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WCA230A & WCA280A Option 28 TD-SCDMA - TRS

1. 0 TD_SCDMA STABle TPCSs COUN 2 2 2 0 00 0 e eee ees TD_SCDMA STABle TPCSs SELect 0 0 e cece eee TD_SCDMA IM BANDwidth BWIDth INTegration TD_SCDMA IM DIRection 0 6 6 eee eee TD_SCDMA IM LIMit FORDer STATe 0000 065 TD_SCDMA IM LIMit TORDer STATe 00065 TD_SCDMA IM SCOFfset 2 0 66 cece cece es TD_SCDMA SEMask BANDwidth BWIDth INTegration SENSe TD_SCDMA SEMask DIRection 006 0 cece eee eens SENSe TD_SCDMA SEMask LIMit ISPurious ZONE 1 2 3 4 5 STATe SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 2 3 4 5 ES FATC 2 aer nr enr ERr oe Seabee oe Madd sah hse RETA AREE ae Yale SENSe TD_SCDMA SEMask MEASurement 000000000s SENSe TD_SCDMA SEMask RCHannel MODE 0045 SENSe TD_SCDMA SEMask RCHannel LEVel 20 0055 SENSe TD_SCDMA TOOMask DIRection 0000 eee eee SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe La e a a a a a na a nes ee ne es es ees ee Ce ee ee ee SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe SENSe TD_SCDMA OBWidth DIRection 0 00 00 0 eee SENSe TD_SCDMA OBWidth LIMit STATe 00 0005 SENSe TD_SCDMA OBWidth PERCent 0 06000 cee ee eens MMEMory Commands ihe lated ETUE DaN MMEMoty EOAD LIMit ooa cirese na noie ue awu ea A E a A MMEMory S
2. 0 00005 DISPlay Commands ccc cee ccc ee ccc eceececes DISPlay TD_SCDMA DDEMod MVIlew FORMat DISPlay TD_SCDMA DDEMod MVlew RADix 04 DISPlay TD_SCDMA DDEMod MVlew X SCALe DISPlay TD_SCDMA DDEMod MVlew X SCALe DISPlay TD_SCDMA DDEMod MVlIew X SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe DISPlay TD_SCDMA DDEMod MVlew Y SCALe RANGe DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol STARt DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol END DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol MRPower DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol OPOWer DISPlay TD_SCDMA DDEMod MVIew ZOOM TSLot START DISPlay TD_SCDMA DDEMod SVlew FORMat DISPlay TD_SCDMA DDEMod SVlew RADix 045 DISPlay TD_SCDMA DDEMod SVlew X SCALe OFFSet DISPlay TD_SCDMA DDEMod SVlew X SCALe PDIVision DISPlay TD_SCDMA DDEMod SVlew X SCALe RANGe DISPlay TD_SCDMA DDEMod SVlew Y SCALe FIT DISPlay TD_SCDMA DDEMod SVlew Y SCALe FULL DISPlay TD_SCDMA DDEMod SVlew Y SCALe OFFSet DISPlay TD_SCDMA DDEMod SVlew Y SCALe PDIVision DISPlay TD_SCDMA DDEMod SVlew Y SCALe PUNit DISPlay TD_SCDMA DDEMod SVlew Y SCALe RANGe
3. DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol STARt DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol END DISPlay TD_SCDMA DDEMod SVlew ZOOM TSLot START DISPlay TD_SCDMA SPECtrum subgroup DISPlay TD_SCDMA SPECtrum X SCALe OFFSet DISPlay TD_SCDMA SPECtrum X SCALe PDIVision DISPlay TD_ SCDMA SPECtrum Y SCALe FIT DISPlay TD_ SCDMA SPECtrum Y SCALe FULL DISPlay TD_SCDMA SPECtrum Y SCALe OFFSet DISPlay TD_SCDMA SPECtrum Y SCALe PDIVision 3 4 Description Runs auto scale on the subview Sets the subview vertical axis to the default full scale value Sets or queries the minimum vertical value bottom end in the subview Sets or queries the vertical or power scale per division in the subview Sets or queries the unit on the Y or power axis in the subview Sets or queries the vertical full scale value in the subview Sets the zoom to the transmit mask start in the subview during the digital modulation related measurement Sets the zoom to the transmit mask end in the subview during the digital modulation related measurement Sets the zoom to the timeslot start in the subview during the digital modulation related measurement Sets or queries the minimum value left end of the horizontal axis frequency in the spectrum view Sets or queries the horizontal scale in the spectrum view Runs auto scale on the spectrum view Sets the vertical axis to the default full scale val
4. DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol STARt DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol END DISPlay TD_SCDMA DDEMod SVlew ZOOM TSLot START DISPlay TD_SCDMA SPECtrum X SCALe OFFSet DISPlay TD_SCDMA SPECtrum X SCALe PDIVision DISPlay TD_SCDMA SPECtrum Y SCALe FIT DISPlay TD_SCDMA SPECtrum Y SCALe FULL DISPlay TD_SCDMA SPECtrum Y SCALe OFFSet DISPlay TD_SCDMA SPECtrum Y SCALe PDIVision FETCh Commands 4 05 sai ans hia ees seas eee wea TFET Chi TD SCDMASACER oi thc oa naie E See by ne Sea bs FETCh TD_SCDMA CDPower etar erena iok EES FETCh TD_SCDMA CHPower 1 0 0 0 0 0 c cece eee ee eee SFETChiTD SGDMAGIM 0 otis DAELE elated ob re wie be FETCh TD_SCDMA MACCuracy 00 0 c ee cee eee eee FETCh TD_SCDMA OBWidth 1 0 0 0 0 0 0 c cee eee eee FETCh TD_SCDMA SEMask 1 0 0 0 000 cece cece eee FETCh TD_SCDMA SFSummary 0 0 00 cee eee FETCh TD_SCDMA STABle 000 0 c ec cee cee eee eens OFFSet PDIVision RANGe FULL OFFSet PDIVision PUNit KS SS ee A a 3 13 3 14 3 14 3 14 3 15 3 16 3 17 3 18 3 18 3 19 3 19 3 20 3 20 3 20 3 21 3 21 3 22 3 22 3 23 3 23 3 24 3 24 3 26 3 27 3 27 3 28 3 28 3 29 3 29 3 30 3 30 3 31 3 31 3 32 3 32 3 32 3 34
5. Downlink signals can not be active when using the pattern method to determine subframe timing WCA230A amp WCA280A TD SCDMA Analysis Software 2 37 TD SCDMA Measurements 2 38 Changing the View Contents Active Timeslot Threshold dB Sets the threshold that determines if a timeslot is active or inactive A timeslot that is transmitting above this level is considered active Limits Displays the limits editor to set the pass fail limits for measure ments The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot Refer to Editing the Measurement Limits on page 2 65 for more information NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the scale settings for the display You can change the contents in the view using the VIEW DEFINE menu Press the VIEW DEFINE key to open the menu Grid Style Sets the grid style in the view You can select Off Fix or Flex For Flex the grid is changed depending on frequency or span setting m Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire wavef
6. NOTE This command is valid when DISPlay TD_SCDMA DDE Mod MVlew FORMat is set to CDPower CVSYmbol or CVSFrame Syntax DISP1 ay TD_SCDMA DDEMod MVIew Y SCALe PUNit RELative ABSolute DISPlay TD_SCDMA DDEMod MVIew Y SCALe PUNit WCA230A amp WCA280A TD SCDMA Analysis Software 3 21 GPIB Commands Arguments Measurement Modes Example Related Commands RELative represents the relative channel power to the total power of all the channels along the Y axis in dB ABSolute represents the absolute power of each channel along the Y axis in dBm DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew Y SCALe PUNit ABSolute sets the Y axis unit in the main view to Absolute under the TD SCDMA standard DISPlay TD_SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew Y SCALe RANGe Syntax Arguments Measurement Modes Example Related Commands Sets or queries the full scale value of the vertical axis in the main view during the digital modulation related measurement DISPlay TD_SCDMA DDEMod MVIew Y SCALe RANGe lt numeric_value gt DISPlay TD_SCDMA DDEMod MVIew Y SCALe RANGe lt numeric_value gt lt NRf gt specifies the full scale value of the vertical axis in the main view The valid range depends on the display format Refer to Table C 1 in Appendix C DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew Y SCALe RANGe 10PCT sets the full scale value of the vertical axis to 10 when
7. SENSe TD_SCDMA ACQuisition HISTory 0 sets the acquisition history to 0 in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 65 GPIB Commands SENSe TD_SCDMA ANALysis Subgroup The SENSe TD_SCDMA commands set up the analysis conditions in the TD SCDMA analysis Command Tree SENSe TD_SCDMA ANALysis CHANnel THReshold lt numeric_value gt INTerval lt numeric_value gt OFFSet CHIPs lt numeric_value gt DFRequency lt numeric_value gt 1Q lt boolean gt REFerence SFRame TRIGger DWPTs TFPHase MIDamb1e DWPTs TIME UTSPattern DWPTs UTSPattern lt numeric_value gt TSLot ALL CURRent THReshold lt numeric_value gt SENSe TD_SCDMA ANALysis CHANnel THReshold Sets or queries the threshold for the channel measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA ANALysis CHANnel THReshold lt numeric_value gt SENSe TD_SCDMA ANALysis CHANnel THReshold Arguments lt numeric_value gt lt NR1 gt specifies the analysis channel threshold in dB Range 100 dB to 50 dB Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA ANALysis CHANnel THReshold 30dB sets the analysis channel threshold to 30 dB in the TD SCDMA analysis 3 66 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA ANALysis INTerval Sets or queries the analysis interval in chips in the TD SCDMA analysis Syntax SENSe TD_SCDMA AN
8. MACCuracy STAB1e TSSummary TOOMask OBWidth SFSummary OFF SENSe TD_SCDMA BLOCKk Sets or queries the number of the block to measure in the TD SCDMA analysis Syntax SENSe TD_SCDMA BLOCk lt numeric_value gt SENSe TD SCDMA BLOCk lt numeric_value gt lt NR1 gt specifies the block number Zero represents the latest block Range M to 0 M number of acquired blocks Arguments Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA BLOCk 5 sets the block number to 5 in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 61 GPIB Commands SENSe TD_SCDMA FILTer MEASurement Sets or queries the measurement filter for the current measurement in the TD SCDMA analysis NOTE This command is not allowed if the current measurement is OBW Syntax SENSe TD_SCDMA FILTer MEASurement OFF RCOSine RRCosine SENSe TD_SCDMA FILTer MEASurement Arguments The arguments and descriptions are listed below Argument Description OFF No filter RCOSine The Raised Cosine filter RRCosine The Root Raised Cosine filter Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA FILTer MEASurement OFF sets the measurement filter to off for the current measurement SENSe TD_SCDMA IMMediate Performs calculation for the acquired data in the TD SCDMA analysis Syntax SENSe TD_SCDMA IMMediate Arguments None Measurement Modes DEMTD_SCDMA Example SENSe TD_S
9. Syntax SENSe TD_SCDMA SPECtrum TINTerval Arguments None Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA SPECtrum TINTerval returns the length of the time domain information in the TD SCDMA analysis 3 72 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA SELect Subgroup The SENSe TD_SCDMA commands set up the select conditions related to the TD SCDMA analysis Command Tree SENSe TD_SCDMA SELect CODE lt numeric_value gt SFRame lt numeric_value gt TSLot TSON DWPTs UPPTs TS 1N TS2N TS3N TS4N TSSN TS6N SENSe TD_SCDMA SELect CODE Sets or queries the selected code in the TD SCDMA analysis NOTE When the displayed results can be separated by code this control selects the results to be displayed by code At other times this control is not available Syntax SENSe TD_SCDMA SELect CODE lt numeric_value gt SENSe TD SCDMA SELect CODE Arguments lt numeric_value gt lt NR1 gt specifies the code Range 0 to 15 Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA SELect CODE 2 sets the analysis to code 2 in the TD SCDMA analysis SENSe TD_SCDMA SELect SFRame Sets or queries the selected subframe in the TD SCDMA analysis NOTE This command is only available when results are available for multiple subframes WCA230A amp WCA280A TD SCDMA Analysis Software 3 73 GPIB Commands Syntax SENSe TD_SCDMA
10. The OBW Occupied Bandwidth measurement measures the bandwidth that contains a certain percentage of the total integrated power of one timeslot using the percentage and timeslot you specify The measured bandwidth is centered at the center frequency Figure 2 17 shows an example of the OBW measurement Code Domain Power Channel Power Measurement Off Timeslot n Power Ratio The TD SCDMA OBW measurement only operates in freerun mode and therefore does not display timing settings when pressing the TIMING menu Timeslot alignment from the start of a subframe for the channel power measurement is determined by analyzing a sufficiently long IQ capture WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Setting the Measurement Once you ve selected the OBW measurement you can set the measurement Parameters parameters for OBW using the MEAS SETUP menu Most of the OBW measurement parameters are not shared with other measurements Press the MEAS SETUP key to open the menu Switching Point timeslot Sets the point where the timeslots switch from uplink to downlink timeslots You can set the value from 1 to 6 The timeslot switching point selection is a global setting for all TD SCDMA demodula tion and RF measurements Select Timeslot Sets the timeslot for the measurement The control cycles through timeslots 0 DP downlink pilot UP uplink pilot TS1 TS2 TS3 TS4 TS5 and TS6 The timesl
11. lt Merror n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Merror n gt is the magnitude error of each symbol Four byte little endian floating point format specified IEEE 488 2 Measurement level Chip n Max 704 WCA230A amp WCA280A TD SCDMA Analysis Software 3 43 GPIB Commands Measurement Modes Example Related Commands PERRor lt Num_digit gt lt Num_byte gt lt Perror 1 gt lt Perror n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Perror n gt is the phase error of each symbol Four byte little endian floating point format specified IEEE 488 2 Measurement level Chip n Max 704 DEMTD_SCDMA FETCh TD _SCDMA MACCuracy RESult might return 1 3 8261E 000 2 02853E 000 4 36361E 000 2 06348E 000 9 99574E 001 3 51029E 000 1 46589E 000 1 75665E 002 7 40321E 001 5 56065E 001 4 77605E 002 3 59144E 001 as the results of the modulation accuracy measurement of the TD SCDMA measurement INSTrument SELect FETCh TD_SCDMA OBWidth Syntax Arguments Returns Measurement Modes Example Related Commands 3 44 Fetches the results of the occupied bandwidth measurement under the TD SCDMA standard FETCh TD SCDMA OBWidth None lt Pass_fail gt lt obw gt Where lt Pass_fail gt 1
12. GPIB Commands Measurement Modes Example DEMTD_SCDMA SENSe TD_SCDMA SEMask BANDwidth INTegration 2 5MHz sets the channel bandwidth to 2 5 MHz for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask DiRection Syntax Returns Measurement Modes Example Sets or queries which limit table is used for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask DIRection UPLink DOWN1 ink SENSe TD_SCDMA SEMask DIRection UPLink Uplink DOWNIink Downlink DEMTD_SCDMA SENSe TD_SCDMA SEMask DIRection UPLink sets the spectrum emission mask measurement to use the uplink limits table in the TD SCDMA analysis SENSe TD_ SCDMA SEMask LIMit ISPurious ZONE 1 2 3 4 5 STATe Syntax Arguments Measurement Modes Example 3 92 Sets or queries whether to enable or disable the offset from the inband spurious zone limit testing for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask LIMit ISPurious ZONE 1 2 3 4 5 STATe lt boolean gt SENSe TD_SCDMA SEMask LIMit 1SPurious ZONE 1 2 3 4 5 STATe Zones 1 2 3 4 and 5 correspond to Zones A B C D and E in the limit editor respectively lt boolean gt ON OFF 1 0 ON or 1 enables the offset from the inband spurious zone limit testing OFF or 0 disables the offset from the inband spurious zone limit testing DEMTD_SCDM
13. Measurement results Horizontal start Figure 2 11 Code domain power measurement Display Elements The following information is shown in the code domain power measurement display m Overview The overview display area can contain the power versus time or spectrogram measurement displays WCA230A amp WCA280A TD SCDMA Analysis Software 2 23 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 24 Parameters Changing the View Contents Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spectrum display m Mainview The mainview display area can contain one of the code domain power related measurements The mainview also displays the numerical measurement results of the selected display A Pass or Fail message determined by the Limits settings for each measurement is displayed If all measurements pass PASS is displayed at the top of the screen If any measurement fails FAIL is displayed at the top of the screen To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 24 for more information You can set timing parameters for the code domain power acquisition by using the TIMING menu Press the TIMING key to open the menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing pa
14. ON OFF 1 0 SENSe TD_SCDMA CHPower LIMit STATe ON or 1 enables the limit testing OFF or 0 disables the limit testing DEMTD_SCDMA SENSe TD_SCDMA CHPower LIMit STATe ON enables the limit testing for the channel power measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA ACLR Subgroup Command Tree The SENSe TD_SCDMA ACLR commands set up the conditions related to the ACLR Adjacent Channel Leakage power Ratio measurement in the TD SCDMA analysis SENSe TD_SCDMA ACLR DIRection sLIMit ADJacent 1 2 3 4 STATe lt boolean gt SENSe TD_SCDMA ACLR DIRection Syntax Returns Measurement Modes Queries which limit table is used for the ACLR measurement in the TD SCDMA analysis SENSe TD_SCDMA ACLR DIRection UPLink Uplink DOWNIink Downlink DEMTD_SCDMA SENSe TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe 2 Syntax Sets or queries whether to enable or disable the adjacent limit testing for the ACLR measurement in the TD SCDMA analysis SENSe TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe ON OFF 1 0 SENSe TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe ADJacent 1 2 3 4 is defined as follows ADJacent 1 is 1st Lower ADJacent2 is 1st Upper ADJacent3 is 2nd Lower ADJacent4 is 2nd Upper WCA230A amp WCA280A TD SCDMA Analysis Software 3 81 GPIB Command
15. Syntax SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe lt boolean gt SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe Arguments lt boolean gt ON OFF 1 0 ON or 1 enables the transmit on off mask limit testing OFF or 0 disables the transmit on off mask limit testing WCA230A amp WCA280A TD SCDMA Analysis Software 3 95 GPIB Commands Measurement Modes Example DEMTD_SCDMA SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe ON enables the limit testing of the transmit on off mask measurement in the TD SCDMA analysis SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe 3 96 Syntax Arguments Measurement Modes Example Sets or queries the enable or disable transmit on off mid ramp level limit checking for the transmit on off mask measurement in the TD SCDMA analysis NOTE When SENSe TD_SCDMA TOOMask DIRection returns ULPlink the limit is the transmit ON mid ramp level When the query returns DOWNIink the limit is the transmit OFF mid ramp level SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe lt boolean gt SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe lt boolean gt ON OFF 1 0 ON or 1 enables the transmit on off mid ramp level mask limit testing OFF or 0 disables the transmit on off mid ramp level mask limit testing DEMTD_SCDMA SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe ON enables the mid ramp level limit testing of the transmit on of
16. TD SCDMA Measurements Start Freq Hz Sets the minimum value of the frequency axis The stop frequency automatically adjusts according to the span setting Stop Freq Hz Sets the maximum value of the frequency axis The start frequency automatically adjusts according to the span setting NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the span settings for the display Setting the Measurement Once you ve selected the intermodulation measurement you can set the Parameters measurement parameters for intermodulation using the MEAS SETUP menu Most of the intermodulation measurement parameters are not shared with other measurements Press the MEAS SETUP key to open the menu Switching Point timeslot Sets the point where the timeslots switch from uplink to downlink timeslots You can set the value from 1 to 6 The timeslot switching point selection is a global setting for all TD SCDMA demodula tion and RF measurements Select Timeslot Sets the timeslot for the measurement The control cycles through timeslots 0 DP downlink pilot UP uplink pilot TS1 TS2 TS3 TS4 TS5 and TS6 The timeslot selection is a global selection for all TD SCDMA demodulation and RF measurements 2nd Channel Offset Sets the center frequency of the second channel Use this menu item when the interfering carrier may be outside of the analysis span Main Channel Integratio
17. Code domain power versus symbol Power codogram Timeslot power versus time with ideal start time shown Power versus time with limit mask Subframe Power versus Time Symbol Table Example DISPlay TD_SCDMA DDEMod SVIew FORMat SPECtrum displays the spectrum in the subview under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod MVIew FORMat 3 26 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands DISPlay TD_SCDMA DDEMod SVlew RADix Syntax Arguments Measurement Modes Example Sets or queries the base of symbols on the subview during the TD SCDMA analysis NOTE This command is only valid when DISPlay TD_SCDMA SVIew FORMat is set to STABle DISPlay TD_SCDMA DDEMod SVIew RADix BINary OCTal HEXadecima DISPlay TD_SCDMA DDEMod SVIew RADix The arguments and base display are listed below Argument Base BINary Binary notation OCTal Octal notation HEXadecimal Hexadecimal notation DEMTD_SCDMA DISPlay TD_SCDMA DDEMod SVIew RADix BINary sets the subview display to show the symbols in binary under the TD SCDMA standard DISPlay TD_SCDMA DDEMod SVlew X SCALe OFFSet Syntax Arguments Measurement Modes Sets or queries the minimum horizontal value left end in the subview during the digital modulation related measurement NOTE This command is not available when DISPlay TD_SCDMA DDEMod SVlew FORMat is set to MACCuracy DISPlay TD_SCDMA DDEMod
18. READ TD_SCDMA CHPower READ TD_SCDMA IM READ TD_SCDMA OBWidth READ TD_SCDMA SEMask READ TD_SCDMA SPECtrum ACLR READ TD_SCDMA SPECtrum CHPower READ TD_SCDMA SPECtrum IM READ TD_SCDMA SPECtrum SEMask READ TD_SCDMA SPECtrum OBWidth 3 6 Description Returns the adjacent channel leakage power ratio measurement results Returns the channel power measurement results Returns the intermodulation measurement results Returns the occupied bandwidth measurement results Returns the spectrum emission mask measurement results Returns the spectrum waveform data of the adjacent channel leakage power ratio ACLR measurement Returns the spectrum waveform data of the channel power measurement Returns the spectrum waveform data of the intermodula tion measurement Returns the spectrum waveform data of the spectrum emission mask SEM measurement Returns the spectrum waveform data of the occupied bandwidth measurement WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe Commands Use the SENSe commands to set the detailed measurement conditions Table 3 5 SENSe commands Header SENSe TD_SCDMA subgroup SENSe TD_SCDMA BLOCK SENSe TD_SCDMA FILTer MEASurement SENSe TD_SCDMA IMMediate SENSe TD_SCDMA MEASurement SENSe TD_SCDMA ACQuisition subgroup SENSe TD_SCDMA ACQuisition SFRames SENSe TD_SCDMA ACQuisition HISTory SEN
19. Syntax DISPlay TD_SCDMA DDEMod SVIew Y SCALe FULL Arguments None Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew Y SCALe FULL sets the subview s vertical axis to the default full scale value under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod SVIew FORMat WCA230A amp WCA280A TD SCDMA Analysis Software 3 29 GPIB Commands DISPlay TD_SCDMA DDEMod SVlew Y SCALe OFFSet Syntax Arguments Measurement Modes Example Related Commands Sets or queries the minimum vertical value in the subview bottom end during the digital modulation related measurement NOTE This command is not available when DISPlay TD_SCDMA DDEMod SVlew FORMat is set to MACCuracy DISPlay TD_SCDMA DDEMod SVIew Y SCALe OFFSet lt numeric_value gt DISPlay TD_SCDMA DDEMod SVIew Y SCALe OFFSet lt numeric_value gt lt NRf gt specifies the minimum vertical value in the subview The valid range depends on the display format Refer to Table C 1 in Appen dix C DEMTD_SCDMA DISPlay TD_SCDMA DDEMod SVIew Y SCALe 0FFSet 100dB sets the minimum vertical value to 100 dBm when the subview displays spectrum under the TD SCDMA standard DISPlay TD_SCDMA DDEMod SVIew FORMat DISPlay TD_SCDMA DDEMod SVlew Y SCALe PDIVision Syntax Arguments Measurement Modes Example 3 30 Sets or queries the vertical or power scale per division in the subview DISPlay
20. TD_SCDMA SELect CODE 0 0 6 6 cc ccc cece eee 3 73 SENSe TD_SCDMA SELect SFRame 0 0 0 0 cece eee eee 3 73 SENSe TD_SCDMA SELect TSLot 2 0 0 2 cece cece eee ee 3 74 SENSe TD_SCDMA MODulation CONTrol 0 20s e eee 3 75 SENSe TD_SCDMA MODulation K NZERO 0 66 0 eee eee eee 3 76 SENSe TD_SCDMA MODulation K ZERO 0 0 0 6 500 eee eee eee 3 76 SENSe TD_SCDMA MODulation SCODe 0002 eee eee 3 76 SENSe TD_SCDMA MODulation SPOint 000 eee 3 77 SENSe TD_SCDMA MODulation SYNC DOWNIink 3 77 SENSe TD_SCDMA MODulation SYNC UPLink 04 3 77 WCA230A amp WCA280A TD SCDMA Analysis Software iii Table of Contents Appendices SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration TD_SCDMA CHPower DIRection 0 00 2 eee TD_SCDMA CHPower LIMit STATe 0 0000 005 TD_SCDMA ACLR DIRection 6000 c cee eee eee TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe TD_SCDMA MACCuracy DIRection 000000008 TD_SCDMA MACCuracy LIMit EVM PEAK STATe TD_SCDMA MACCuracy LIMit EVM RMS STATe TD_SCDMA MACCuracy LIMit PCDerror STATe TD_SCDMA MACCuracy LIMit RHO STATe
