGIDSRATB a 99 TRAC emi v
8. Measurement Example Analyzing MSR Signals MSRA View MSRA Master Ref Level 10 00 dim Att 20dB Freq 994 9 MHz IQ Analyzer Meas Time Rec Length 3G FDD BTS SRate 1 0 MHz SGL 5 ms pee TRG EXT1 1 Magnitude e1AP Clrw Analysis Interval 5 0 ms Yeu CF 994 9 MHz 1001 pts Fig 10 4 Correlating events in an MSR signal You can assume the GSM burst had an effect on the WCDMA carrier causing an error Conclusion of the measurement example In MSRA mode it is very easy to find crosstalk between different carriers by detecting time correlations between different signals since the analysis is performed on the same recorded l Q data This is especially easy to detect using the analysis line in the MSRA View as the time of a particular event is visible in the captured data and all indi vidual application windows at once MSRA View 33 MSRA Master IQ Analyzer 3G FDD BTS Ref Level 10 00 dir Mess Time 2ims SRate 20 0 MMe RN ester E 20d Freq i0 GMr Reclength 420000 ROW 287k ud 1 Spectrum TF 1 0 GH 1901 pts SRate LOMH SGL ZA Mie Ref Level 10 00 dBm Freq 997 5MHz Channa 0 256 Power 20 Ref Level 10 00 d m 256 p ET sn EI CPICH Slot 1 SymbRate Time 5 mre Meas Rd Freq 9349 MHz Rac Length 5000 TQ Analyzer TRO EXTA Y Hagnituda 3G FDD BTS ze TRO EXTA AAA EE Composite EVM 50 me Analysis interval 145 893 nz 10 0 m Slot 0 Ewi 1i om 14 vst i Civ Analysis interwal 666
9. Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe on page 86 Ref Level Position Defines the reference level position i e the position of the maximum AD converter value on the level axis in 9o 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 87 Scaling Defines the scaling method for the y axis Frequency Settings 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 87 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe MODE on page 86 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
10. Sequencer Mode Defines how often which measurements are performed The currently selected mode softkey is highlighted blue During an active Sequencer process the selected mode softkey is highlighted orange Single Sequence Each measurement is performed once until all measurements in all active channels have been performed Continuous Sequence The measurements in each active channel are performed one after the other repeatedly in the same order until sequential operation is stopped This is the default Sequencer mode Channel defined Sequence First a single sequence is performed Then only channels in continu ous sweep mode are repeated Remote command INITiate lt n gt SEQuencer MODE on page 108 Refresh All This function is only available if the Sequencer is deactivated no sweep is currently running and only in MSRA mode The data in the capture buffer is re evaluated by all active applications for example after a new sweep was performed while the Sequencer was off Note To update only the displays in the currently active application use the Refresh function in the Sweep menu for that application see Refresh on page 51 For details on the MSRA operating mode see the R amp S FPS MSRA User Manual Remote command INITiate n SEQuencer REFResh ALL on page 108 Configuration 6 MSRA Basics Some background knowledge on basic terms and principles used in MSRA operating mode is provided here f
11. Trigger 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 94 Pulse Length Output Type Trigger 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 95 Send Trigger Output Type Trigger 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 95 7 9 7 10 Display Configuration Display Configuration The captured 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 e Select the Display Config button in the Overview e Press the MEAS key e Select the Display Config softkey in the main application menu Up to 6 evaluations can be displayed in the I Q Analyzer and thus in the MSRA Master at any time i
12. Data 2 Q Data 2 512k Q Data 512k 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 Formats for Returned Values ASCII Format and Binary Format For the format QBLock the offset of Q data in the output buffer can be calculated as follows of DataBytes Q Data Offset 2 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 A 2 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 defined 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
13. e analysis of correlated effects due to multiple standards configuration of data acquisition settings only required once for all applications e overview of all results in one screen in addition to large display of individual results common analysis line time marker across all applications performing measurements in the frequency and time domain such as channel power measurements on l Q data This user manual contains a description of the functionality specific to the MSRA oper ating mode including remote control operation All functions not discussed in this manual are the same as in Signal and Spectrum Analyzer mode and are described in the R amp S FPS User Manual The latest version is available for download at the product homepage http www2 rohde schwarz com product FPS html 2 1 Starting the MSRA operating mode MSRA is a new operating mode on the R amp S FPS Although the R amp S FPS does not have a built in display it is possible to operate it inter actively in manual mode using a graphical user interface with an external monitor and a mouse connected E Manual operation via an external monitor and mouse It is recommended that you use the manual mode initially to get familiar with the instru ment and its functions before using it in pure remote mode Thus this document describes in detail how to operate the instrument manually using an external monitor and mouse The remote commands are described in the second
14. EXT2 Trigger signal from the TRIGGER AUX connector RFPower First intermediate frequency IFPower Second intermediate frequency IQPower Magnitude of sampled I Q data For applications that process l Q data such as the I Q Analyzer or optional applications RST IMMediate Example TRIG SOUR EXT Selects the external trigger input as source of the trigger signal Manual operation See Trigger Source on page 42 See Free Run on page 43 See External Trigger 1 2 on page 43 See IF Power on page 43 See RF Power on page 43 See 1 Q Power on page 44 Configuring the Trigger Output The following commands are required to send the trigger signal to one of the variable TRIGGER INPUT OUTPUT connectors OUTPut TRIGgersport DI Rection 2 2 2 areae AAA 94 OUTPUE TRIGE por LEVEL ida 94 OUTPut TRIGger lt port gt OTY POr irisi painian ae aaa aaaaaae aaa ceseseeeseseeeeeeeeeeeeeaeaesanaea 94 OUTPutTRIGGersport gt PULSENMMEGIAte 2 2 aeui rot nae a nn e ar ede ehe 95 OUTPut TRIGger port PULSe ENG 2 2 211 a1 o nro aca 95 Configuring MSRA Measurements 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 port Selects the used trigger port 2 TRG AUX Parameters lt Direction gt INPut Port works as an input OUTPut Port works as an output RST INPut Manual operati
15. Example ADJ ALL Usage Event Manual operation See Adjusting all Determinable Settings Automatically Auto All on page 55 SENSe ADJust CONFigure DURation Duration In order to determine the ideal reference level the R amp S FPS performs a measurement 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 56 SENSe ADJust CONFigure DURation MODE Mode In order to determine the ideal reference level the R amp S FPS performs a measurement on the current input data This command selects the way the R amp S FPS determines the length of the measurement Configuring MSRA Measurements Parameters Mode AUTO The R amp S FPS determines the measurement length automati cally according to the current input data MANual The R amp S FPS uses the measurement length defined by SENSe ADJust CONFigure DURation on page 102 RST AUTO Manual operation See Resetting the Automatic Measurement Time Meastime Auto on page 56 See Changing the Automatic Measurement Time Meastime Manual
16. For example R amp S SMBV with options R amp S SMBV K240 Dig Std GSM EDGE SMBV K242 Dig Std 3GPP FDD SMBV K255 Dig Std EUTRA The vector signal generator is referred to as SMx in the example e 1 coaxial cable 500 approx 1 m N connector e 1 coaxial cable 500 approx 1 m BNC connector To set up the instruments 1 Connect the RF output of the SMx to the RF INPUT connector of the R amp S FPS coaxial cable with an N connector 2 Connect the Marker1 output of the SMx to the TRIGGER INPUT connector of the R amp S FPS coaxial cable with a BNC connector Preparation The waveform of the described multi standard signal is provided in the following file on the R amp S FPS C R_S Instr user Waveforms MSRA_GSM WCDMA LTE GSM wv The signal is described in the Readme txt file in the same folder gt Copy the file from the R amp S FPS to the SMx using a USB stick for example Settings on the R amp S SMx 1 Press the PRESET key to reset the instrument 2 Press the FREQ key and set the frequency to 1 GHz R amp S9FPS MSRA Measurement Example Analyzing MSR Signals 3 Press the LEVEL key and set the level to 0 dBm 4 Press the RF ON OFF key to switch the RF on 5 Press the DIAGRAM key and then select Load Waveform to load the signal data from the provided file From the drive for the USB stick select the file C R_S Instr user Waveforms MSRA GSM WCDMA LTE GSM wv 6 Select the Trigger Marker menu and set
17. Marker1 to Restart Press the ESC key to close the dialog box 7 Switch the State button to ON to activate the waveform Settings on the R amp S FPS 1 Press the PRESET key to preset the R amp S FPS 2 Press the MODE key and select the Multi Standard Radio Analyzer tab Confirm the message to switch to MSRA mode 3 Press the FREQ key and set the Center Frequency to 1 GHz 4 Press the AMPT key and set the reference level to 10 dBm 5 Press the TRIG key and select External Trigger 1 to use the external trigger from the SMx 6 Press the MEAS CONFIG key select the Data Acquisition softkey and set the Sample Rate to 15 MHz Since the R amp S FPS is set to continuous sweep mode by default data acquisition is started automatically The spectrum of the stored MSR signal from the file is dis played in the MSRA Master tab MSRA View 3 MSRA Master Ref Level 10 00 dBm Meas Time s SRate 15 0 MHz Att 20dB Freq 1 0GHz RecLength 00 RBW 14 0 kHz TRG EXT1 1 Spectrum 1001 pts Span 15 0 MHz User Manual 1176 8574 02 06 64 R amp S FPS MSRA Measurement Example Analyzing MSR Signals To analyze the GSM signal Activate an l Q Analyzer to analyze the GSM signal in more detail Only the area around the first carrier is of interest 1 Press the MODE key and select the I Q Analyzer button 2 Press the FREQ key and set the center frequency to 994 9 MHz 3 Press the MEAS CONFIG key select the Data A
18. See Attenuation Mode Value on page 36 INPut ATTenuation AUTO State This command couples or decouples the attenuation to the reference level Thus when the reference level is changed the R amp S FPS 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 36 Configuring MSRA Measurements INPut EATT lt Attenuation gt This command defines an electronic attenuation manually Automatic mode must be switched off INP EATT AUTO OFF see INPut EATT AUTO on page 85 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 attenuation in dB Range see data sheet Increment 1dB RST 0 dB OFF Example INP EATT AUTO OFF INP EATT 10 dB Manual operation See Using Electronic Attenuation on page 37 INPut EATT AUTO State This command turns automatic selection of the electronic attenuation on and off If on electronic attenuation reduces the mechanical attenuation whenever possible Parameters State ON OFF 0 1 RST 1 Example INP EATT AUTO OFF Manual operation See Using Electronic Attenuation on page 37 INPut EATT STATe
19. 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 11 2 Common Suffixes The following common suffixes are used in remote commands specific to MSRA mode Suffix Value range Description m 1 16 Marker n 1 6 Window lt t gt 1 6 Trace Activating MSRA Measurements 11 3 Activating MSRA Measurements MSRA measurements requires a special operating mode on the R amp S FPS A measure ment is started immediately with the default settings referred to by the channel name MSRA Master This channel cannot be replaced CD The special MSRA Master measurement channel is of the channel type IQ and is deleted or renamed INS Trument CREate DUPPICalte 1 3 cde riri code anida taaan dei E 76 INS TrumentOREatel NEM aita desee tte poe po ttt ee betae repetere ret oe veh regata 76 INS Trument GREateBEPI dO o roi o ertt eode cise tese ree rei reete e n de enis TT INSTrumentDELele darte en eoo rede ae 77 INS TOMES Te iia A E A Ar 78 INSTTUMENtEMODE 2 ro rrt Ped edi AA 79 INSTrumentRENSIe diete etri too a aaa la a 79 INS Trumen SELS euidenter aga 79 SYSTemiPRESSePDUOOMPO3AlIbI ria td ti 80 SYSTem PRESetCHANnsI EXEQCule 1 1 ii e 80 INSTrument CR
20. 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 3 measurement channels ADEM Analog Demod IQ IQ Analyzer IQ IQ Analyzer2 Usage Query only Table 11 1 Available measurement channel types and default channel names in MSRA mode Application lt ChannelType gt Parameter Default Channel Name 1 Q Analyzer IQ IQ Analyzer Pulse R amp S FPS K6 PULSE Pulse Analog Demodulation ADEM Analog Demod R amp S FPS K7 GSM R amp S FPS K10 GSM GSM Transient Analysis TA Transient Analysis R amp S FPS K60 VSA R amp S FPS K70 DDEM VSA 3GPP FDD BTS BWCD 3G FDD BTS R amp S FPS K72 TD SCDMA BTS BTDS TD SCDMA BTS R amp S FPS K76 cdma2000 BTS R amp S FPS BC2K CDMA2000 BTS K82 1xEV DO BTS R amp S FPS BDO 1xEV DO BTS K84 WLAN R amp S FPS K91 WLAN WLAN LTE R amp S FPS K10x LTE LTE Note the default channel name is also listed in the table If the specified name for a new channel already exists the default name extended by a sequential number is used for the new channel Activating MSRA Measurements INSTru
21. 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 e Optionally if a bandwidth extension gt 160 MHz is installed the Maximum Bandwidth depending on whether you require a larger bandwidth or fewer spurious emissions 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 If necessary select the Display Config button and select other displays up to a total of 6 required to control the acquired data Arrange them on the display to suit your preferences 9 Exit the SmartGrid mode 10 Optionally stop continuous measurement mode by the Sequencer and perform a single data acquisition a Select the Sequencer icon E from the toolbar b Set the Sequencer state to OFF c Press the RUN SINGLE key 11 Optionally export the captured or analyzed l Q data depending on the active channel to a file a Select the El Save icon in the toolbar b Select the I Q
22. 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 A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input Definitions e Input sample rate ISR the sample rate of the useful data provided by the device connected to the input of the R amp S FPS Sample Rate and Maximum Usable I Q Bandwidth for RF Input User Output Sample rate SR the sample rate that is defined by the user e g in the Data Aquisition dialog box in the I Q Analyzer application and which is used as the basis for analysis or output e Usable l Q 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 FPS e Record length Number of l Q samples to capture during the specified measure ment 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 FPS The p
23. iere eatin tes 76 Analyzing 116 Configuring remote 81 Correlating 18 Default vales rrt tents 31 Isesult displays rient ritiene rhe 16 Modes see Operating mode tinte 18 MSRA applications accionaria 18 EV DO BIS tn t ie Cle nd retia Hs eee Os 21 9G FDD BIS et ata reete se eite 20 Analysis interval remote ei 116 Analyzing l Q data eter 61 NEU M 19 Capture offSeL rer eterne rem tere 50 Capture offset remote sssssssssss 119 CdmaZ000 BTS zii hee itor eed ies 20 Display elemenhts 2er terrre erba 13 GSM furi 20 MQ Analyzer 5t cte eese na 19 A rrr tra ear E ndn 24 argento o Pm 27 Sel ctihig eder etit ere e edens 21 Specific commands remote sssss 116 TD SGDMAIBTS nui veste tooo 20 MSRA Master Analyzing Capturing data Configuring Data ACQUISITION arica nire nnn Data acquisition basics sssese 25 Data acquisition remote sssssusssss 95 Display le MENS succionar 12 Patatfielers aritgin hyni Si Ee ex 24 Resu lts display inicia a 16 Selecting remiole oret err ia 76 TRAD dee Steet O 12 Trigger offset er eerte rtt etre recen 44 A creme tenen 41 MSRA mode Iemote control cete tene eren 70 MSRA VIEW cin rtv et ioter t Mei Cit 61 Display elemehl
24. 813 uz Ml Wi W MO ih Fig 10 5 MSRA View of MSR signal with time correlations 68 R amp S9FPS MSRA Measurement Example Analyzing MSR Signals E The MSRA also allows you to capture very long data sequences In order to examine particular areas of the large l Q memory each MSRA application supports a Capture Offset setting TRIG menu or Data acquisition Signal Capture dialog box In the MSRA Master tab the vertical blue lines in the Magnitude result display indi cate which time interval of the I Q data is analyzed by the individual applications In this example 40 ms are captured the 3GPP FDD BTS application starts analysis at a Cap ture Offset of 20 ms 5 divisions with 4 0 ms div and the I Q Analyzer starts with an offset of 31 5 ms O Capturing and analyzing long data sequences MSRA Vie 1Q Analyzer 3G FDD BTS Ref Level 10 3m Meas Time 40ms SRate 15 0 MHz Att dB 1 0GHz Rec Length 600000 1 Magnitude CF 1 0 GHz 1001 pts E User Manual 1176 8574 02 06 69 11 11 1 Introduction Remote Commands to Perform Measure ments in MSRA Mode The following commands are specific to performing measurements in MSRA mode in a remote environment Generally the remote commands are identical to those used in Spectrum mode as described in the R amp S FPS User Manual However some restric tions or conditions may apply to specific commands see also chapter 6 MSRA Basics on page 24 Y
25. Auto Level This function is only available for the MSRA Master not for the applications Remote command SENSe ADJust ALL on page 102 Adjusting the Center Frequency Automatically Auto Freq The R amp S FPS adjusts the center frequency automatically Automatic Settings 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 At the same time the optimal reference level is also set see Setting the Reference Level Automatically Auto Level on page 56 Remote command SENSe ADJust FREQuency on page 103 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 FPS You can change the measurement time for the level measurement if necessary see Changing the Automatic Measurement Time Meastime Manual on page 56 Remote command SENSe ADJust LEVel on page 104 Resetting the Automatic Measurement Time Meastime Auto Resets the measurement duration for automatic settings to the default value Remote command SENSe ADJust CONFig
26. Manual Remote command INITiate lt n gt IMMediate on page 107 Continue Single Sweep After triggering repeats data acquisition without deleting the trace of the last measure ment If the Sequencer is off only the evaluation for the currently displayed measure ment channel is updated 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 106 User Manual 1176 8574 02 06 52 T 8 QD Output Settings Output Settings The R amp S FPS can provide output to special connectors for other devices For details on connectors refer to the R amp S FPS Getting Started manual Front Rear Panel View chapters How to provide trigger signals as output is described in detail in the R amp S FPS User Manual Output settings can be configured via the INPUT OUTPUT key or in the Outputs dia log box Output Digital IQ IF Video Output IF Out Frequency NOISE SOUCO ui A E a A idea aaa 53 INTI Lita vaca tans vata deuenieceneaeuy vagaries vege acanenved neat yecaeaneaceebaae ayes 53 L Output TOO NE T 54 2 54 A POENI T mS 54 BEC UON o NU UE 54 Noise Source Switches the supply voltage for an external noise source on the R amp S FPS on or off if available External noise s
27. The following topics are included Welcome to the MSRA Operating Mode Introduction to and getting familiar with the operating mode Typical Applications Example measurement scenarios in which the operating mode is frequently used e Measurements and Result Displays Details on supported measurements and their result types e MSRA Basics Background information on basic terms and principles in the context of the MSRA operating mode e MSRA Configuration A concise description of all functions and settings available to configure an MSRA measurements with their corresponding remote control command e How to Perform Measurements in MSRA Mode The basic procedure to perform an MSRA measurement with step by step instruc tions e Measurement Examples Detailed measurement examples to guide you through typical measurement sce narios and allow you to try out the operating mode immediately Optimizing and Troubleshooting the Measurement Hints and tips on how to handle errors and optimize the test setup e Remote Commands for MSRA Measurements Remote commands required to configure and perform MSRA measurements 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 FPS User Manual Programming examples demonstrate the use of many commands and can usually be executed directly for test purposes Annex Reference material List of remo
28. aiii 36 FRPP RCO IMU AUN cc di E dais 36 L Attenuation Mode ValUe cccccccscsscssssesssssesesesesescsccessstessneseseseceneseseeceees 36 Using Electronic Attemuallgii rn Ernte na 37 AYU UT SS E a 37 L Preamplifier option B22 B24 cssscssscseseseseccsesssssesesseceeseeseccsenencneecees 37 R amp S FPS MSRA Configuration P A T M n H rrs pm Reference Level Defines the expected maximum reference level Signal levels above this value may not be measured correctly which is indicated by the IF OVLD status display OVLD for digitial baseband input The reference level is also 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 FPS is adapted according to this value it is recommen ded 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 83 Shifting the Display Offset Reference Level Defines an arithmetic level offset This offset is added to the measured level The scal ing 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 FPS So t
29. analysis interval displayed in the window title bar which indicates that the data displayed in the EVM vs Chip window was captured in the time interval 667 us to 1 3 ms referred to the absolute time of the l Q signal cap tured with the MSRA Master c Press the PEAK SEARCH key to place Marker1 on the chip with the highest EVM in slot 1 Ref Level 10 00 dem Freq 997 5MHz Channel 0 256 Power Rel to CPICH At 20 dB CPICH Slot 1 SymbRate 15 ksps 3G FDD BTS au TRG EXT1 1 Composite EVM 1 Clrw Analysis Interval 145 893 ms 10 0 ms Slot 0 Slot 14 2 EVM vs Chip i Clrw erval 666 813 ps 1 333 ms Chip 2559 Fig 10 3 Determining the chip with the highest EVM in a WCDMA slot To determine time correlations in the MSR signal You can use the analysis line to mark an occurrance in time in one application and see the same moment in time in another application and thus find the source of irregulari ties 1 Select the I Q Analyzer tab 2 Select the BN icon in the toolbar and move the analysis line either using the rotary knob or by dragging the line on the screen until it reaches the irregular EVM in the EVM vs Chip display The new position of the analysis line in the example is 1 156ms If you switch to the IQ Analyzer and regard the Magnitude display you see that the analysis line is on the rising edge of the GSM burst User Manual 1176 8574 02 06 67 R amp S9FPS MSRA User Manual 1176 8574 02 06
30. command SENSe SWEep POINts on page 109 Refresh This function is only available if the Sequencer is deactivated and only for MSRA applications The data in the capture buffer is re evaluated by the currently active application only The results for any other applications remain unchanged This is useful for example after evaluation changes have been made or if a new Sweep was performed from another application in this case only that application is updated automatically after data acquisition Note To update all active applications at once use the Refresh all function in the Sequencer menu Remote command INITiate lt n gt REFResh on page 118 R amp S FPS MSRA Configuration c 7 P AY j SUaqaao n H Continuous Sweep RUN CONT After triggering initiates data acquisition continuously until stopped If the Sequencer is off only the evaluation for the currently displayed measurement channel is updated 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 th
31. in RST LOGarithmic Example DISP TRAC Y SPAC LIN Selects linear scaling in Usage SCPI confirmed Manual operation See Scaling on page 38 Frequency SENSe FREQUEN O CENTO asiatica 88 SENSe FREQuency CENTOESTEP coccion aida 88 SENSe FREQuency CENTer STEP AUTO ococccccncnconononnononcnncnoncn coco corno coronar arcano 88 SENSE FREQUENCY OFESgl aora 89 Configuring MSRA Measurements SENSe FREQuency CENTer Frequency This command defines the center frequency Parameters Frequency 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 40 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 88 Parameters lt StepSize gt fmax iS specified in the data sheet Range 1 to fMAX RST 0 1
32. messages in the status bar of the applications where necessary 6 2 Data Acquisition As mentioned before only the MSRA Master performs a data acquisition Thus the MSRA Master defines the center frequency sample rate and record length of the cap tured l Q data It also defines the trigger event thus all applications have the same trig ger However an offset from the trigger can be defined by the individual applications see Trigger offset vs capture offset on page 27 Performing sweeps When you switch to MSRA mode the Sequencer is automatically activated in continu ous mode The MSRA Master continuously performs a data acquisition If any applica tions are activated then after each measurement the data in the active applications is evaluated one after the other The MSRA Master will then repeat the data acquisition and evaluate the new data etc The channel displays are updated after each measure ment or evaluation Alternatively you can perform measurements manually You can start a single or con tinuous sweep from any application which updates the data in the capture buffer and the results in the current application The results in the other applications however remain unchanged You must refresh them manually either individually or all at once using a Refresh function Note that in continuous sweep mode sweeping is aborted when you switch to a dif ferent application You can then continue sweeping from there Th
33. part of the document To activate the MSRA operating mode 1 Select the MODE key A dialog box opens that contains all operating modes and applications currently available on your R amp S FPS 2 Select the Multi Standard Radio Analyzer tab 3 Understanding the Display Information Signal Spectrum Analyzer Multi Standard Radio Analyzer New ER ES ES Channel Spectrum Analog Demod IQ Analyzer CDMA2000 BTS Confirm the message informing you that you are changing operating modes The R amp S FPS closes all active measurement channels in the current operating mode then opens a new measurement channel for the MSRA operating mode In addition to the MSRA View an MSRA Master tab is displayed The Sequencer is automatically activated in continuous mode see chapter 5 3 Using the Sequencer in MSRA Mode on page 22 starting an I Q Analyzer data acquisition with the default settings but with a Spectrum result display It can be configured in the MSRA Overview dialog box which is displayed when you select the Overview softkey from any menu see chapter 7 Configuration on page 30 Remote command INST MODE MSR see INSTrument MODE on page 79 2 2 Understanding the Display Information The following figure shows a screen display during MSRA operation All different infor mation areas are labeled They are explained in more detail in the following sections o The orange background of the
34. rreere 48 Advanced FFT mode Basic settings di 49 L Transformation Algorithm eeessseseseeeeee tette tete nnnn tees 49 A RM 49 L Window Function cin ies edt ii 49 EMI ra NRI 50 A A 50 Capture DS aida iaa tabs 50 Sample Rate Defines the I Q data sample rate of the R amp S FPS This value is dependent on the defined Analysis Bandwidth and the defined signal source The following rule applies sample rate analysis bandwidth 0 8 For details on the dependencies see chapter A 3 Sample Rate and Maximum Usable Q Bandwidth for RF Input on page 123 Remote command TRACe 10 SRATe on page 99 Data Acquisition and Bandwidth Settings 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 99 Meas Time Defines the I Q acquisition time By default the measurement time is calculated as the number of I Q 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 A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input on page 123 Remote command SENSe SWEep TIME on page 109 Record Length Defines the number of I Q samples
35. screen behind the measurement channel tabs indi cates that you are in MSRA operating mode The E icon on the tab label indicates that the displayed trace e g in an MSRA application no longer matches the currently captured data This may be the case for example if a data acquisition was performed in another application As soon as the result display is refreshed the icon disappears The Hl icon indicates that an error or warning is available for that measurement channel This is particularly useful if the MSRA View tab is displayed An orange IQ indicates that the results displayed in the MSRA application s no lon ger match the data captured by the MSRA Master The IQ disappears after the results in the application s are refreshed R amp S9FPS MSRA Welcome to the MSRA Operating Mode NEIN MSRA m 1 MSRA Master Rel Level 0 dr Meas Time 21 SRate 10 Att 1008 Freq 13 25GHe RecLength 21000 RBW L pe 1 Spectrum Q 6 7 Magnitude 1 MSRA View overview of all active channels in MSRA mode 2 MSRA Master data acquisition channel with global configuration settings 3 Measurement channel tab for individual MSRA application 4 Channel bar for firmware and measurement settings of current application 5 6 Window title bar with diagram specific trace information and analysis interval applications 7 Diagram area 8 Diagram footer with diagram specific information depending on evaluation 9 Instrument st
36. the capture buf fer start and the start of the extracted application data The off set must be a positive value as the application can only analyze data that is contained in the capture buffer Range O to Record length RST 0 Manual operation See Capture Offset on page 50 Programming Example Analyzing MSR Signals The following programming example demonstrates the use of the most important remote commands in MSRA mode The example is based on the measurement exam ple for manual operation described in chapter 10 Measurement Example Analyzing MSR Signals on page 63 Preset RST Select Trace data output format ASCII FORM ASCII Switch to MSRA mode INST MODE MSR Set Sequencer in single mode INIT SEQ MODE SING Programming Example Analyzing MSR Signals Preconfigure MSRA Master for general I Q data acquisition Set initial center frequency FREQ CENT 1000MHz Set Level DISP WIND TRAC Y SCAL RLEV 10 dBm Set Trigger to External 1 TRIG SOUR EXT a Set Sample Rate to 15MHz TRACe IQ SRATe 15E6 Set Record Length to 1Msample gt AQT 21 ms TRACe IQ RLENgth 315000 Create new measurement channel for 1 0 Analyzer INST CRE IQ IQ Analyzer Set initial center frequency FREQ CENT 994 9 MHz Set Sample Rate to 1MHz TRACe IQ SRATe 1E6 Set Record Length to 1Msample gt AQT 5 ms TRACe IQ RLENgth 5000 Create measurement channel for 3GPP FDD BTS applicatio
37. to record By default the number of sweep points is used The record length is calculated as the measurement time multiplied by the sam ple rate If you change the record length the Meas Time is automatically changed as well 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 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 outside the valid range of sweep points i e less than 101 points or more than 32001 points the diagram does not show valid results Remote command TRACe IQ RLENgth on page 99 RBW Defines the resolution bandwidth The maximum RBW corresponds to the Analysis Bandwidth The minimum RBW depends on the sample rate 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 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 correlated 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 informa
38. x span Default unit Hz Example FREQ CENT 100 MHz FREQ CENT STEP 10 MHz FREQ CENT UP Sets the center frequency to 110 MHz Manual operation See Center Frequency Stepsize on page 40 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 11 4 1 4 O Configuring MSRA Measurements Parameters State 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 All results of type frequency will be corrected for this shift numerically by the application See also Frequency Offset on page 40 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 40 Configuring the Outputs Configuring trigger input output is described in chapter 11 4 2 2 Configuring the Trig ger Output on page 93 DIAGNOSE SERVICE NSQUICO ciasin
39. Channel button in the lower lefthand corner of the Overview to restore all 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 FPS except for the default Spectrum application channel For details see chapter 7 1 Default Settings for MSRA Measurements on page 31 Remote command SYSTem PRESet CHANnel EXECute on page 80 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 Input Source Settings The input source determines which data the R amp S FPS will analyze Input settings can be configured in the Input dialog box T 3 1 Input Source Settings Some settings are also available in the Amplitude tab of the Amplitude dialog box e Radio Frequency INPUE case oet cendi A ain e 34 Radio Frequency Input The default input source for the R amp S FPS is Radio Frequency i e the signal at the RF INPUT connector of the R amp S FPS If no addi
40. Diagram area Displayed Diagram footer information Direct path acm M 81 Display configuration feci M 55 Display elements MSRA nice a lo Paten esee tu 9 Drop out time Em a M 44 Duplicating Measurement channel remote sss 76 E Electronic input attenuation sesssussssss 36 37 Errors VE OVIED sey c 36 Exporting Hem rcm External trigger aes Level remote caters teeth re needed at 91 F FFT Window fUnctlOnis asii 49 Filters Bandwidth l Q data 2 2 nne itte 48 YIG remote Format BI Sa 123 Data remote cete esee ince oie eds 110 I Q data fil s 5 ie ese etta 122 Free Run IM cecidere ee ea il oneris Cin ate reu aee eet 43 Frequency Configura viaria Configuration remote i erri ieliias Frontend settings ped 81 G GSM MSRA application erre een 20 H Hardware settings DISPIAY c 12 Displayed 2 terre eere tri rentre 12 Hysteresis Lower Auto level Trigger ines Upper Auto level l 1 Q Analyzer Analysis interval 1 2 reete nep eren 58 MSRA application s m 19 MSRA Master socorrista 16 116 1 Q data Analyzing 61 Availability 225 Capturing 60 EXpOflifig Dorise rte t e eter ertet 58 Fi
41. Eate DUPLicate This command duplicates the currently selected measurement channel 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 Spectrum gt Spectrum 2 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 Spectrum INST CRE DUPL Duplicates the channel named Spectrum and creates a new measurement channel named Spectrum 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 Channel type of the new channel For a list of available channel types see INSTrument LIST on page 78 Activating MSRA Measurements lt ChannelName gt 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 78 Example INST CRE SAN Spectrum 2 Adds an additional spectrum display named Spectrum 2 Manual operati
42. Export softkey c Define a file name and storage location and select Save The captured data is stored to a file with the extension iq tar Now you can analyze the captured l Q data in various MSRA applications at the same time How to analyze the captured I Q data in MSRA applications 1 Press the MODE key and select an MSRA application 2 Select the Overview softkey to display the Overview for the MSRA application 3 Define the application data extract i e the range of the capture buffer you want to analyze in this application 4 Define the analysis interval i e the frame number or similar within the application data you want to analyze in this application not necessary for I Q Analyzer or Ana log Demodulation applications 5 Select the Frequency button and define the center frequency for the analysis interval 6 Select the Display Config button and select other displays up to a total of 6 to analyze the data in the configured interval Arrange them on the display to suit your preferences T Exit the SmartGrid mode Repeat these steps for any other applications How to perform multi standard analysis of the I Q data 1 Perform a single l Q data aquisition measurement as described in How to capture I Q data in MSRA mode on page 60 2 Activate measurement channels for the MSRA applications you require as descri bed in How to analyze the captured l Q data in MSRA applications on page 61 3 Se
43. FPS MSRA MSRA Basics The analysis interval is indicated in the window title bar for each evaluation and can be queried via remote control lyzer Analog Demodulation the analysis interval is identical to the application data E For applications that do not allow you to restrict the evaluation range e g I Q Ana extract Trigger offset vs capture offset The beginning of the capture buffer is defined by the trigger event and the trigger off set The trigger source is defined by the MSRA Master which means that all channels use the same trigger However each application might need a different trigger offset or a different number of pretrigger samples Instead of a trigger offset the applications define a capture offset The capture offset is defined as an offset to the beginning of the capture buffer Thus the beginning of the application data extract is calculated as time of trigger event trigger offset capture offset Note that while the trigger offset value may be negative thus starting before the trigger event the capture offset may not A negative capture offset would mean the applica tion data would start before the first sample of the capture buffer The pre trigger off set in the MSRA Master must be configured such that the required number of pre trig ger samples for the applications are available Analysis line A frequent question when analyzing multi standard radio signals is how each data channel i
44. MSRA Master all active applications are displayed in individual windows Each application has its own channel bar with the current settings as well as a button in order to switch to that application tab directly The MSRA View displays the following basic elements MSRA View 23 MSRA Master GSM 3G FDD BTS 1 Marker T ID t nw Mete Doom mm an mo Sete 100 Lr n te ionga 419008 1 Channel information bar for the MSRA Master 2 Application data coverage for each active application 3 Result display for MSRA Master for entire capture buffer 4 Channel information bar for application with button to switch to application tab 5 Result display for application for analysis interval User Manual 1176 8574 02 06 11 R amp S FPS MSRA Welcome to the MSRA Operating Mode m HR p UAE EEUU USES 2 2 2 MSRA Master The MSRA Master is the only channel that captures data It also controls global config uration settings for all applications The MSRA Master channel itself is implemented as an I Q Analyzer application The MSRA Master measurement channel cannot be deleted or replaced The following figure shows the screen elements specific to the MSRA Master MSRA View 32 MSRA Master GSM 3G FDD BTS Ref Level 10 0 m Meas Time 21 ms SRate 20 0 MHz Att 20 dt 1 wiz RecLength 420000 TRG EXT1 2 Magnitude 2 e CF 1 0 GHz 1001 pts 1 C
45. 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 TO RLENgth zeros are appended 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 IQ FFT WINDow LENGth and SENSe I0 FFT WINDow OVERlap RST AVER IO FFT ALG SING SCPI confirmed See Transformation Algorithm on page 49 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 NoOfBins Example Usage Manual operation integer value Range 3 to 524288 RST 4096 IQ FFT LENG 2048 SCPI confirmed See FFT Length on page 49 Configuring MSRA Measurements 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 Usage SCPI confirmed Manual operation See Window Length on page 50 SENSe IQ FFT WINDow OVERIap Rate Defines the part of a single FFT window that is re calculat