21. TSO DL Subfram 1 Analyzed A Peak CDE 4 a Code Domain Error Number of Active Channels Vertical start lt Horizontal scale Measurement results Horizontal start Marker code 3 0 037 dB 4 10 A horizontal bar over a group of dB codes indicate a wider code Figure 2 12 Code domain power display The power bars use colors to distinguish between active channels and inactive channels Red indicates active yellow indicates inactive A yellow horizontal bar above a set of active codes indicates that these codes have been detected as belonging to a single code channel at a spreading factor lower than 16 For example a yellow bar over 2 codes means that this code is actually a single code channel with a spreading factor of 8 NOTE Whether a channel is active or inactive is determined by the ACTIVE CHANNEL THRESHOLD setting in the MEAS SETUP menu You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform 2 26 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Horizontal Scale Sets the scale of the horizontal axis number of codes Horizontal Start Sets the code number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Ver
22. Uplink TS Pattern Specifies which timeslots are the active uplink timeslots The uplink timeslot pattern is a concatenation of the uplink timeslots For example an uplink TS pattern of 13 indicates TS1 and TS3 are active uplink timeslots The default pattern of 123 indicates TS1 TS2 and TS3 are active uplink timeslots Integer patterns between 1 and 123456 are valid This setting is used when the Time Reference is set to Uplink TS Pattern NOTE UpPts can also be active but does not need to be explicitly listed Downlink signals can not be active when using the pattern method to determine subframe timing WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Active Timeslot Threshold dB Sets the threshold that determines if a timeslot is active or inactive A timeslot that is transmitting above this level is considered active Limits Displays the limits editor to set the pass fail limits for measure ments The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot Refer to Editing the Measurement Limits on page 2 65 for more information NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the scale settings for the display Changing the View You can change the contents in the view using the VIEW DEFINE menu Press Contents the VIEW DE
23. lt boolean gt ON OFF 1 0 ON or 1 enables the PEAK EVM limit testing OFF or 0 disables the PEAK EVM limit testing DEMTD_SCDMA SENSe TD SCDMA MACCuracy LIMit EVM PEAK STATe ON enables the PEAK EVM limit testing for the modulation accuracy measurement in TD SCDMA analysis SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe Syntax Arguments Measurement Modes Example 3 84 Sets or queries whether to enable or disable the RMS EVM limit testing for the modulation accuracy measurement in the TD SCDMA analysis SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe lt boolean gt SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe lt boolean gt ON OFF 1 0 ON or 1 enables the RMS EVM limit testing OFF or 0 disables the RMS EVM limit testing DEMTD_SCDMA SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe ON enables the RMS EVM limit testing for the modulation accuracy measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_ SCDMA MACCuracy LIMit PCDerror STATe Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the peak code domain error limit testing for the code domain power measurement in the TD SCDMA analysis NOTE This command is for the peak code domain error limit testing and does not affect modulation accuracy MACCuracy measurements SENSe TD_SCDMA MACCuracy LIMit PCDerror S
24. uplink pilot TS1 TS2 TS3 TS4 TS5 and TS6 The timeslot selection is a global setting for all TD SCDMA demodulation and RF measurements The timeslot selection whether it s an uplink or downlink timeslot also affects the which limits editor menu is displayed uplink or downlink After allowing the instrument to analyze a number of subframes you can use this control to view the measurement results for a different timeslot Sets the channelization code in the timeslot for the measurement The channelization codes in TD SCDMA are called Orthogonal Variable Spreading Factor OVSF codes and can have spreading factors from 1 to 16 You can select codes from 0 to 15 based on a spreading factor of 16 If you want to select a code with a lower spreading factor than 16 you can choose any of the daughter codes at spreading factor 16 to select the mother code at the lower spreading factor For example to select code 1 at spreading factor 2 you could select any code from 8 to 15 since these 8 codes are the daughter codes of this mother code Turns the highlighting on for the TPC and SS bits in the Data 2 burst Turns the highlighting off for the TPC and SS bits in the Data 2 burst Configures the symbol measurement to assume a TPC and SS symbol length of one Configures the symbol measurement to assume a TPC and SS symbol length of 16 divided by the spreading factor WCA230A amp WCA280A TD SCDMA Analysis Software SE ae eee Editi
25. IQ_Offset gt lt NRf gt IQ Offset dB 3 42 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands MACCuracy lt Num_digit gt lt Num_byte gt lt Iposition 1 gt lt Qposition 1 gt lt Iposition n gt lt Qposition n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Iposition n gt and lt Qposition n gt is the I Q position of each symbol Four byte little endian floating point format specified IEEE 488 2 Measurement level Chip n Max 848 SCONSte lt Num_digit gt lt Num_byte gt lt Iposition 1 gt lt Qposition 1 gt lt Iposition n gt lt Qposition n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Iposition n gt and lt Qposition n gt is the I Q position of each symbol Four byte little endian floating point format specified IEEE 488 2 Measurement level Chip n Max 704 EVM lt Num_digit gt lt Num_byte gt lt EVM 1 gt lt EVM n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt EVM n gt is EVM of each symbol Four byte little endian floating point format specified IEEE 488 2 Measurement level Chip n Max 704 MERRor lt Num_digit gt lt Num_byte gt lt Merror 1 gt
26. SCDMA measurements All listed specifications are guaranteed unless labeled with typical Typical specifications are provided for your convenience but are not guaranteed Table A 1 General specifications Characteristics Modulation format Minimum carrier power at RF Input Frequency range Description QPSK 60 dBm 1850 MHz to 2200 MHz Table A 2 Measurement specifications Characteristics Channel power measurement Absolute power measurement accuracy Relative power measurement accuracy Resolution ACLR measurement Dynamic range 1 6 MHz offset 3 2 MHz offset WCA230A amp WCA280A TD SCDMA Analysis Software Description 0 6 dB typical Conditions 20 C to 30 C excluding mismatch error Signal power at 10 dBm to 30 dBm After Auto Level is performed at 5 MHz span 0 2 dB typical Conditions 20 C to 30 C excluding mismatch error Signal power 0 dBm to 30 dBm After Auto Level is performed at 5 MHz span 0 01 dBm Conditions Input Power gt 20 dBm 3GPP test signal with 8 DPCH in timeslots 4 5 and 6 60 dB 61 dB A 1 Appendix A Specifications Table A 2 Measurement specifications cont Characteristics Code Domain Power Relative code domain power accuracy At code power gt 10 dBc At code power gt 25 dBc Code domain error Modulation accuracy Residual EVM Frequency error accuracy Frequency lock range Residual Q Offset CCDF Histogram
27. SCOFfset SENSe TD_SCDMA IM LIMit TORDer STATe SENSe TD_SCDMA IM LIMit FORDer STATe SENSe TD_SCDMA SEMask subgroup SENSe TD_SCDMA SEMask BANDwidth BWIDth INTegration SENSe TD_SCDMA SEMask FILTer TYPE SENSe TD_SCDMA SEMask MEASurement SENSe TD_SCDMA SEMask RCHannel MODE SENSe TD_SCDMA SEMask DIRection SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 2 3 4 5 STATe SENSe TD_SCDMA SEMask LIMit SPurious ZONE 1 2 3 4 5 STATe SENSe TD_SCDMA TOOMask subgroup SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe SENSe TD_SCDMA OBWidth Subgroup SENSe TD_SCDMA OBWidth PERcent SENSe TD_SCDMA OBWidth LIMit STATe WCA230A amp WCA280A TD SCDMA Analysis Software Default settings None No RootRaiseCosine Yes Yes No Yes No 1 28 MHz None 1 6 MHz Yes Yes 1 28 MHz None OffsetFromChannel Auto Downlink Yes Yes Yes Yes 99 Yes B 3 Appendix B Factory Default Settings B 4 WCA230A amp WCA280A TD SCDMA Analysis Software ey eee Appendix C Setting Range This section lists the setting range of the horizontal and vertical scale for the views Table C 1 Display format and scale Display format Spectrum Spectrogram Code domain power CDP versus subframe CDP versus symbol CDP codogram Composite constellation Symbol constellation EVM Mag
28. SEM Offset From Channel limit editor menu Perform the following steps to set measurement limits in the limits editor 1 2 Press the Select column to edit side key Turn the general purpose knob or press the up down arrow keys to select the column that you want to edit Press the Enable side key to enable or disable use of the limits for the zone Press the side key corresponding to the limit item and then use the general purpose knob or the up down arrow keys to set the value Press the Default limits side key if you want to reset all limits of the displayed limits table to their default values Refer to Measurement Limit Defaults on page 2 72 for the default settings of each measurement limit Press the Rescale Graph side key to scale the graph to match the new limits WCA230A amp WCA280A TD SCDMA Analysis Software Editing the Measurement Limits Saving and Loading Measurement Limits Saving Measurement Limits Loading Measurement Limits Measurement limits set in the measurement limits editor can be saved as a file and loaded from a file Both the uplink and downlink limits are saved in the same file This section describes how to save and load measurement limits Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for further information about file operation including how to enter a file name and how to delete a file Perform the following steps to save the current me
29. SVIew X SCALe OFFSet lt numeric_value gt DISPlay TD_SCDMA DDEMod SVIew X SCALe OFFSet lt numeric_value gt lt NRf gt specifies the minimum horizontal value in the subview The valid range depends on the display format Refer to Table C 1 in Appendix C DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software 3 27 GPIB Commands Example DISPlay TD SCDMA DDEMod SVIew X SCALe OFFSet 10 sets the minimum horizontal value to 10 chips when the subview displays EVM under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod SVIew FORMat DISPlay TD_SCDMA DDEMod SVlew X SCALe PDIVision Sets or queries the horizontal or time scale per division in the subview Syntax DISPlay TD_SCDMA DDEMod SVIew X SCALe PDIVision lt numeric_value gt DISPlay TD_SCDMA DDEMod SVIew X SCALe PDIVision NOTE This command is available when DISPlay TD_SCDMA DDE Mod SVlew FORMat is set to TPVTime LPVTime or SPVTime Arguments lt numeric_value gt lt NRf gt specifies the horizontal scale in the subview Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew X SCALe PDIVision lus sets the horizontal scale to 1 us div in the subview under the TD SCDMA standard DISPlay TD_SCDMA DDEMod SVlew X SCALe RANGe Sets or queries the full scale value of the horizontal axis in the subview during the digital modulation related measurement NOTE This command is n
30. TD SCDMA analysis Syntax SENSe TD_SCDMA ANALysis REFerence TFPHase MIDamble DWPTs SENSe TD_SCDMA ANALysis REFerence TFPHase Arguments The arguments and descriptions are listed below Argument Description MIDamble Frequency Phase information is independently calculated for each timeslot DWPTs The freq and phase frequency is determined based upon the frequency phase and position in the multiframe of the downlink pilot Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA ANALysis REFerence TFPHase DWPTs sets the frequency and phase frequency to be determined by the downlink pilot in the TD SCDMA analysis SENSe TD_SCDMA ANALysis REFerence TIME Sets or queries the time reference for the Channel Power ACLR Intermodula tion and Occupied Bandwidth measurements in the TD SCDMA Analysis Syntax SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern DWPTs SENSe TD_SCDMA ANALysis REFerence TIME Arguments The arguments and descriptions are listed below Argument Description UTSPattern The subframe timing is determined by matching the detected timeslot pattern specified by SENse TD_SCDMA ANALy sis REFerence TIME USTPattern command DWPTs The downlink pilot is expected and is used to determine subframe timing Measurement Modes DEMTD_SCDMA Example SENSe TD_ SCDMA ANALysis REFerence TIME DWPTs Sets the time reference to use the downlink pilot for subframe timing WCA230A am
31. TD SCDMA Analysis Software 2 1 Functional Overview Accessing a Measurement Function All of the measurement functions available in Option 28 can be selected from the DEMOD demodulation mode Perform the following procedure to access any of the measurement functions 1 Press the DEMOD menu key to open the DEMOD menu 2 Press the Standard side key to open the Standard menu 3 Press the TD SCDMA side key to select the TD SCDMA standard and open the MEASURE menu for the standard 4 Press a side key to select the measurement that you want to perform If the desired measurement is not displayed on the current MEASURE menu press the Go to page side key to go to the next MEASURE menu page 5 If needed set the frequency span and amplitude of the input signal Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information on how to set frequency span and amplitude NOTE Most TD SCDMA measurements are optimized for a 2 MHz or 5 MHz span Versatile Display Capability 2 2 The display of the WCA230A amp WCA280A analyzers with Option 28 provide you with a versatile tool for viewing different aspects of a measurement domain or viewing two different measurement domains When two measurements of the same domain are displayed in the subview and mainview such as two views from the modulation accuracy domain the measurement markers are linked together Placing a measurement
32. WCA230A amp WCA280A TD SCDMA Analysis Software Editing the Measurement Limits Table 2 6 Uplink main table default limits cont Limit item ACLR 2nd Upper Channel Intermod 3rd Order Intermod 5th Order Composite RMS EVM Composite Peak EVM Peak Code Domain Error Rho OBW Tx OFF Level Tx OFF Mid Ramp Level Table 2 7 Downlink SEM offset from channel default limits Zone Enable Beginning Frequency Ending Frequency Measurement Bandwidth Offset from Carrier Fail if signal exceeds Beginning Absolute Limit Ending Absolute Limit Beginning Relative Limit Ending Relative Limit Table 2 8 Uplink SEM offset from channel default limits Zone Enable Beginning Frequency Ending Frequency Measurement Bandwidth Offset from Carrier Fail if signal exceeds WCA230A amp WCA280A TD SCDMA Analysis Software Units dB dBc dBc percent percent dB N A Hz dBm dBm E No 4 MHz 7 5 MHz 1 MHz Both Absolute 19 5 dBm 19 5 dBm 30 dBc 30 dBc E No 3 5 MHz 7 5 MHz 1 MHz Both Absolute 2 73 Editing the Measurement Limits Table 2 8 Uplink SEM offset from channel default limits cont Zone Beginning Absolute Limit Ending Absolute Limit Beginning Relative Limit Ending Relative Limit A 55 dBm 55 dBm 35 dBm 49 dBc B 55 dBm 55 dBm 49 dBc 54 dBc Table 2 9 Downlink SEM inband spurious default limits Zone Enable Beginning Frequency Ending Fr
33. be explicitly listed Downlink signals can not be active when using the pattern method to determine subframe timing Limits Displays the limits editor to set the pass fail limits for measure ments The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot Refer to Editing the Measurement Limits on page 2 65 for more information NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the scale settings for the display You can change the contents in the view using the VIEW DEFINE menu Press the DEFINE key to display the VIEW DEFINE menu Grid Style Sets the grid style in the view You can select Off Fix or Flex For Flex the grid is changed depending on frequency or span setting Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key You can set the scale of the display using the VIEW SCALE menu Press the SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Sets the scale of the horizontal axis number of chips or symbols Horizontal Start Sets the chip number or symbol number of the first left value of the horizontal axis m Vertical Scale Sets the scale of the vertical axis m Vertica
34. in the TD SCDMA analysis SENSe TD_SCDMA IM LIMit FORDer STATe lt boolean gt SENSe TD_SCDMA IM LIMit FORDer STATe lt boolean gt ON OFF 1 0 ON or 1 enables the fifth order limit testing OFF or 0 disables the fifth order limit testing DEMTD_SCDMA SENSe TD SCDMA IM LIMit FORDer STATe ON enables the fifth order limit testing for the intermodulation measurement in the TD SCDMA analysis SENSe TD_ SCDMA IM LIMit TORDer STATe Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the third order limit testing for the intermodulation measurement in the TD SCDMA analysis SENSe TD_SCDMA IM LIMit TORDer STATe lt boolean gt SENSe TD_SCDMA IM LIMit TORDer STATe lt boolean gt ON OFF 1 0 ON or 1 enables the third order limit testing OFF or 0 disables the third order limit testing DEMTD_SCDMA SENSe TD SCDMA IM LIMit TORDer STATe ON enables the third order limit testing for the intermodulation measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 89 GPIB Commands SENSe TD_SCDMA IM SCOFfset Syntax Arguments Measurement Modes Example 3 90 Sets or queries the second channel frequency for the intermodulation measure ment in the TD SCDMA analysis SENSe TD_SCDMA IM SCOFfset lt numeric_value gt SENSe TD SCDMA IM SCOFfset lt numeric_value gt lt NRf gt sp
35. is set to ABSolute selects Absolute power value 4 byte little endian floating point format specified IEEE 488 2 n Max 704 DEMTD_SCDMA FETCh TD SCDMA CDPower RESult might return 1 4 3042E 001 0 4 3042E 001 0 4 3042E 001 0 2 as the results of the code domain power measurement of the TD SCDMA standard INSTrument SELect FETCh TD_SCDMA CHPower 3 40 Syntax Arguments Returns Measurement Modes Example Related Commands Returns the results of the channel power measurement under the TD SCDMA standard FETCh TD_SCDMA CHPower None lt Pass_fail gt lt chpower gt lt power_density gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Chpower gt lt NRf gt is the channel power measured value in dBm lt Power_density gt lt NRf gt is the power density measured value in dBm Hz DEMTD_SCDMA FETCh TD_SCDMA CHPower might return 1 2 0339E 001 8 1238E 001 for the channel power measure ment under the TD SCDMA standard INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands FETCh TD_SCDMA IM Returns the results of the intermodulation measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA IM Arguments None Returns lt Pass _fail gt lt L_channel gt lt U_channel gt lt L3_lower gt lt L3_upper gt lt U3_lower gt lt U3_Upper gt lt L5_lower gt lt L5_upper gt lt U5_lower gt lt U5_
36. mask shown Figure 2 23 Transmit on off mask Display Elements The following information is shown in the timeslot summary measurement display m Overview The overview display area can contain the power versus time or spectrogram measurement displays m Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spectrum display WCA230A amp WCA280A TD SCDMA Analysis Software 2 51 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 52 Parameters Changing the View Contents m Mainview The mainview display area is fixed to display only the transmit on off mask measurement To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 52 for more information You can set timing parameters for the transmit on off mask acquisition by using the TIMING menu Press the TIMING key to open the menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements You can set the measurement parameters for the transmit on off mask measure ments by using the MEAS SETUP menu Press the MEAS SETUP key to open the menu Refer to Measurement Parameters for Demodulation Measurements beginning on page 2 62 for a des
37. minimum vertical value to 100 dBm in the spectrum view under the TD SCDMA standard DISPlay TD_SCDMA SPECtrum Y SCALe PDIVision Sets or queries the vertical or power scale per division in the spectrum view Syntax DISPlay TD _SCDMA SPECtrum Y SCALe PDIVision lt numeric_value gt DISPlay TD SCDMA SPECtrum Y SCALe PDIVision Arguments lt numeric_value gt lt NRf gt specifies the vertical scale in the spectrum view Range 0 to 10 dB div Measurement Modes DEMTD_SCDMA Example DISPlay TD SCDMA SPECTrum Y SCALe PDIVision 10dB sets the vertical scale to 10 dB div in the spectrum view under the TD SCDMA standard 3 36 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands FETCh Commands The FETCh commands retrieve the measurements from the data taken by the latest INITiate command If you want to perform a FETCh operation on fresh data use the READ commands beginning on page 3 63 The READ commands acquire a new input signal and fetch the measurement results from the data Command Tree FETCh TD_SCDMA ACLR CDPower RESult CDPower CHPower IM MACCuracy RESult MACCuracy SCONste EVM MERRor PERRor OBWidth SEMask SFSummary STAB1e TOOMask TSSummary SPECtrum ACLR CHPower IM OBWidth SEMask TAMP1itude SFSummary TOOMask TSSummary WCA230A amp WCA280A TD SCDMA Analysis Software 3 37 GPIB Commands FETCh TD_SCDMA A
38. or queries the enable or disable transmit on off limit checking for the transmit on off mask measure ment in the TD SCDMA analysis Sets or queries the enable or disable transmit on off mid ramp level limit checking for the transmit on off mask measurement in the TD SCDMA analysis Queries which limit table is used for the occupied bandwidth measurement in the TD SCDMA analysis Sets or queries whether to enable or disable the limit testing for the occupied bandwidth measurement Sets or queries the occupied bandwidth for the occupied bandwidth measurement Use these commands to manipulate files on the hard disk or floppy disk Table 3 6 MMEMory commands Header MMEMory LOAD LIMit MMEMory STORe LIMit MMEMory STORe STABle Description Loads the limit from the specified file Stores the limit in the specified file Stores the symbol table in the specified file WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands CONFigure Commands The CONFigure commands set up the analyzer to the default settings for the specified measurement under the TD SCDMA standard Command Tree CONFigure TD_SCDMA ACLR CDPower CHPower IM MACCuracy OBWidth SEMask SFSummary STABle TOOMask TSSummary CONFigure TD_SCDMA ACLR Sets up the analyzer to the default settings for the ACLR measurement under the TD SCDMA standard Syntax CONFigure TD_SCDMA ACLR Arguments None Measurement Modes D
39. resolution A 2 Description Conditions Input power gt 40 dBm 0 15 dB 0 075 dB typical 0 30 dB 0 15 dB typical Residual error lt 40 dB Conditions Input power gt 40 dBm lt 1 5 Conditions Input level gt 40 dBm 3GPP test signal with 1 DPCH in timeslots 4 5 and 6 10 Hz center frequency accuracy 4 kHz Conditions Input level gt 40 dBm lt 40 dB Conditions Input level gt 40 dBm 3GPP test signal with 1 DPCH in timeslots 4 5 and 6 0 01 dB WCA230A amp WCA280A TD SCDMA Analysis Software EEE a Eee Appendix B Factory Default Settings Tables B 1 and B 2 list the factory default settings of the remote commands These default settings can be set by using the RST command Table B 1 Factory default settings DISPlay commands Header Default settings DISPlay TD_SCDMA DDEMod MView subgroup DISPlay TD_SCDMA DDEMod MVlew FORMat Waveform DISPlay TD_ SCDMA DDEMod MVlew X SCALe OFFSet 10 DISPlay TD_SCDMA DDEMod MVlew X SCALe PDIVision 100 ms DISPlay TD_ SCDMA DDEMod MVlew Y SCALe OFFSet 0 DISPlay TD_SCDMA DDEMod MVlew Y SCALe PDIVision 100 dB DISPlay TD_SCDMA DDEMod MVlew Y SCALe PUNit dBm DISPlay TD_SCDMA DDEMod SView subgroup DISPlay TD_SCDMA DDEMod SVlew X SCALe 0FFSet 0 DISPlay TD_SCDMA DDEMod SVlew X SCALe PDIVision 5 MHz DISPlay TD_SCDMA DDEMod SVlew Y SCALe OFFSet 20 DISPlay TD_SCDMA DDEMod SV
40. the MEAS SETUP menu Most of the SEM measurement parameters are not shared with other measurements Press the MEAS SETUP key to open the menu m Transmit Direction Selects which limits table uplink or downlink is used for limit checking Changing the transmit direction for the SEM measure ment may change the timeslot selection for other measurements depending on how the timeslots are defined for uplink and downlink Measurement Selects the SEM measurement and limits table Offset From Channel The Offset From Channel limits are used where the frequency zones are specified by the difference from the center frequency Inband Spurious The Inband Spurious limits are used where the frequency zones are specified by the absolute frequency values 2 44 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Ref Channel Select Selects the reference mode used to measure the spectrum emission level You can select Auto or Man manual For Auto the reference level is measured from the input signal for the specified channel bandwidth For Man you can set the reference level in the Ref Channel Level menu item Ref Channel Level dBm Sets or displays the reference level used to measure the spectrum emission level You can only set the reference level when the Ref Channel Select is set to Man manual with a range from 150 dBm to 30 dBm Channel Bandwidth Hz Sets the channel bandwidth for the measure
41. the main view during the TD SCDMA analysis NOTE This command is only valid when DISPlay TD_SCDMA DDEMod MVlew FORMat is set to STABle DISPlay TD_SCDMA DDEMod MVIew RADix BINary OCTal HEXadecima DISPlay TD_SCDMA DDEMod MVIew RADi x The arguments and base display are listed below Argument Base BINary Binary notation OCTal Octal notation HEXadecimal Hexadecimal notation DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew RADix BINary sets the main view display to show the symbols in binary under the TD SCDMA standard DISPlay TD_SCDMA DDEMod MVlew X SCALe OFFSet Syntax Arguments Measurement Modes Sets or queries the minimum horizontal value left end in the main view during the digital modulation related measurement NOTE This command is not available when DISPlay TD_SCDMA DDE Mod MVIew FORMat is set to MACCuracy DISPlay TD_SCDMA DDEMod MVIew X SCALe OFFset lt numeric_value gt DISPlay TD _SCDMA DDEMod MVIew X SCALe OFFset lt numeric_value gt lt NRf gt specifies the minimum horizontal value in the main view The valid range depends on the display format Refer to Table C 1 in Appendix C DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Example Related Commands DISPlay TD SCDMA DDEMod MVIew X SCALe OFFSet 10 sets the minimum horizontal value to 10 chips when the main view displays EVM under the TD SCDMA standard DISPlay T
42. the radix for displaying the table You can select Hex hexadecimal Oct octal or Bin binary WCA230A amp WCA280A TD SCDMA Analysis Software 2 57 TD SCDMA Measurements intermodulation Measurement The intermodulation measurement measures the distortion the base station generates when both the desired signal and an interfering signal are present For this measurement an interfering signal is defined as being synchronized with the desired signal and is 30 dB lower Figure 2 26 shows an example of the intermodulation measurement Tektronix WCA 280A Frequency Span Input Att 105 dBm Center 1 5 GHz dBc upper Lower Channel Upper Channel Measurement Lower 3rd Order results Upper 3rd Order Lower 5th Order Upper 5th Order TD SCDMA Intermodulation Figure 2 26 Intermodulation measurement Setting the Timing The intermodulation measurement only operates in freerun mode and therefore Parameters does not display timing settings when pressing the TIMING menu Timeslot alignment from the start of a subframe for the channel power measurement is determined by analyzing a sufficiently long IQ capture Setting the Span You can set the following measurement parameters using the SPAN menu Press Parameters the SPAN key to open the SPAN menu m Span Hz Sets frequency range to be analyzed This affects the number of channels that are analyzed 2 58 WCA230A amp WCA280A TD SCDMA Analysis Software
43. values peak Frequency Error 1 Q Imbal 1 Q Offset Expanded measurement results displayed when mainview is selected Figure 2 6 Comp constellation display 2 12 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Measurement Content Selects vector or constellation display Vector Selects vector display A signal represented with phase and amplitude is displayed in rectangular I and Q coordinates Each red point indicates a symbol position on the measured signal and the yellow trace indicates the locus of the signal between symbols Constellation Selects constellation display It is the same as the vector display except that only symbols of the measured signal are indicated in red and the locus between symbols is not shown NOTE I and Q signals are normalized to prevent the scale from changing when signal attenuation changes WCA230A amp WCA280A TD SCDMA Analysis Software 2 13 TD SCDMA Measurements Symbol Constellation Display When you select Mainview Content from the VIEW DEFINE menu and then select Symbol Constellation from the Mainview Content submenu an IQ rectangular graph is displayed showing the constellation for Datal and Data2 symbols selected by the currently selected code set in the Meas Setup menu See Figure 2 7 The measured values for modulat
44. view of one domain in the subview and a measurement display of another domain in the mainview gives you the ability to monitor both at the same time WCA230A amp WCA280A TD SCDMA Analysis Software Functional Overview Tektronix WCA 280A 10 8 04 1 0 Span Input Att ALR Demod Frequency Timeslot TSO DL Peak Active CDE Code Domain Error Number of Active Channels 4 TD SCDMA Code Domain Power Figure 2 2 Measurements of same domain interact WCA230A amp WCA280A TD SCDMA Analysis Software Measurements within same domain interact Moving the marker in the subview moves the marker in the other two views 2 3 Functional Overview Tektronix WCA 280A 4 i i PAUSE Frequency Span Input Att Measurement from code gt domain displayed in subview Comp E M rms peak Rho F Measurement from Comp Mag Error rms modulation accurac peak s y Frequency Error domain displayed in I Q Imbal 0 mainview 1 Q Offset TD SCDMA Modulation Accuracy Figure 2 3 Instrument capable of displaying multiple domains 2 4 WCA230A amp WCA280A TD SCDMA Analysis Software ES ae TD SCDMA Measurements This section describes the functions and features of the TD SCDMA measure ments Each measurement description contains general information about the measurement descriptions of the measurement displays and functions available through menu selections The information is
45. 0 is the measurement result 1 Pass or 0 Fail lt obw gt lt NRf gt is the occupied bandwidth in Hz DEMTD_SCDMA FETCh TD_SCDMA OBWidth might return 1 1 27333E 006 for the OBW measurement under the TD SCDMA standard INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands FETCh TD_SCDMA SEMask Fetches the results of the spectrum emission mask measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA SEMask Arguments None Returns lt Pass_fail gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail Measurement Modes DEMTD_SCDMA Example FETCh TD_SCDMA SEMask might return 1 indicating that the spectrum emission mask measurement has passed Related Commands INSTrument SELect FETCh TD_SCDMA SFSummary Fetches the results of the subframe summary measurement under the TD SCDMA standard NOTE There is no READ subsystem for the SFSummary command Syntax FETCh TD_ SCDMA SFSummary Arguments None Returns lt Sync DL gt lt Sync_UL gt lt Scrambling Code gt lt Switching Point gt lt DwPts_Pattern gt lt Multiframe_Position gt lt DwPts_RMS_Power gt lt UpPts_RMS_ Power gt lt GP_RMS_Power gt Where lt Sync_DL gt lt NR1 gt Downlink Pilot Syne DL lt Sync_UL gt lt NR1 gt Uplink Pilot Sync UL lt Scrambling Code gt lt NR1 gt Scrambling Code lt Switching Point gt lt NR1 gt Swi
46. 010 01011100 10 10010111 00110100 10100101 11001101 00101001 44i1nnid ninninin niniiinn TD SCDMA Symbol Table Figure 2 25 Symbol table display Display Elements The following information is shown in the symbol table measurement display m Overview The overview display area can contain the power versus time or spectrogram measurement displays Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spectrum display m Mainview The mainview display area is fixed to display only the symbol table To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 56 for more information WCA230A amp WCA280A TD SCDMA Analysis Software 2 55 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 56 Parameters Changing the View Contents You can set timing parameters for the symbol table acquisition by using the TIMING menu Press the TIMING key to open the TIMING menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements You can set the measurement parameters for the symbol table measurement by using the MEAS SETUP menu Press the MEAS SETUP key to open the menu Refer to Measurement Pa
47. 1 0 is the measurement result 1 Pass or 0 Fail lt Terror gt lt NRf gt Timing Error chips lt D1_Power gt lt NRf gt Datal Power dBm lt D2_Power gt lt NRf gt Data2 Power dBm lt Mid_Power gt lt NRf gt Midamble Power dBm lt AverageBurst_Power gt lt NRf gt Average burst RF Power of the timeslot WCA230A amp WCA280A TD SCDMA Analysis Software 3 47 GPIB Commands dBm lt Count_of_K_Value gt lt NR1 gt Count of K value 1 to 8 lt Kn gt lt NR1 gt Kn n 1 to 8 Measurement Modes DEMTD_SCDMA Example FETCh TD_ SCDMA TSSummary might return 1 0 0E 000 1 71653E 001 1 71807E 001 1 71609E 001 1 72521E 001 2 10 16 as the results from the timeslot summary measurement under the TD SCDMA standard Related Commands INSTrument SELect FETCh TD_SCDMA SPECtrum ACLR Returns the results of the adjacent channel leakage power ratio measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA SPECtrum ACLR Arguments None Returns lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Measurement Modes DEMTD_SCDMA Example FETCh TD _SCDMA SPECtrum ACLR might return 510240
48. 3 Figure 2 12 Code domain power display eeeeees 2 26 Figure 2 13 CDP by subframe display ceeeeeees 2 28 Figure 2 14 CDP by symbol display cece ceeeeees 2 29 Figure 2 15 CDP codogram display ceeeeececeees 2 31 Figure 2 16 Channel power measurement eeeee0 2 33 Figure 2 17 OBW measurement 0 cece cece eee eeee 2 36 Figure 2 18 ACLR measurement cece ee ee eee eee 2 39 Figure 2 19 Spectrum emission mask offset from channel MNEASUTEMICME esse oi pieced OF ata oe wale Sea eben ola eevete rare Bla a s 2 43 Figure 2 20 Spectrum emission mask inband spurious MNEASUTEMIOME e se Geese EE EE Bia oe wre Eels Ra We lala 2 44 Figure 2 21 Timeslot summary 0c eece cere eeeee 2 47 Figure 2 22 Timeslot summary display zoomed 2 50 Figure 2 23 Transmit on off mask cc cece cere eens 2 51 Figure 2 24 Zoom to Max Mid Ramp Power selected 2 54 Figure 2 25 Symbol table display 0 cece cece ceees 2 55 Figure 2 26 Intermodulation measurement 02005 2 58 Figure 2 27 Measurement limits editor cece eeeee 2 66 Figure 2 28 Spectrum emission mask measurement limits editor 2 69 WCA230A amp WCA280A TD SCDMA Analysis Software v Table of Contents List of Tables Table 2 1 Global demodulation timing parameter settings 2 61 Table 2 2 Global demodulati
49. 3 35 3 35 3 35 3 36 3 36 3 37 3 38 3 38 3 40 3 41 3 42 3 44 3 45 3 45 3 46 WCA230A amp WCA280A TD SCDMA Analysis Software Table of Contents FETCh TD_SCDMA TOOMask 2 0 0 0 eA cc cece eens 3 47 FETCh TD_SCDMA TSSummary serorari rer OEEren EEEE NEERA 3 47 FETCh TD_SCDMA SPECtrum ACLR ori rea teere nen oe eee eee 3 48 FETCh TD_SCDMA SPECtrum CHPower 0 00 0 cee eee 3 48 FETCh TD_SCDMA SPECtrum IM r vrer eea teere nen e a a 3 49 FETCh TD_SCDMA SPECtrum OBWidth 0 00 0 0008 3 50 FETCh TD_SCDMA SPECtrum SEMask 0 0 0000 e eee 3 50 FETCh TD_SCDMA TAMPlitude SFSummary 00 0 0000 3 51 FETCh TD_SCDMA TAMPlitude TOOMask 00 00008 3 52 FETCh TD_SCDMA TAMPlitude TSSummary 05 3 52 READ Commands SeCererererer errr ree ee eer er eee eee 3 54 READ TD_SCDMA ACLR risati E ccc cece cent eee n eens 3 55 READ TD_SCDMA CHPower 2 0 0 00 0c ccc ccc cece eens 3 55 tSREAD TD_SCDMA IIM ieie rinier a EEE REEE Ea eee eens 3 56 READ TD SCDMA OBWI ID eiei tore cece eee eee 3 57 READ TD SCDMA SEMaS k oaie a EEE ce cee ees 3 57 READ TD_SCDMA SPECtrum ACLR essssssssssssrrrrrrrrrrnne 3 58 READ TD_SCDMA SPECtrum CHPower 0 00 cee cece cee eee 3 58 READ TD_SCDMA SPECtrum IM 2 0 0 0 ccc cc cee eee 3 59 READ TD_SCDMA SPECtrum SEMask 00 000 c eee ee eee 3 59 READ TD_SCDMA SPECtrum OBWi
50. 80A 44 4 v MEASURE Frequency Span Input At 10 dB Measurement Channel Power 19 67 dBm Timeslot results Power Spectral Density 71 dBm Hz Channel Bandwidth 6 Go to page 2 TD SCDMA Channel Power The channel power measurement measures the channel power within a specified bandwidth and the power spectral density in dBm Hz The channel power measurement is a single view display unlike the demodula tion measurements such as modulation accuracy or code domain power The channel power measurement cannot be displayed in the subviews of the demodulation measurements Figure 2 16 shows an example of the channel power measurement Cancel Back Subframe Summary Modulation Accuracy Code Domain Power Channel Power OBW ACLR a Measurement Off of 2 Figure 2 16 Channel power measurement Setting the Timing Parameters The channel power measurement only operates in freerun mode and therefore does not display timing settings when pressing the TIMING menu Timeslot alignment from the start of a subframe for the channel power measurement is determined by analyzing a sufficiently long IQ capture WCA230A amp WCA280A TD SCDMA Analysis Software 2 33 TD SCDMA Measurements Setting the Measurement 2 34 Parameters Once you ve selected the channel power measurement you can set the measure ment parameters for the channel power using the MEAS SETUP menu Most of the channel powe
51. A SENSe TD_SCDMA SEMask LIMit 1SPurious ZONE1 STATe ON enables the offset from the inband spurious limit testing of the zone 1 for the spectrum emission mask measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 2 3 4 5 STATe 2 Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the offset from the channel zone limit testing for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 2 3 4 5 STATe lt boolean gt SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 2 3 4 5 STATe Zones 1 2 3 4 and 5 correspond to Zones A B C D and E in the limit editor respectively lt boolean gt ON OFF 1 0 ON or 1 enables the offset from the channel zone limit testing OFF or 0 disables the offset from the channel zone limit testing DEMTD_SCDMA SENSe TD_SCDMA SEMask LIMit OFCHannel ZONE 1 STATe ON enables the offset from the channel limit testing of the zone 1 for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask MEASurement Syntax Arguments Measurement Modes Example Sets or queries the limit table type used for limit testing for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask MEASurement OFCHannel 1SPuriou
52. A standard INSTrument SELect GPIB Commands CONFigure TD_SCDMA SFSummary Syntax Arguments Measurement Modes Example Related Commands Sets up the analyzer to the default settings for the subframe summary measure ment under the TD SCDMA standard CONFigure TD SCDMA SFSummary None DEMTD_SCDMA CONFigure TD SCDMA SFSummary Sets up the analyzer to the default settings for the subframe summary measure ment under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA STABle Syntax Arguments Measurement Modes Example Related Commands Sets up the analyzer to the default settings for the symbol table under the TD SCDMA standard CONFigure TD SCDMA STABle None DEMTD_SCDMA CONFigure TD SCDMA STABle Sets up the analyzer to the default settings for the symbol table under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA TOOMask Syntax Arguments Measurement Modes Example Sets up the analyzer to the default settings for the transmit on off mask measure ment under the TD SCDMA standard CONFigure TD SCDMA TOOMask None DEMTD_SCDMA CONFigure TD SCDMA TOOMask Sets up the analyzer to the default settings for the transmit on off mask measure ment under the TD SCDMA standard WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Related Commands INSTrument SELect CONFigure TD_SCDMA TSSummary Sets up the analyzer to the default se
53. A standard READ TD SCDMA OBWidth None lt Pass_fail gt lt obw gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt obw gt lt NRf gt is the occupied bandwidth in Hz DEMTD_SCDMA READ TD SCDMA OBWidth might return 1 1 27333E 006 for the OBW measurement under the TD SCDMA standard INSTrument SELect READ TD_SCDMA SEMask Syntax Arguments Returns Measurement Modes Example Related Commands WCA230A amp WCA280A TD SCDMA Analysis Software Obtains the results of the spectrum emission mask measurement under the TD SCDMA standard READ TD SCDMA SEMask None lt Pass_fail gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail DEMTD_SCDMA READ TD SCDMA SEMask might return 1 indicating that the spectrum emission mask measurement has passed INSTrument SELect 3 57 GPIB Commands READ TD_SCDMA SPECtrum ACLR Syntax Arguments Returns Measurement Modes Example Related Commands Obtains the results of the adjacent channel leakage power ratio measurement under the TD SCDMA standard READ TD_SCDMA SPECtrum ACLR None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four by
54. ALysis INTerval lt numeric_value gt SENSe TD_SCDMA ANALysis INTerval Arguments lt numeric_value gt lt NR1 gt specifies the analysis interval in chips The range depends on the acquisition length setting Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA ANALysis INTerval 3072 sets the analysis interval in chips to 3072 in the TD SCDMA analysis SENSe TD_ SCDMA ANALysis OFFSet CHIPs Sets or queries the analysis offset the start point of the analysis range in chips in the TD SCDMA analysis Syntax SENSe TD_SCDMA ANALysis OFFSet CHIPs lt numeric_value gt SENSe TD_SCDMA ANALysis OFFSet CHIPs Arguments lt numeric_value gt lt NR1 gt specifies the analysis offset in chips Range 65539999 to 65539999 chips Measurement Modes DEMTD_SCDMA Example SENSe TD _SCDMA ANALysis OFFSet CHIPs 512 sets the analysis offset in chips to 512 in the TD SCDMA analysis SENSe TD_SCDMA ANALysis OFFSet DFRequency Sets or queries the demod frequency offset in the TD SCDMA analysis Syntax SENSe TD_SCDMA ANALysis OFFSet DFRequency lt numeric_value gt SENSe TD_SCDMA ANALysis OFFSet DFRequency Arguments lt numeric_value gt lt NR1 gt specifies the analysis offset in MHz Range 6 5 MHz to 6 5 MHz depends on Span setting Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA ANALysis OFFSet DFRequency 3 25 sets the analysis demod frequency offset to 3 25 MHz in the TD S
55. CALe RANGe Sets or queries the full scale value of the vertical axis in the subview during the digital modulation related measurement Syntax DISPlay TD_SCDMA DDEMod SVIew Y SCALe RANGe lt numeric_value gt DISP1 ay TD_SCDMA DDEMod SVIew Y SCALe RANGe Arguments lt numeric_value gt lt NRf gt specifies the full scale value of the vertical axis in the subview The valid range depends on the display format Refer to Table C 1 in Appendix C Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew Y SCALe RANGe 100dB sets the full scale value of the vertical axis to 100 dB when the subview displays spectrum under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod SVIew FORMat WCA230A amp WCA280A TD SCDMA Analysis Software 3 31 GPIB Commands DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol STARt Syntax Arguments Measurement Modes Example Sets the zoom to the transmit mask start in the subview during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod SVIew FORMat is set to LPVTime DISPlay TD_SCDMA DDEMod SVIew ZOOM MCONtrol STARt None DEMTD_SCDMA DISPlay TD_SCDMA DDEMod SVIew ZOOM MCONtrol STARt Sets the zoom to the transmit mask start DISPlay TD_SCDMA DDEMod SVlew ZOOM MCONtrol END Syntax Arguments Measurement Modes Example 3 32 Sets the zoom to the transmit mask end in the su
56. CDMA IMMediate performs calculation for the acquired data in the TD SCDMA analysis SENSe TD_SCDMA MEASurement Selects or queries the measurement item for the TD SCDMA analysis Syntax SENSe TD_SCDMA MEASurement CHPower ACLR IM SEMask CDPower MACCuracy STABle TSSummary TOOMask OBWidth SFSummary OFF SENSe TD_SCDMA MEASurement 3 62 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Arguments The arguments and measurement items are listed below Argument CHPower ACLR IM SEMask CDPower MACCuracy STABle TSSummary TOOMask OBWidth SFSummary OFF Measurement Modes DEMTD_SCDMA Measurement item Channel power measurement Adjacent Channel Leakage power Ratio ACLR measurement Intermodulation measurement Spectrum emission mask measurement Code domain power measurement Modulation accuracy measurement Symbol table Timeslot summary Transmit on off mask measurement Occupied bandwidth measurement Subframe summary Measurement OFF Example SENSe TD SCDMA MEASurement CDP selects the code domain power measurement for the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 63 GPIB Commands SENSe TD_SCDMA ACQuisition Subgroup The SENSe TD_SCDMA commands set up the conditions related to acquisition in the TD SCDMA analysis Command Tree SENSe TD_SCDMA sACQuisition SFRames lt numeric_value gt HISTory lt numeric_value gt SECon
57. CDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 67 GPIB Commands SENSe TD_ SCDMA ANALysis OFFSet IQ Syntax Arguments Measurement Modes Example Sets or queries the EVM measurement includes the I Q offset in the TD SCDMA analysis SENSe TD_SCDMA ANALysis OFFSet 1Q lt boolean gt SENSe TD_SCDMA ANALysis OFFSet 1Q lt boolean gt ON or 1 The EVM calculation includes I Q offset OFF or 0 The EVM calculation does not include I Q offset DEMTD_SCDMA SENSe TD SCDMA ANALysis OFFSet 1Q 1 sets the analysis EVM measurement to include the I Q offset in the TD SCDMA analysis SENSe TD_SCDMA ANALysis REFerence SFRame Syntax Arguments Measurement Modes Example 3 68 Sets or queries the subframe reference in the TD SCDMA analysis SENSe TD_SCDMA ANALysis REFerence SFRame TRIGger DWPTs SENSe TD_SCDMA ANALysis REFerence SFRame The arguments and descriptions are listed below Argument Description TRIGger The trigger point is used as the start of the subframe DWPTs The downlink pilot is expected and is used to provide subframe timing DEMTD_SCDMA SENSe TD SCDMA REFerence SFRame TRIGger sets the trigger point as the start of the subframe in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA ANALysis REFerence TFPHase Sets or queries the timeslot frequency and phase reference in the
58. CDMA Analysis Software
59. CLR Syntax Arguments Returns Measurement Modes Example Related Commands Returns the results of the adjacent channel leakage power ratio measurement under the TD SCDMA standard FETCh TD SCDMA ACLR None lt Pass_fail gt lt Chpower gt or lt Pass_fail gt lt Chpower gt lt L_Aclr1 gt lt U_Aclr1 gt or lt Pass_fail gt lt Chpower gt lt L_Aclr1 gt lt U_Aclr1 gt lt L_Aclr2 gt lt U_Aclr2 gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Chpower gt lt NRf gt is the channel power measured value in dBm lt L_Aclr1 gt lt NRf gt is the first lower adjacent channel ACLR in dBc lt U_Aclr1 gt lt NRf gt is the first upper adjacent channel ACLR in dBc lt L_Aclr2 gt lt NRf gt is the second lower adjacent channel ACLR in dBc lt U_Aclr2 gt lt NRf gt is the second upper adjacent channel ACLR in dBc DEMTD_SCDMA FETCh TD SCDMA ACLR might return 0 2 045E 001 6 461E 001 4 379E 001 6 576E 001 6 753E 001 for the ACLR measurement under the TD SCDMA standard INSTrument SELect FETCh TD_SCDMA CDPower 3 38 Syntax Arguments Returns the results of the code domain power measurement under the TD SCDMA standard NOTE There is no READ subsystem for the CDPower command The command SENSe TD_SCDMA IMMediate must be executed in order to retrieve the measurement results FETCh TD _SCDMA CDPower RESult CDPower CVS
60. D_ SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew X SCALe PDIVision Syntax Arguments Measurement Modes Example Sets or queries the horizontal or time scale per division in the main view DISPlay TD_SCDMA DDEMod MVIew X SCALe PDIVision lt numeric_value gt DISPlay TD_SCDMA DDEMod MVIew X SCALe PDIVision NOTE This command is available when DISPlay TD_SCDMA DDE Mod MVIlew FORMat is set to TPVTime LPVTime or SPVTime lt numeric_value gt lt NRf gt specifies the horizontal scale in the main view DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew X SCALe PDIVision lus sets the horizontal scale to 1 us div in the main view under the TD SCDMA standard DISPlay TD_SCDMA DDEMod MVlew X SCALe RANGe Syntax Arguments Measurement Modes Sets or queries the full scale value of the horizontal axis in the main view during the digital modulation related measurement NOTE This command is not available when DISPlay TD_SCDMA DDE Mod MVlIew FORMat is set to MACCuracy DISPlay TD_SCDMA DDEMod MVIew X SCALe RANGe lt numeric_value gt DISPlay TD_SCDMA DDEMod MVIew X SCALe RANGe lt numeric_value gt lt NRf gt specifies the full scale value of the horizontal axis in the main view The valid range depends on the display format Refer to Table C 1 in Appendix C DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software 3 19 GPIB Commands Example DISPla