46. R amp S FPS automatically recognizes the data it receives regardless of the format Retrieving Results Parameters Format 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 In the Spectrum application the format setting REAL is used for the binary transmission of trace data For 1 Q data 8 bytes per sample are returned for this format set ting RST ASCII Example FORM REAL 32 Usage SCPI confirmed TRACe IQ DATA This command queries the captured data from measurements with the I Q Analyzer To get the results the command also initiates a measurement with the current settings of the R amp S FPS Return values Results Measured voltage for and Q component for each sample that has been captured during the measurement The data format depends on TRACe 10 DATA FORMat on page 112 Default unit V Example TRAC IQ STAT ON Enables acquisition of I Q 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 format of response data TRAC 10 DATA Starts measurement and reads results Usage Query only Retrieving Resu
47. R amp S9FPS MSRA Multi Standard Radio Analyzer User Manual 1001 pts 2 5 MH2 1176 8574 02 06 ROHDE amp SCHWARZ Test amp Measurement User Manual This manual applies to the following R amp S FPS models with firmware version 1 30 and higher e R amp S FPS4 1319 2008K04 e R amp S FPS7 1319 2008K07 e R amp S FPS13 1319 2008K13 e R amp S FPS30 1319 2008K30 e R amp S FPS40 1319 2008K40 The firmware of the instrument makes use of several valuable open source software packages For information see the Open Source Acknowledgement 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 O 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 E mail 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 S9FPS is abbreviated as R amp S FPS R amp S FPS Multi Standard Radio Analyzer is abbreviated as R amp S FPS MSRA 1 1 1 2 1 3 2 1 2 2 5 1 5 2 5 3 6 1 6 2 6 3 6 4 6 5 7 1 7 2 7 3 7 4 7 5 7 6 T4 7 8 7 9 Contents Preta
48. RA Master see also chapter 6 3 Multi Standard Analysis on page 26 Generally if a signal contains data channels for multiple standards the individual applications are used to analyze the channel for the corresponding standard Thus it is of interest to know which appli cation is analyzing which part of the captured data or more precisely which data chan nel The MSRA Master display indicates the data covered by each application restric ted to the channel bandwidth used by the corresponding standard by vertical blue lines labeled with the application name For applications that support several standards e g VSA LTE an estimated or user defined bandwidth is indicated MSRA Applications The data captured by the MSRA Master measurement or only parts of it can be eval uated by various applications The measurement channel for each application contains the settings and results for the application data extract from the capture buffer The following figure shows the screen elements specific to the MSRA application tabs MSRA View 33 MSRA Master GSM 3G FDD BTS Ref Level 10 00 dm Freq 997 5MHz Channel 0 256 Power OE Att 20 dB CPICH Slot 1 SymbRate TRG EXT1 2 EVM vs Chip 2 Chip 0 256 Chip 1 Channel information bar for application 2 Analysis interval for current evaluation 3 Result display for analysis interval 4 Analysis line User Manual 1176 8574 02 06 13 Understanding the Display Information The d
49. Relationship to bandwidth 124 REMOS ii ES 99 Scaling COMMQUTATION iras a 37 A A faa craveuturtvacsiedverttetucsysd 38 Y axis remote control sss 87 Sequencer Aborting remote Activating remote Continuous sweep sop Mode remote De HER eap REA MSRA mode Remote Result display Softkey dus Hlc Signal source A sent 82 Single Sequencer lec EE 23 Single sweep lec 52 Slope WII dis obe react rete e res e Pr ea 45 92 SMX quc 63 Softkeys Amplitude Gori c eter nter etre 35 rope 55 fired i o E 55 Auto Level 56 Capture Offset 2 50 CENTET ep DE 40 Channel defined Sequencer 2229 Continue Single Sweep 2 92 Continuous SEQUENCER eiiiai 23 Contin oUs SWEEP c ico taken ent 52 Data Acquisition i Display CONO artnet eerie EXtermal tee poti rtt eo o Hd Dc hose Free Run Frequency Config I Q Power 44 IEPOWE iii we 43 Input Source Config arga Lower Level Hysteresis cete 57 Meastlme Alo oiii cei teniente et 56 Meastime Manual 52 56 Outputs Config nd Preamp es 37 Ref Level 2 90 Ref Level Offset 1 96 O eid ioa ree tede z erui pager perat 51 Refresh Alli e ed HU Rd tuts 23 RF Atten Auto
50. State This command turns the electronic attenuator on and off Parameters State ON OFF RST OFF Example INP EATT STAT ON Switches the electronic attenuator into the signal path Manual operation See Using Electronic Attenuation on page 37 Configuring a Preamplifier INPUEGAINESTA TE 2 irat aria 85 INPut GAIN STATe lt State gt This command turns the preamplifier on and off Configuring MSRA Measurements If activated the input signal is amplified by 20 dB If option R amp S FPS B22 is installed the preamplifier is only active below 7 GHz If option R amp S FPS B24 is installed the preamplifier is active for all frequencies Parameters State ON OFF RST OFF Example INP GAIN STAT ON Switches on 20 dB preamplification Usage SCPI confirmed Manual operation See Preamplifier option B22 B24 on page 37 Scaling the Y Axis bISPlayEWINDowensTRACestENYESOALe citate catt ertt tetti hend estet te 86 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO ONCE eee 86 DISPlay WINDow n TRACe t Y SCALe MODE eese 86 DISPlay WINDow n TRACe t Y SCALe RPOSition esee 87 bISPlayPWINDowensETRACSSE Y SPACING isis 87 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe lt Range gt This command defines the display range of the y axis for all traces t is irrelevant Example DISP TRAC Y 110dB Usage SCPI confirmed Manua
51. T sweep on the captured l Q data providing power vs frequency results or uses the RBW filter to obtain power vs time zero span results This data is then used for the common frequency or time domain measure ments provided by the R amp S FPS Spectrum application such as ACLR SEM or CCDF Configuration Apart from the data capturing process the measurements are identical in the Spectrum and I Q Analyzer applications They are configured using the same settings and pro vide the same results The Magnitude result display in the I Q Analyzer for instance will principally show the same results as the zero span measurement for the same data However while the Magnitude evaluation is configured by the I Q analysis bandwidth and the measurement time the zero span measurement is configured by the center frequency RBW and sweep time settings Internally these time domain settings are converted to the required l Q settings by the I Q Analyzer The time and frequency domain measurements and the required settings are descri bed in detail in the R amp S FPS User Manual User Manual 1176 8574 02 06 28 Measurements in the Time and Frequency Domain Limitations However since the data in the l Q Analyzer application is captured by the Master independently of the specific time or frequency measurement requirements concerning the RBW filter type and number of sweep points in the application some restrictions may apply to these measure
52. WCED isis A ri 52 ACIDE COUPIING uterina dera 34 Activating MSRA remote circa cada cla HE 76 Amplitude Configuration Scaling ee IIo Analysis Bandwidth nt ici 48 Bandwidth definition we 123 Iu C S 58 Analysis ititerVal cocina posi 26 GOmMMQUPATION EP 58 Configuratiori remote ncn teneis 116 l Q Analyzer icc neret 47 58 jc 27 Analysis lile iio rre orn cre ac rie t 27 CONTIQUEAION OR S 58 Application data 26 Availability Socia eere tr enr rines 25 Configuration remote sese 116 COVOIdgB cinerem esc 11 13 RESIGNS ccoo 27 Results Settings MA iii ii M Applications see MSRA applications o oonnncnnonncncninnonncccnacanacaninnos 18 AQT Displayed sirsiran 12 Attenuation PU EPA E E E E Displayed eere rent ee rte ra erint re 12 Tei 37 Manual desir a ie 36 A M 37 P Aire 55 Auto freqUehOy tcs 55 Auto level Iysterasis uote a 56 57 Reference level Ec Auto settings Meastime Auto siirinsesi ai Meastime Manual y MSRA MasSler rer rr rrr e eres acum B Bandwidth fI Is 48 Extension options 124 Maximum usable ai 123 Relationship to sample rate
53. activated 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 Capturing Data and Performing Sweeps 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 Manual operation See Refresh All on page 23 SENSe SWEep POINts lt SweepPoints gt This command defines the number of sweep points to analyze after a sweep Example SWE POIN 251 Usage SCPI confirmed Manual operation See Sweep Points on page 51 SENSe SWEep TIME Time This command defines the sweep or data capture 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 48 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 FPS User Manual Retrieving Results Parameters State ON OFF 0 1 ON 1 The Sequencer is activated and a seque
54. assband of these digital filters determines the maximum usable I Q bandwidth In consequence signals within the usable I Q bandwidth passband remain unchanged while signals outside the usable I Q 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 l Q band width Bandwidth extension options D The maximum usable l Q bandwidth provided by the R amp S FPS in the basic installation can be extended by additional options These options can either be included in the ini tial installation B options or updated later U options The maximum bandwidth provi ded by the individual option is indicated by its number for example B40 extends the bandwidth to 40 MHz As a rule the usable I Q bandwidth is proportional to the output sample rate Yet when the I Q bandwidth reaches the bandwidth of the analog IF filter at very high output sample rates the curve breaks e Bandwidth Extension Options sssssssssesesse nennen ennt enne 124 e Relationship Between Sample Rate Record Length and Usable I Q Bandwidth 124 e R amp S FPS without additional bandwidth extension options ssss 126 e R amp S FPS with option B40 I DQ Bandwidth Extension ssssssssss 127 e R amp S FPS with a
55. atus bar with error messages progress bar and date time display The diagram area varies depending on the type of measurement channel as described in detail in the following topics Window title bar information For each diagram the header provides the following information 1 Magnitude ysis Interval Fig 2 1 Window title bar information in MSRA mode 1 Window number 2 Window type 3 Trace color 4 Trace number 5 Detector 6 Trace mode 7 Analysis interval 8 Analysis line indication Diagram footer information The information in the diagram footer beneath the diagram depends on the evalua tion User Manual 1176 8574 02 06 10 R amp S FPS MSRA Welcome to the MSRA Operating Mode e Center frequency e Number of sweep points e Range per division x axis e 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 If an error or warning is available for a measurement channel the Bl icon is displayed next to the tab label in the channel bar 2 2 1 MSRA View The MSRA View is an overview of all active channels in MSRA mode similar to the MultiView tab in Signal and Spectrum Analyzer mode At the top of the screen the MSRA Master is displayed i e the application that captures data Beneath the
56. ay buttons until you see Composite EVM then drag the button to the diagram area of the display The Code Domain Power display is replaced by the Composite EVM dis play C Select the red cross at the top of the result display list 2X to close the Smart Grid mode To optimize the diagram display press the AUTO SET key and select Auto Scale Window MSRA View MSRA Master 1Q Analyzer 3G FDD BTS Ref Level 10 Freq 997 5 MHz Channel Power Rel te s Att O dB CPICH Slot SymbRate TRG EXT1 1 Composite EVM Slot 0 3Sltot 2 Result Summar Fig 10 2 Composite EVM of the WCDMA carrier The slots 1 2 8 and 9 show a much higher EVM than the other slots Analyze the EVM for the chips in these slots a Press the MEAS CONFIG key then select the Display Config softkey b Drag the EVM vs Chip button over the Result Summary beneath the Com posite EVM display to replace it C Select the red cross at the top of the result display list 2X to close the Smart Grid mode The EVM vs Chip results are displayed for slot 0 Take a closer look at slot 1 which had a high EVM a Select the Evaluation Range softkey and set the Slot to 7 Slot 1 is highlighted red in the Composite EVM display User Manual 1176 8574 02 06 66 R amp S9FPS MSRA Measurement Example Analyzing MSR Signals b Select the EVM vs Chip window to set the focus on it The EVM for the individual chips in slot 1 is displayed Note the
57. 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 FPS 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 Q Analyzer and thus in all applications in MSRA operating mode e GSM e VSA Remote command INPut FILTer YIG STATe on page 82 7 4 Amplitude The amplitude is configured in the Amplitude dialog box Amplitude settings are iden tical to the Signal and Spectrum Analyzer mode For background information on amplitude settings see the R amp S FPS User Manual 7 4 1 Amplitude Settings Amplitude settings determine how the R amp S FPS must process or display the expected input power levels 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 Input Frontend from the Overview and then switch to the Amplitude tab e Select the AMPT key and then the Amplitude Config softkey Reference T evel dici eere i tad ea a E A 36 L Shiiting the Display Dal ooo
58. cquisition softkey and set the Sample Rate to 1 MHz 4 Setthe Meas Time to 5 ms The I Q Analyzer obtains an extract of the data captured by the MSRA Master Which spectrum of the captured data is analyzed is indicated by vertical blue lines in the MSRA Master window see figure 10 1 To analyze the WCDMA signal Activate a measurement channel for the 3GPP FDD BTS application to analyze the WCDMA signal in more detail Now the second carrier is of interest 1 Press the MODE key and select the 3GPP FDD BTS button 2 Press the FREQ key and set the center frequency to 997 5 MHz The 3GPP FDD BTS application obtains an extract of the data captured by the MSRA Master 3 Select the MSRA View tab to see the captured data and the GSM and WCDMA results at once Which spectrum of the captured data is analyzed is indicated by vertical blue lines in the MSRA Master window MSRA View 22 MSRA Master IQ Analyzer 3G FDD BTS Ref Level 10 00 4 m MSRA Master TELC med 10 00 den TO Analyzer M maax 1 agrio Fig 10 1 MSRA View for I Q Analyzer and 3GPP FDD BTS applications User Manual 1176 8574 02 06 65 R amp S9FPS MSRA Measurement Example Analyzing MSR Signals 4 5 T Select the 3GPP FDD BTS tab to return to the detailed WCDMA results Display the composite EVM of the WCDMA carrier a Press the MEAS CONFIG key then select the Display Config softkey b Scroll through the result displ
59. criptions Note the following conventions used in the remote command descriptions Command usage 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 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 FPS 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 e 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 User Manual 1176 8574 02 06 71 Introduction If the result of a remote command can also be achieved in manual operation a link to the descript
60. cs chapter in the R amp S FPS 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 FPS is blocked for further commands In this case you must inter rupt 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 FPS on a parallel channel to clear all currently active remote channels Depending on the used interface and protocol send the following commands Visa viClear 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 Usage Event SCPI confirmed Capturing Data and Performing Sweeps INITiate lt n gt CONMeas This command restarts a single measurement that has been stopped using ABORt or finished in single sweep 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 d
61. ctivated option B160 I Q Bandwidth Extension 127 A 3 1 Bandwidth Extension Options Max usable I Q BW Required B option 40 MHz B40 160 MHz B160 A 3 2 Relationship Between Sample Rate Record Length and Usable I Q Bandwidth Up to the maximum bandwidth the following rule applies Sample Rate and Maximum Usable I Q Bandwidth for RF Input Usable I Q bandwidth 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 1 1 Maximum record length 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 upsampling The figure 1 2 shows the maximum usable I Q bandwidths depending on the output sample rates Sample Rate and Maximum Usable I Q Bandwidth for RF Input Usable I Q bandwidth 1 Q bandwidths for RF input 160 MHz Activated option B160 150 140 130 120 110 100 Option B40 or deactivated option B160 Without BW extension options Output sample 20 40 60 80 100 120 140 160 180 200 10000 rate fo MHz Fig 1 2 Relationship between maximum usable I Q bandwidth and output sample rate with and with out bandwidth exte
62. d event bit transitions to true a positive transition will occur in the summary bit reported to the next higher level Parameters lt SumBit gt Range 0 to 65535 lt ChannelName gt String containing the name of the channel The parameter is optional If you omit it the command works for the currently active channel Usage Query only STATus OPERation NTRansition lt SumBit gt lt ChannelName gt This command controls the Negative TRansition part of a register Setting a bit causes a 1 to O transition in the corresponding bit of the associated regis ter The transition also writes a 1 into the associated bit of the corresponding EVENt register Parameters lt SumBit gt Range 0 to 65535 lt ChannelName gt String containing the name of the channel The parameter is optional If you omit it the command works for the currently active channel Usage Query only STATus OPERation PTRansition lt SumBit gt lt ChannelName gt This command controls the Positive TRansition part of the register Setting a bit causes a 0 to 1 transition in the corresponding bit of the associated regis ter The transition also writes a 1 into the associated bit of the corresponding EVENt register Parameters lt SumBit gt Range 0 to 65535 11 8 11 9 Analyzing MSRA Measurements lt ChannelName gt String containing the name of the channel The parameter is optional If you omit it the command works for the currently active chann
63. da aaa 89 DIAGnostic SERVice NSOurce lt State gt This command turns the 28 V supply of the BNC connector labeled NOISE SOURCE CONTROL on the R amp S FPS on and off Parameters lt State gt ON OFF RST OFF Example DIAG SERV NSO ON Manual operation See Noise Source on page 53 11 4 2 O 11 4 2 1 Configuring MSRA Measurements Triggering The following remote commands are required to configure a triggered measurement in a remote environment These commands are only available for the MSRA Master channel More details are described for manual operation in chapter 7 6 Trigger Set tings on page 41 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 Configuring the Triggering GCOoDndItloriS iui ios pese esu nee aaa 90 e Configuring the Trigger Output nnne nnne 93 Configuring the Triggering Conditions TRIGE SEQuence l DTM m De 90 TRIGger SEQuence HOLDofff TIME cececeeeeeceeeeeeeeeeeee eee nennen ener nnn nnns 90 TRIGger SEQuence IFPowerHOLDOF coso raci n 91 TRIGger SEQuencel FPowerHYS Teresis iieri trn enean unu AIR e a ARBORI ATA 91 TRIGger SEQuenceJ LEVel EXTernal port esce 91 YRIGger SEQuence EEVellF POWGE caca ott aa 92 TRIGger SEQuence L EVellOPOWPLE 22 in tet eee erase e e
64. di s Auto level coimas atasca Displayed Sats OSO lisina aii DXeciMje were Unit Value Refreshing All applications softkey MSRA applications 23 51 MSRA applications remote sess 118 Resultdisplay civic rito 25 SOME nitrilo 51 Remote commands Basics ofi Syntax i e ret nere 70 Boolean values da CapitalizatiOli etre eerte Character data Data blocks Numeric values ertet re traint Optional KeyWOEFdS 1 2 ciet deterius 72 Paratti amp lers einer et p e Erie eden 73 A 75 A anai iada srauni eiai 72 Restoring Channel Settings siria eerte 33 Restrictions MSRA Applications iii dis 27 Results AMAlYZIAG arica da 58 Data format remote 32 0110 Display MSRA Master see 16 Retrieving remote 110 Updating the display enn 51 Updating the display remote ssssse 118 RF attenuation PU M 36 Manual exis in andria ae 36 suiit e 34 Remote ta ds 81 82 RF Power EI 43 Trigger level remote eee 92 RUN CONT ROY 52 RUN SINGLE ES E E AAA tetbebts 52 S Sample rate DENION e 123 Displayed sisi ata adios 12 A 47 Maximum issis 129
65. e This command starts a single new measurement You can synchronize to the end of the measurement with OPC OPC or WAI For details on synchronization see the Remote Basics chapter in the R amp S FPS User Manual Suffix n irrelevant Usage Event Manual operation See Single Sweep RUN SINGLE on page 52 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 107 To deactivate the Sequencer use SYSTem SEQuencer on page 109 Suffix lt n gt irrelevant Usage Event Manual operation See Sequencer State on page 23 INITiate lt n gt SEQuencer IMMediate This command starts a new sequence 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 109 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 Manual operation See Sequencer State on page 23 Capturing Data and Performing Sweeps INITiate lt n gt SEQuencer MODE Mode This command
66. e 1 to lt of samples gt lt offset samples gt with lt of samples gt maximum number of captured values RST lt of samples gt Return values lt IQData gt Measured value pair 1 Q for each sample that has been recor ded The data format depends on FORMat DATA Default unit V 11 7 11 7 1 Querying the Status Registers Example TRAC IQ STAT ON Enables acquisition of I Q 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 IQ DATA MEM Reads all 4096 I Q data TRAC IQ DATA MEM 0 2048 Reads 2048 Q data starting at the beginning of data acquisition TRAC IQ DATA MEM 2048 1024 Reads 1024 Q data from half of the recorded data TRAC IQ DATA MEM 100 512 Reads 512 Q data starting at the trigger point Pretrigger Samples was 100 Usage Query only Querying the Status Registers The R amp S FPS I Q Analyzer uses the standard status registers of the R amp S FPS The MSRA operating mode uses an additional bit in the STATus OPERation register This register and the commands required to query its contents are described here For details on the common R amp S FPS status registers refer to the description of remo
67. e 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 84 INPut ATTenuation AUTO on page 84 User Manual 1176 8574 02 06 36 Amplitude Using Electronic Attenuation If the optional Electronic Attenuation hardware is installed on the R amp S FPS you can also activate an electronic attenuator In Auto mode the settings are defined automatically in Manual mode you can define the mechanical and electronic attenuation separately Note Electronic attenuation is not available for stop frequencies or center frequencies in zero span gt 7 GHz In Auto mode RF attenuation is provided by the electronic attenuator as much as possible to reduce the amount of mechanical switching required Mechanical attenua tion may provide a better signal to noise ratio however When you switch off electronic attenuation the RF attenuation is automatically set to the same mode auto manual as the electronic attenuation was set to Thus the RF attenuation may be set to automatic mode and the full attenuation is provided by the mechanical attenuator if possible Both the electronic and the mechanical attenuation can be varied in 1 dB steps Other entries are rounded to the next lower integer value If the defined reference level cannot be set for the given attenuation the reference level is adjus
68. e dialog box select the AL icon in the toolbar only available in MSRA mode The current position of the analysis line is indicated on the icon Analysis Line a d POSO id LL cue lude 59 i gro BITTER PTT E 59 Configuring the Analysis Line Position Defines the position of the analysis line in the time domain The position must lie within the measurement time of the multistandard measurement Remote command CALCulate lt n gt MSRA ALINe VALue on page 118 Show Line Hides or displays the analysis line in the time based windows By default the line is displayed Note even if the analysis line display is off the indication whether or not the currently defined line position lies within the analysis interval of the active application remains in the window title bars Remote command CALCulate lt n gt MSRA ALINe SHOW on page 117 9 How to Perform Measurements in MSRA Mode The following step by step instructions demonstrate how to perform a measurement in MSRA mode How to capture I Q data in MSRA mode 1 Press the MODE key and select the MSRA operating mode Confirm the message 2 Select the Overview softkey to display the Overview for an MSRA measure ment 3 Select the Input button to select the 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
69. e R amp S FPS Multi Standard Radio Analyzer MSRA mode Multi Standard Radio Analyzer mode In Multi Standard Radio Analyzer MSRA mode data acquisition is performed once as an I Q measurement and the captured data is then evaluated by any number of applications for different radio standards Data acquisition and global configuration set tings are controlled globally while the evaluation and display settings can be config ured individually for each application Using the Multi Standard Radio Analyzer unwanted correlations between different signal components using different transmis sion standards can be detected Thus for example an irregularity in a GSM burst can be examined closer in the R amp S FPS 3G FDD BTS W CDMA application to reveal dependencies like a change in the EVM value Distinct operating modes Although the applications themselves are identical in all operating modes the handling of the data between applications is not Thus the operating mode determines which applications are available and active Whenever you change the operating mode the currently active measurement channels are closed The default operating mode is Sig nal and Spectrum Analyzer mode however the presetting can be changed User Manual 1176 8574 02 06 18 5 1 Available Applications Remote command INST MODE MSR see INSTrument MODE on page 79 Switching between applications When you switch to a new application a set of para
70. e 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 For details on the Sequencer see the R amp S FPS User Manual Remote command INITiate lt n gt CONTinuous on page 106 Single Sweep RUN SINGLE After triggering starts a single data acquisition If the Sequencer is off only the evalua tion for the currently displayed measurement channel is updated 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 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 FPS User
71. e trei Htec ret eet o e ode dl 116 SYSTem PRESet CHANnel EXECute 80 SV Stem PRESE COMPAD Gis cpics 80 SV STEM SEQUENCE p M 109 TRAC IQ BWIRE EUER 99 TRACSIO DATA FORMAL 112 TRAGO IQ DATA MEMOS cierras a ceda 112 TRACSIO DATA ii lis its 111 TRACe IQ RLENgth TRACES IQ SRAT e M TRAGe IQ TPISample rame ere hd b ER Pe HL aa 100 TRACSIO WBANd MBWIDTA TRAGe IQ IWBANGESTATS trente te tn te elec lg n t el ania eee d TRIGger SEQuence D TIMe iint irm rr irren Hh rer tort ia ran TRIGger SEQuerncebBObBofI TIME easi otra e ho ces an eser EAE rer Pd ce A TRIGger SEQuence IFPower HOLDoff TRIGger SEQuence IFPower HYS Teresis c ioter tr rere ren rere raaa eh Eee aan 91 TRIGO SEQUENCE HEV uz e M M EE 92 TRIGger SEQuerice EEVelIOPOWet rettet ree eren rer etr rere reete 92 TRIGger SEQuence LEVel RFPower 55 92 TRIGgerl SEQUencel LEVE EX Temal port isrener xen Raesent peru qeu erc open 91 TRIGger SEQuerice SLOP Ci oia rete tire en ea ete ner i Aas 92 TRIGge r SEQuence SOURCGe ir per deeper A AECE 93 Index Symbols Moor 90 1xEV DO BTS MSRA application co ante ira 21 3G FDD BTS MSRA ApplicatiOn socer aa 20 A Aborting S
72. easurements are not supported in MSRA mode For details see the R amp S FPS cdma2000 User Manual Remote command INST SEL BC2K see INSTrument SELect on page 79 Selecting the Operating Mode and Application 5 2 1xEV DO BTS The 1xEV DO BTS application requires an instrument equipped with the 1xEV DO BTS Measurements option R amp S FPS K84 This application provides test measure ments for 1xEV DO BTS downlink signals base station signals according to the test specification RF measurements are not supported in MSRA mode For details see the R amp S FPS 1xEV DO User Manual Remote command INST SEL BDO see INSTrument SELect on page 79 LTE DL The LTE Downlink application requires an instrument equipped with the LTE Downlink option R amp S FPS K100 or R amp S FPS K104 This application provides test measure ments for LTE downlink signals base station signals according to the test specifica tion Frequency sweep measurements are not supported in MSRA mode For details see the R amp S FPS LTE DL User Manual Remote command INST SEL LTE See INSTrument SELect on page 79 Selecting the Operating Mode and Application The default operating mode is Signal and Spectrum Analyzer mode however the pre setting can be changed See the Instrument Setup chapter in the R amp S FPS User Manual Both the operating mode and the application can be selected in the Mode dialog box which is d
73. ed 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 Half of each window overlaps the previous window in FFT calcu lation Usage SCPI confirmed Manual operation See Window Overlap on page 50 SENSe IQ FFT WINDow TYPE Function In the I Q 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 Configuring MSRA Measurements Example IQ FFT WIND TYPE GAUS Usage SCPI confirmed Manual operation See Window Function on page 49 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 A 3 Sam ple Rate and Maximum Usable I Q Bandwidth for RF Input on page 123 Manual operation See Analysis Bandwidth on page 48 TRACe IQ RLENgth lt NoOfSamples gt This command sets the record length for the acquired l Q 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 RST 1001 Example TRAC IQ RLEN 256 Manual operat
74. ee 93 OIG Off ocio Den edi Raetia en 45 A eme eh He peret 44 ou M 27 Offset SOflKGy 2 ici 44 OVWIDUL c eei Camere lis 45 53 Isermote control macia ci eren 90 Slope ies 45 92 SQUICO cut aan id oi 42 Status register 2113 Trigger level eot ea erts 44 External trigger remote sss 91 VO Power remote icono ll es 92 IF Power remote 92 RF Power remote 192 Trigger SOUFCe x ertt entrer retener 42 External 43 Free Run 43 l Q POWOLF aiii ade tected 44 IE POWOE curan ds 43 RE POWER su rhet etel dovete eios 43 U Units Reference level iii tots 36 Updating Isesult display ricos enr Result display remote iai Upper Level Hysteresis e rere Usable I Q bandwidth DOMINIO satis dec i edis 123 User fmantals citar teet ree etie 1 6 User sample rate Deo Pm 123 Ww Waiting for trigger Status register ae Pers eene iro exitos 113 Window title bar information sesseesseess 10 Windows GONTQUIINO sa s roe Siria eerie asi 33 Maximum number na ep todo ttai oai inet 75 Y Y axis fene m 38 Scaling VQ VeGtOr iris oti re ne tiet 39 ifie E EU 37
75. el Usage Query only STATus OPERation EVENt lt ChannelName gt This command queries the contents of the EVENt section of the status register A query deletes the contents of the EVENt section Query parameters lt ChannelName gt String containing the name of the channel The parameter is optional If you omit it the command works for the currently active channel Return values lt RegisterContents gt Range O to 32767 Usage Query only Analyzing MSRA Measurements The data that was captured by the MSRA Master can be analyzed in various different applications The analysis settings and functions available in MSRA mode are those described for the individual applications The MSRA Master is in effect an I Q Analyzer application and has the same analysis functions and settings See the R amp S FPS 1 Q Analyzer User Manual for a description of the analysis functions and settings available for the I Q Analyzer and thus the MSRA Master The commands required to configure the MSRA specific analysis line are described in chapter 11 9 Commands Specific to MSRA Applications on page 116 Commands Specific to MSRA Applications Most commands for the MSRA applications are identical to those described for the individual applications However some specific commands are available for the MSRA applications only Configuring the analysis interval The commands required to configure the application data extracts and analysis int
76. el for the specified trigger source For details on supported trigger levels see the data sheet Remote command TRIGger SEQuence LEVel EXTernal port on page 91 Drop Out Time Trigger Source Defines the time the input signal must stay below the trigger level before triggering again Remote command TRIGger SEQuence DTIMe on page 90 Trigger Offset Trigger Source Defines the time offset between the trigger event and the start of the sweep for the MSRA Master This setting is not available in MSRA application measurement channels For applica tions use the Capture Offset on page 50 instead offset gt 0 Start of the sweep is delayed offset 0 Sweep starts earlier pre trigger Maximum allowed range limited by the sweep time pretriggermax sweep time Remote command TRIGger SEQuence HOLDoff TIME on page 90 Hysteresis Trigger Source 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 Trigger Settings 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 page 91 Trigger Holdoff Trigger Source Defines the minimum time in seconds that must pass between tw
77. ement was completed successfully in MSRA operating mode and data is available for evaluation 10 Range completed This bit is set when a range in the sweep list has been completed if Stop after Range has been activated 11 14 Not used 15 This bit is always 0 11 7 2 Commands to Query the STATus OPERation Register The following commands are required to query the contents of the STATus STATus O STATus O STATus O STATus O STATus O OPERation register Platon CONDITION aa esee A t e ab xa ege 114 PERSON ENABIE iiir dad 115 PERati n NTIRAFSIHO 1 cci roter e erase oras i ysyracoipaP vina ee rh TRIB AR ITERE RUR AA 115 PERDON P TRAISIHO cai eee ett erede erede ee Ra cp RR ERR YID 115 A teet tette tte tenete te tette cs 116 STATus OPERation CONDition lt ChannelName gt This comand reads out the CONDition section of the status register Querying the Status Registers The command does not delete the contents of the EVENt section Query parameters lt ChannelName gt String containing the name of the channel The parameter is optional If you omit it the command works for the currently active channel Usage Query only STATus OPERation ENABle lt SumBit gt lt ChannelName gt This command controls the ENABle part of the register The ENABle part allows true conditions in the EVENt part of the status register to bere ported in the summary bit If a bit is 1 in the enable register and its associate
78. er vals vary depending on the application See the corresponding application manuals for details Commands Specific to MSRA Applications For the l Q Analyzer the commands are the same as those used to define the actual data acquisition see chapter 11 4 3 Configuring Data Acquisition on page 95 In MSRA application channels these commands define the analysis interval Be sure to select the correct measurement channel before executing these commands Useful commands for configuring the analysis interval described elsewhere e TRACe IQ SRATe on page 99 e TRACe IQ BWIDth on page 99 e TRACe IQ RLENgth on page 99 e SENSe SWEep TIME on page 109 Remote commands exclusive to MSRA applications The following commands are only available for MSRA application channels CALC iilatesinetIQ MOD c LEE 117 CAL Culate lt n gt MSRA ALINe SHOW c cccccseseceescecceesecesssseceaseceseaueceesececeneesseeeessaaees 117 CALCulate lt n gt MSRA ALINEe VALUE ccccececeeeeee eee ce cece nnne nnne nennen nennen nnns nnn nnn nn nn 118 CAL CGulatesmnMSRAWINDOWSHPESIMAL9 ttes ett etta ee eco tex ote ttis dinge 118 INITiate sp REPRESA AAA ei aene eoo ave ta dE aa 118 I SENSe IMSRA CAP Tuite OFF Sel occ paucae e reden nadeecee seaddaanceezaguareersssueeees 119 CALCulate lt n gt IQ MODE lt EvalMode gt This command defines whether the captured I Q data is evaluated directly or if it is converted via FFT
79. er Source Trigger Source No trigger source is considered Data acquisition is started manually or automatically and continues until stopped explicitely Remote command TRIG SOUR IMM see TRIGger SEQuence SOURce on page 93 External Trigger 1 2 Trigger Source Trigger Source Data acquisition starts when the TTL signal fed into the specified input connector meets or exceeds the specified trigger level See Trigger Level on page 44 Note The External Trigger 1 softkey automatically selects the trigger signal from the TRG IN connector For details see the Instrument Tour chapter in the R amp S FPS Getting Started manual External Trigger 1 Trigger signal from the TRG IN connector External Trigger 2 Trigger signal from the TRG AUX connector Remote command TRIG SOUR EXT TRIG SOUR EXT2 See TRIGger SEQuence SOURce on page 93 IF Power Trigger Source Trigger Source The R amp S FPS 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 For measurements on a fixed frequency e g zero span or I Q 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 refe
80. ers are available for the output signal Remote command OUTPut TRIGger lt port gt OTYPe on page 94 T T T T 1 Data Acquisition and Bandwidth Settings Level Output Type Trigger 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 94 Pulse Length Output Type Trigger 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 95 Send Trigger Output Type Trigger 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 95 Data Acquisition and Bandwidth Settings How data is to be acquired is configured in the Bandwidth dialog box Data ACQUISIMON LEE 46 E E oe O AEE T A 50 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 g
81. eseeeeeeeens 27 Measurements in the Time and Frequency Domain eene 28 CONTIQUIAN C 30 Default Settings for MSRA Measurements eeeeeneennnn nen 31 Configuration OverviQw necne eee r rne innen aan niano SANNE Ene ianua Ea no aua aano noua unn 32 Input Source SettidgS ioimnmiciiic nnne ene nnen e sein n anR S ERENNERT 33 Amplitude a re iiir Rd 35 Frequency Settings 22 ieri iinnn nnns n nn eto k uana soa s iu uu aS ERR ERRRRRR RR ERR RENTE 39 Trigger Settings eruta ose seve tte er 41 Data Acquisition and Bandwidth Settings seeeeennn 46 letitediunttme 53 Display ConfiguratioN omic ra ANARE Papa SRETNE EE 55 7 10 8 1 10 11 11 1 11 2 11 3 11 4 11 5 11 6 11 7 11 8 11 9 11 10 A 1 A 2 A 3 Automatic Settings iiic ce inni enr canada 55 A Ke M eee 58 Configuring the Analysis Line eese nennen nnns 58 How to Perform Measurements in MSRA Mode 60 Measurement Example Analyzing MSR Signals 63 Remote Commands to Perform Measurements in MSRA Mode 70 AAA nn nn 70 Common Sufflxes eterne ii YR Knina sa Niina 75 Activating MSRA Measurements eeeeeseeeeeeeeee eene
82. ey or in the Trigger dialog box which is displayed when you select the Trigger button in the Overview Trigger Source Trigger In Out Source Drop Out Time Offset Slope Rising Falling Hysteresis Holdoff External triggers from one of the TRIGGER INPUT OUTPUT connectors on the R amp S FPS are configured in a separate tab of the dialog box Trigger Settings Trigger Source Trigger In Out Trigger 2 Output Output Type User Defined Level Low Pulse Length 100 0 us Send Trigger JL Trigger 3 Input Output For step by step instructions on configuring triggered measurements see the R amp S FPS User Manual TDS SOWIE DE 42 DE Bc RERO ER 42 L Free eR NENNT cido o ioircon tico 43 E Edema Tagger V2 aliada 43 dod ME TTE 43 2 12 MMC T RIE 43 A nectit ers rete nde RON eaa bend inet Cicer 44 O MR HR 44 E Drop OUt A 44 RED d RET DO LT TM 44 Re BR cts E A EE A esate tatennae E E 44 E aro RII 45 Lio e MO P EE 45 TOII EET 45 aut oT A T 45 A 46 Bx 16 MT 46 L Send s ARMOR 46 Trigger Source The trigger settings define the beginning of a measurement Trigger Source Trigger Source Defines the trigger source If a trigger source other than Free Run is set TRG is displayed in the channel bar and the trigger source is indicated Remote command TRIGger SEQuence SOURce on page 93 Trigger Settings Free Run Trigg
83. frequency domain measurement is selected in the Select Measurement dialog box which is now displayed when you do one of the following e In the I Q Analyzer menu select the Select Meas softkey User Manual 1176 8574 02 06 30 Default Settings for MSRA Measurements Press the MEAS key The common measurements as in the Spectrum application are listed In addition IQ Analyzer is provided under Basic Measurements to return to the default I Q Analysis functions The time and frequency domain measurements and the required settings are descri bed in detail in the R amp S FPS User Manual Further configuration of the l Q Analyzer application is described in the R amp S FPS I Q Analyzer and l Q Input User Manual The following chapters describe configuration for the MSRA Master e Default Settings for MSRA Measurements essen 31 e Configuration OVIalVIgW once certa redet e E oce ritu re ee ed ec ele ee aude 32 e input Source Settings odi cere Receta gena ei E bee Eu EY 33 AMPIE ERE 35 Frequency SQUINGS E 39 e WMG GS SSCS co cog oce eme catene end ele ie dan a iene teed ne deter eat 41 e Data Acquisition and Bandwidth SettigS ooononcccnnnnnnnccccnnnonncccnnnannncnnnnana conan 46 QUIPUESCUINOS EE 53 Display Configuration cuca a A mer ts 55 e Automatico SOtInOS umiecinmosim a aa 55 7 1 Default Settings for MSRA Measurements The following defaul