61. D_SCDMA MODulation CONTrol SENSe TD_SCDMA MODulation SYNC UPLink SENSe TD_SCDMA MODulation SYNC DOWNIlink SENSe TD_SCDMA MODulation SCODe SENSe TD_SCDMA MODulation SPOint SENSe TD_SCDMA MODulation K ZERO SENSe TD_SCDMA MODulation K NZERo SENSe TD_SCDMA FILTer subgroup SENSe TD_SCDMA FiLTer MEASurement SENSe TD_SCDMA CHPower subgroup SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration Default settings 15 ms 19200 0 0 Hz Yes 27 dB All Active TS 30 dB 0 MlIDamble RootRaisedCosine 1 6 MHz B 2 WCA230A amp WCA280A TD SCDMA Analysis Software Appendix B Factory Default Settings Table B 2 Factory default settings SENSe commands cont Header SENSe TD_SCDMA CHPower FlLTer TYPE SENSe TD_SCDMA CHPower LIMit STATe SENSe TD_SCDMA ACLR subgroup SENSe TD_SCDMA ACLR FILTer TYPE SENSe TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe SENSe TD_SCDMA MACCuracy subgroup SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe SENSe TD_SCDMA MACCuracy LIMit EVM PEAK STATe SENSe TD_SCDMA MACCuracy LIMit PCDerror S TATe SENSe TD_SCDMA MACCuracy LIMit RHO STATe SENSe TD_SCDMA STABle subgroup SENSe TD_SCDMA STABle TPCSs SELect SENSe TD_SCDMA STABle TPCSs COUNt SENSe TD_SCDMA IM subgroup SENSe TD_SCDMA IM BANDwidth BWIDth INTegration SENSe TD_SCDMA IM FILTer TYPE SENSe TD_SCDMA IM
62. D_SCDMA SEMask BANDwidth BWIDth INTegration SENSe TD_SCDMA SEMask DIRection SENSe TD_SCDMA SEMask LIMit SPurious ZONE 1 2 3 4 5 STATe WCA230A amp WCA280A TD SCDMA Analysis Software Queries which limit table is used for the modulation accuracy measurement in the TD SCDMA analysis Sets or queries whether to enable or disable the peak EVM limit testing for the modulation accuracy measurement Sets or queries whether to enable or disable the RMS EVM limit testing for the modulation accuracy measurement Sets or queries whether to enable or disable the peak code domain error limit testing for the code domain power measurement Sets or queries whether to enable or disable the Rho limit testing for the modulation accuracy measure ment Sets or queries the TPC and SS symbol count Sets or queries the TPC and SS in the Data2 burst Sets or queries the bandwidth of the main channel for the intermodulation measurement Queries which limit table is used for the IM measure ment in the TD SCDMA analysis Sets or queries whether to enable or disable the fifth order limit testing for the intermodulation measure ment Sets or queries whether to enable or disable the third order limit testing for the intermodulation measure ment Sets the frequency of the second channel for the intermodulation accuracy measurement Sets or queries the channel bandwidth for the spectrum emission mask measurement Set
63. EMTD SCDMA Example CONFigure TD_SCDMA ACLR Sets up the analyzer to the default settings for the ACLR measurement under the TD SCDMA standard Related Commands INSTrument SELect CONFigure TD_SCDMA CDPower Sets up the analyzer to the default settings for the code domain power measure ment under the TD SCDMA standard Syntax CONFigure TD_SCDMA CDPower Arguments None WCA230A amp WCA280A TD SCDMA Analysis Software 3 11 GPIB Commands Measurement Modes Example Related Commands DEMTD_SCDMA CONFigure TD SCDMA CDPower Sets up the analyzer to the default settings for the code domain power measure ment under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA CHPower Syntax Arguments Measurement Modes Example Related Commands Sets up the analyzer to the default settings for the channel power measurement under the TD SCDMA standard CONFigure TD SCDMA CHPower None DEMTD_SCDMA CONFigure TD SCDMA CHPower Sets up the analyzer to the default settings for the channel power measurement under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA IM Syntax Arguments Measurement Modes Example Related Commands Sets up the analyzer to the default settings for the intermodulation measurement under the TD SCDMA standard CONFigure TD SCDMA IM None DEMTD_SCDMA CONFigure TD SCDMA IM Sets up the analyzer to the default settings for the intermodulation me
64. FINE key to open the menu Grid Style Sets the grid style in the view You can select Off Fix or Flex For Flex the grid is changed depending on frequency or span setting Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Hz Sets the scale of the horizontal axis Horizontal Start Hz Sets the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale default scaling Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays when the Horizontal Start or Vertical Stop menu is selected WCA230A amp WCA280A TD SCDMA Analysis Software 2 35 TD SCDMA Measurements OBW Measurement Tektronix WCA 280A 4 AM MEASURE Frequency 1 5 GHz 2 Cancel Back Span Input Att Measurement TD SCDMA OBW Figure 2 17 OBW measurement Setting the Timing Parameters 2 36 Occupied BandWidth 1 3627 MHz results Total Power
65. Frame CVSYmbo1 RESult Measurement result CDPower Relative absolute power values of each code in a timeslot CVSFrame Relative dB Absolute dBm Power value of each selected code in each subframe CVSYmbol Relative dB Absolute dBm Power value of each code in each selected symbol WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Returns RESult lt Pass_Fail gt lt Peak_CD gt lt Peak_CD_Code gt lt Peak_ACD gt lt Peak_ACD_Code gt lt CD Error gt lt CD Error Code gt lt No_AC gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Peak_CD gt lt NRf gt is the peak code domain error value in dBm lt Peak_CD_Code gt lt NRf gt is the peak code domain error code lt Peak_ACD gt lt NRf gt is the peak active channel code domain error value in dBm lt Peak_ACD_Code gt lt NRf gt is the peak active channel code lt CD Error gt lt NRf gt is the code domain error value dB dBm lt CD Error Code gt lt NRI1 gt is the code domain error code lt No_AC gt lt NR1 gt is the number of active codes CDPower lt Num_digit gt lt Num_byte gt lt Cpower 0 gt lt Cpower 1 gt lt Cpower n 1 gt lt Cpower n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Cpower n gt is the relative dB Absolute dBm power value of each code When the u
66. Hz Timeslot TS5 DL Subframe O 1 10 dB Midamble EYM rms peak Comp EVM rms peak Rho Comp Mag Error rms peak Comp Phase Error rms peak Frequency Error 999 I Q Imbal 1 Q Offset TD SCDMA Modulation Accuracy Horizontal scale gt Expanded measurement orizont results displayed when mainview is selected Horizontal start Figure 2 9 MagErr display Symbol number Error value Selected code OVSF code Spreading factor Modulation type Vertical scale a Vertical start You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Sets the start value and the scale of the vertical axis automati cally to display the entire waveform m Horizontal Scale Sets the scale of the horizontal axis number of symbols 2 18 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Horizontal Start Sets the symbol number of the first left value of the horizontal axis m Vertical Scale Sets the scale of the vertical axis m Vertical Start Sets the start value of the vertical axis You can set the value from 200 to 200 Full Scale default scaling Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Offset Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Offset settin
67. I1 gt specifies the switching point Range 0 to 6 DEMTD_SCDMA SENSe TD SCDMA MODulation SPOint 3 sets the timeslot switching point to timeslot 3 in the TD SCDMA analysis SENSe TD_SCDMA MODulation SYNC DOWNlink Syntax Arguments Measurement Modes Example Sets or queries the the sync uplink value in the TD SCDMA analysis SENSe TD_SCDMA MODulation SYNC DOWNlink lt numeric_value gt SENSe TD_SCDMA MODul ation SYNC DOWN ink lt numeric_value gt lt NR1 gt specifies the sync downlink Range 0 to 31 DEMTD_SCDMA SENSe TD SCDMA MODulation SYNC DOWNlink 0 sets the code number of the downlink pilot pattern to 0 in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 77 GPIB Commands SENSe TD_SCDMA MODulation SYNC UPLink Syntax Arguments Measurement Modes Example 3 78 Sets or queries the the sync uplink value in the TD SCDMA analysis SENSe TD_SCDMA MODulation SYNC UPLink lt numeric_value gt SENSe TD_SCDMA MODulation SYNC UPLink lt numeric_value gt lt NRI1 gt specifies the sync uplink Range 0 to 255 DEMTD_SCDMA SENSe TD_SCDMA MODulation SYNC UPLink 0 sets the code number of the uplink pilot pattern to 0 in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA CHPower Subgroup The SENSe TD_SCDMA CHPower commands set up the conditions related to the channel pow
68. MEMory STORe LIMit C My Documents Test 1Imt stores the current limits in the file Test Imt in the My Documents folder WCA230A amp WCA280A TD SCDMA Analysis Software 3 99 GPIB Commands MMEMory STORe STABle Stores the symbol table in the specified file NOTE This command is valid only when the Symbol Table measurement is selected Syntax MMEMory STORe STABle lt file_name gt Arguments lt file_name gt lt string gt specifies the file in which to store the symbol table The file is in text format and its extension is sym The following are written in the header before the data Date and Time Modulation Symbol Rate Measurement Filter Subframe Number Timeslot Number OVSF Code Number max SF Sync DL Synce UL Scrambling Code Switching Point Timeslot 0 K Other Timeslot K Time from the data end point of the first symbol NOTE The date and time saved to the sym file is the date and time of the last analysis of the symbol table measurement If the analysis was run on a loaded signal file filename iqt then the date and time in the sym file will match the loaded iqt file Measurement Modes DEMTD_SCDMA Example MMEMory STORe STABle C My Documents Datal sym stores the symbol table in the file Datal sym in the My Documents folder 3 100 WCA230A amp WCA280A TD SCDMA Analysis Software Appendices a eee Appendix A Specifications Tables A 1 and A 2 list the characteristics of the TD
69. MVIew Y SCALe OFFSet lt numeric_value gt DISPlay TD_SCDMA DDEMod MVIew Y SCALe OFFSet 3 20 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Arguments lt numeric_value gt lt NRf gt specifies the minimum vertical value in the main view The valid range depends on the display format Refer to Table C 1 in Appendix C Measurement Modes DEMTD_SCDMA Example DISPlay TD_ SCDMA DDEMod MVIew Y SCALe OFFSet 1mPCT sets the minimum vertical value to 1m when the main view displays EVM under the TD SCDMA standard Related Commands DISPlay TD SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew Y SCALe PDIVision Sets or queries the vertical or power scale per division in the main view Syntax DISPlay TD_SCDMA DDEMod MVIew Y SCALe PDIVision lt numeric_value gt DISPlay TD_SCDMA DDEMod MVIew Y SCALe PDIVision NOTE This command is available when DISPlay TD_SCDMA DDEMod MVIew FORMat is set to TPVTime LPVTime or SPVTime Arguments lt numeric_value gt lt NRf gt specifies the vertical scale in the main view Measurement Modes DEMTD_SCDMA Example DISPlay TD SCDMA DDEMod MVIew Y SCALe PDIVision 1dBm sets the vertical scale to 1 dBm div in the main view under the TD SCDMA standard DISPlay TD_SCDMA DDEMod MVlew Y SCALe PUNit Selects or queries the unit on the Y or power axis in the main view during the digital modulation related measurement
70. MVlew FORMat Selects or queries the display format of the main view in the digital modulation related measurement DISPlay TD_SCDMA DDEMod MVIew FORMat MACCuracy SCONste EVM MERRor PERRor CDPower CVSFrame CVSYmbol PCGRam TPVTime LPVTime SPVTime STABle DISPlay TD SCDMA DDEMod MVIew FORMat The arguments and display formats are listed below Argument Display format MACCuracy Modulation accuracy SCONste Symbol constellation EVM Error vector magnitude EVM MERRor Amplitude magnitude error PERRor Phase error CDPower Code domain power CVSFrame Code domain power versus subframe CVSYmbol Code domain power versus symbol PCGRam Power codogram TPVTime Timeslot power versus time SPVTime Subframe power versus time STABle Symbol table NOTE The arguments CDPower and PCGRam are available only when the SENSe TD_SCDMA MEASurement command is set to CDPower The arguments MACCuracy EVM MERRor PERRor and STABle are available only when the SENSe TD_SCDMA MEASurement command is set to MACCuracy DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew FORMat CDPower selects the code domain power measurement under the TD SCDMA standard DISPlay TD_SCDMA DDEMod SVIew FORMat SENSe TD_SCDMA MEASurement WCA230A amp WCA280A TD SCDMA Analysis Software 3 17 GPIB Commands DISPlay TD_SCDMA DDEMod MVlew RADix Syntax Arguments Measurement Modes Example Sets or queries the base of symbols on
71. R Ranges C 7 READ commands long 3 54 READ commands short 3 6 S Saving measurement limits 2 71 Scrambling code 2 8 2 63 Select code 2 64 Select timeslot 2 64 Selected timeslot subframe summary 2 6 SENSe commands long 3 61 SENSe commands short 3 7 Service support contact information viii Setting range C 7 Specifications A 1 Spectrum emission mask measurement 2 43 Spectrum length 2 61 Spectrum offset 2 61 Subframe summary 2 6 WCA230A amp WCA280A TD SCDMA Analysis Software Index Switching point 2 8 2 63 Symbol constellation display 2 14 Symbol EVM display 2 16 Symbol table display 2 55 Sync DL 2 63 Sync UL 2 63 T TD SCDMA measurements 2 5 Technical support contact information viii Tektronix contacting viii Time reference 2 62 DwPts 2 62 trigger 2 62 Timeslot summary 2 47 Timeslot summary measurement ideal timeslot 2 50 zoom 2 49 Timeslot s to be analyzed 2 63 All active TS 2 63 Current TS only 2 63 Timing error 2 50 WCA230A amp WCA280A TD SCDMA Analysis Software TPC and SS 2 64 Transmit on off mask 2 51 zoom 2 53 Trigger 2 62 U Uplink mask transmit on off measurement 2 51 Uplink pilot 2 8 URL Tektronix viii UpPts RMS power 2 8 W Web site address Tektronix viii Wide codes 2 26 Z Zoom timeslot summary measurement 2 49 transmit on off measurement 2 53 Index 3 Index Index 4 WCA230A amp WCA280A TD S
72. S EVM Not settable 0 to 100 measurement Sets the upper limit for the Peak EVM Not settable 0 to 100 measurement Sets the upper limit for the Peak code domain Not settable 200 to 200 dB error measurement Sets the lower limit of Rho for the modulation Not settable accuracy measurement Sets the upper and lower limits for the OBW 0 to 30 MHz 0 to 30 MHz measurement Sets the upper limit of the mask region not Not settable 100 to 100 part of the mid ramp region in the transmit on off mask measurement Sets the upper limit of the mid ramp power Not settable 100 to 100 within the mid ramp region in the transmit on off mask measurement Perform the following procedure to set measurement limits Press the MEAS SETUP menu key to open the MEAS SETUP menu r Press the Limits side key to open the measurement limits menu and editor gt Press the Select row to edit side key A Turn the general purpose knob or press the up down arrow keys to select the row that you want to edit 5 Press the Enable Limit side key to enable or disable the pass fail testing for the specified limit s 6 Press the Lower Limit side key to set the lower limit for the selected measurement item if applicable WCA230A amp WCA280A TD SCDMA Analysis Software 2 67 Editing the Measurement Limits 7 Press the Upper Limit side key to set the upper limit for the selected measurement item NOTE The Default all limits sid
73. SCDMA demodulation measurements Setting the Measurement You can set the measurement parameters for the subframe summary measure Parameters ments by using the MEAS SETUP menu Press the MEAS SETUP key to open the menu Refer to Measurement Parameters for Demodulation Measurements beginning on page 2 62 for a description of the measurement parameters NOTE The measurement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle Changing the View You can change the view contents in the overview and subview using the VIEW Contents DEFINE menu Press the VIEW DEFINE key to open the menu Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the SELECT key to change the selected view m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display WCA230A amp WCA280A TD SCDMA Analysis Software 2 7 TD SCDMA Measurements Scale and Format in the Mainview Subframe Measurement 2 8 Readouts Mainview Co
74. SELect SFRame lt numeric_value gt SENSe TD_SCDMA SELect SFRame Arguments lt numeric_value gt lt NR1 gt specifies the subframe Range 0 to 2047 This is limited by the number of frames which have been analyzed Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA SELect SFRame 30 sets the selected subframe to 30 or the 30th subframe before the most recent one in the TD SCDMA analysis SENSe TD_SCDMA SELect TSLot Sets or queries the selected timeslot in the TD SCDMA analysis NOTE This command is only available when results are available for multiple subframes Syntax SENSe TD_SCDMA SELect TSLot TSON DWPTs UPPTs TSIN TS2N TS3N TS4N TS5N TS6N SENSe TD_SCDMA SELect TSLot Arguments The arguments and measurement items are listed below Argument Description TSON Timeslot 0 DWPTs Downlink pilot UPPTs Uplink pilot TSIN Timeslot 1 TS2N Timeslot 2 TS3N Timeslot 3 TS4N Timeslot 4 TS5N Timeslot 5 TS6N Timeslot 6 Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA SELect TSLot TS4N sets the analysis to timeslot 4 in the TD SCDMA analysis 3 74 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA MODulation Subgroup Command Tree The SENSe TD_SCDMA commands set up the modulation conditions related to the TD SCDMA analysis SENSe TD_SCDMA MODulation CONTrol AUTO MANual 7K NZERO lt numeric_value gt ZERO lt numeric_valu
75. Se TD_SCDMA ACQuisition SEConds SENSe TD_SCDMA ANALysis subgroup SENSe TD_SCDMA ANALysis CHANnel THReshold SENSe TD_SCDMA ANALysis INTerval SENSe TD_SCDMA ANALysis OFFSet CHIPs SENSe TD_SCDMA ANALysis OFFSet DFRequency SENSe TD_SCDMA ANALysis OFFSet 1Q SENSe TD_SCDMA ANALysis REFerence SFRame SENSe TD_SCDMA ANALysis Reference TFPHase SENSe TD_SCDMA ANALysis TSLot SENSe TD_SCDMA ANALysis TSLot THReshold SENSe TD_SCDMA SPECtrum subgroup SENSe TD_SCDMA SPECtrum OFFSet SENSe TD_SCDMA SPECtrum TINTerval SENSe TD_SCDMA SELect subgroup SENSe TD_SCDMA SELect CODE WCA230A amp WCA280A TD SCDMA Analysis Software Description Sets or queries the number of the block to be measured Sets or queries the measurement filter for the current measurement Starts the calculation for the acquired data Sets or queries the measurement item Sets or queries the acquisition length in subframes Sets or queries the acquisition history Sets or queries the acquisition length in seconds Sets or queries the threshold for the channel measurement in the TD SCDMA analysis Sets or queries the analysis interval in chips Sets or queries the analysis offset in chips Sets or queries the demod frequency offset Sets or queries the EVM includes 1 Q offset Sets or queries the subframe reference in the TD SCDMA analysis Sets or queries the subfram
76. TATe lt boolean gt SENSe TD_SCDMA MACCuracy LIMit PCDerror STATe lt boolean gt ON OFF 1 0 ON or 1 enables the peak code domain error limit testing OFF or 0 disables the peak code domain error limit testing DEMTD_SCDMA SENSe TD_SCDMA MACCuracy LIMit PCDerror STATe ON enables the peak code domain error limit testing for the code domain power measurement in the TD SCDMA analysis SENSe TD_ SCDMA MACCuracy LIMit RHOJ STATe Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the Rho limit testing for the modulation accuracy measurement in the TD SCDMA analysis SENSe TD_SCDMA MACCuracy LIMit RHO STATe lt boolean gt SENSe TD SCDMA MACCuracy LIMit RHO STATe lt boolean gt ON OFF 1 0 ON or 1 enables the Rho limit testing OFF or 0 disables the Rho limit testing DEMTD_SCDMA SENSe TD SCDMA MACCuracy LIMit RHO STATe ON enables the Rho limit testing for the modulation accuracy measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 85 GPIB Commands SENSe TD_SCDMA STABle Subgroup The SENSe TD_SCDMA STABle commands set up the conditions related to the Symbol Table in the TD_SCDMA analysis Command Tree SENSe TD_SCDMA STABle TPCSs COUNt ONE D16Sfactor SELect lt boolean gt SENSe TD_SCDMA STABle TPCSs COUN Sets or queries the TPC and SS symbol count in the TD SCDMA anal
77. TCh TD_SCDMA TOOMask Fetches the results of the transmit on off mask measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA TOOMask Arguments None Returns lt Pass Fail gt lt Tx_Direction gt lt Mid_Ramp_Max_Power gt lt chip_offset1 gt lt Tx_Off_Max_Power gt lt chip_offset2 gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Tx_Direction gt 1 0 0 Uplink or 1 Downlink lt Mid_Ramp_Max_Power gt lt NRf gt Tx ON uplink OFF downlink Mid ramp region Maximum power dBm lt chip_offset1 gt lt NR1 gt Chip offset at lt Mid_Ramp_Max_Power gt lt Tx_Off_Max_Power gt lt NRf gt Tx OFF region Maximum power dBm lt chip_offset2 gt lt NR1 gt Chip offset at lt Tx_Off_ Max_Power gt Measurement Modes DEMTD_SCDMA Example FETCh TD_SCDMA TOOMask might return 0 1 5 25502E 001 1047 1 20229E 001 1822 as the results of the transmit on off mask measurement under the TD SCDMA standard Related Commands INSTrument SELect FETCh TD_SCDMA TSSummary Fetches the results of the timeslot summary measurement under the TD SCDMA standard Syntax FETCh TD SCDMA TSSummary Arguments None Returns lt Pass_Fail gt lt Terror gt lt D1_Power gt lt D2_Power gt lt Mid_Power gt lt AverageBurst_Power gt lt Count_of_K_Value gt lt K1 gt lt K2 gt lt K3 gt lt K4 gt lt K5 gt lt K6 gt lt K7 gt K8 gt Where lt Pass_fail gt
78. TD_SCDMA DDEMod SVIew Y SCALe PDIVision lt numeric_value gt DISPlay TD_SCDMA DDEMod SVIew Y SCALe PDIVision NOTE This command is available when DISPlay TD_SCDMA DDEMod SVlew FORMat is set to TPVTime LPVTime or SPVTime lt numeric_value gt lt NRf gt specifies the vertical scale in the subview DEMTD_SCDMA DISPlay TD SCDMA DDEMod SVIew Y SCALe PDIVision 1dBm sets the vertical scale to 1 dBm div in the subview under the TD SCDMA standard WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands DISPlay TD_SCDMA DDEMod SVlew Y SCALe PUNit Selects or queries the unit on the Y or power axis in the subview during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDE Mod SVlew FORMat is set to CDPower CVSYmbol PCGRam or CVSFrame Syntax DISPlay TD_SCDMA DDEMod SVIew Y SCALe PUNi t RELative ABSolute DISPlay TD_SCDMA DDEMod SVIew Y SCALe PUNit Arguments RELative represents the relative channel power to the total power of all the channels along the Y axis in dB ABSolute represents the absolute power of each channel along the Y axis in dBm Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew Y SCALe PUNit ABSolute sets the Y axis unit in the subview to Absolute under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod SVIew FORMat DISPlay TD_SCDMA DDEMod SVlew Y S
79. TORe LIMit oea riri aa aa PENARE AA TIE A eens MMEMo ry STORe STABIO parnai ta Pra A ETA eee eens Appendix A Specifications esssssusessssesoesesoseseosee Appendix B Factory Default Settings NEEE EEE Appendix C Setting Range esssssussssosesossscosesoosee Index LOSE OESS EELEE Orr eae oe I O O O O 00 o 00 00 00 00 00 00 00 00 00 SO S NN WWWWWWWWW WW WW WWW WW WwW WwW NNF COU MAAANIAMNAAWWRFP OW WWWW WWW WwW WwW W j OODD ono ono om ole ANIANADAAHKHWW ST 1 Ke Ko 3 99 3 100 A 1 B 1 C 1 Index 1 WCA230A amp WCA280A TD SCDMA Analysis Software Table of Contents List of Figures Figure 2 1 Menu diagram showing measurement functions available in Option 28 ccc cece cree cece eee e eens 2 1 Figure 2 2 Measurements of same domain interact 2 3 Figure 2 3 Instrument capable of displaying multi domains 2 4 Figure 2 4 Subframe summary cece eee ee cee ceees 2 6 Figure 2 5 Modulation accuracy measurement 2 2 9 Figure 2 6 Comp constellation display ceeeeees 2 12 Figure 2 7 Symbol constellation display ceeeeeeee 2 14 Figure 2 8 Symbol EVM display cceeececeeceees 2 16 Figure 2 9 MagErr display cc cece eee cececeeeeeees 2 18 Figure 2 10 PhaseErr display 0 cece eee ceceececes 2 20 Figure 2 11 Code domain power measurement 64 2 2
80. User Manual Tektronix WCA230A amp WCA280A Option 28 TD SCDMA Analysis Software 071 1663 00 This document applies to firmware version 2 40 and above www tektronix com Copyright Tektronix Inc All rights reserved Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions Use duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph c 1 ii of the Rights in Technical Data and Computer Software clause at DFARS 252 227 7013 or subparagraphs c 1 and 2 of the Commercial Computer Software Restricted Rights clause at FAR 52 227 19 as applicable Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supercedes that in all previously published material Specifications and price change privileges reserved Tektronix Inc P O Box 500 Beaverton OR 97077 TEKTRONIX and TEK are registered trademarks of Tektronix Inc Software WARRANTY Tektronix warrants that the media on which this software product is furnished and the encoding of the programs on the media will be free from defects in materials and workmanship for a period of three 3 months from the date of shipment If a medium or encoding proves defective during the warranty period Tektronix will provide a replacement in exchange for the defective medium Except as to the me