84. frequency of 1 GHz 11 1 6 2 Introduction 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 applies 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 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
85. hannel information bar for the MSRA Master 2 Data coverage for each active application 3 Analysis line 4 Result display for MSRA Master for entire capture buffer Channel bar information The channel bar shows the firmware and measurement information for data acquisition and global configuration Table 2 1 Information displayed in the channel bar for the MSRA Master Ref Level Reference level m el Att Mechanical and electronic RF attenuation Ref Offset Reference level offset Freq Center frequency AQT Defined measurement time i e the duration of data acquisition to the cap ture buffer Rec Length Defined record length number of samples to capture SRate Defined sample rate for data acquisition RBW Spectrum evaluation only Resolution bandwidth calculated from the sample rate and record length SSS ae User Manual 1176 8574 02 06 12 R amp S9FPS MSRA Welcome to the MSRA Operating Mode 2 2 3 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 FPS Getting Started manual Data coverage for each active application Each application obtains an extract of the data captured by the MS
86. he Overview The Overview varies depending on the application for detailed descriptions see the corresponding application User Manual If the I Q Analyzer is used as an MSRA application the Overview also provides a measurement selection button in order to perform measurements in the frequency and time domain See the R amp S FPS I Q Analyzer and l Q Input User Manual for details The Overview for the MSRA Master provides quick access to the following configura tion dialog boxes listed in the recommended order of processing 1 Input settings See chapter 7 3 Input Source Settings on page 33 2 Amplitude settings See chapter 7 4 Amplitude on page 35 3 Frequency settings See chapter 7 5 Frequency Settings on page 39 7 3 Input Source Settings 4 Optionally trigger settings See chapter 7 6 Trigger Settings on page 41 5 Bandwidth settings See chapter 7 7 Data Acquisition and Bandwidth Settings on page 46 6 Optionally output settings See chapter 7 8 Output Settings on page 53 7 Analysis settings and functions See chapter 8 Analysis on page 58 8 Display configuration See chapter 7 9 Display Configuration on page 55 To configure settings gt Select any button to open the corresponding dialog box For step by step instructions on configuring MSRA measurements see chapter 9 How to Perform Measurements in MSRA Mode on page 60 Preset Channel Select the Preset
87. he R amp S FPS performs analysis on the captured data For measurements that require long measurement times and comprehensive analysis tasks using the capture finished information can reduce the overall measurement time significantly See also e INITiate lt n gt REFResh on page 118 Capturing Data and Performing Sweeps ADORA uua eee uetus ead e UE 105 INITiate sns CONMIaS tienen nina diana ETE enanas dia An 106 ING ate sms CONTINOUS iecore Lauer tenerse tu cre tnra aate seo aree na ro cresta a a 106 INL raten IMMediale coeur A nee n et aeneae en eo uh 107 INITiatesh SEOQUerncerABOBL 2 1 iaa Res ERI REPE 107 INITiate lt n gt SEQuencer lMMediate occcconnccccccnncconncncconnnnocnnnnnonnnnonnnnnnnnnnnnannnnnnnnnnnoneninns 107 INITiate lt n gt SEQuencer MODE occooccccccocnnccconnnnocnnnnonnnnnononnnnncnnnnnnnnnnnnnnnnnnonnnnonnnncnnnnnnnnins 108 INiTiate lt h gt SEQuencer REFResShEALO ion taria 108 SENSE S WES PONS oia 109 BENSe SWEGp TIME ccce tret tret bte datada iia cai 109 SYSTEM SEQUENCE 2 2 22 scicieaizedivestansniasscanceden vena dtudiowsastedaavasedidees AAEE EaR EN STON 109 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 WAT command after ABOR and before the next command For details see the Remote Basi
88. he 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 FPS 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 83 RF Attenuation Defines the attenuation applied to the RF input of the R amp S FPS Attenuation Mode Value RF Attenuation 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 By default and when Using Electronic Attenuation is not available mechanical attenua tion is applied 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 cannot 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 th
89. he cepe oaa 92 TRIGSer SEQuence E EVel REPOWEF eit rant erbe e ERR era cuneo eaa aene Re ERR x RE de 92 TRIGE SEQuenceLl SLOPE ii Enter ete E etr ceat eror tede vea enel cette bo ba cod tus 92 TRIGger SEQuence SO Roe ciii deese a dr eo cede a er o EZ 93 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 44 TRIGger SEQuence HOLDoff TIME Offset Defines the time offset between the trigger event and the start of the sweep Parameters Offset RST Os Example TRIG HOLD 500us Manual operation See Trigger Offset on page 44 Configuring MSRA Measurements TRIGger SEQuence IFPower HOLDoff Period This command defines the holding time before the next trigger event Note that this command can be used for any trigger source not just IF Power despite the legacy keyword 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 45 TRIGger SEQuence IFPower HYSTeresis lt Hysteresis gt This command defines the trigger hysteresis which is only available for IF Power trig ger
90. incnnnnicicinnnnncnnncnnnnocncncnncnnnnnnnns 116 e Programming Example Analyzing MSR Signals eese 119 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 R amp S FPS MSRA Remote Commands to Perform Measurements in MSRA Mode The syntax of a SCPI command consists of a 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 FPS Remote command examples Note that some remote command examples mentioned in this general introduction may not be supported by this particular application 11 1 1 Conventions used in Des
91. instrument func tions 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 FPS in general and the Spectrum application in particular Furthermore the soft ware functions that enhance the basic functionality for various applications are descri bed here An introduction to remote control is provided as well as information on main tenance 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 default settings and parame ters refer to the data sheets Basic information on operating the R amp S FPS is not inclu ded in the application manuals All user manuals are also available for download from the Rohde amp Schwarz website on the R amp S FPS product page at http www2 rohde schwarz com product FPS html 1 3 Typographical Conventions Service Manual This manual is available in PDF format on the Documentation CD ROM delivered with the instrument It describes how to check compliance with rated specifications instru ment function repair troubleshooting and fault elimination It contains all information required for repairing the R amp S FPS by replacing modules Release Notes The release notes describe the installation of the f
92. inubus Swe PRON CONT ttt tt dette te dr edere ee een ce rd de ete teda 52 single Sweep RUN SINGLE ceiiiec inais etri uer cerita eae 52 Conte SIngle SW encre tor na E re SERERE OUR arene I ERR Re 52 Sweep Points In the I Q 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 are 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 I Q 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 I Q 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 Using fewer than 4096 sweep points with a detector other than Auto Peak may lead to wrong level results Remote
93. ion See Record Length on page 48 TRACe IQ SRATe lt SampleRate gt This command sets the final user sample rate for the acquired I Q data Thus the user sample rate can be modified without affecting the actual data capturing settings on the R amp S FPS Note The smaller the user sample rate the smaller the usable l Q bandwidth see chapter A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input on page 123 In order to ensure a minimum usable I Q bandwidth use the TRACe 10 WBANd MBWIDTH on page 101 command Parameters lt SampleRate gt The valid sample rates are described in chapter A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input on page 123 Range 100 Hz to 10 GHz continuously adjustable RST 32 MHz Configuring MSRA Measurements Manual operation See Sample Rate on page 47 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 FPS 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 TIS sample trigger start event This value can only be determined in triggered measurements using external or IFPower triggers othe
94. ion is inserted 11 1 2 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 11 1 3 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 e g a mea surement window Numeric suffixes are indicated by angular brackets lt n gt next to the keyword 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 ONrefers to window 4 11 1 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 s
95. ion requires an instrument equipped with the corresponding optional software This application provides measurement functions for measuring GSM sig nals For details see the R amp S FPS GSM User Manual Remote command INST SEL GSM see INSTrument SELect on page 79 3G FDD BTS The 3G FDD BTS application requires an instrument equipped with the 3GPP Base Station Measurements option R amp S FPS K72 This application provides test measure ments for WCDMA downlink signals base station signals according to the test specifi cation RF measurements are not supported in MSRA mode For details see the R amp S FPS 3G FDD User Manual Remote command INST SEL BWCD see INSTrument SELect on page 79 TD SCDMA BTS The TD SCDMA BTS application requires an instrument equipped with the TD SCDMA BTS Measurements option R amp S FPS K82 This application provides test measure ments for TD SCDMA BTS downlink signals base station signals according to the test specification RF measurements are not supported in MSRA mode For details see the R amp S FPS TD SCDMA User Manual Remote command INST SEL BTDS see INSTrument SELect on page 79 cdma2000 BTS The cdma2000 BTS application requires an instrument equipped with the cdma2000 BTS Measurements option R amp S FPS K82 This application provides test measure ments for cdma2000 BTS downlink signals base station signals according to the test specification RF m
96. irmware 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 The most recent release notes are also available for download from the Rohde amp Schwarz website on the R amp S FPS product page at http www2 rohde schwarz com product FPS html gt Downloads gt Firmware 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 font References References to other parts of the documentation are enclosed by quota tion marks Starting the MSRA operating mode 2 Welcome to the MSRA Operating Mode The MSRA operating mode is part of the standard R amp S FPS firmware and adds func tionality to perform multi standard radio analysis The R amp S FPS MSRA operating mode features e analysis of the same l Q data in more than one application
97. is can be configured individually for each application and the Master Restrictions E Note that although some restrictions apply to parameters that affect both the MSRA Master and applications see chapter 6 4 Restrictions for Applications on page 27 it does not matter in which order you configure them If any contradictions occur between the captured data and the data to be evaluated error messages are displayed in the status bar of the application and an icon Ell or Bl is displayed next to the chan nel label However you will not be prevented from configuring contradictory settings Importing and Exporting I Q Data Note that as opposed to the Signal and Spectrum Analyzer mode the l Q data to be evaluated in MSRA mode cannot be imported to the R amp S FPS However the captured 1 Q data from the MSRA Master can be exported for further analysis in external appli cations For details on exporting I Q data see the R amp S FPS I Q Analyzer User Manual Configuring an l Q Analyzer as an MSRA application In principle the I Q Analyzer in MSRA mode is configured as in Signal and Spectrum Analyzer mode However the I Q Analyzer application not Master in MSRA mode can also perform measurements on the captured l Q data in the time and frequency domain see also chapter 6 5 Measurements in the Time and Frequency Domain on page 28 Which type of measurement is to be performed conventional I Q data analysis or a time or
98. is command is only available in application measurement channels not the MSRA View or MSRA Master Return values lt IntStart gt Start value of the analysis interval in seconds Default unit s lt IntStop gt Stop value of the analysis interval in seconds Usage Query only INITiate lt n gt REFResh This function is only available if the Sequencer is deactivated SYSTem SEQuencer SYST SEQ OFF and only for applications in MSRA mode not the MSRA Master The data in the capture buffer is re evaluated by the currently active application only The results for any other applications remain unchanged The application channel must be selected before this command can be executed see INSTrument SELect on page 79 The suffix lt n gt is irrelevant 11 10 Programming Example Analyzing MSR Signals 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 INST SEL IQ ANALYZER Selects the IQ Analyzer channel INIT REFR Refreshes the display for the I Q Analyzer channel Usage Event Manual operation See Refresh on page 51 SENSe MSRA CAPTure OFFSet Offset This setting is only available for applications in MSRA mode not for the MSRA Master It has a similar effect as the trigger offset in other measurements Parameters Offset This parameter defines the time offset between
99. is is necessary in order to evaluate the same data in different applications without overwriting the data in the capture buffer In single sweep mode only one sweep is performed a sweep count is not available neither for the MSRA Master nor for the applications However depending on the application a statistics count may be available for statistics based on a single data acquisition Trace averaging is performed as usual for sweep count 0 the current trace is averaged with the previously stored averaged trace Data availability The applications can only receive data that is available in the capture buffer As soon as data has been stored to the capture buffer successfully a status bit 9 in the STAT OPER register is set If the required application data is not available an error message is displayed Details on restrictions are described in chapter 6 4 Restrictions for Applications on page 27 User Manual 1176 8574 02 06 25 R amp S9FPS MSRA MSRA Basics 6 3 Multi Standard Analysis Application data The applications receive data for analysis from the capture buffer if necessary resam pled or with filters applied The applications can define their own center frequency sample rate and record length for their application data which is an extract of the capture buffer data The applications may not request more sample points than the captured data contains or samples from a frequency outside the range of the cap
100. isplay for the individual MSRA applications is identical to the display in Signal and Spectrum Analyzer mode except for the following differences The analysis interval indicates which part of the capture buffer is being evaluated and displayed in each window The acquisition time indicated in the channel bar Meas Time indicates the ana lyzed measurement time not the captured time e Any bandwidth or sample rate values refer to the application data not to the actual data acquisition from the input signal e The analysis line for time based displays is only available in MSRA mode It repre sents a common time marker in all applications whose analysis interval includes that time see Analysis line on page 27 For details on the individual application displays see the corresponding User Manuals for those applications 3 Typical Applications The technological advances made in the field of mobile radio have given rise to a wide variety of standards over the past several decades These standards which include those produced by the global cooperative for standardization the 3rd Generation Partnership Project 3GPP are based on various transmission technologies Net work operators can deploy GSM EDGE WCDMA TD SCDMA and LTE or combina tions of these four standards To handle these complex scenarios the Multistandard Radio Base Station MSR BS was developed These can transmit and receive multiple standards simultaneously o
101. isplayed when you press the MODE key Signal Spectrum Analyzer Multi Standard Radio Analyzer New Channel RY Y NI Demod IQ E e aub BTS Replace Current pO Channel 3G FDD BTS 5 3 Using the Sequencer in MSRA Mode To switch the operating mode select the corresponding tab see chapter 2 1 Starting the MSRA operating mode on page 8 To select an application select the corresponding button To deactivate a channel simply close the corresponding tab The remote commands required to perform these tasks are described in chapter 11 3 Activating MSRA Measurements on page 76 New Ghianhel ecco n ER ERES NENREE EYE SERE Ne EN E RSNAEER SEXE GENER ARXRS AN EnxER E 22 Replace Gutrent CSI tco tto uo Lee rl enata el NEP a 22 New Channel The applications selected on this tab are started in a new channel i e a new tab in the display Remote command INSTrument CREate NEW on page 76 INSTrument SELect on page 79 Replace Current Channel The applications selected on this tab are started in the currently displayed channel replacing the current application Remote command INSTrument CREate REPLace on page 77 Using the Sequencer in MSRA Mode When you switch to MSRA mode the Sequencer is automatically activated in continu ous mode Unless it is stopped or you select a different Sequencer mode the R amp S FPS will continuously perform a data acquisition MSRA Master then eval
102. l operation See Range on page 38 See Y Axis Max on page 39 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 11 4 1 3 Configuring MSRA Measurements Parameters Mode ABSolute absolute scaling of the y axis RELative relative scaling of the y axis RST ABSolute Example DISP TRAC Y MODE REL Manual operation See Scaling on page 38 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 irrelevant The R amp S FPS adjusts the scaling of the y axis accordingly Example DISP TRAC Y RPOS 50PCT Usage SCPI confirmed Manual operation See Ref Level Position on page 38 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 t is irrelevant Parameters lt ScalingType gt LOGarithmic Logarithmic scaling LiNear Linear scaling in LDB Linear scaling in the specified unit PERCent Linear scaling
103. l traces lt t gt is irrelevant Example DISP TRAC Y RLEV 60dBm Usage SCPI confirmed Manual operation See Reference Level on page 36 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel OFFSet Offset This command defines a reference level offset for all traces t is irrelevant Configuring MSRA Measurements Parameters Offset Range 200 dB to 200 dB RST OdB Example DISP TRAC Y RLEV OFFS 10dB Manual operation See Shifting the Display Offset on page 36 Configuring the Attenuation INPUbATTeRnballof ri a xe den nee RR A cree dee dada 84 INPPUEEATTer ationtAL TO iii eoo a i eco ade semp PpsP TI DR DAP PRDS SRI P PR RN 22S RENT 84 ludas P 85 INPUEEATT AUTO P id aaa 85 INPUEEATTSTATS airis ido E 85 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 5dB 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