81. W SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Sets the scale of the horizontal axis number of symbols 2 16 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Horizontal Start Sets the symbol number of the first left value of the horizontal axis m Vertical Scale Sets the scale of the vertical axis m Vertical Start Sets the minimum bottom value of the vertical axis Full Scale default scaling Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Start Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays if the Horizontal Start or Vertical Start menu is selected WCA230A amp WCA280A TD SCDMA Analysis Software 2 17 TD SCDMA Measurements MagErr Display When you select Mainview Content from the VIEW DEFINE menu and then select MagErr from the Mainview Content submenu changes of magnitude error over time for a single code channel are displayed for each symbol See Figure 2 9 The measured values for modulation accuracy are described the section Modulation Accuracy Measurement Readouts beginning on page 2 21 Tektronix WCA 280A PAUSE Frequency 1 Span Input Att Acquisition Length dB m Demod Frequency 1 500000 G
82. WCA280A TD SCDMA Analysis Software Preface About This Manual Related Manuals This manual provides operating instructions for the WCA230A amp WCA280A Portable Wireless Communication Analyzers Option 28 TD SCDMA Time Division Synchronous Code Division Multiple Access analysis software Option 28 supports TD SCDMA as described in the 3GPP Release 4 LCR Uplink Downlink 3GPP TS25 142 TS25 102 standard This manual is composed of the following chapters Getting Started provides a product description Operating Basics describes the measurement functions added by the option and explains how to set up the analyzer for each measurement mode Syntax and Commands lists all command subsystems and describes all programming commands Appendices provides additional information including specifications and factory default settings The following related documents are also available The WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual Tektronix part number 071 1253 xx contains a tutorial that describes how to operate the analyzer It also includes an in depth discussion on how to more completely use the analyzer features The WCA230A amp WCA280A Portable Wireless Communication Analyzers Programmer Manual Tektronix part number 071 1255 xx lists the programming commands for instrument operation and the W CDMA standard commands WCA230A amp WCA280A TD SCDMA Analysis Software vii Preface Cont
83. acting Tektronix Phone 1 800 833 9200 Address Tektronix Inc Department or name if known 14200 SW Karl Braun Drive P O Box 500 Beaverton OR 97077 USA Web site www tektronix com Sales support 1 800 833 9200 select option 1 Service support 1 800 833 9200 select option 2 Technical support www tektronix com support 1 800 833 9200 select option 3 6 00 a m 5 00 p m Pacific Standard Time This phone number is toll free in North America After office hours please leave a voice mail message Outside North America contact a Tektronix sales office or distributor see the Tektronix web site for a list of offices viii WCA230A amp WCA280A TD SCDMA Analysis Software C Getting Started Getting Started Product Description This chapter provides an overview of the capabilities added to the WCA230A amp WCA280A with Option 28 The TD SCDMA standard contains elements of frequency division time division and code division multiple access technologies Combining these technologies allows the reuse of frequency channels for uplink and downlink communication A single frequency channel is shared between uplink and downlink and among users The use of a single channel is accomplished by allocating timeslots to each transmit direction and to each user The WCA230A amp WCA280A Wireless Communication Analyzers Option 28 is an analysis software option that adds transmitter measurement capability for TD SCDMA uplink and
84. al in chips The range depends on the acquisition length A minimum of three subframes are required when phase reference is set to midamble Seven subframes are required when phase reference is set to pilot Sets the start point of the analysis with respect to the trigger position In free run the trigger position is at the left edge of the display When triggered the trigger position is set by the trigger position control Displays the time length for spectrum processing displayed in the subview This value is equivalent to one frame acquisition length Sets the beginning of the Spectrum Length with respect to the trigger position NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for detailed information about the timing parameters WCA230A amp WCA280A TD SCDMA Analysis Software 2 61 TD SCDMA Measurements Measurement Parameters for Demodulation Measurements The measurement parameters for the measurements requiring demodulation are global settings all demodulation measurements use the same parameters The parameters listed in Table 2 2 affect the following measurements Subframe Summary Modulation Accuracy Code Domain Power Timeslot Summary Transmit On Off Mask Symbol Table You can set the following measurement parameters using the MEAS SETUP menu when a demodulation measurement is selected Press the MEAS SETUP key to open the MEAS SETUP menu Table 2 2 Global demod
85. amble power K Average burst power 2 50 Description The measured difference between the measured start of a timeslot and the ideal start of the timeslot relative to the selected subframe time reference The RMS power in the data1 burst The RMS power in the data2 burst The RMS power in the midamble burst The value of K for this timeslot K is the maximum number of midamble codes that can be used in the midamble of the current timeslot See the 3GPP TDD LCR standard for detailed information The RMS power over the entire timeslot WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Transmit On Off Mask The Transmit On Off Mask measurement verifies that the Node B or UE turns off its transmitter when it is not supposed to be emitting power A power versus time graph of the selected subframe is overlaid on a limit mask The instanta neous power is compared against the mask and a PASS FAIL determination is made Figure 2 23 shows an example of the transmit on off mask The measured values are described in Transmit On Off Mask Measurement Readouts on page 2 54 Tektronix WCA 280A Mi PAUSE Frequency z Acquisition Length 40 ms Span Input Att c dBm Demod Frequency Timeslot TSO DL Transmit Direction Downlink Tx OFF Mid Ramp Region Max Power chip Tx OFF Region Max Power chip TD SCDMA Transmit On Off Mask Measurement results Downlink mask shown Uplink
86. analysis SENSe TD_SCDMA MODulation K ZERO Syntax Arguments Measurement Modes Example Sets or queries the the K value for timeslot 0 in the TD SCDMA analysis SENSe TD_SCDMA MODulation K ZERO lt numeric_value gt SENSe TD_SCDMA MODulation K ZERO lt numeric_value gt lt NR1 gt specifies the K value for timeslot 0 Range 2 to 16 DEMTD_SCDMA SENSe TD SCDMA MODulation K ZERO 2 sets the K value to 2 for timeslot 0 in the TD SCDMA analysis SENSe TD_SCDMA MODulation SCODe Syntax Arguments Measurement Modes Example 3 76 Sets or queries the the scrambling code value in the TD SCDMA analysis SENSe TD_SCDMA MODulation SCODe lt numeric_value gt SENSe TD_SCDMA MODul ation SCODe lt numeric_value gt lt NR1 gt specifies the scrambling code Range 0 to 127 DEMTD_SCDMA SENSe TD SCDMA MODulation SCODe 0 sets the scrambling code to 0 in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA MODulation SPOint Syntax Arguments Measurement Modes Example Sets or queries the switching point between the Uplink and Downlink timeslots in the TD SCDMA analysis NOTE This command also affects Channel Power ACLR Intermodulation and Occupied Bandwidth measurements SENSe TD _SCDMA MODulation SPOint lt numeric_value gt SENSe TD_SCDMA MODulation SPOint lt numeric_value gt lt NR
87. annel gt lt NRf gt is the lower channel measured value in dBm lt U_channel gt lt NRf gt is the upper channel measured value in dBm lt L3_lower gt lt NRf gt is the lower third order lower measured value in dBc lt L3_upper gt lt NRf gt is the lower third order upper measured value in dBc lt U3_lower gt lt NRf gt is the upper third order lower measured value in dBc lt U3_upper gt lt NRf gt is the upper third order upper measured value in dBc lt L5_lower gt lt NRf gt is the lower fifth order lower measured value in dBc lt LS_upper gt lt NRf gt is the lower fifth order upper measured value in dBc lt U5_lower gt lt NRf gt is the upper fifth order lower measured value in dBc lt US_upper gt lt NRf gt is the upper fifth order upper measured value in dBc When each value is not present the value of 1000 is returned Measurement Modes DEMTD_SCDMA Example READ TD _SCDMA IM might return 1 2 061E 001 5 501E 001 1 66E 001 1 78E 001 4 76E 001 1 32E 001 4 73E 001 1 29E 001 5 1E 001 1 66E 001 for the intermodulation measurement under the TD SCDMA standard Related Commands INSTrument SELect 3 56 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands READ TD_SCDMA OBWidth Syntax Arguments Returns Measurement Modes Example Related Commands Obtains the results of the occupied bandwidth measurement under the TD SCDMa
88. annels 2 26 Intermodulation measurement 2 58 K K value 2 50 K for timeslots 2 63 L Loading measurement limits 2 71 Phase error display 2 20 Magnitude error display 2 18 Manual 2 63 Measurement ACLR 2 39 Channel power 2 33 Code domain power 2 23 intermodulation 2 58 Modulation accuracy 2 9 Spectrum emission mask 2 43 Subframe summary 2 6 Symbol table display 2 55 Timeslot summary 2 47 Transmit on off mask 2 51 Measurement filter shape 2 63 Measurement limit defaults 2 72 Measurement limits editing 2 65 loading 2 71 saving 2 71 setting 2 67 Measurement parameters code domain power 2 62 modulation accuracy 2 62 subframe summary 2 62 symbol table 2 62 timeslot summary 2 62 transmit on off mask 2 62 Timing parameters code domain power 2 61 modulation accuracy 2 61 subframe summary 2 61 Index 2 symbol table 2 61 timeslot summary 2 61 transmit on off mask 2 61 Midamble 2 62 Midamble power 2 50 MMEMory commands long 3 99 MMEMory commands short 3 10 Modulation accuracy measurement 2 9 phase error display 2 20 composite constellation display 2 12 magnitude error display 2 18 symbol constellation display 2 14 symbol EVM display 2 16 Modulation parameters 2 63 Multiframe position 2 8 0 Overview functional 2 1 P Parameter control 2 63 auto 2 63 manual 2 63 Phone number Tektronix viii Product support contact information viii Programming 3 1
89. are valid This setting is used when the Time Reference is set to Uplink TS Pattern WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements NOTE UpPts can also be active but does not need to be explicitly listed Downlink signals can not be active when using the pattern method to determine subframe timing Active Timeslot Threshold dB Sets the threshold that determines if a timeslot is active or inactive A timeslot that is transmitting above this level is considered active Limits Displays the limits editor to set the pass fail limits for measure ments The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot Refer to Editing the Measurement Limits on page 2 65 for more information NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the scale settings for the display Setting the Span You can set the following measurement parameters using the SPAN menu Press Parameters the SPAN key to open the menu m Span Hz Sets frequency range to be analyzed This affects the number of channels that are analyzed m Start Freq Hz Sets the minimum value of the frequency axis The stop frequency automatically adjusts according to the span setting Stop Freq Hz Sets the maximum value of the frequency axis The start frequency autom
90. ased either on the downlink pilot DwPTS or the midamble of the timeslot selected with the Freq amp Phase Reference setting in the measurement setup menu The imbalance between the level of the channel to the level of the Q channel A value of 0 0 dB means that there is no imbalance the and Q channels have the same level This measures how far the origin of the constellation of the composite signal is from the true origin 0 0 The Q offset is included in the EVM calculations unless it is turned off in the measurement setup menu WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Code Domain Power Measurement The code domain power measurement measures the distribution of signal power across the set of code channels The display can be in absolute power or normalized to the total timeslot power defined by the Y Axis setting in the View Scale menu A bar graph is displayed that represents the power of each channel This measurement allows you to verify that each code channel is operating at its proper level Figure 2 11 shows an example of the code domain power measurement Tektronix WCA 280A 0 z PAUSE Frequency 7 Acquisition Length 3 Span Input Att 0 0 dBm ja i i i dBm 10 dB 100 Selected code Power level OVSF code Spreading factor Modulation type Vertical scale Vertical start TD SCDMA Code Domain Power lt Horizontal scale gt
91. asurement under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA MACCuracy Syntax Sets up the analyzer to the default settings for the modulation accuracy measure ment under the TD SCDMA standard CONFigure TD SCDMA MACCuracy WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Arguments Measurement Modes Example Related Commands None DEMTD_SCDMA CONFigure TD SCDMA MACCuracy Sets up the analyzer to the default settings for the modulation accuracy measure ment under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA OBWidth Syntax Arguments Measurement Modes Example Related Commands Sets up the analyzer to the default settings for the occupied bandwidth measure ment under the TD SCDMA standard CONFigure TD SCDMA OBWidth None DEMTD_SCDMA CONFigure TD SCDMA OBWidth Sets up the analyzer to the default settings for the occupied bandwidth measure ment under the TD SCDMA standard INSTrument SELect CONFigure TD_SCDMA SEMask Syntax Arguments Measurement Modes Example Related Commands WCA230A amp WCA280A TD SCDMA Analysis Software Sets up the analyzer to the default settings for the spectrum emission mask measurement under the TD SCDMA standard CONFigure TD SCDMA SEMask None DEMTD_SCDMA CONFigure TD SCDMA SEMask Sets up the analyzer to the default settings for the spectrum emission mask measurement under the TD SCDM
92. asurement limits to a file When you open the a spectrum emission mask measurement limits editor press the Cancel Back MENU side key to return the measurement limit editor Press the Save Limits side key to open the Save to File menu You can save the limits by using the preset file name or by entering a new file name To use the preset file name press one of the following side keys Save to LimitsA Save to LimitsB or Save to LimitsC To enter a new file name type a file name in the text box at the top of the menu and then press the Save File Now side key The file extension lmt is automatically added to the limits file Perform the following steps to load measurement limits from a file When you open the spectrum emission mask measurement limits editor or gated output power measurement limits editor press the Cancel Back MENU side key to return the measurement limit editor Press the Load Limits side key to open the Load From File menu To load limits from the preset file press one of the following side keys Load from LimitsA Load from LimitsB or Load from LimitsC To load limits from an existing file select the file from the file list and then press the Load File Now side key WCA230A amp WCA280A TD SCDMA Analysis Software 2 71 Editing the Measurement Limits Measurement Limit Defaults Tables 2 5 through 2 9 list the default limit settings used to perform the pass file testing for the TD SCDMA measure
93. atically adjusts according to the span setting NOTE Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual for information about the span settings for the display Changing the View You can change the contents in the view using the VIEW DEFINE menu Press Contents the VIEW DEFINE key to open the menu m Grid Style Sets the grid style in the view You can select Off Fix or Flex For Flex the grid is changed depending on frequency or span setting Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key WCA230A amp WCA280A TD SCDMA Analysis Software 2 41 TD SCDMA Measurements 2 42 You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Hz Sets the scale of the horizontal axis Horizontal Start Hz Sets the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays when the Horizontal Start or V
94. ay the entire waveform Horizontal Scale s Sets the scale of the horizontal axis number of chips or symbols Horizontal Start s Sets the chip number or symbol number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size amount per click of the general purpose knob for changes to the Horizontal Start or Vertical Stop settings The step size menus only display when selecting the Horizontal Start or Vertical Stop menus Zoom to Timeslot Start Zooms the display into the region tested for the timing error Eight chips are shown before the timeslot and 60 chips after A blue line is drawn to indicate the ideal timeslot start chip The default scale for the timeslots is based on the width number of chips of the timeslot WCA230A amp WCA280A TD SCDMA Analysis Software 2 49 TD SCDMA Measurements Marker d B m 10 d B Blue vertical line indicates Ideal timeslot start chip Start 119 916406 ms Figure 2 22 Timeslot summary display zoomed Timeslot Summary This section describes the measurement readouts displayed in the mainview of Measurement Readouts the timeslot summary measurement Readout Timing Error Datai power Data2 power Mid
95. bview during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod SVIew FORMat is set to LPVTime DISPlay TD_SCDMA DDEMod SVIew ZOOM MCONtrol END None DEMTD_SCDMA DISPlay TD_SCDMA DDEMod SVIew ZOOM MCONtrol END Sets the zoom to the transmit mask end WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands DISPlay TD_SCDMA DDEMod SVlew ZOOM TSLot START Sets the zoom to the timeslot start in the subview during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod SVlew FORMat is set to TPVTime Syntax DISPlay TD_SCDMA DDEMod SVIew ZOOM TSLot START Arguments None Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew ZOOM TSLot START Sets the zoom to the timeslot start WCA230A amp WCA280A TD SCDMA Analysis Software 3 33 GPIB Commands DISPlay TD_SCDMA SPECtrum Subgroup Command Tree The DISPlay TD_SCDMA SPECtrum commands control the spectrum display in the channel power intermodulation spectrum emission mask SEM and occupied bandwidth measurements under the TD SCDMA standard DISPlay TD_SCDMA SPECtrum X SCALe OFFSet lt numeric_value gt PDIVison lt numeric_value gt Y SCALe FIT FULL OFFSet lt numeric_value gt PDIVison lt numeric_value gt DISPlay TD_SCDMA SPECtrum X SCALe OFFSet Syntax A
96. cal axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value WCA230A amp WCA280A TD SCDMA Analysis Software 2 45 TD SCDMA Measurements m Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays when the Horizontal Start or Vertical Stop menu is selected 2 46 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Timeslot Summary The timeslot summary measurement displays a power versus time graph of the selected timeslot within the selected subframe and displays several timeslot re lated statistics The timeslot summary includes eight chips before timeslot and eight chips after timeslot for visual reference Figure 2 21 shows an example of the timeslot summary The measured values are described in Timeslot Summary Measurement Readouts on page 2 50 Tektronix WCA 280A 8 0 IM PAUSE quisition Length 40 ms Span Input Att dBm dBm 10 dB 10 d By Demod Frequency 1 5000 Marker Timeslot TSO DL Subframe 0 E Li Timing Error nS dBm Datal power Data2 power Midamble power K Average Burst Power 19 06 d m TD SCDMA Timeslot Summary Measurement results Blue vertical line indicates Ideal timeslot start chip Figure 2 21 Timeslot summary Displa
97. channel leakage power ratio default settings Sets up the analyzer to the code domain power measurement default settings Sets up the analyzer to the channel power measurement default settings Sets up the analyzer to the intermodulation measure ment default settings Sets up the analyzer to the modulation accuracy measurement default settings Sets up the analyzer to the occupied bandwidth measurement default settings Sets up the analyzer to the spectrum emission mask measurement default settings Sets up the analyzer to the subframe summary measurement default settings Sets up the analyzer to the symbol table default settings Sets up the analyzer to the default settings for the transmit on off mask measurement under the TD SCDMA standard Sets up the analyzer to the timeslot summary measurement default settings Use these commands to control how to show measurement data on the screen Table 3 2 DISPlay commands Header DISPlay TD_SCDMA DDEMod MVlew subgroup DISPlay TD_SCDMA DDEMod MVlew FORMat DISPlay TD_SCDMA DDEMod MVlew RADix 3 2 Description Sets or queries the main view display format Sets or queries the base of symbols on the main view during the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Table 3 2 DISPlay commands cont Header DISPlay TD_SCDMA DDEMod MVlew X SCALe OFFSet DISPlay TD_SCDMA DDEMod MVlew X SCALe PDIVi
98. channels When you select Absolute the Y axis represents the absolute power of each channel This section describes the measurement readouts displayed in the mainview of the code domain power measurements The numerical measurement results reported are identical for each of the code domain power measurement displays Readout Peak CDE Peak Active CDE Code Domain Error Number of Active Channels Description The peak code domain error is a measure of the power in the residual error of each code The residual error is calculated by subtracting a reference signal from the input signal The peak code domain error is the maximum code domain error of all the codes including both active and inactive channels The Peak CDE readout shows the Peak CDE measurement and which code contained the peak error The peak active code domain error is similar to the Peak CDE measurement but is the maximum of the code domain error of just the active channels excluding the inactive channels from the calculation The code domain error shows the error of the currently selected code The readout shows the code domain error and the selected code The code is selected with the Select Code setting in the measurement menu This is the number of active channels that have been detected in the current timeslot WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Channel Power Measurement Tektronix WCA 2
99. cription of the measurement parameters NOTE The measurement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle You can change the view contents in the overview subview using the VIEW DEFINE menu Press the DEFINE key to display the VIEW DEFINE menu m Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the SELECT key to change the selected view m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display Mainview Content The mainview content display can not be changed from timeslot summary WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key Scale and Format in the You can set the scale for the display using the VIEW SCALE menu Press the Mainview VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display
100. curacy measurement results Returns the occupied bandwidth measurement results Returns the spectrum emission mask measurement results Returns the subframe summary measurement results Returns the symbol table measurement results Returns the results of the transmit on off mask measurement under the TD SCDMA standard Returns the timeslot summary measurement results Returns the spectrum waveform data of the adjacent channel leakage power ratio ACLR measurement Returns the spectrum waveform data of the channel power measurement Returns the spectrum waveform data of the intermodula tion measurement Returns the spectrum waveform data of the occupied bandwidth measurement Returns the spectrum waveform data of the spectrum emission mask SEM measurement Returns the time domain amplitude data of subframe summary measurement results Returns the results of the time domain amplitude data of the transmit on off mask measurement under the TD SCDMA standard Returns the time domain amplitude data of timeslot summary measurement results 3 5 GPIB Commands READ Commands Use the READ commands to acquire an input signal once in the single mode and obtain the measurement results from that data If you want to fetch the measurement results from the data currently residing in the memory without acquiring the input signal use the FETCh command Table 3 4 READ commands Header READ TD_SCDMA ACLR