104. le format description s sisien 122 Maximum bandwidth E Measurements in time and frequency domain 28 Sample rate rettet Peers 123 Trigger point in sample TPIS sssse 100 1 Q Power Mica O Trigger level remote 1 Q Vector Y AXIS SCAN riii p een ei 39 IF Power A O 43 Trigger level remote see 92 Impedance occ 82 fuu 34 Input COUPLING vecindario nae tas 34 Coupling remote ree ires 81 Settings cuidat 93 37 Source Configuration softkey ua OD Source Radio frequency RF s es 34 Input sample rate ISR DEFINI 2 tirer eet eene deus 123 Input settings cio d 81 IQBlock l Q datailes vic te teet 122 IQPair VQ data files cep ete lacada 122 K Keys LINES not used dui 30 RUN CONT Sevilla rte E teat 52 RUN SINGLE tiir ri Eae e RI Ee 52 L Lower Level Hysteresis siseosas rta at 57 M Measurement channel Creating remote sess Deleting femote ocior nci tentes Duplicating remote eene Querying remote Renaming remote Replacing remote m Selecting remote eerte inerenti Measurement examples MSRAMOde suecia ee cte eme dais 63 Measurement time Auto Setllrigs eorr tra 56 1 Q data REMOTO isc iii ile M 109 Measurements Activating remote
105. lect the MSRA View to get an overview of the captured data and the configured applications Determine the individual data ranges that are relevant for a specific standard If necessary adapt the application data and analysis interval settings for the applica tions to reflect the relevant data ranges 4 If the results indicate that dependencies between different standards in the signal may exist a Select the application in which unusual data occurs b If necessary perform a new data acquisition c Determine the bandwidth or measurement time of the unusual data d Select the MSRA View to compare the data with the other standard applica tions If a specific event e g a burst spur etc occurs in another standard at the same time as the unusual data in the first application the two effects may be correlated e Select the possibly dependant standard application f Define an analysis interval for the conspicuous data range as described in How to analyze the captured l Q data in MSRA applications on page 61 g Refresh the result display for the changed analysis interval Sweep menu Now you can analyze the data in detail to determine the cause of the unusual sig nal behavior How to perform a measurement in the time or frequency domain in MSRA mode 1 Capture l Q data with the MSRA Master as described in How to capture l Q data in MSRA mode on page 60 2 Activate an I Q Analyzer channel as an MSRA application a
106. length corresponds to the Record Length on page 48 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 Remote command SENSe IQ FFT WINDow LENGth on page 98 Capture Offset This setting is only available for applications in MSRA operating mode It has a similar effect as the trigger offset in other measurements it defines the time offset between the capture buffer start and the start of the extracted application data In MSRA mode the offset must be a positive value as the capture buffer starts at the trigger time 0 For more information see Trigger offset vs capture offset on page 27 Remote command SENSe MSRA CAPTure OFFSet on page 119 Sweep Settings The sweep settings are configured via the SWEEP key or in the Sweep tab of the Bandwidth dialog box Data Acquisition Sweep Sweep Count Data Acquisition and Bandwidth Settings P 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 Selectthe SWEEP key and then the Sweep Config softkey For background information on performing sweeps in MSRA mode see chapter 6 2 Data Acquisition on page 25 i some MY 51 ROMS oreet merit Er eere tutepa en eir scp el tt 51 Gont
107. 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 I Q Analyzer is set to IQ Vector or Real Imag Remote command DISPlay WINDow lt n gt TRACe lt t gt Y SCALe on page 86 7 5 Frequency Settings 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 e Select Frequency from the Overview Frequency Settings Stepsize Frequency Offset Value 0 0 Hz uci iii ered 40 Canter Frequency 9Itepsiza eor rn ERR id 40 Frequency Offset eessssssssssssssesessse essen enne nnn senken inesset tennis sten 40 Center frequency Defines the normal center frequency of the signal fmax and SPAN in depend on the instrument and are specified in the data sheet Remote command SENSe FREQuency CENTer on page 88 Center Frequency Stepsize Defines the step size by which the center frequency is increased or decreased when the arrow keys are pressed 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
108. lt Displays M Y YO veq e gM peg fuquem qu MSRA View EE MSRA Master 36 FOO BTS Ref Le SRate MSRA Master Raw 1 Spectrum CF 1 0 GHz 1001 pts 10 0 M i Raf Level m Rent 1 Chanel 0 256 Ra TQ Analyzer age dB SWI 69 7242 s VBW Auto FF IGFOD BTS ae CPICH Slot O SymbRate 1 Frequency Sweep Code Domain Power A a Ans HERE Analy CF 1 0 GHz 1001 pts 25 Span 25 7 M 2Marker Table Type Stimulus M 1 onse dam wae Pile Poni 63 dBm Ref Level J TQ Analyzer pre pem 1ACLR CF 1 0 GHz 55 MHz Span 25 5 MHz 2 Resuk Summary W CDMA 3GPP DL Ba a 2 0 ms CF 1 0 GHz 1001 pts 2 Result Summary Range Low Power Rel o MA 67 50 dB Channel ower 41 Ref 10 70 dBm Tx Total 10 70 dBm Channel Lower Upper Time and frequency based measurements are configured using the same settings and provide similar results as in the Spectrum application In addition the analysis interval used for the measurement is indicated as in all MSRA applications The time and frequency domain measurements and the available results are described in detail in the R amp S FPS User Manual SSS E AAA User Manual 1176 8574 02 06 17 R amp S FPS MSRA Applications and Operating Modes 5 Applications and Operating Modes The R amp S FPS provides several applications for different analysis tasks and different types of signals e g W CDMA l Q analysis or basic spectrum analysis When
109. lts TRACe IQ DATA FORMat Format This command selects the order of the I Q data For details see chapter A 1 Reference Format Description for l Q Data Files on page 122 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 1 Q 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 l Q data currently stored in the memory of the R amp S FPS By default the command returns all 1 Q data in the memory You can however narrow down the amount of data that the command returns using the optional parameters Parameters lt OffsetSamples gt 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 lt of samples 1 with lt of samples being the maximum number of captured values RST 0 lt NoOfSamples gt Number of samples you want to query beginning at the offset you have defined If omitted all captured samples starting at offset are output Rang
110. ment MODE lt OpMode gt The operating mode of the R amp S FPS determines which applications are available and active Whenever you change the operating mode the currently active measurement channels are stored The default operating mode is Signal and Spectrum Analyzer mode however the presetting can be changed Parameters lt OpMode gt SANalyzer Signal and Spectrum Analyzer mode MSRanalyzer Multi Standard Radio Analysis MSRA mode RST SAN Example INST MODE MSR Switches to MSRA mode Usage SCPI confirmed 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 Spectrum2 Spectrum3 Renames the channel with the name Spectrum2 to Spectrum3 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 Also see INSTrument CREate NEW on page 76 Parameters lt ChannelType gt Channel type of the new channel For a list of available channel types see INSTrument LIST on page 78 lt ChannelName gt String contai
111. ments in the I Q Analyzer If not enough samples are available in the captured and converted l Q data for example an error message is dis played in the application The maximum resolution bandwidth RBW is 1 MHz Furthermore the following functions are not available for time and frequency domain measurements in multistandard mode Marker demodulation Frequency counter marker e Gated measurement e Video trigger R amp S FPS MSRA Configuration 7 Configuration MSRA is a special operating mode on the R amp S FPS which you activate using the MODE key When you switch the operating mode of a measurement channel to MSRA mode the first time the Sequencer is automatically activated in continuous mode see chap ter 5 3 Using the Sequencer in MSRA Mode on page 22 starting an I Q Analyzer data acquisition with the default settings but with a Spectrum result display The I Q Analyzer menu is displayed providing access to the most important configuration functions Configuring the MSRA Master The MSRA Master is the only channel that captures data It also controls global config uration settings for all applications Thus all settings that refer to data acquisition can only be configured in the MSRA Master tab These settings are deactivated in the con figuration overviews and dialog boxes for all application channels All other settings e g concerning the evaluated data range the display configuration or analys
112. meters is passed on from the cur rent application to the new one center frequency and frequency offset reference level and reference level offset attenuation 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 Available Applications The R amp S FPS provides some applications in the base unit while others are available only if the corresponding firmware options are installed Currently only applications for base station tests and those that process l Q data are supported in MSRA mode in particular e Q Analyzer e Analog Demodulation e GSM e 3GFDDBTS e TD SCDMA BTS e cdma2000 BTS e 1xEV DO BTS e WLAN e Vector Signal Analysis VSA e LTE Downlink Hey ol 19 i 20 SG FDD BTS TO 20 TO SCDMA BTS oa 20 E A NEE E BR d 20 TKEV DO BITS ceci eee tee ecc ad a e cn d Ce a 21 ETE me 21 l Q Analyzer The I Q Analyzer application provides measurement and display functions for digital 1 Q signals Evaluation of the captured I Q data in the frequency and time domain is also possible Available Applications For details see the R amp S FPS I Q Analyzer User Manual Remote command INST SEL IQ see INSTrument SELect on page 79 GSM The GSM applicat
113. n INST CRE BWCD 3GPP FDD BTS Set initial center frequency FREQ CENT 997 5MHz Select Composite EVM vs slot in Window 1 EVM vs Chip in Window 3 Result Summary remains in Window 2 as default LAY REPL WIND 1 CEVM LAY ADD WIND 2 BEL EVMC Result new window is 5 Meas all tabs with synchronisation in MSRA mode INIT SEQ IMM OPC Retrieve Results of IQ Analyzer INST SEL IQ Analyzer Check for Rising edge CALCulate MARKer X 1 14ms CALCulate MARKer Y Programming Example Analyzing MSR Signals CALCulate MARKer X 1 156ms CALCulate MARKer Y Retrieve Results from WCMDA INST SEL 3GPP FDD BTS Retrieve Composite EVM results TRAC1 DATA TRACel Select Slot No 1 CDP SLOT 1 Search Peak value of Marker in EVM vs Chip CALC5 MARK1 ON CALC5 MARK1 MAX PEAK Retrieve Chip and max EVM value CALC5 MARK1 X Y Reference Format Description for I Q Data Files A Annex A 1 Reference Format Description for I Q Data Files This section describes how l Q data is transferred to the memory during remote control see TRACe 10 DATA FORMat on page 112 command For details on the format of the individual values see chapter A 2 Formats for Returned Values ASCII Format and Binary Format on page 123 For details on the format of I Q export files using the I Q Export function see the R amp S FPS User Manual COMPatible IQBLock IQPair mode I Data 0 I Data 1 Q Data 1
114. n various carriers An MSR BS combines at least two different radio access technologies RAT Specifications and Tests 3GPP has published the specifications TS 37 141 and TS 37 104 for multistandard base stations The latter describes the minimum requirements for multistandard base stations in terms of RF requirements for the downlink and uplink TS 37 141 defines the tests and test requirements for the MSR BS based on these RF requirements To allow for efficient MSR BS testing TS 37 141 includes test configurations The goal of these test configurations is to significantly reduce the complexity of the many possi ble test scenarios They are limited to the worst case scenarios with the strictest crite ria Thus for example a test configuration is provided for receiver tests in which two signals a GSM carrier and an LTE carrier with a BWcnannei 5 MHz are positioned at the lower and upper edge of BW while maintaining Fortserrar This allows receiver tests to be performed with a configuration that fully utilizes the maximum bandwidth BWee of the MSR BS MSR BS Testing using R amp S FPS Multi Standard Radio Analysis The newly introduced R amp S FPS MSRA mode allows you to capture signals from a mul tistandard base station and analyze the same data in various standard applications 4 Measurements and Result Displays MSRA measurement The only true measurement in MSRA mode in which l Q data from the input signal is captured and sto
115. ncluding several graphical diagrams marker tables or peak lists For a description of the available evaluation methods see the Measurements and Result Displays topic of the corresponding application User Manual Automatic Settings Some settings can be adjusted by the R amp S FPS automatically according to the current measurement settings 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 Settings related to data acquisition measurement time hysteresis can only be adjus ted in the MSRA Master not in the applications Adjusting all Determinable Settings Automatically Auto All 55 Adjusting the Center Frequency Automatically Auto Freq sess 55 Setting the Reference Level Automatically Auto Level eeseessses 56 Resetting the Automatic Measurement Time Meastime Auto 56 Changing the Automatic Measurement Time Meastime Manual 56 Upper Level FIVSIGEGSIS crei ete nre e ar eene edat D ate aded eet ended 56 Lower Level HySIeresis t et De N ER RI Dan pari Diu cr pYTU ERR ERR n RER 57 Adjusting all Determinable Settings Automatically Auto AII Activates all automatic adjustment functions for the current measurement settings This includes e
116. net rentre nennt rrr enters 86 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe AUTO ONCE 86 DISPlay WINDow n TRACe t Y SCALe MODE sees enne nennen nennen nnne 86 DISPlay WINDow n TRACe t Y SCALe RLEVel eeseesseeeeeeesene eene nnne nennen nnn 83 DISPlay WINDow n TRACe t Y SCALe RLEVel OFFSet sse 83 DISPlay WINDow n TRACe t Y SCALe RPOSition eese enn 87 FORMA DATA A iii ein ens aie 110 INITiate lt m gt GONMEAS css ccs cecceeccaneecdeceta 106 INI Tiatesns CONTIBUOUS cota et eek het tr aia 106 hiciste ET M 118 INITiatesi SEQuerncer ABORLU rette ar enn eren re te n Cii Ee rer te Ene 107 INI Tiatesns SEQuericerIMMediate cce i ere nth rhe coget aa 107 INITiate lt n gt SEQuencer MODE 108 INITiatesi SEQuencerREFResh ALL iret erit ei nh n eet etre treten 108 INI TiatesnspIMMediatel ns ia 107 INPut AT TLeritiatiOn enr herren re e eee rr chu d na e E REX HE ATE RR E FUE S EE EHE ETAS 84 INPut ATTenuation AUTO i irit rer trt ntn ert a Pre en cuu ERN dias 84 jezmaeel m 81 INPUEDRA TD coi UR M M EIS 81 INPut EATT INPutEAT TAUITO araneon menen tee n ct ista ame Le a ener Di o dre EUR eds HEAD i e
117. ng MSRA Measurements 11 4 Configuring MSRA Measurements e Configuring Input Output and Frontend Settings ccconcccnnnnnnnccannnnnanannnnnonanonos 81 A LE 90 e Configuring Data AGQuisltlO r uds oe ett td de rr e gd ctu 95 e Adjusting Settings Automatically e eret eter to ced Eur sere te roe PES 101 11 4 4 Configuring Input Output and Frontend Settings The following commands are required to define input output and frontend settings Any settings related to data acquisition or data output are only available for the MSRA Mas ter e RE DUN eain ie o ete E erii i oia 81 e Configuring the Vertical Axis Amplitude Scaling sessssessss 83 LEE SOC TRIES 87 e Qotnfigutng the OVIS oci torre re AAA eie ores 89 11 4 1 1 RF Input NPU COUPA E P 81 INPUEDPA Tis a Eee p usn ceux ciu tea deve queen reatu exque Rina ce tone sE aa 81 l aide H1 un T 82 INPUEIMPeSAFIBB ire terc e eoa ce adt eb b o aco aei tiated 82 NPU SELEG PP 82 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 34 INPut DPATh State Enables or disables the use of the direct
118. ning the name of the channel Activating MSRA Measurements Example INST IQ Activates a measurement channel for the I Q Analyzer applica tion evaluation mode INST MyIQSpectrum Selects the measurement channel named MylQSpectrum for example before executing further commands for that channel Usage SCPI confirmed Manual operation See Q Analyzer on page 19 See GSM on page 20 See 3G FDD BTS on page 20 See TD SCDMA BTS on page 20 See cdma2000 BTS on page 20 See 1xEV DO BTS on page 21 See LTE DL on page 21 See New Channel on page 22 SYSTem PRESet COMPatible lt OpMode gt This command defines the operating mode that is activated when you switch on the R amp S FPS or press the PRESET key For details on operating modes see chapter 5 Applications and Operating Modes on page 18 Parameters lt OpMode gt SANalyzer Default Defines Signal and Spectrum Analyzer operating mode as the presetting MSRA Defines Multi Standard Radio Analysis MSRA as the preset default operating mode RST SAN Usage Event SYSTem PRESet CHANnel EXECute 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 33 Configuri
119. nnne nnne nennen 76 Configuring MSRA Measurements eese nnne nennen nnn nnns 81 Capturing Data and Performing Sweeps eene nennen 104 Retrieving Results coerente rente ste cs seascteecesaacteedessasteessssassetees 110 Querying the Status RegiSterS ooonnccccinnnncccncnnnsrncnrnccr cnn nene cnn 113 Analyzing MSRA Measureme ntts cccccecseecceeeeeeeeeeeeeeeeeeeeeeeenneeeseseeanseeeeseeaeeeeeenaes 116 Commands Specific to MSRA ApplicatiONS ooooocccnnnoncccnnononnncncrnnnnnnnnrnnnnnnnnnrnnnnns 116 Programming Example Analyzing MSR Signals eee 119 Ane A MREDUR IR MEri NEUE 122 Reference Format Description for l Q Data Files eesseeeeess 122 Formats for Returned Values ASCII Format and Binary Format 123 Sample Rate and Maximum Usable l Q Bandwidth for RF Input 123 List of Remote Commands MSRA eene 128 j c 130 About this Manual 1 Preface 1 1 About this Manual This R amp S FPS MSRA User Manual provides all the information specific to the operat ing mode All general instrument functions and settings common to all applications and operating modes are described in the main R amp S FPS User Manual The main focus in this manual is on the measurement results and the tasks required to obtain them
120. nsions A 3 3 R amp S FPS without additional bandwidth extension options sample rate 100 Hz 10 GHz maximum bandwidth 28 MHz Sample rate Maximum l Q bandwidth 100 Hz to 35 MHz proportional up to maximum 28 MHz 35 MHz to 10 GHz 28 MHz Sample Rate and Maximum Usable l Q Bandwidth for RF Input A 3 4 R amp S FPS with option B40 I Q Bandwidth Extension sample rate 100 Hz 10 GHz maximum bandwidth 40 MHz Sample rate Maximum I Q bandwidth 100 Hz to 50 MHz proportional up to maximum 40 MHz 50 MHz to 10 GHz 40 MHz A 3 5 R amp S FPS with activated option B160 I Q Bandwidth Extension sample rate 100 Hz 10 GHz maximum bandwidth 160 MHz Sample rate Maximum I Q bandwidth 100 Hz to 200 MHz proportional up to maximum 160 MHz 200 MHz to 10 GHz 160 MHz Restrictions The optional bandwidth extension R amp S FPS B160 can not be activated if any of the fol lowing conditions apply e R amp S FPS firmware versions previous to 1 20 e For center frequencies larger than 7 GHz e With any trigger except for an external trigger List of Remote Commands MSRA SENSO JADJUSCAL E ARS Aa 102 SENSe JADJust GONFigure DUR Ati cuina A a 102 SENSe ADJust CONFigure DURation MODE 5 2 non iii 102 SENSe ADJust CONFigure HYS Teresis LOWer once netter rn dt a rh Rena Ernie 103 SENSe JADJust CONFigure HYSTeresis UP Periana i 104 SENSe ADJu
121. ntial measurement is started immediately OFF 0 The Sequencer is deactivated Any running sequential measure 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 Manual operation See Sequencer State on page 23 11 6 Retrieving Results The measurement results are output in the form of a list three different formats can be selected for this list see TRACe 10 DATA FORMat on page 112 For details on formats refer to chapter A 1 Reference Format Description for I Q Data Files on page 122 as data has been stored to the capture buffer successfully a status bit 9 in the STAT OPER register is set see chapter 11 7 1 STATus OPERation Register on page 113 o The applications can only receive data that is available in the capture buffer As soon ae TT Ina ar nai ii deidad 110 TRAC SO DATAT E 111 TRACGIGUDATASFORMal 2 itte tee r sis ta 112 TRAGCEIOIDATAMEMOLEy rere ii 112 FORMat DATA Format This command selects the data format that is used for transmission of trace data from the R amp S FPS to the controlling computer Note that the command has no effect for data that you send to the R amp S FPS The
122. o trigger events Trigger events that occur during the holdoff time are ignored Remote command TRIGger SEQuence IFPower HOLDoff on page 91 Slope Trigger Source 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 92 Trigger 2 Defines the usage of the variable TRIGGER AUX connector on the rear panel Trigger 1 is INPUT only Note Providing trigger signals as output is described in detail in the R amp S FPS User Manual Input The signal at the connector is used as an external trigger source by the R amp S FPS No further trigger parameters are available for the con nector Output The R amp S FPS 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 94 OUTPut TRIGger lt port gt DIRection on page 94 Output Type Trigger 2 Type of signal to be sent to the output Device Trig Default Sends a trigger when the R amp S FPS triggers gered Trigger Sends a high level trigger when the R amp S FPS is in Ready for trig Armed ger state This state is indicated by a status bit in the STATus OPERation reg ister bit 5 User Defined Sends a trigger when user selects Send Trigger button In this case further paramet
123. oes 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 52 INITiate lt n gt CONTinuous lt State gt This command controls the sweep mode for an individual measurement channel Note that in single sweep mode you can synchronize to the end of the measurement with OPC OPC or WAI In continuous sweep mode synchronization to the end of the measurement is not possible Thus it is not recommended that you use continuous sweep mode in remote control as results like trace data or markers are only valid after a single sweep end synchronization For details on synchronization see the Remote Basics chapter in the R amp S FPS User Manual If the sweep mode is changed for a measurement channel while the Sequencer is active see INITiate n SEQuencer IMMediate on page 107 the mode is only considered the next time the measurement in that channel is activated by the Sequencer Suffix n irrelevant Parameters State ON OFF 0 1 ON 1 Continuous sweep OFF 0 Single sweep RST 0 Example INIT CONT OFF Switches the sweep mode to single sweep INIT CONT ON Switches the sweep mode to continuous sweep Manual operation See Continuous Sweep RUN CONT on page 52 Capturing Data and Performing Sweeps INITiate lt n gt MMediat
124. on See New Channel on page 22 INSTrument CREate REPLace lt ChannelName1 gt lt ChannelType gt lt ChannelName2 gt This command replaces a measurement channel with another one Setting parameters ChannelName1 String containing the name of the measurement channel you want to replace lt ChannelType gt Channel type of the new channel For a list of available channel types see INSTrument LIST on page 78 lt ChannelName2 gt 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 78 Example INST CRE REPL Spectrum2 IQ IQAnalyzer Replaces the channel named Spectrum2 by a new measure ment channel of type IQ Analyzer named IQAnalyzer Usage Setting only Manual operation See Replace Current Channel on page 22 INSTrument DELete lt ChannelName gt This command deletes a measurement channel If you delete the last measurement channel the default Spectrum channel is activa ted Parameters lt ChannelName gt String containing the name of the channel you want to delete A measurement channel must exist in order to be able delete it Example INST DEL Spectrum4 Deletes the channel with the name Spectrum4 Usage Event Activating MSRA Measurements INSTrument LIST This command queries all active measurement channels
125. on See Trigger 2 on page 45 OUTPut TRIGger lt port gt LEVel lt Level gt 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 OUTPut TRIGgereport 0TYPe Suffix port Selects the trigger port to which the output is sent 2 TRG AUX Parameters lt Level gt HIGH TTL signal LOW OV RST LOW Manual operation See Trigger 2 on page 45 See Level on page 46 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 TRG AUX 11 4 3 Configuring MSRA Measurements Parameters lt OutputType gt DEVice Sends a trigger signal when the R amp S FPS 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 45 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 TRG AUX Usage Event Manual operation See Send Trigger on page 46 OUTPut TRIGger lt port gt PULSe LENGth lt Length gt
126. on page 56 SENSe ADJust FREQuency This command sets the center frequency to the frequency with the highest signal level in the current frequency range At the same time the optimal reference level is also set see SENSe ADJust LEVel on page 104 Example ADJ FREQ Usage Event Manual operation See Adjusting the Center Frequency Automatically Auto Freq on page 55 SENSe ADJust CONFigure HYSTeresis LOWer Threshold When the reference level is adjusted automatically using the SENSe ADJust LEVel on page 104 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 This setting can only be adjusted in the MSRA Master not in the applications 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 57 11 5 Capturing Data and Performing Sweeps SENSe ADJust CONFigure HYSTeresis UPPer Threshold This setting can only be adjusted in the MSRA Master not in the applicati
127. ons 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 56 SENSe 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 FPS 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 56 Capturing Data and Performing Sweeps The only true measurement in MSRA mode in which l Q data from the input signal is captured and stored is performed by the MSRA Master This data acquisition is per formed as in the I Q Analyzer application i e a specified frequency span of the input signal is swept for a specified measurement time As soon as data has been stored to the capture buffer successfully a status bit 9 in the STAT OPER register is set see chapter 11 7 1 STATus OPERation Register on page 113 Once the bit has been set the device under test can already be recon figured while t
128. or a better understanding of the required configuration settings 6 1 Configuration Master parameters In MSRA mode only the MSRA Master performs a data acquisition Thus all parame ters that determine how the l Q data is captured from the I Q channel can only be con figured in the MSRA Master tab In all application tabs these settings are deactivated or have a different meaning Typical master parameters include e Sample rate e Record length e Bandwidth e Center frequency e Reference level Trigger settings e External reference e Impedance preamplification attenuation Channel specific parameters Each application however can define all parameters concerning analysis individually Typical channel specific parameters include e Center frequency duration and number of trace points for the application data extract e Offset of the application data extract from the trigger event e Evaluation methods e Range and scaling Trace mode Marker positions Conflicting parameters Master and channel specific parameters can be configured independantly of one another in any order that is convenient to you However there are dependencies between the parameters as the applications can only evaluate data that has been cap tured by the MSRA Master previously Thus configuring parameters is not restricted R amp S FPS MSRA MSRA Basics but you are informed about the violation of possible restrictions by error
129. ou must always switch to MSRA mode before executing any MSRA specific com mands using INST MODE MSR It is assumed that the R amp S FPS has already been set up for remote control in a net work as described in the R amp S FPS User Manual Note that basic tasks that are also performed in the base unit in the same way are not described here For a description of such tasks see the R amp S FPS User Manual In particular this includes Managing Settings and Results i e storing and loading settings and result data e Basic instrument configuration e g checking the system configuration customizing the screen layout or configuring networks and remote operation Using the common status registers The following tasks specific to MSRA mode are described here ieri aa ai 70 e COMMON SUME Sprin o EE ENAN 75 e Activating MSRA Measurements oooccccooninnccninnnaccncnrnnnnncrrrnnnnnen erre 76 e Configuring MSRA Measurements s ccceccecceeeeeeeeeeeeeceeaaeeeceeeeeeeeeteeeeseneaaees 81 e Capturing Data and Performing SWOGps eret neo er rette tenere ien 104 Retrieving Results citis ee se doa Ec de a dean 110 e Querying the Status RegisterS oocccconocnonccinnocnnccnnnronnncnnnanononcconononnccnnnornnnncnnnns 113 e Analyzing MSRA Measurements iiecaseeeiii essendi ttti hohe ad blend 116 e Commands Specific to MSRA ApplicatiONS oonoon
130. ources are useful when you are measuring power levels that fall below the noise floor of the R amp S FPS itself for example when measuring the noise level of a DUT Remote command DIAGnostic SERVice NSOurce on page 89 Trigger 2 Defines the usage of the variable TRIGGER AUX connector on the rear panel Trigger 1 is INPUT only Note Providing trigger signals as output is described in detail in the R amp S FPS User Manual Output Settings Input The signal at the connector is used as an external trigger source by the R amp S FPS No further trigger parameters are available for the con nector Output The R amp S FPS 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 94 OUTPut TRIGger lt port gt DIRection on page 94 Output Type Trigger 2 Type of signal to be sent to the output Device Trig Default Sends a trigger when the R amp S FPS triggers gered Trigger Sends a high level trigger when the R amp S FPS is in Ready for trig Armed ger state This state is indicated by a status bit in the STATus OPERation reg ister bit 5 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 94 Level Output Type
131. ow Over lap and the Window Length Remote command SENSe IQ FFT ALGorithm on page 97 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 sweep points is set to the FFT length automati cally 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 97 Window Function Advanced FFT mode Basic settings In the I Q analyzer you can select one of several FFT window types The following window types are available e Blackman Harris e Flattop e Gauss 7 1 2 Data Acquisition and Bandwidth Settings e Rectangular e 5 Term Remote command SENSe IQ FFT WINDow TYPE on page 98 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 OVERIap on page 98 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
132. page 123 TRACe IQ WBANd STATe is set to ON RST maximum available Default unit Hz Example TRAC IQ WBAN MBW 82 MHZ TRAC IQ WBAN MBW Result if R amp S FPS B 160 is active 160000000 11 4 4 Adjusting Settings Automatically The following remote commands are required to adjust settings automatically in a remote environment These commands are only available for the MSRA Master chan nel The tasks for manual operation are described in chapter 7 10 Automatic Set tings on page 55 Configuring MSRA Measurements Settings related to data acquisition measurement time hysteresis can only be adjus ted in the MSRA Master not in the applications SENSeJAD Jub AU ento Mo ac RE Rana E FARARDAN Rex cue qe ex Rue eu ed 102 SENSe ADJust CONFigure DURation esses enne nnne nennen rere 102 SENSe ADJust CONFigure DURation MODE cerei eene eniin tardan sepa dana nhan did 102 ISENSeJTAD Just F REGUeRG a otra reete Rota ph aia 103 SENSe ADJust CONFigure HYSTeresis LOWEV c ecceceeeeeeeeeeeeeeeeeeeesaeaeaaeaaaaeenenenenenes 103 SENSe JADJust CONFigure HYSTeresis UPPer ooooonnonncinononenenineninininenenoncacocenonanananananans 104 SENSE JADJUSECEVEl ocio it O actrees 104 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 e Reference level
133. path for frequencies close to 0 Hz Configuring MSRA Measurements Parameters State AUTO 1 Default the direct path is used automatically for frequencies close to 0 Hz OFF 0 The analog mixer path is always used RST 1 Example INP DPAT OFF Usage SCPI confirmed 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 35 Parameters State ON OFF 0 1 RST 1 0 for 1 Q Analyzer GSM VSA and MC Group Delay measurements Example INP FILT YIG OFF Deactivates the YIG preselector Manual operation See YIG Preselector on page 35 INPut IMPedance Impedance This command selects the nominal input impedance of the RF input 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 50 75 RST 500 Example INP IMP 75 Usage SCPI confirmed Manual operation See Impedance on page 34 INPut SELect lt Source gt 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 FPS If no additional input options are installed only RF input is supported 11 4 1 2 Config
134. quare brackets Introduction 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 lt 1 4 gt ZOOM STATe DISPlay ZOOM STATe ON enables the zoom in window 1 no suffix DISPlay WINDow4 ZOOM STATe ON enables the zoom in window 4 11 1 5 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 11 1 6 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 Parameters may have different forms of values e Numere Vales ina iia 73 LEE BOSA rial 74 e Character Dal nina did dedic 75 Character SUIS citer nite ted e adag op t d eii 75 a RP 75 11 1 6 1 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
135. r 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 93 RF Power Trigger Source 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 7 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 Trigger Settings Note If the input signal contains frequencies outside of this range e g for fullspan measurements the sweep 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 93 I Q Power Trigger Source Trigger Source Triggers the measurement when the magnitude of the sampled l Q data exceeds the trigger threshold Remote command TRIG SOUR IQP see TRIGger SEQuence SOURce on page 93 Trigger Level Trigger Source Defines the trigger lev
136. red is performed by the MSRA Master This data acquisition is per formed as in the I Q Analyzer application i e a specified frequency span of the input signal is swept for a specified measurement time The captured l Q data can then be analyzed in various different applications Result displays The data that was captured by the MSRA Master can be evaluated in various different applications All evaluation modes available for the MSRA applications are displayed in the selection bar in SmartGrid mode C For details on working with the SmartGrid see the R amp S FPS Getting Started manual The result displays available in MSRA mode are those described for the individual applications The MSRA Master is implemented as an I Q Analyzer application and has the same result displays See the R amp S FPS I Q Analyzer User Manual for a description of the result displays available for the I Q Analyzer and thus the MSRA Master 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 l Q data in the time and frequency domain see also chap ter 6 5 Measurements in the Time and Frequency Domain on page 28 This allows you to perform standard specific and general power measurements such as ACLR or SEM or statistical evaluations as well as analyzing the EVM or modula tion accuracy on the same captured l Q data R amp S9FPS MSRA Measurements and Resu
137. rwise 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 TRACe lQ WBANd STATe State This command determines whether the wideband provided by bandwidth extension options is used or not if installed Configuring MSRA Measurements Parameters State ON OFF ON If enabled installed bandwidth extension options can be used They are activated for bandwidths gt 40 MHz if the bandwidth is not restricted by the TRACe 10 WBANd MBWIDTH command Otherwise the currently available maximum bandwidth is allowed see chapter A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input on page 123 OFF The bandwidth extension option R amp S FPS B160 is deactivated the maximum analysis bandwidth is restricted to 40 MHz This parameter corresponds to the 40 MHz setting in manual opera tion RST ON TRACe IQ WBANd MBWIDTH Limit Defines the maximum analysis bandwidth Any value can be specified the next higher fixed bandwidth is used Parameters Limit 40 MHz Restricts the analysis bandwidth to a maximum of 40 MHz The bandwidth extension option R amp S FPS B160 is deactivated 160 MHz MAX The bandwidth extension option is activated The currently avail able maximum bandwidth is allowed see chapter A 3 Sample Rate and Maximum Usable I Q Bandwidth for RF Input on
138. s erre rores 11 joe 11 Multi standard POIL M 61 Radio Base Station MSR BS secsec 15 N Noise Telle TTE ED E 53 O Offset Analysis interval isis 50 Frequency aft Reference level visito 36 Reference level displayed eese 12 Operating mode 24 718 Changing MSRA remote 176 A tesa deadene 21 SEAMING eiii dalla seeds 8 Options Bandwidth extension 2 entrent 124 Electronic attenuation na 37 Preamplifier B24 2 nice eene 37 Output ConfigufatiOti resista ertet 53 Configuration remote eseeeeeneee 89 Noise source ise Sample rate definition seessuuss 123 SENGS titovi ii coi Settings remote MOI cria Overview COMMQUIATION emitan a teretes 32 P Parameters Beier MSRA applications MSRA Master eese Passing between applications Performing MSRA measurement esse 60 Prenggi RETE ODD S 44 Preamplifier cfr 37 c cM TEE 37 Presetting ChaMelS vacila eta n RR cott x Det 33 Default values Programming examples MSRA mode catalan 119 R R amp S SMBV Measurement example RADO uses liada RBW Displayed oia to llas 12 Ready for trigger otatus register t eia ete t ate ert MORES 113 Record length Denniton sitas 123 Displayed sins aoe VQ data nct 48 Relationship to sample rate E Reference level ui oon ere cem a
139. s 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 posi tioned 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 measure ment in all applications and determine correlations e g cross talk 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 e white AL the line lies within the interval but is not displayed hidden e no AL the line lies outside the interval 6 4 Restrictions for Applications As mentioned in various contexts before the MSRA applications themselves are identi cal to Signal and Spectrum operating mode however the correlation between applica tions and the MSRA Master require some restrictions Principally you are not restricted User Manual 1176 8574 02 06 27 R amp S FPS MSRA MSRA Basics m in setting parameters However if any contradictions occur between the configured capture se
140. s described in How to analyze the captured l Q data in MSRA applications on page 61 3 In the I Q Analyzer application press the MEAS key 4 From the Select Measurement dialog box select the required measurement in the time or frequency domain 5 Configure the measurement as described in the R amp S FPS User Manual The I Q data captured by the MSRA Master is analyzed in the time or frequency domain according to the selected measurement and result displays 6 To switch back to a conventional I Q analysis press the MEAS key and select the IQ Analyzer measurement 10 Measurement Example Analyzing MSR oignals Using the MSRA you can examine crosstalk between different radio access technolo gies RAT sent out from a base station at the same time Furthermore you can deter mine any signal interference between two or more carriers due to time correlation as you can analyze the same signal data captured at exactly the same time in various applications The following measurement example demonstrates how to capture data from a signal with 4 carriers using different standards GSM WCDMA LTE GSM and then analyze the data in the MSRA operating mode using the I Q Analyzer and the 3GPP FDD BTS application Measurement setup The measurements are performed using the following instruments and accessories The R amp S FPS with application firmware R amp S FPS K72 3GPP FDD BTS Measure ments e A Vector Signal Generator
141. selects the way the R amp S FPS application performs measurements sequentially Before this command can be executed the Sequencer must be activated see SYSTem SEQuencer on page 109 A detailed programming example is provided in the Operating Modes chapter in the R amp S FPS 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 FPS 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 regardless 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 Manual operation See Sequencer Mode on page 23 INITiate lt n gt SEQuencer REFResh ALL This function is only available if the Sequencer is de