101. d phase reference for demodulation of the remainder of each timeslot This setting is useful if the signal under test does not contain a downlink pilot Selects the downlink pilot as the frequency and phase reference for the timeslot Because there is only one DwPTS per subframe when the DwPTS is used as a reference a single phase and frequency estimate is used for every timeslot in the subframe This reference method should only be used if the DwPTS is active and the timeslots to be analyzed are modulated at the same source as the DwPTS WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Table 2 2 Global demodulation measurement parameter settings cont Parameter Timeslot s to be Analyzed All Active TS Current TS Only Active Timeslot Threshold dB EVM includes I Q Offset Modulation Parameters Parameter Control Auto Manual Sync DL Sync UL Scrambling Code K for Timeslots 1 through 6 K for Timeslot 0 Switching Point timeslot Measurement Filter Shape Select Subframe Description Determines which timeslots to analyze Measurement results are calculated for all active timeslots Inactive timeslots are ignored Active timeslots are determined by the Active Timeslot Threshold Level setting Only the currently selected timeslot is analyzed in each subframe All other timeslots are ignored even if active This setting may decrease measurement calculation times With this s
102. data as the spectrum waveform data of the spectrum emissions mask measurement under the TD SCDMA standard INSTrument SELect READ TD_SCDMA SPECtrum OBWidth Syntax Arguments Returns Measurement Modes Example Related Commands 3 60 Obtains the spectrum waveform data of the occupied bandwidth measurement under the TD SCDMA standard READ TD SCDMA SPECtrum OBWidth None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 DEMTD_SCDMA READ TD SCDMA SPECtrum OBWidth might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the occupied bandwidth measurement under the TD SCDMA standard INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe Commands The SENSe commands set the details for each of the measurement sessions SENSe TD_SCDMA Subgroup The SENSe TD_SCDMA commands set up the conditions related to the TD SCDMA analysis Command Tree SENSe TD_SCDMA BLOCk FILTer MEASurement OFF RCOSine RRCosine IMMediate MEASurement CHPower ACLR IM SEMask CDPower
103. dia on which this software product is furnished this software product is provided as is without warranty of any kind either express or implied Tektronix does not warrant that the functions contained in this software product will meet Customer s requirements or that the operation of the programs will be uninterrupted or error free In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period If Tektronix is unable to provide a replacement that is free from defects in materials and workmanship within a reasonable time thereafter Customer may terminate the license for this software product and return this software product and any associated materials for credit or refund THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES EXPRESS OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPLACE DEFECTIVE MEDIA OR REFUND CUSTOMER S PAYMENT IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES Se Table of Contents About This Manual saninin aai eee ccc eee en eens vii Related Manuals 0 cee cece cec
104. display one of the code domain related measurements You can select Code Domain Power Code Domain Power by Subframe Code Domain Power by Symbol or Power Codogram The mainview also displays the numerical measurement results of the selected display A Pass or Fail message determined by the Limits settings for each measurement is displayed If all measurements pass PASS is displayed at the top of the screen If any measurement fails FAIL is displayed at the top of the screen Refer to Scale and Format in the Mainview beginning on page 2 25 for more information about the mainview content selections Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key Scale and Format in the This subsection describes the scale settings and display format in the mainview Mainview Code Domain Power Display When you select Mainview Content from the VIEW DEFINE menu and then select Code Domain Power from the Mainview Content submenu the code domain power for code channels is displayed see Figure 2 12 The code domain power display shows the power in all code channels in the two data bursts of the selected timeslot and subframe The measured values for code domain power are described the section Code Domain Power Measurement Readouts beginning on page 2 32 WCA230A amp WCA280A TD SCDMA Analysis Software 2 25 TD SCDMA Measurements Marker readout Demod Frequency 1 500000 Marke Timeslot
105. divided into the following subsections Subframe summary Modulation accuracy Code domain power Channel power OBW occupied bandwidth ACLR adjacent channel leakage ratio Spectrum emission mask SEM Timeslot summary Transmit on off mask Symbol table Intermodulation NOTE If you are not familiar with the operation of the WCA230A WCA280A refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual before reading this section WCA230A amp WCA280A TD SCDMA Analysis Software 2 5 TD SCDMA Measurements Subframe Summary Tektronix WCA 280A Frequency 1 Span 5 Input Att The subframe summary measurement displays a power versus time graph of the selected subframe along with all general parameters discovered while analyzing the subframe The subframe summary waveform is available whenever subframe timing can be determined using either DwPts or an external subframe trigger as a time reference Figure 2 4 shows an example of the subframe summary The measured values for subframe are described the section Subframe Measure ment Readouts beginning on page 2 8 MEASURE Acquisition Length Cancel Back SS Modulation Accuracy Code Domain Power Channel Power Marker readout corresponds to the marker position Green bar Timeslot TSO DL Subframe O represents the nalysis are anay a Uplink Pilot Sync UL Current Scrambling Code timeslot and Switchi
106. downlink 3GPP TDD LCR to the analyzers You can perform the following TD SCDMA measurements m Demodulation measurements m Subframe summary m Modulation accuracy m Code domain power Timeslot summary m Transmit on off mask m Symbol table m RF measurements m Channel power OBW occupied bandwidth m ACLR adjacent channel leakage ratio m Spectrum emission mask m Intermodulation In addition the option provides user defined measurement limits for many measurement results Using these measurement limits you can easily check that the input signal meets the specification WCA230A amp WCA280A TD SCDMA Analysis Software 1 1 Getting Started 1 2 WCA230A amp WCA280A TD SCDMA Analysis Software y Operating Basics _ eee Functional Overview This chapter provides an overview of the Option 28 measurement functions Figure 2 1 shows the measurement functions and how to access each measure ment function from the front panel menu key fr Other option name if installed Measurement functions added by Option 28 Analog Demod eta Digital Demod Subframe Summary Modulation Accuracy Code Domain Power Channel Power L Standard _ Standard _ _ Tp scpma MEASURE _ OBW menu menu ACLR Spectrum Emission Mask Timeslot Summary Transmit On Off Mask Symbol Table Intermodulation Figure 2 1 Menu diagram showing measurement functions available in Option 28 WCA230A amp WCA280A
107. ds lt numeric_value gt SENSe TD_ SCDMA ACQuisition SFRames Sets or queries the acquisition length in subframes in the TD SCDMA analysis Syntax SENSe TD_SCDMA ACQuisition SFRames lt numeric_value gt SENSe TD_SCDMA ACQuisition SFRames Arguments lt numeric_value gt lt NR1 gt specifies the acquisition length in subframes Range 4000 to no logical limitation depends on Span and memory length Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA ACQuisition SFRames 10240 sets the acquisition length in subframes to 10240 in the TD SCDMA analysis SENSe TD_SCDMA ACQuisition SEConds Queries the acquisition length in seconds in the TD SCDMA analysis Syntax SENSe TD_SCDMA ACQuisition SEConds Arguments None Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA ACQuisition SEConds returns the acquisition length in seconds in the TD SCDMA analysis 3 64 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_ SCDMA ACQuisition HISTory Syntax Arguments Measurement Modes Example Sets or queries the acquisition history The acquisition can be viewed as it is selected and can be reanalyzed after the selection SENSe TD_SCDMA ACQuisition HISTory lt numeric_value gt SENSe TD_SCDMA ACQuisition HISTory lt numeric_value gt lt NRI1 gt specifies the acquisition history Range No logical limitation to 0 depends on Span and memory length DEMTD_SCDMA
108. dth 00000002 eee 3 60 SENSe Commands 654s ew SRA SHES RSE FAS ee RNS 3 61 SENSe TD_SCDMA BLOCK 1 0 0 0 cece cece eee eens 3 61 SENSe TD_SCDMA FILTer MEASurement 00 000 e cues 3 62 SENSe TD_SCDMAJ IMMediate 0 0000 e eee ee eee ee 3 62 SENSe TD_SCDMA MEASurement 0 0 0 0 cece cee eee eee 3 62 SENSe TD_SCDMA ACQuisition SFRames 000200 e eee 3 64 SENSe TD_SCDMA ACQuisition SEConds 00000000005 3 64 SENSe TD_SCDMA ACQuisition HISTory 00 cee eee eee 3 65 SENSe TD_SCDMA ANALysis CHANnel THReshold 3 66 SENSe TD_SCDMA ANALysis INTerval 2 2 0 00 00 c eee eee eee 3 67 SENSe TD_SCDMA ANALysis OFFSet CHIPs 0 0085 3 67 SENSe TD_SCDMA ANALysis OFFSet DFRequency 3 67 SENSe TD_SCDMA ANALysis OFFSet IQ 2 0 0 cece eee eee ee 3 68 SENSe TD_SCDMA ANALysis REFerence SFRame 3 68 SENSe TD_SCDMA ANALysis REFerence TFPHase 3 69 SENSe TD_SCDMA ANALysis REFerence TIME 04 3 69 SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern 3 70 SENSe TD_SCDMA ANALysis TSLot 2 0 0 0 cece eee eee 3 70 SENSe TD_SCDMA ANALysis TSLot THReshold 045 3 70 SENSe TD_SCDMA SPECtrum OFFSet 2 2 0 00600 c cee eee eee 3 72 SENSe TD_SCDMA SPECtrum TINTerval 2 0 0 0 00 000000 3 72 SENSe
109. e switching point or select code In the case of the transmit on off masks measurement the masks are update when exiting the limits editor but the mask region doesn t change until the next run or analysis cycle WCA230A amp WCA280A TD SCDMA Analysis Software 2 65 Editing the Measurement Limits Tektronix WCA 280A D 2 Mi LIMITS Cancel Back Frequency Span 4 Input Att FEE row Downlink limit sBownlink Limit Enable Limit No es Lower Limit dBm 150 editor menu Channel Power displayed ACLR ist Lower Channel ACLR 1st Upper Channel ACLR 2nd Lower Channel ACLR 2nd Upper Channel Intermod 3rd Order Intermod Sth Order SEM Offset From Channel SEM Inband Spurious Composite RMS EVM Composite Peak EVM Peak Code Domain Error Upper Limit dBm 30 Default all limits Rho OBW Tx OFF Level Save Limits Tx OFF Mid Ramp Level Load Limits TD SCDMA Measurement Off Select row to edit Figure 2 27 Measurement limits editor Table 2 3 describes all of the measurement limit items available in the measure ment limits editor Table 2 3 Measurement limits items Limit item Lower limit range Upper limit range Channel power Sets the lower and upper limits for the 200 to 200 dBm 200 to 200 dBm Channel Power measurement ACLR 1st Lower Channel Sets the upper limit for the first lower Not settable 70 to 70 adjacent chann
110. e analyzer to at least a 10 MHz span to allow the ACLR to be measured on the two adjacent and two alternate channels A span of 5 MHz reduces the ACLR measurement to just the immediate adjacent channels If the span setting is not wide enough for at least three channels ACLR cannot be measured Figure 2 18 shows an example of the ACLR measurement MEASURE Cancel Back Subframe Summary Modulation Accuracy Code Domain Power Channel Power OBW Timesl Main Chan BW 1 Adj Chan BW 1 Chan Spacing Upper1l ACLR 42 05 dB Upper2 ACLR 51 48 dB 20 05 dBm Measurement Off 41 55 dB 51 51 dB Go to page 2 of 2 2 39 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 40 Parameters The ACLR measurement only operates in freerun mode and therefore does not display timing settings when pressing the TIMING menu Timeslot alignment from the start of a subframe for the channel power measurement is determined by analyzing a sufficiently long IQ capture Once you ve selected the ACLR measurement you can set the measurement parameters for ACLR using the MEAS SETUP menu Most of the ACLR measurement parameters are not shared with other measurements Press the MEAS SETUP key to open the menu Switching Point timeslot Sets the point where the timeslots switch from uplink to downlink timeslots You can set the value from 1 to 6 The timeslot switching point se
111. e burst power 2 50 C Channel power measurement 2 33 Code domain power by codogram display 2 31 Code domain power by subframe display 2 28 Code domain power by symbol display 2 29 Code domain power display 2 25 Code domain power measurement 2 23 code domain power by codogram display 2 31 code domain power by subframe display 2 28 code domain power by symbol display 2 29 code domain power display 2 25 Commands CONFigure long 3 11 CONFigure short 3 2 DISPlay long 3 16 short 3 2 FETCh long 3 37 short 3 5 GPIB 3 1 MMEMory long 3 99 short 3 10 WCA230A amp WCA280A TD SCDMA Analysis Software READ long 3 54 short 3 6 SENSe long 3 61 short 3 7 Composite constellation display 2 12 CONFigure commands long 3 11 short 3 2 Contacting Tektronix viii Current TS only 2 63 D Data1 power 2 50 Data2 power 2 50 Demod frequency offset 2 62 DISPlay commands long 3 16 DISPlay commands short 3 2 Downlink mask transmit on off measurement 2 51 Downlink pilot 2 8 DwPts 2 62 DwPts pattern 2 8 DwPts RMS power 2 8 E Editing measurement limits 2 65 EVM includes I Q offset 2 63 F Factory default settings B 3 FETCh commands long 3 37 FETCh commands short 3 5 Frequency amp phase reference 2 62 DwPts 2 62 midamble 2 62 Functional overview 2 1 G GP RMS power 2 8 GPIB commands 3 1 Index 1 Index Guard period 2 8 Ideal timeslot 2 50 Inactive ch
112. e gt SCODe lt numeric_value gt SPOint lt numeric_value gt SYNC UPLink lt numeric_value gt DOWN1 ink lt numeric_value gt SENSe TD_SCDMA MODulation CONTrol Syntax Arguments Measurement Modes Example Sets or queries the method used to set other modulation parameters in the TD SCDMA analysis SENSe TD_SCDMA MODulation CONTrol AUTO MANua1 SENSe TD_SCDMA MODulation CONTrol The arguments and descriptions are listed below Argument Description AUTO SyncDL SyncUL Scrambling Code and K TSO K TS1 TS6 are set by the analysis MANual All settings can be individually set without regard to other settings NOTE When switching from MANual to COUPled all settings retain their current values DEMTD_SCDMA SENSe TD_SCDMA MODulation CONTrol MANual sets the modulation parameter controls to manual mode WCA230A amp WCA280A TD SCDMA Analysis Software 3 75 GPIB Commands SENSe TD_SCDMA MODulation K NZERo Syntax Arguments Measurement Modes Example Sets or queries the the K value for all timeslots other than 0 in the TD SCDMA analysis SENSe TD_SCDMA MODulation K NZERo lt numeric_value gt SENSe TD_SCDMA MODulation K NZERo lt numeric_value gt lt NR1 gt specifies the K value for timeslots other than 0 Range 2 to 16 DEMTD_SCDMA SENSe TD SCDMA MODulation K NZERO 2 sets the K value to 2 for all timeslots except timeslot 0 in the TD SCDMA
113. e key resets the limit settings to their default values of the currently displayed limits editor table Other limit editor tables are not affected When you want to set limits for the spectrum emission mask perform the following steps to open the SEM measurement limits editor 1 Press the Select row to edit side key 2 Turn the general purpose knob or press the up down arrow keys to select SEM Offset From Channel or SEM Inband Spurious 3 Press the Edit SEM Offset Limits or Edit SEM Inband Limits side key This opens the limits editor to set more complex limits Refer to Setting the Spectrum Emission Mask Limits on page 2 69 for more information about the SEM limit tables 2 68 WCA230A amp WCA280A TD SCDMA Analysis Software Editing the Measurement Limits Setting the Spectrum Emission Mask Limits When you select the SEM Offset From Channel or SEM Inband Spurious row in the measurement limits editor another measurement limits editor for the spectrum emission mask measurement is displayed Figure 2 28 shows the measurement limits editor for the Spectrum Emission Offset From Channel measurement Tektronix Qe LIMITS Frequency Cancel Back Span mal Input Att f Select column to edit Enable Yes No Beginning Frequency Hz 815k Ending Frequency Hz 1 015M Enable Yes Yes Yes Nlo Measurement Bandwidth Hz 30k Offset from Carrier Lower Bot
114. e locus between symbols is not shown The cross marks indicate symbol positions of an ideal signal NOTE I and Q signals are normalized to prevent the scale from changing when signal attenuation changes WCA230A amp WCA280A TD SCDMA Analysis Software 2 15 TD SCDMA Measurements Symbol EVM Display When you select Mainview Content from the VIEW DEFINE menu and then select Symbol EVM from the Mainview Content submenu changes of Symbol EVM Error Vector Magnitude over time are displayed for each symbol calculated on a single code channel See Figure 2 8 The measured values for modulation accuracy are described the section Modulation Accuracy Measurement Readouts beginning on page 2 21 Tektronix WCA 280A 4 11 21 42 AM PAUSE Frequency gt GHz Acquisition Length 3 Span Input Att Demod Frequency 1 500000 GHz Timeslot TS5S DL Subframe O l r Midamble EYM rms peak Comp EVM rms 100 eak ip o 7 4 IE GHe wn Symbol number Comp Mag Error rms Varker bin peak 17 m SPSK elected code Comp Phase Error rms g oe peak prea ing factor Frequency Error 99 z Modulation type I Q Imbal 0 I Q Offset Vertical scale Y Vertical start TD SCDMA Modulatipn Accuracy Horizontal scale Expanded measurement results displayed when mainview is selected Horizontal start Figure 2 8 Symbol EVM display You can set the scale of the display using the VIEW SCALE menu Press the VIE
115. e n ene nes vii Contacting Tektronix 2 0 cece cece eee teen een eens Vili Getting Started Product DescnptOn 2 60828 Tce tS Sele WES NE i oe a A 1 1 Operating Basics Functional Overview 0c cece ccc reece cence cee eeeeees 2 1 Accessing a Measurement Function 0 0 0 0 cece cece eee eee 2 2 Versatile Display Capability 0 eee eee eee eee ee 2 2 TD SCDMA Measurements c ccc ce cee ce ccc escevees 2 5 S bframe Summary sae ate ene Sepa tany a EAE A pearance A A ean 2 6 Modulation Accuracy Measurement 0 eee eee eee eee 2 9 Code Domain Power Measurement 0 ce eee eee eee eee eee 2 23 Channel Power Measurement iens ii sen 0 0 cece eee eee eee eens 2 33 OBW Measurements isnt obs sheets ave le aye uals a AEE lace dave vel ane 2 36 ACL RMEGaSureme nt orata cigs KAE ins saya av elt gave E E EEE 2 39 Spectrum Emission Mask Measurement 00 02 eee ee eee eee 2 43 Fimeslot Summary mrs aeea Meh cc Mat Haat de aura that cad uyas E E sae 2 47 Transmit Om Of Mask scoala oe ah NE nated AE aA E N A wad 2 51 Symbol Table Display onanan EA E sata aera too ata A E REE ane aut 2 55 Intermodulation Measurement 0 00 cece eee eee eee eens 2 58 Timing Parameters for Demodulation Measurements 0 2 61 Measurement Parameters for Demodulation Measurements 2 62 Editing the Measurement Limits 0 0 e cece renee 2 65 Using the Measureme
116. e reference in the TD SCDMA analysis Sets or queries the timeslot s to be analyzed in the TD SCDMA analysis Sets or queries the level relative to the pilot which must be exceeded to identify a timeslot as active Sets or queries the spectrum offset within the time window Sets or queries the length of the time domain information used to construct the spectrum trace Sets or queries the selected code 3 7 GPIB Commands Table 3 5 SENSe commands cont Header SENSe TD_SCDMA SELect SFRame SENSe TD_SCDMA SELect TSLot SENSe TD_SCDMA MODulation subgroup SENSe TD_SCDMA MODulation CONTrol SENSe TD_SCDMA MODulation K NZERo SENSe TD_SCDMA MODulation K ZERO SENSe TD_SCDMA MODulation SCODe SENSe TD_SCDMA MODulation SPOint SENSe TD_SCDMA MODulation SYNC DOWNlink SENSe TD_SCDMA MODulation SYNC UPLink SENSe TD_SCDMA CHPower subgroup SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration SENSe TD_SCDMA CHPower DIRection SENSe TD_SCDMA CHPower LIMit STATe SENSe TD_SCDMA ACLR subgroup SENSe TD_SCDMA ACLR DIRection SENSe TD_SCDMA ACLR LIMit ADJacent 1 2 3 4 STATe 2 Description Sets or queries the selected subframe Sets or queries the selected timeslot Sets or queries the method used to set other modulation parameters Sets or queries the K for all timeslots except 0 Sets or queries the K for timeslot 0 Sets
117. e waveform Horizontal Scale Sets the scale of the horizontal axis number of symbols 2 20 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Horizontal Start Sets the symbol number of the first left value of the horizontal axis m Vertical Scale Sets the scale of the vertical axis Vertical Offset Sets the offset value of the vertical axis You can set the value from 450 to 450 degrees Full Scale Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Offset Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Offset settings A step size menu only displays if the Horizontal Start or Vertical Offset menu is selected Modulation Accuracy Measurement Readouts This section describes the measurement readouts displayed in the mainview of the modulation accuracy measurements The numerical measurement results reported are identical for each of the modulation accuracy measurement displays Readout Midamble EVM rms Midamble EVM peak Comp EVM rms Comp EVM peak Rho Comp Mag Error rms Comp Mag Error peak WCA230A amp WCA280A TD SCDMA Analysis Software Description The RMS error vector magnitude calculated over the midamble of the signal The result is optimized for the midamble and expressed as a percentage EVM measures the noise in the input signal relative t
118. ecifies the second channel frequency for the intermodulation Range Span 20 to full span Hz DEMTD_SCDMA SENSe TD SCDMA IM SCOFfset 1 5MHz sets the second channel frequency to 1 5 MHz for the intermodulation measure ment in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA SEMask Subgroup The SENSe TD_SCDMA SEMask commands set up the conditions related to the spectrum emission mask measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA SEMask BANDwidth BWIDth INTegration lt numeric_value gt DIRection UPLink DOWN ink LIMit TSPurious ZONE 1 2 3 4 5 STATe lt boolean gt OFCHannel ZONE 1 2 3 4 5 STATe lt boolean gt MEASurement OFCHannel ISPurious RCHannel MODE AUTO MANual LEVel lt numeric_value gt SENSe TD_SCDMA SEMask BANDwidth BWIDth INTegration Sets or queries the channel bandwidth for the spectrum emission mask measure ment in the TD SCDMA analysis NOTE This command is only available when SENSe TD_SCDMA SEMask RCHannel MODE command is selects MANual Syntax SENSe TD_SCDMA SEMask BANDwidth BWIDth INTegration lt numeric_value gt SENSe TD_SCDMA SEMask BANDwidth BWIDth INTegration Arguments lt numeric_value gt lt NRf gt specifies the channel bandwidth Range Bin bandwidth x 8 to full span Hz WCA230A amp WCA280A TD SCDMA Analysis Software 3 91
119. el in the ACLR measurement ACLR 1st Upper Channel Sets the upper limit for the first upper Not settable 70 to 70 adjacent channel in the ACLR measurement ACLR 2nd Lower Channel Sets the upper limit for the second lower Not settable 70 to 70 adjacent channel in the ACLR measurement ACLR 2nd Upper Channel Sets the upper limit for the second upper Not settable 70 to 70 adjacent channel in the ACLR measurement Intermod 3rd Order Sets the upper limit of the third harmonic Not settable 200 to 200 dBc distortion component for the Intermodulation measurement 2 66 WCA230A amp WCA280A TD SCDMA Analysis Software Editing the Measurement Limits Table 2 3 Measurement limits items cont Limit item Intermod 5th Order SEM Offset From Channel SEM Inband Spurious Composite RMS EVM Composite Peak EVM Peak Code Domain Error Rho OBW Tx OFF Level Tx OFF Mid Ramp Level Setting a Measurement Limit Lower limit range Upper limit range Sets the upper limit of the fifth harmonic Not settable 200 to 200 dBc distortion component for the Intermodulation measurement Select this item to access another measure ment limits editor to edit SEM offset from channel limits Refer to page 2 69 Select this item to access another measure ment limits editor to edit SEM Inband Spurious limits Refer to page 2 69 Sets the upper limit for the RM
120. election measurement results are only available for the selected timeslot Sets the threshold that determines if a timeslot is active or inactive A timeslot that is transmitting above this level is considered active relative to the maximum power level Yes or No Use this setting to include or exclude the I Q offsets in the error vector magnitude results NOTE Most modulation parameter changes do not take effect until the next Run cycle or analysis cycle Selects the method used to set the parameters in this menu The settings are automatically determined without requiring the user to set parameters for the following Sync DL Sync UL and Scrambling Code All settings can be individually set without affecting other settings in the menu Sets the code number of the downlink pilot pattern You can set the value from 0 to 31 Sets the code number of the uplink pilot pattern You can set the value from 0 to 255 Selects the scrambling code This value is also used for the basic midamble code You can set the value from 0 to 127 Sets K for all timeslots except 0 You can set the value from 2 to 16 Sets K for timeslot 0 You can set the value from 2 to 16 Sets the Switching Point between Uplink and Downlink timeslots You can set the value from 1to 6 Sets the filter to be used for the measurement You can select RootRaisedCosine RaisedCosine or None Select the filter based on the filter used for transmission of the s