142. sources Parameters lt Hysteresis gt Range 3dB 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 44 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 Suffix lt port gt Selects the trigger port 1 trigger port 1 TRIG IN connector on rear panel 2 trigger port 2 TRIG AUX 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 44 Configuring MSRA 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 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 analy
143. st FREQuency SENSeADIJUSELEV Elis ccc itr re rre teres ett dee oe i eae el fae ie SENSe FREQu ency CENT6h ao SENSe JFREQu hcy CENTE STEB 2s iier decent tds SENSe FREQU ency CENTer STEP AU TO eiui rii riot ete irre ado epe ere erro Entre Ebenen ere gene SENSe FEREQUSncy OFF Seba tetti ad SENSe TIQ BANDwidth BWIBthi MOBE iter corte p ice tte Eo inte erp Re Dic eere Rte cain SENSe IQ BANDwidth BWIDth RESOIUtIOn 2 ccrte ce ti HE te ete Ecco c t tede je iz lleHzagp Efl ET SENSe IIQ EFT EBNCGITi tior te tia SENSe TIQ EFT WINDOW EENGDI e cie cta n tete et e t ge b d Ot RE e LR SENSe IQ FFT WINDow OVERIap SENSe IIG EFT WINDOW TYPE aiino eure iia Rr Y OE ER EE D nuda diab SENSe MSRA GAP Ture OFFS el 2 1 mte tea a el Date E ge e SENSe SWEep POINIS it tete o tts e e SENSe ISWEeGPp TIME iiie Rees tint cr rae trn CE NALEN E AE EE as PAS iM A e Ee lesyea Em CAL Culate lt n gt MARKer lt m gt FUNCtion REFerence CALGulatesn MSRA ALINe SHOW eoi dr Cirta er tle Eo ED P D dp bd eerie CAL Culatespn MSRA CABINSDVALUe soc toe be oed cha peus coi a a CALEGulatesns MSRAWINDOWsns IVALE cr die occorre ias 118 DIAGNOStIC SERVICE NSOUFGG eere rrr eeii LA ae ti 89 DISPlayEWINDowsrnz TRAGeste Y SPACING usrano trente tr he ener antennae Sache cr cones ERR a 87 DISPlay WINDowsn TRAGCe xt Y SCALe iei rrt
144. ster can be analyzed in various different applications The analysis settings and functions available in MSRA mode are those described for the individual applications The MSRA Master is in effect an I Q Analyzer application and has the same analysis functions and settings See the R amp S FPS I Q Analyzer User Manual for a description of the analysis functions and settings available for the I Q Analyzer and thus the MSRA master Configuring the application data extract and analysis interval The settings required to configure the application data extract or analysis intervals vary depending on the application See the corresponding application manuals for details For the I Q Analyzer the settings are the same as those used to define the actual data acquisition see chapter 7 7 1 Data Acquisition on page 46 In MSRA application channels they define the analysis interval Be sure to select the correct measurement channel before executing these commands Exporting I Q Data The captured l Q data from the MSRA Master can be exported for further analysis in external applications The export functions are available in the Save Recall menu which is displayed when you select the E Save or EI Open icon in the toolbar For details on exporting l Q data see the R amp S FPS I Q Analyzer User Manual 8 1 Configuring the Analysis Line To hide or show and position the analysis line a dialog box is available To display the Analysis Lin
145. t 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 4 IQ Analyzer Data Acquisition Sweep Data Acquisition i Iv Advanced Fourier 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 5 Dd Visualization Swap I Q Frequency Resolution RBW Fig 7 2 Data acquisition settings with advanced FFT parameters Configuring data acquisition is only possible for the MSRA Master channel In I Q Ana o lyzer application channels these settings define the analysis interval see chapter 6 3 Multi Standard Analysis on page 26 Be sure to select the correct measurement channel before changing these settings Sample Bale 2 ree ost cda c e n ed cg ad n d nc d d a d RR 47 Analysis Bandwidth scores ded ern eerie ere a tere ete rue aed n Pus 48 Moas DIUI ccrtc eru cerunt adimere Pe dert nasterio 48 os A sec crt ea ste Ag ste bea dies veg acne E pa neds chen E ERRERA AEAEE EEN ARENORNA 48 ci A PPE restr nape ce Troe A core rer er prtre ete tre rperer errr rrr creer
146. t settings are activated directly after the R amp S FPS has been set to MSRA mode for the first time or after presetting the instrument Table 7 1 Default settings for MSRA mode Parameter Value Application 1 Q Analyzer Master Sequencer mode Continuous Sweep mode Continuous Reference level 0 dBm Attenuation 10 dB Acquisition time 5ms Record length 1001 samples Sample rate 100 0 MHz Trigger settings FREE RUN Evaluation Window 1 Spectrum 7 2 gt gt Gu Overview Configuration Overview Configuration Overview Throughout the measurement channel configuration an overview of the most important 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 0 00 dam xK inin Esan iEn IQ Analyzer Ref Level Level Offset Freq Offset Es E Frequency Trigger Gate Dig 88 Out Sample Rate Trigger Out Meas T Record Length Fig 7 1 Configuration Overview for MSRA Master 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 t
147. te control basics in the R amp S FPS User Manual RST does not influence the status registers e STATus OPERation Register esssssssssssssseeeene nennen enne 113 e Commands to Query the STATus OPERation Register sueessuss 114 STATus OPERation Register The STATus OPERation register contains information on current activities of the R amp S FPS It also contains information on activities that have been executed since the last read out Querying the Status Registers You can read out the register with STATus OPERation CONDition on page 114 or STATus OPERation EVENt on page 116 Table 11 2 Meaning of the bits used in the STATus OPERation register Bit No Meaning 0 CALibrating This bit is set as long as the instrument is performing a calibration 1 2 Not used 3 SWEeping Sweep is being performed in base unit applications are not considered identical to bit 4 In applications this bit is not used 4 MEASuring Measurement is being performed in base unit applications are not considered identical to bit 3 In applications this bit is not used 5 Waiting for TRIgger Instrument is ready to trigger and waiting for trigger signal 6 7 Not used 8 HardCOPy in progress This bit is set while the instrument is printing a hardcopy 9 For data acquisition in MSRA mode only Multi Standard capture finish This bit is set if a data acquisition measur
148. te commands Alpahabetical list of all remote commands described in the manual e Index Documentation Overview 1 2 Documentation Overview The user documentation for the R amp S FPS consists of the following parts e Printed Getting Started manual e Online Help system on the instrument e Documentation CD ROM with Getting Started User Manuals for base unit and firmware applications Service Manual Release Notes Data sheet and product brochures Online Help The Online 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 Y icon on the toolbar of the R amp S FPS Getting Started This manual is delivered with the instrument in printed form and in PDF format on the CD ROM It provides the information needed to set up and start working with the instrument Basic operations and handling are described Safety information is also included The Getting Started manual in various languages is also available for download from the Rohde 8 Schwarz website on the R amp S FPS product page at http www rohde schwarz com product FPS html 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 CD ROM delivered with the instrument In the user manuals all
149. ted accordingly and the warning Limit reached is displayed in the status bar Remote command INPut EATT STATe on page 85 INPut EATT AUTO on page 85 INPut EATT on page 85 Input Settings Some input settings affect the measured amplitude of the signal as well The parameters Input Coupling and Impedance are identical to those in the Input settings See chapter 7 3 Input Source Settings on page 33 Preamplifier option B22 B24 Input Settings Switches the preamplifier on and off If activated the input signal is amplified by 20 dB If option R amp S FPS B22 is installed the preamplifier is only active below 7 GHz If option R amp S FPS B24 is installed the preamplifier is active for all frequencies Remote command INPut GAIN STATe on page 85 7 4 2 Scaling the Y Axis The individual scaling settings that affect the vertical axis are described here Amplitude 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 Select the AMPT key and then the Scale Config softkey Amplitude Scale Range Scaling ie Logarithmic Range 100 dB v Linear Percent SS seien 100 0 o E gt Linear with Unit Auto Scale Once T Range Defines the displayed y axis range in dB The default value is 100 dB
150. tion see the Basics on FFT section of the R amp S FPS I Q Analyzer and l Q Input User Manual Auto mode Default The RBW is determined automatically depending on the Sample Rate and Record Length Data Acquisition and Bandwidth Settings Manual mode The RBW can be defined by the user The maximum RBW corre sponds to the Analysis Bandwidth The minimum RBW depends on the sample rate 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 96 SENSe IQ BANDwidth BWIDth RESolution on page 96 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 Transformation Algorithm Advanced FFT mode Basic settings Defines the FFT calculation method Single One FFT is calculated for the entire record length if the FFT Length is larger than the record length zeros 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 Wind
151. tional options are installed this is the only available input source Input Source ajout Frequency Input Coupling Digital IQ Impedance YIG Preselector IG WE COUN NG E 34 WMP COANCS a caseo teet ias a ira 34 VIG PresSe le ClOM mE 35 Input Coupling The RF input of the R amp S FPS can be coupled by alternating current AC or direct cur rent DC AC coupling blocks any DC 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 81 Impedance The reference impedance for the measured levels of the R amp S FPS can be set to 50 O or75 0 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 see Reference Level on page 36 Remote command INPut IMPedance on page 82 Amplitude YIG Preselector Activates or deactivates the YIG preselector if available on the R amp S FPS An internal YIG preselector at the input of the R amp S FPS ensures that image frequen
152. to spectral or time data first lt n gt is irrelevant It is currently only available for I Q 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 IQ Evaluation using l Q data CALCulate lt n gt MSRA ALINe SHOW This command defines whether or not the analysis line is displayed in all time based windows in all MSRA applications and the MSRA Master lt n gt is irrelevant Note even if the analysis line display is off the indication whether or not the currently defined line position lies within the analysis interval of the active application remains in the window title bars Commands Specific to MSRA Applications Parameters State ON OFF RST ON Manual operation See Show Line on page 59 CALCulate lt n gt MSRA ALINe VALue Position This command defines the position of the analysis line for all time based windows in all MSRA applications and the MSRA Master lt n gt is irrelevant Parameters Position Position of the analysis line in seconds The position must lie within the measurement time of the MSRA measurement Default unit s Manual operation See Position on page 59 CALCulate lt n gt MSRA WINDow lt n gt IVAL This command queries the analysis interval for the window specified by the WINDow suffix lt n gt the CALC suffix is irrelevant Th
153. ttings and the analysis settings error messages are displayed in the status bar of the application and an icon M is displayed next to the channel label However it does not matter in which order you configure the settings you will not be prevented from doing so In particular the following restrictions apply to applications in MSRA mode e Data acquisition parameters related to data acquisition can only be configured by the MSRA Master e Application data only data contained in the capture buffer can be analyzed by the application this implies the following restrictions Center frequency must lie within the captured data bandwidth Measurement time Record length must be smaller than or equal to the val ues of the MSRA Master Capture offset must be smaller than the record length of the MSRA Master Trace averaging only for sweep count 0 e AUTO SET functions in applications only the frequency can be adjusted auto matically all other adjustment functions require a new data acquisition General restrictions concerning sample rates and maximum usable I Q bandwidths for 1 Q data also apply in MSRA mode see the R amp S FPS I Q Analyzer User Manual for details 6 5 Measurements in the Time and Frequency Domain The I Q Analyzer application not Master in multistandard mode can also perform measurements on the captured l Q data in the time and frequency domain In order to do so the l Q Analyzer performs an FF
154. ture buffer for example Generally if a signal contains data channels for multiple standards the individual appli cations are used to analyze the channel for the corresponding standard Thus it is of interest to know which application or more precisely which data channel is analyzing which part of the captured data and how each data channel is correlated in time to others The MSRA Master display indicates the data covered by each application restricted to the channel bandwidth used by the corresponding standard by vertical blue lines labeled with the application name For applications that support several standards e g VSA LTE an estimated or user defined bandwidth is indicated MSRA View EE MSRA Master co 3G FOD BTS Ref Level 5 00 dBm Meas Time Att 15dB Freq 1 0GHz RecLength TRG EXT1 1 Spectrum CF 1 0 GHz Span 25 0 MHz Fig 6 1 MSRA Master indicating covered bandwidth for 4 applications Analysis interval Each application receives an extract of the data from the capture buffer However the individual evaluation methods of the application need not analyze the complete data range Some applications allow you to select a specific part of the data for analysis e g an individual frame burst or pulse or to use an offline trigger that defines an addi tional offset to the capture offset The data range that is actually analyzed is referred to as the analysis interval User Manual 1176 8574 02 06 26 R amp S9
155. uate the data in the active applications one after the other then repeat the data acquisition and evaluate the new data etc The tabs are updated after each measurement or eval uation This behaviour is identical to Signal and Spectrum Analyzer mode also for Sin gle Sequence or Channel Defined Sequence modes However if you switch the Sequencer off the behaviour of the sweep functions is slightly different to Signal and Spectrum Analyzer mode see also Performing sweeps on page 25 e f continuous sweep is active default and you switch to a different application continuous sweep is aborted This is necessary in order to evaluate the same data in different applications without overwriting the data in the capture buffer Continu ous sweep can be started again as usual e Only the application that is currently displayed when a measurement is performed is updated automatically A new Refresh function is available to update the dis play in one or all other applications Using the Sequencer in MSRA Mode For details on the Sequencer function see the R amp S FPS User Manual Sy The Sequencer menu is available from the toolbar Sequencer State Activates or deactivates the Sequencer If activated sequential operation according to the selected Sequencer mode is started immediately Remote command SYSTem SEQuencer on page 109 INITiate lt n gt SEQuencer IMMediate on page 107 INITiate lt n gt SEQuencer ABORt on page 107
156. ure DURation MODE on page 102 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 102 SENSe ADJust CONFigure DURation on page 102 Upper 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 an upper threshold the signal must exceed compared to the last mea surement before the reference level is adapted automatically Remote command SENSe ADJust CONFigure HYSTeresis UPPer on page 104 Automatic Settings 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 103 Configuring the Analysis Line 8 Analysis The data that was captured by the MSRA Ma
157. uring MSRA Measurements Parameters Source RF Radio Frequency RF INPUT connector RST RF Configuring the Vertical Axis Amplitude Scaling The following commands are required to configure the amplitude and vertical axis set tings in a remote environment e Ampltude Settings ii rai 83 e Configuring the AttenuatiON oonninnccnnnnnncncnnnnnenccncnnnnnncnnnnnnnnnn nc nan nnnnn nc arc nnnn nr rra 84 e Configuring a Preamplifigr ui corretti rettet tte 85 e Scaling the Y AXIS since AAA 86 Amplitude Settings Useful commands for amplitude configuration described elsewhere e SENSe ADJust LEVel on page 104 Remote commands exclusive to amplitude configuration CALCulate lt n gt MARKer lt m gt FUNCtion REFerence c ccececeeeeeeeeeeeeeeeeeeeaeeeaeeaeaaaaaenenenenes 83 DISPlay WINDow n TRACests YD SCALe RLEVel 22 n oru annee 83 DISPlay WINDow n TRACe t Y SCALe RLEVel OFFSet eeeeeeeeeenee 83 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 delta 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 DISPlay WINDow lt n gt TRACe lt t gt Y SCALe RLEVel lt ReferenceLevel gt This command defines the reference level for al
158. value is indicated in the Value field Manual 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 88 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 7 6 Trigger Settings 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 89 Trigger Settings Trigger settings determine when the input signal is measured These settings are only available for the MSRA Master The Capture Offset which has a similar function to the trigger offset but is available for MSRA applications only is described in chapter 7 7 Data Acquisition and Band width Settings on page 46 Trigger settings can be configured via the TRIG k
159. you activate an application a new measurement channel is created which determines the measurement settings for that application The same application can be activated with different measurement settings by creating several channels for the same application Each channel is displayed in a separate tab on the screen o The maximum number may be limited further by the available memory on the instru ment independent vs correlating measurements With the conventional R amp S FPS Signal and Spectrum Analyzer you can perform several different measurements almost simultaneously However the individual mea surements are independent of each other each application captures and evaluates its own set of data regardless of what the other applications do In some cases it may be useful to analyze the exact same input data using different applications For example imagine capturing data from a base station and analyzing the RF spectrum in the Analog Demodulation application If a spur or an unexpected peak occurs you may want to analyze the same data in the I Q Analyzer to see the real and imaginary components of the signal and thus detect the reason for the irregu lar signal Normally when you switch to a different application evaluation is performed on the data that was captured by that application and not the previous one In our example that would mean the irregular signal would be lost Therefore a second oper ating mode is available in th
160. zed Parameters lt TriggerLevel gt Range 130 dBm to 30 dBm RST 20 dBm Example TRIG LEV IQP 30DBM 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 Example TRIG LEV RFP 30dBm TRIGger SEQuence SLOPe Type 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 11 4 2 2 Configuring MSRA Measurements Example TRIG SLOP NEG Manual operation See Slope on page 45 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 Source IMMediate Free Run EXTernal Trigger signal from the TRIGGER IN connector

R&S FPS MSRA User Manual

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R&amp;S FPS MSRA User Manual

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R&S FPS MSRA User Manual