121. equency Measurement Bandwidth Fail if signal exceeds Beginning Absolute Limit Ending Absolute Limit Beginning Relative Limit Ending Relative Limit A Yes 30 MHz 1 GHz 100 kHz Absolute 36 dBm 36 dBm 30 dBc 30 dBc B Yes 1 GHz 1 84 GHz 1 MHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc Table 2 10 Uplink SEM inband spurious default limits Zone Enable Beginning Frequency Ending Frequency Measurement Bandwidth Fail if signal exceeds Beginning Absolute Limit Ending Absolute Limit Beginning Relative Limit Ending Relative Limit 2 74 A Yes 30 MHz 1 GHz 100 kHz Absolute 36 dBm 36 dBm 30 dBc 30 dBc B Yes 1 GHz 3 GHz 100 kHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc 55 dBm 55 dBm 54 dBc 54 dBc c No 1 84 GHz 2 035 GHz 1 MHz Absolute 15 dBm 15 dBm 30 dBc 30 dBc c No 925 MHz 935 MHz 100 kHz Absolute 15 dBm 15 dBm 30 dBc 30 dBc 55 dBm 55 dBm 49 dBc 49 dBc D No 2 035 GHz 3 GHz 1 MHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc D No 935 MHz 960 MHz 100 kHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc 55 dBm 55 dBm 30 dBc 30 dBc E No 3 GHz 8 GHz 1 MHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc E No 1 805 GHz 1 88 GHz 100 kHz Absolute 30 dBm 30 dBm 30 dBc 30 dBc WCA230A amp WCA280A TD SCDMA Analysis Software DS as Syntax and Commands a A O O GPIB Commands This
122. er measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration lt numeric_value gt DIRection LIMit STATe lt boolean gt SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration Sets or queries the channel bandwidth for the channel power measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration lt numeric_value gt SENSe TD_SCDMA CHPower BANDwidth BWIDth INTegration Arguments lt numeric_value gt lt NRf gt specifies the channel bandwidth for the channel power measurement Range Bin bandwidth x 8 to full span Hz Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA CHPower BANDwidth INTegration 2 5MHz sets the channel bandwidth to 2 5 MHz for the channel power measurement in the TD SCDMA analysis SENSe TD_SCDMA CHPower DIRection Queries which limit table is used for the channel power measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA CHPower DIRection Returns UPLink Uplink DOWNIink Downlink Measurement Modes DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software 3 79 GPIB Commands SENSe TD_ SCDMA CHPower LIMit STATe 3 80 Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the limit testing for the channel power measurement in the TD SCDMA analysis SENSe TD_SCDMA CHPower LIMit STATe
123. ermodulation measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA IM BANDwidth BWIDth INTegration lt numeric_value gt DIRection LIMit FORDer STATe lt boolean gt TORDer STATe lt boolean gt SCOFfset lt numeric_value gt SENSe TD_SCDMA IM BANDwidth BWIDth INTegration Sets or queries the channel bandwidth for the intermodulation measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA IM BANDwidth BWIDth INTegration lt numeric_value gt SENSe TD_ SCDMA IM BANDwidth BWIDth INTegration Arguments lt numeric_value gt lt NRf gt specifies the bandwidth of the main channel for the intermodulation measurement Range Bin bandwidth x 8 to full span Hz Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA BANDwidth INTegration 2 5MHz sets the channel bandwidth to 2 5 MHz for the intermodulation measurement in the TD SCDMA analysis 3 88 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA IM DIRection Syntax Returns Measurement Modes Queries which limit table is used for the IM measurement in the TD SCDMA analysis SENSe TD_SCDMA IM DIRection UPLink Uplink DOWNIink Downlink DEMTD_SCDMA SENSe TD_ SCDMA IM LIMit FORDer STATe Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the fifth order limit testing for the intermodulation measurement
124. ertical Stop menu is selected WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Spectrum Emission Mask Measurement The spectrum emission mask SEM measurement verifies that the base station is not transmitting excessive power outside of its designated channel The SEM measurement is not gated so it does not operate on any particular timeslot There are two SEM measurements available selected from the measurement setup menu based on different sets of limits Offset From Channel and Inband Spurious Figures 2 19 and 2 20 show examples of the spectrum emission mask measurements Tektronix WCA 280A 0 v PAUSE Frequency Span Input Att Hz Sp Hz refsde Stam step BW Peak Absolne Peak Relative r 25 GH 85 GHz 30 k 4 3m 3 Ok if Measurement gt gt 2 a L results r if TD SCDMA Spectrum Emission Mask Figure 2 19 Spectrum emission mask offset from channel measurement WCA230A amp WCA280A TD SCDMA Analysis Software 2 43 TD SCDMA Measurements TD SCDMA Spectrum Em Figure 2 20 Spectrum emission mask inband spurious measurement Setting the Timing The TD SCDMA spectrum emission mask measurement only operates in freerun Parameters mode and therefore does not display timing settings when pressing the TIMING menu Setting the Measurement Once you ve selected the spectrum emission mask measurement you can set the Parameters measurement parameters for SEM using
125. evel in dBc NOTE This command is only available when SENSe TD_SCDMA SEMask RCHannel MODE command selects MANual Syntax SENSe TD_SCDMA SEMask RCHannel LEVel lt numeric_value gt SENSe TD_SCDMA SEMask RCHannel LEVel Arguments lt numeric_value gt lt NRf gt specifies the reference level Range 100 to 30 dBm Measurement Modes DEMTD_SCDMA Example SENSe TD_ SCDMA SEMask RCHannel LEVel 10dBm sets the reference channel level to 10 dBm for the spectrum emission mask measurement in the TD SCDMA analysis Related Commands _ _ SENSe TD_SCDMA SEMask RCHannel MODE 3 94 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA TOOMask Subgroup The SENSe TD_SCDMA TOOMask commands set up the conditions related to the transmit on off mask measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA TOOMask DIRection LIMit LEVel ONOFf STATe lt boolean gt MRAMp STATe lt boolean gt SENSe TD_SCDMA TOOMask DIRection Queries which limit table is used for the transmit on off mask measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA TOOMask DIRection Returns UPLink Uplink DOWNIink Downlink Measurement Modes DEMTD_SCDMA SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe Sets or queries the enable or disable transmit on off limit checking for the transmit on off mask measurement in the TD SCDMA analysis
126. f bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 Measurement Modes DEMTC_SCDMA Example FETCh TD_SCDMA SPECtrum IM might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the intermodulation measurement under the TD_SCDMA Related Commands INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software 3 49 GPIB Commands FETCh TD_SCDMA SPECtrum OBWidth Syntax Arguments Returns Measurement Modes Example Related Commands Fetches the spectrum waveform data of the occupied bandwidth measurement under the TD SCDMA standard FETCh TD_SCDMA SPECtrum OBWidth None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 DEMTC_SCDMA FETCh TD_SCDMA SPECtrum OBWidth might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the occupied bandwidth measurement under the TD SCDMA standard INSTrument SELect FETCh TD_SCDMA SPECtrum SEMas
127. f mask measure ment in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA OBWidth Subgroup The SENSe TD_SCDMA OB Width commands set up the conditions related to the occupied bandwidth OBW measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA OBWidth DIRection LIMit STATe lt boolean gt PERCent lt numeric_value gt SENSe TD_SCDMA OBWidth DIRection Queries which limit table is used for the occupied bandwidth measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA OBWidth DIRection Returns UPLink Uplink DOWNIink Downlink Measurement Modes DEMTD_SCDMA SENSe TD_ SCDMA OBWidth LIMit STATe Sets or queries whether to enable or disable the limit testing for the OBW measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA OBWidth LIMit STATe lt boolean gt SENSe TD_SCDMA OBWidth LIMit STATe Arguments lt boolean gt ON OFF 1 0 ON or 1 enables the limit testing OFF or 0 disables the limit testing Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA OBWidth LIMit STATe ON sets the limit testing to ON for the OBW measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 97 GPIB Commands SENSe TD_SCDMA OBWidth PERCent Sets or queries the occupied bandwidth for the OBW measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA OBWidt
128. gs A step size menu only displays if the Horizontal Start or Vertical Offset menu is selected WCA230A amp WCA280A TD SCDMA Analysis Software 2 19 TD SCDMA Measurements PhaseErr Display When you select Mainview Content from the VIEW DEFINE menu and then select PhaseErr from the Mainview Content submenu changes of phase error over time for a single code channel are displayed for each symbol See Figure 2 10 The measured values for modulation accuracy are described the section Modulation Accuracy Measurement Readouts beginning on page 2 21 Tektronix WCA 280A 0 4 FiA PAUSE Frequency Span Input Att Demod Frequency 1 500000 GHz Timeslot TS5 DL Subframe 7 1 Midamble E YM rms peak Comp E M rms peak Rho nter 1 5 GHz Span 2 MHz Symbol number Comp Mag Error rms 0 Marker O sym fcode 0 Error value peak 9 s0 SF16 0 QPSK m Selected code Comp Phase Error rms 6 c 8 T OVSF code peak g Spreading factor Frequency Error Modulation type 1 Q Imbal I Q Offset 55 74 dB 50 mdeg Vertical scale Vertical start TD SCDMA Modulatipn Accuracy Expanded measurement Horizontal scale results displayed when ies Horizontal start mainview is selected Figure 2 10 PhaseErr display You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Sets the start value and the scale of the vertical axis automati cally to display the entir
129. gt lt Num_byte gt is the number of bytes of the data that follows lt Data n gt is the absolute power for each symbol in dBm 4 Four byte little endian floating point format specified IEEE 488 2 Measurement level n Max 6400 Invalid data is returned as 1000 DEMTD_SCDMA FETCh TD_SCDMA TAMP1i tude SFSummary might return 525600xxx 25600 bytes of floating point data as time domain amplitude data of the subframe summary measurement of the TD SCDMA standard INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software 3 51 GPIB Commands FETCh TD_SCDMA TAMPlitude TOOMask Syntax Arguments Returns Measurement Modes Example Fetches the results of the time domain amplitude data of the transmit on off mask measurement under the TD SCDMA standard NOTE There is no READ subsystem for the TAMPlitude commands FETCh TD SCDMA TAMP1i tude TOOMask None lt Num_digit gt lt Num_byte gt lt Data1 1 gt lt Data1 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Data n gt is the absolute power for each symbol in dBm 4 Four byte little endian floating point format specified IEEE 488 2 Measurement level n Max 512000 1024 points x 500 frames Invalid data is returned as 1000 DEMTD_SCDMA FETCh TD_SCDMA TAMP1i tude TOOMask might return 525600xx
130. h Fail if signal exceeds Rel OR Abs Beginning Frequency Ending Frequency easurement Bandwidth Offset from Carrier Upper Fail if signal exceeds Beginning Absolute Limit Ending Absolute Lirit Beginning Relative Limit Go to page 2 of 2 Ending Relative Lirnit TD SCDMA Spectrum Emis Figure 2 28 Spectrum emission mask measurement limits editor Table 2 3 lists the measurement limit items that can be set in the SEM measure ment limits editor Table 2 4 Measurement limit items for the spectrum emission mask measurements Item Enable Beginning Frequency Ending Frequency Measurement Bandwidth Description Limit ranges Enables or disables use of the mask in the specified zone A B C D or E Sets the beginning frequency for the zone 3 GHz to 3 GHz WCA230A 8 GHz to 8 GHz WCA280A Sets the ending frequency for the zone 3 GHz to 3 GHz WCA230A 8 GHz to 8 GHz WCA280A Sets the measurement bandwidth 1kHz to 10 MHz WCA230A WCA280A WCA230A amp WCA280A TD SCDMA Analysis Software 2 69 Editing the Measurement Limits Table 2 4 Measurement limit items for the spectrum emission mask measurements cont Item Description Limit ranges Offset from Carrier 1 Specifies which offset side is to be measured You can select Upper positive Lower negative or Both Fail if signal e
131. h PERCent lt numeric_value gt SENSe TD SCDMA OBWidth PERCent Arguments lt numeric_value gt lt NRf gt specifies the occupied bandwidth Range 80 to 99 99 default 99 Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA OBWidth PERCent 95PCT sets the occupied bandwidth to 95 for the OBW measurement in the TD SCDMA analysis 3 98 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands MMEMory Commands The MMEMory commands allow you to manipulate files on the hard disk or floppy disk For details on file manipulation refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers User Manual Command Tree MMEMory LOAD LIMit lt file_name gt STORe LIMit lt file_name gt STABle lt file_name gt gt MMEMory LOAD LIMit Loads limits from the specified file Syntax MMEMory LOAD LIMit lt file_ name gt Arguments lt file_name gt lt string gt specifies the file from which to load limits The file extension is Imt Measurement Modes DEMTD_SCDMA Example MMEMory LOAD LIMit C My Documents Test 1mt loads limits from the file Test Imt in the My Documents folder MMEMory STORe LIMit Stores the current limits in the specified file Syntax MMEMory STORe LIMit lt file name gt Arguments lt file_name gt lt string gt specifies the file in which to store the current limits The file extension is Imt Measurement Modes DEMTD_SCDMA Example M
132. he digital modulation related measurement under TD SCDMA standard Command Tree _ DISPlay TD_SCDMA DDEMod SView FORMat RADix 2X SCALe OFFSet PDIVision RANGe y SCALe FIT FULL OFFSet PDIVision PUNit RANGe ZOOM MCONtrol STARt END TSLot START WCA230A amp WCA280A TD SCDMA Analysis Software SPECtrum MACCuracy SCONste EVM MERRor PERRor CDPower CVSFrame CVSYmbo1 PCGRam TPVTime LPVTime SPVTime STable BINary OCTal HEXadecimal lt numeric_value gt lt numeric_value gt lt numeric_value gt lt numeric_value gt RELative ABSolute RELative ABSolute lt numeric_value gt 3 25 GPIB Commands DISPlay TD_SCDMA DDEMod SVlew FORMat Selects or queries the display format of the subview in the digital modulation related measurement Syntax DISPlay TD_SCDMA DDEMod SVIew FORMat SPECtrum MACCuracy SCONste EVM MERRor PERRor CDPower CVSFrame CVSYmbol PCGRam TPVTime LPVTime SPVTime STable DISPlay TD_SCDMA DDEMod SVIew FORMat Arguments The arguments and display formats are listed below Argument SPECtrum MACCuracy SCONste EVM MERRor PERRor CDPower CVSFrame CVSYmbol PCGRam TPVTime LPVTime SPVTime STABle Measurement Modes DEMTD_SCDMA Display format Spectrum Modulation accuracy Symbol constellation Error vector magnitude EVM Amplitude magnitude error Phase error Code domain power Code domain power versus subframe
133. ignal being tested for accurate measurement results For RF measurements the filters only affect the numerical measurement readouts not the waveform displays For demodulation measurements the filters can affect the numerical readouts and the waveform displays Selects the subframe to be analyzed The subframe selection is dependent on the number of subframes that have been analyzed which is slightly less than the length set as the Analysis Interval in the Timing menu After allowing the instrument to analyze a number of subframes you can use this control to view the measurement results for a different subframe WCA230A amp WCA280A TD SCDMA Analysis Software 2 63 TD SCDMA Measurements Table 2 2 Global demodulation measurement parameter settings cont Parameter Limits Select Timeslot Select Code TPC and SS in Data 2 Yes No TPC and SS Symbol Count One 16 SF 2 64 Description Displays the limits editor to set the pass fail limits for measurements The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot The Spectrum Emission Mask has separate limit tables accessed through the main table and its own uplink downlink controls Refer to Editing the Measurement Limits on page 2 65 for more information Sets the timeslot TS for the current measurement The control cycles through TSO DP downlink pilot UP
134. in Power Measurement Readouts beginning on page 2 32 Marker readout Demod Frequency Timeslot TSO DL Si Vertical scale Number of Active Channels Vertical start Horizontal scale Measurement results Horizontal start Figure 2 13 CDP by subframe display You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Sets the scale of the horizontal axis number of sub frames Horizontal Start Sets the subframe number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis 2 28 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Vertical Stop dB Sets the maximum top value of the vertical axis Full Scale default scaling Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays if the Horizontal Start or Vertical Stop menu is selected m Y Axis Selects whether to represent the Y axis with relative values or absolute values When you select Relative the Y axis represents the power relative to the total power of all channels When you select Abs
135. ion accuracy are described the section Modulation Accuracy Measurement Readouts beginning on page 2 21 Tekironix WCA 280A PAUSE Frequency 1 5 GHz Acquisition Length 3 Span Input Att dBm Demod Frequency 1 500000 GHz i Timeslot TS5 DL S 10 i dB Midamble EVI rms peak Comp E M rms peak Rho Comp Mag Error rms lar ea Symbol number peak 6 Selected code Comp Phase Error rms g 993 46 SK OVSF code peak 17 2 A Spreading factor Frequency Error Modulation type I Q Imbal 1 0 Offset Vertical scale A Vertical start TD SCDMA Modulatign Accuracy Expanded measurement Horizontal scale gt results displayed when Horizontal start mainview is selected Figure 2 7 Symbol constellation display You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu 2 14 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Measurement Content Selects vector or constellation display Vector Selects vector display A signal represented with phase and amplitude is displayed in rectangular I and Q coordinates Each red point indicates a symbol position on the measured signal and the yellow trace indicates the locus of the signal between symbols Constellation Selects constellation display It is the same as the vector display except that only symbols of the measured signal are indicated in red and th
136. is set to LPVTime DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol MRPower None DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol MRPower Sets the zoom to the maximum transmit mid ramp power WCA230A amp WCA280A TD SCDMA Analysis Software 3 23 GPIB Commands DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol OPOWer Syntax Arguments Measurement Modes Example Sets the zoom to the maximum transmit off power in the main view during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod MVIew FORMat is set to LPVTime DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol OPOWer None DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol OPOWer Sets the zoom to the maximum transmit off power DISPlay TD_SCDMA DDEMod MVlew ZOOM TSLot START Syntax Arguments Measurement Modes Example 3 24 Sets the zoom to the timeslot start in the main view during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod MVIew FORMat is set to TPVTime DISPlay TD_SCDMA DDEMod MVIew ZOOM TSLot START None DEMTD_SCDMA DISPlay TD SCDMA DDEMod MVIew ZOOM TSLot START Sets the zoom to the timeslot start WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands DISPlay TD_SCDMA DDEMod SVlew Subgroup The DISPlay TD_SCDMA DDEMod commands control display of the subview for t
137. k 3 50 Syntax Arguments Returns Fetches the spectrum waveform data of the spectrum emission mask measure ment under the TD SCDMA standard FETCh TD_SCDMA SPECtrum SEMask None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Measurement Modes Example Related Commands DEMTD_SCDMA FETCh TD_SCDMA SPECtrum SEMask might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the spectrum emissions mask measurement under the TD SCDMA standard INSTrument SELect FETCh TD_SCDMA TAMPlitude SFSummary Syntax Arguments Returns Measurement Modes Example Related Commands Fetches the results of the time domain amplitude data of the subframe summary measurement under the TD SCDMA standard NOTE There is no READ subsystem for the TAMPlitude commands FETCh TD_SCDMA TAMP1 i tude SFSummary None lt Num_digit gt lt Num_byte gt lt Datal 1 gt lt Datal 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte
138. l Stop Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Timing Parameters for Demodulation Measurements The timing parameters for the measurements requiring demodulation are global settings all demodulation measurements use the same parameters The parame ters listed in Table 2 1 affect the following measurements Subframe Summary Timeslot Summary Modulation Accuracy Transmit On Off Mask Code Domain Power Symbol Table You can set the following timing parameters using the TIMING menu when a demodulation measurement is selected Press the TIMING key to open the TIMING menu Table 2 1 Global demodulation timing parameter settings Parameter Acquisition Subframes Acquisition Length s Acquisition History Analysis Interval chips Analysis Offset chips Spectrum Length Spectrum Offset s Description Sets the acquisition length in subframes The range depends on the acquisition memory size and the span setting A minimum of three subframes is required when phase reference is set to midamble Seven subframes are required when phase reference is set to pilot Displays the acquisition length in seconds Specifies the number of the block to display and analyze The latest block is number zero Older blocks have larger negative numbers Sets the analysis interv
139. lection is a global setting for all TD SCDMA demodula tion and RF measurements Select Timeslot Sets the timeslot for the measurement The control cycles through timeslots 0 DP downlink pilot UP uplink pilot TS1 TS2 TS3 TS4 TS5 and TS6 The timeslot selection is a global selection for all TD SCDMA demodulation and RF measurements Measurement Filter Shape Sets the filter to be used for the measure ment You can select None RootRaisedCosine or RaisedCosine The filters only affect the numerical measurement readouts not the waveform display Time Reference Selects the timing reference This setting is global to all RF measurements m DwPts Sets the downlink pilot as a time reference for each subframe This setting should only be used when the downlink pilot is present in the signal under test Uplink TS Pattern Sets the timeslots indicated in the Uplink TS Pattern setting as the time reference for each subframe Specifying the timeslot pattern allows the instrument to determine proper timeslot identification in the absence of the downlink pilot time reference Uplink TS Pattern Specifies which timeslots are the active uplink timeslots The uplink timeslot pattern is a concatenation of the uplink timeslots For example an uplink TS pattern of 13 indicates TS1 and TS3 are active uplink timeslots The default pattern of 123 indicates TS1 TS2 and TS3 are active uplink timeslots Integer patterns between 1 and 123456
140. lew Y SCALe PDIVision 100 dB DISPlay TD_SCDMA DDEMod SVlew Y SCALe PUNit dBm DISPlay TD_SCDMA SPECtrum subgroup DISPlay TD_ SCDMA SPECtrum X SCALe OFFSet 1 4975 GHz DISPlay TD_SCDMA SPECtrum X SCALe PDIVision 1 5 MHz DISPlay TD_SCDMA SPECtrum Y SCALe OFFSet 0 DISPlay TD_SCDMA SPECtrum Y SCALe PDIVision 10 dB div WCA230A amp WCA280A TD SCDMA Analysis Software B 1 Appendix B Factory Default Settings Table B 2 Factory default settings SENSe commands Header SENSe TD_SCDMA subgroup SENSe TD_SCDMA BLOCK SENSe TD_SCDMA MEASurement SENSe TD_SCDMA ACQuisition subgroup SENSe TD_SCDMA ACQuisition SFRames SENSe TD_SCDMA ACQuisition SEConds SENSe TD_SCDMA ACQuisition HIS Tory SENSe TD_SCDMA ANALysis subgroup SENSe TD_SCDMA ANALysis INTerval SENSe TD_SCDMA ANALysis OFFSet CHIPs SENSe TD_SCDMA ANALysis OFFSet DFRequency SENSe TD_SCDMA ANALysis OFFSet IQ SENSe TD_SCDMA ANALysis CHANnel THReshold SENSe TD_SCDMA ANALysis TSLot SENSe TD_SCDMA ANALysis TSLot THReshold SENSe TD_SCDMA ANALysis REFerence SUBFrame SENSe TD_SCDMA ANALysis Reference TFPHase SENSe TD_SCDMA SPECtrum subgroup SENSe TD_SCDMA SPECtrum OFFSet SENSe TD_SCDMA SELect subgroup SENSe TD_SCDMA SELect SFRame SENSe TD_SCDMA SELect TSLot SENSe TD_SCDMA SELect CODE SENSe TD_SCDMA MODulation subgroup SENSe T
141. ment Measurement Filter Shape Sets the filter to be used for the measurement You can select None RootRaisedCosine or RaisedCosine This setting is only available when Ref Channel Select is set to Auto The filters only affect the numerical measurement readouts not the waveform display Limits Displays the limits editor to set the pass fail limits for measure ments The limits editor that displays is either the uplink or downlink editor determined by whether the selected timeslot is an uplink or downlink timeslot Refer to Editing the Measurement Limits on page 2 65 for more information Scroll Table Scrolls the table displayed in the view Changing the View You can change the contents in the view using the VIEW DEFINE menu Press Contents the VIEW DEFINE key to open the menu Grid Style Sets the grid style in the view You can select Off Fix or Flex For Flex the grid is changed depending on frequency or span setting Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Hz Sets the scale of the horizontal axis Horizontal Start Hz Sets the first left value of the horizontal axis Vertical Scale dB Sets the scale of the verti
142. ments Refer to Using the Measurement Limits Editor on page 2 65 for procedures to edit the measurement limits Tables 2 5 and 2 6 list the default limit settings for the downlink and uplink measurements excluding SEM Tables 2 8 through 2 9 list the default limit settings for the downlink and uplink SEM measurements NOTE The Default all limits and Default limits side keys reset the limit settings to their default values of the currently displayed limits editor table Other limit editor tables are not affected Table 2 5 Downlink main table default limits Limit item Channel power ACLR 1st Lower Channel ACLR 1st Upper Channel ACLR 2nd Lower Channel ACLR 2nd Upper Channel Intermod 3rd Order Intermod 5th Order Composite RMS EVM Composite Peak EVM Peak Code Domain Error Rho OBW Tx OFF Level Tx OFF Mid Ramp Level e l n l xs a zZ Enable Lower 150 Yes 39 2 Yes 39 2 Yes 44 2 44 2 Yes N A Yes N A Yes N A o N A A 0 0 9846 Yes N A Yes N A Yes N A Table 2 6 Uplink main table default limits Limit item Channel power ACLR 1st Lower Channel ACLR 1st Upper Channel ACLR 2nd Lower Channel 2 72 m oe Enable Lower 0 150 Yes 3 Yes 33 Yes 43 Upper N A N A N A N A N A 39 2 44 2 12 5 31 N A 1 6M 41 3 Upper N A N A N A N A Units dBm dB dB dB dB dBc dBc percent percent dB N A Hz dBm dBm Units dBm dB dB dB
143. modulation Measurements beginning on page 2 62 for a description of the measurement parameters NOTE The measurement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle You can change the view contents in the overview subview and mainview using the VIEW DEFINE menu Press the VIEW DEFINE key to open the menu m Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the VIEW SELECT key to change the selected view m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Mainview Content The mainview content display can be changed to display one of the modulation accuracy related measurements with its numerical measurement results You can select Composite Constellation Symbol Constellation Symbol Error Vector Magnitude Magnitude Error or Phase Error When selecting the mainview the expanded numerical measurement resul
144. n BW Sets the integration bandwidth You can set the value from 500 kHz to 5 MHz Measurement Filter Shape Sets the filter to be used for the measure ment You can select None RootRaisedCosine or RaisedCosine The filters only affect the numerical measurement readouts not the waveform display Time Reference Selects the timing reference This setting is global to all RF measurements DwPts Sets the downlink pilot as a time reference for each subframe This setting should only be used when the downlink pilot is present in the signal under test Uplink TS Pattern Sets the timeslots indicated in the Uplink TS Pattern setting as the time reference for each subframe Specifying the timeslot pattern allows the instrument to determine proper timeslot identification in the absence of the downlink pilot time reference WCA230A amp WCA280A TD SCDMA Analysis Software 2 59 TD SCDMA Measurements 2 60 Changing the View Contents Uplink TS Pattern Specifies which timeslots are the active uplink timeslots The uplink timeslot pattern is a concatenation of the uplink timeslots For example an uplink TS pattern of 13 indicates TS1 and TS3 are active uplink timeslots The default pattern of 123 indicates TS1 TS2 and TS3 are active uplink timeslots Integer patterns between 1 and 123456 are valid This setting is used when the Time Reference is set to Uplink TS Pattern NOTE UpPts can also be active but does not need to
145. ng Point link direction DwPts Pattern Multiframe Position Measurement Gf DwPts RMS power eal i 7 Marker UpPts RMS power q j 3 GP RMS powe Go to page 2 TD SCDMA a a Subframe numerical Blue area represents readout the selected timeslot NOTE The subframe marker is linked to overview window Turn on the overview marker to see position of the subframe within overall acquisition Figure 2 4 Subframe summary Display Elements 2 6 The following information is shown in the subframe summary measurement display m Overview The overview display area can contain the power versus time or spectrogram measurement displays WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements m Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spectrum display m Mainview The mainview display area displays only the power versus time graph To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 7 for more information Setting the Timing You can set timing parameters for the subframe summary acquisition by using Parameters the TIMING menu Press the TIMING key to open the menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing parameters for demodulation measurements are global settings for all TD
146. ng the Measurement Limits This section describes how to set measurement limits to perform pass fail testing for the TD SCDMA measurements Refer to Measurement Limit Defaults on page 2 72 for information about the default settings of each measurement limit Using the Measurement Limits Editor All measurement limits are set in the measurement limits editor which you access from the Limits side key on the MEAS SETUP menu The Limits editor menu is divided into two groups uplink and downlink limits The limit menu that displays when you press the Limits side key is dependent on the currently selected timeslot and the timeslot switching point except for the SEM measurements If the timeslot is an uplink timeslot the uplink limits editor displays If the timeslot is a downlink timeslot the downlink limits editor is displayed The SEM Limits editor display is dependent on the Uplink or Downlink setting in the SEM measurement parameters NOTE There are six separate limits editor tables Downlink limit editor main Uplink limit editor main SEM Offset From Channel downlink editor SEM Offset From Channel uplink editor SEM Inband Spurious downlink editor SEM Inband Spurious uplink editor Figure 2 27 shows the measurement limits editor downlink for the TD SCDMA measurements When changing limits the pass fail status of the measurements do not update until the next run or analysis cycle or changing the timeslot subfram
147. nit on the Y of main view is set to RELative selects Relative power value When the unit on the Y of main view is set to ABSolute selects Absolute power value 4 byte little endian floating point format specified IEEE 488 2 n Max 15 CVSFrame lt Num_digit gt lt Num_byte gt lt SFPower 0 gt lt SFPower 1 gt lt SFPower n 1 gt lt SFPower n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt SFPower n gt is the relative dB Absolute dBm power value of each code in each subframe When the unit on the Y of main view is set to RELative selects Relative power value When the unit on the Y of main view is set to ABSolute selects Absolute power value 4 byte little endian floating point format specified IEEE 488 2 n Max 2048 WCA230A amp WCA280A TD SCDMA Analysis Software 3 39 GPIB Commands Measurement Modes Example Related Commands CVS Ymbol lt Num_digit gt lt Num_byte gt lt S YPower 0 gt lt S YPower 1 gt lt S YPower n 1 gt lt S Y Power n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt S YPower n gt is the relative dB Absolute dBm power value of each symbol When the unit on the Y of main view is set to RELative selects Relative power value When the unit on the Y of main view
148. nitude error Phase error Symbol table Power versus time 0 Hz to 3 GHz WCA230A 200 dBm to 100 dBm 0 Hz to 3 GHz WCA230A 15999 to 0 frame 63999 to 0 frame Option 02 16 codes Relative 200 dB to 100 dB Variable Relative 200 dB to 100 dB Maximum 4000 subframes Standard Absolute 140 dBm to 160 dBm 1000 subframes Opt 02 Data Variable based on spreading factor Relative 200 dB to 100 dB Maximum 704 Absolute 140 dBm to 160 dBm 16 codes 1000 to 0 subframes Standard c 2047 to 0 subframes Option 02 Fixed Fixed 100 to 200 300 to 300 675 deg to 675 deg Timeslot Summary full burst 0 to 200 dBm to 100 dBm 675 usec and 6 25 usec additional pre post timeslot data and chip position within subframe Subframe Summary 5 0 msec to 0 msec 6400 chip Transmit On Off Mask same as subframe summary WCA230A amp WCA280A TD SCDMA Analysis Software C 1 Appendix C Setting Range C 2 WCA230A amp WCA280A TD SCDMA Analysis Software Index Index A ACLR measurement 2 39 Acquisition history 2 61 Acquisition length 2 61 Acquisition subframes 2 61 Active channel threshold 2 62 Active channels 2 26 CDP display active channels 2 26 inactive channels 2 26 Active timeslot threshold 2 63 Address Tektronix viii All active TS 2 63 Analysis area 2 6 Analysis control demodulation 2 62 Analysis interval 2 61 Analysis offset 2 61 Analyze 2 62 Auto 2 63 Averag
149. nt Limits Editor 0 2 0 0 cece eee eee ee eee 2 65 Saving and Loading Measurement Limits 0 000000 2 71 Measurement Limit Defaults 0 0 eee eee eee ee eee 2 72 Syntax and Commands GPIB Commands 0 05 eves cites eer ee Sareed ws be Geek bas Bae bs 3 1 CONFigure Commands vsr anert anena daan ce eect eens 3 2 DISPlay Commands prassa oi sanan na e a a A E ARE A AN 3 2 sFETCh Commands seny caw ed nana tes EAN ea EAE oR E T AN 3 5 SREAD CommandSi sina seanina hata eae A Mena ADEA ee 3 6 SENSE Commands sina cas wed Reka eA ee Rae AS Se ee 3 7 MMEMory Commands 0 eee cece eee teen nen 3 10 CONFigure Commands c cece eee e cece ceeececees 3 11 CONFigure TD_SCDMA ACLR 0 2 cece cence ee een eens 3 11 CONFigure TD_SCDMA CDPower 00 0 cee eee cece eee eee 3 11 CONFigure TD_SCDMA CHPower 00 0 cee eee ence eee eee 3 12 CONFigure TD_SCDMA IM 0 c cece eee ee eet ene een a 3 12 CONFigure TD_SCDMA MACCuracy 2 cece cece eee eee 3 12 CONFigure TD_SCDMA OBWidth 0 0 2 c ee eee ee eee ee nee 3 13 WCA230A amp WCA280A TD SCDMA Analysis Software i Table of Contents CONFigure TD_SCDMA SEMask 0 0000 c eee eee CONFigure TD_SCDMA SFSummaty 00000000 eee CONFigure TD_SCDMA STABle 0 0 0 0 cece eee CONFigure TD_SCDMA TOOMask 00000000000 CONFigure TD_SCDMA TSSummary
150. nt channel ACPR in dBc Measurement Modes DEMTD_SCDMA Example READ TD_SCDMA ACLR might return 0 2 045E 001 6 461E 001 4 379E 001 6 576E 001 6 753E 001 for the ACLR measurement under the TD SCDMA standard Related Commands INSTrument SELect READ TD_SCDMA CHPower Obtains the results of the channel power measurement under the TD SCDMA standard Syntax READ TD_SCDMA CHPower Arguments None Returns lt Pass_fail gt lt chpower gt lt power_density gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Chpower gt lt NRf gt is the channel power measured value in dBm lt Power_density gt lt NRf gt is the power density measured value in dBm Hz Measurement Modes DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software 3 55 GPIB Commands Example READ TD_SCDMA CHPower might return 1 2 0339E 001 8 1238E 001 for the channel power measure ment under the TD SCDMA standard Related Commands INSTrument SELect READ TD_SCDMA IM Obtains the results of the intermodulation measurement under the TD SCDMA standard Syntax READ TD SCDMA IM Arguments None Returns lt Pass_fail gt lt L_channel gt lt U_channel gt lt L3_lower gt lt L3_upper gt lt U3_lower gt lt U3_Upper gt lt L5_lower gt lt L5_upper gt lt U5_lower gt lt U5_upper gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt L_ch
151. ntent The mainview content display can not be changed from Subframe summary Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key You can set the scale for the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale s Sets the scale of the horizontal axis number of chips or symbols Horizontal Start s Sets the chip number or symbol number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size amount per click of the general purpose knob for changes to the Horizontal Start or Vertical Stop settings The step size menu choices only display when selecting the Horizontal Start or Vertical Stop menus This section describes the measurement readouts displayed in the mainview of the subframe measurement Readout Description Downlink Pilot Sync DL The code number of the downlink pilot pattern Uplink Pilot Sync UL The code number of the uplink pilot pattern Scrambling Code The scrambling code Switching Point The timeslot switching point DwPts Pattern The ro
152. ntrol The measured values for code domain power are described the section Code Domain Power Measurement Readouts beginning on page 2 32 Marker readout Demod Frequency Vertical scale Vertical start m 3 e f 0 15 Measurement results Horizontal scale Horizontal start Figure 2 15 CDP codogram display You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Sets the start value and the scale of the vertical axis to display the entire waveform Horizontal Scale Sets the scale of the horizontal axis Horizontal Start Sets the channel number of the first left value of the horizontal axis m Vertical Size Sets the scale of the vertical axis WCA230A amp WCA280A TD SCDMA Analysis Software 2 31 TD SCDMA Measurements Code Domain Power Measurement Readouts 2 32 m Vertical Start Sets the subframe value at the bottom of the vertical axis Color Scale Sets the scale the value separating the minimum power value from the maximum power value of the color axis The choices are 5 10 20 and 50 dB Color Stop Sets the stop value of the color axis Full Scale Sets the maximum value of the color axis to the reference level m Y Axis Selects whether to represent the Y axis with relative values or absolute values When you select Relative the Y axis represents the power relative to the total power of all
153. o a reference signal The maximum value of the instantaneous error vector magnitude calculated over the midamble of the signal and expressed as a percentage The RMS error vector magnitude calculated on the composite signal over the entire timeslot both data bursts and the midamble and expressed as a percentage The maximum value of the instantaneous error vector magnitude calculated on the composite signal over the entire timeslot both data bursts and the midamble and expressed as a percentage A measure of the desired part of the signal relative to a reference signal The RMS error of the composite signal due to magnitude errors in the signal The maximum value of the instantaneous magnitude error of the composite signal 2 21 TD SCDMA Measurements 2 22 Readout Comp Phase Error rms Comp Phase Error peak Frequency Error 1 Q Imbal 1 Q Offset Description The RMS phase error of the composite signal This measurement is most useful with a constant amplitude signal like a phase shift keyed signal like QPSK when a single channel is active in a timeslot Large phase errors can occur if more than one channel is active since the constellation can have a symbol at or near the origin 0 0 The maximum of the instantaneous phase error of the composite signal The error between the center frequency and the estimated frequency that is derived from the input signal The estimated frequency is b
154. olute the Y axis represents the absolute power of each channel CDP by Symbol Display When you select Mainview Content from the VIEW DEFINE menu and then select CDP by Symbol from the Mainview Content submenu the code domain power for the symbols is displayed see Figure 2 14 The code domain power by symbol shows the despread power for each symbol period of the selected code subframe and timeslot The measured values for code domain power are described the section Code Domain Power Measurement Readouts beginning on page 2 32 Marker readout y Demod Frequency 1 500000 GHz Timeslot TSO DL 14 f n dB Peak Active CDE Vertical scale Code Domain Error Number of Active Channels A Y_ Vertical start Horizontal scale Measurement results Horizontal start Figure 2 14 CDP by symbol display You can set the scale of the display using the VIEW SCALE menu Press the VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to display the entire waveform WCA230A amp WCA280A TD SCDMA Analysis Software 2 29 TD SCDMA Measurements 2 30 Horizontal Scale Sets the scale of the horizontal axis number of symbols Horizontal Start Sets the symbol number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dB Sets the maximum top value of the vertical axis F
155. on measurement parameter SOCEM GS eah a cselay Wis E te 9 9c ale ee oso a Wiahe sw ware tee ane aac 2 62 Table 2 3 Measurement limits items cece eee eeee 2 66 Table 2 4 Measurement limit items for the spectrum emission mask measurements ccc cc cece cece cee ce ere ee ecees 2 69 Table 2 5 Downlink main table default limits 2 72 Table 2 6 Uplink main table default limits 2 72 Table 2 7 Downlink SEM offset from channel default limits 2 73 Table 2 8 Uplink SEM offset from channel default limits 2 73 Table 2 9 Downlink SEM inband spurious default limits 2 74 Table 2 10 Uplink SEM inband spurious default limits 2 74 Table 3 1 CONFigure commands eccececeeceeees 3 2 Table 3 2 DISPlay commands cccecccccccscccceees 3 2 Table 3 3 FETCh commands c cece e ccc ee eee evees 3 5 Table 3 4 READ commands c cece e ccc ee ee eevees 3 6 Table 3 5 SENSe commands ccc ccc ee ccc ee eee evees 3 7 Table 3 6 MMEMory commands eeeeeeeeeeeeeee 3 10 Table A 1 General specifications ccc cece eee ee eee A 1 Table A 2 Measurement specifications sssssusesossesoe A 1 Table B 1 Factory default settings DISPlay commands B 1 Table B 2 Factory default settings SENSe commands B 2 Table C 1 Display format and scale eee c ee ee ween C 1 vi WCA230A amp
156. one lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 DEMTC_SCDMA READ TD SCDMA SPECtrum IM might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the intermodulation measurement under the TD SCDMA standard INSTrument SELect READ TD_SCDMA SPECtrum SEMask Syntax Arguments Returns Obtains the spectrum waveform data of the spectrum emission mask measure ment under the TD SCDMA standard READ TD SCDMA SPECtrum SEMask None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow WCA230A amp WCA280A TD SCDMA Analysis Software 3 59 GPIB Commands Measurement Modes Example Related Commands lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Invalid data is returned as 1000 DEMTD_SCDMA READ TD_SCDMA SPECtrum SEMask might return 510240xxx 10240 bytes of floating point
157. or queries the scrambling code Sets or queries the switching point between uplink and downlink timeslots Sets or queries the Sync_DL value Sets or queries the Sync_UL value Sets or queries the channel bandwidth for the channel power measurement Queries which limit table is used for the channel power measurement in the TD SCDMA analysis Sets or queries whether to enable or disable the limit testing for the channel power measurement Queries which limit table is used for the ACLR measurement in the TD SCDMA analysis Sets or queries the enable or disable adjacent limit testing for the ACLR measurement 3 8 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Table 3 5 SENSe commands cont Header Description SENSe TD_SCDMA MACCuracy subgroup SENSe TD_SCDMA MACCuracy DIRection SENSe TD_SCDMA MACCuracy LIMit EVM PEAK STATe SENSe TD_SCDMA MACCuracy LIMit EVM RMS STATe SENSe TD_SCDMA MACCuracy LIMit PCDerror S TATe SENSe TD_SCDMA MACCuracy LIMit RHO STATe SENSe TD_SCDMA STABle subgroup SENSe TD_SCDMA STABle TPCSs COUNt SENSe TD_SCDMA STABle TPCSs SELect SENSe TD_SCDMA IM subgroup SENSe TD_SCDMA IM BANDwidth BWIDth INTegration SENSe TD_SCDMA IM DIRection SENSe TD_SCDMA IM LIMit FORDer STATe 2 SENSe TD_SCDMA IM LIMit TORDer STATe 2 SENSe TD_SCDMA IM SCOFfset SENSe TD_SCDMA SEMask subgroup SENSe T
158. orm Horizontal Scale Hz Sets the scale of the horizontal axis Horizontal Start Hz Sets the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis m Vertical Stop dBm Sets the maximum top value of the vertical axis m Full Scale Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays when the Horizontal Start or Vertical Stop menu is selected WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements ACLR Measurement Tektronix WCA 280A Frequency Span Input A Main Chan Power Measurement results TD SCDMA ACLR Figure 2 18 ACLR measurement WCA230A amp WCA280A TD SCDMA Analysis Software Lowerl ACLR Lower ACLR The Adjacent Channel Leakage Ratio ACLR measurement measures the amount of power leakage from the desired channel active channel signal to a nearby inactive channel by computing the ratio of the power in the active channel to the power in the inactive channel The nearby channels can be one of the channels to the immediate left or right adjacent channels of the active channel or one channel further away the alternate channels Since the ACLR measurement is made on multiple channels it s recommended that you set th
159. ot available when DISPlay TD_SCDMA DDEMod SVlew FORMat is set to MACCuracy Syntax DISPlay TD_SCDMA DDEMod SVIew X SCALe RANGe lt numeric_value gt DISPlay TD_SCDMA DDEMod SVIew X SCALe RANGe Arguments lt numeric_value gt lt NRf gt specifies the full scale value of the horizontal axis in the subview The valid range depends on the display format Refer to Table C 1 in Appendix C Measurement Modes DEMTD_SCDMA 3 28 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Example DISPlay TD_ SCDMA DDEMod SVIew X SCALe RANGe 512 sets the full scale value of the horizontal axis to 512 chips when the subview displays EVM under the TD SCDMA standard Related Commands DISPlay TD_ SCDMA DDEMod SVIew FORMat DISPlay TD_SCDMA DDEMod SVlew Y SCALe FIT Runs auto scale on the subview during the digital modulation related measure ment The auto scale automatically sets the start value and scale of the vertical axis so that the whole waveform is displayed on the screen Syntax DISPlay TD_SCDMA DDEMod SVIew Y SCALe FIT Arguments None Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod SVIew Y SCALe FIT runs auto scale on the subview under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod SVIew FORMat DISPlay TD_SCDMA DDEMod SVlew Y SCALe FULL Sets the vertical axis in the subview to the default full scale value during the digital modulation related measurement
160. ot selection is a global selection for all TD SCDMA demodulation and RF measurements Power Ratio Specifies the power ratio of the carrier and span regions for calculating OBW You can set the value from 80 to 99 99 The default value is 99 Channel Bandwidth Hz Sets the channel bandwidth for the measure ment Measurement Filter Shape Filters are not implemented for the OBW measurement Time Reference Selects the timing reference This setting is global to all RF measurements DwPts Sets the downlink pilot as a time reference for each subframe This setting should only be used when the downlink pilot is present in the signal under test Uplink TS Pattern Sets the timeslots indicated in the Uplink TS Pattern setting as the time reference for each subframe Specifying the timeslot pattern allows the instrument to determine proper timeslot identification in the absence of the downlink pilot time reference Uplink TS Pattern Specifies which timeslots are the active uplink timeslots The uplink timeslot pattern is a concatenation of the uplink timeslots For example an uplink TS pattern of 13 indicates TS1 and TS3 are active uplink timeslots The default pattern of 123 indicates TS1 TS2 and TS3 are active uplink timeslots Integer patterns between 1 and 123456 are valid This setting is used when the Time Reference is set to Uplink TS Pattern NOTE UpPts can also be active but does not need to be explicitly listed
161. ower scale per division in the main view Sets or queries the unit of the vertical axis in the main view Sets or queries the main view minimum vertical value bottom end Sets the zoom to the transmit mask start in the main view during the digital modulation related measurement Sets the zoom to the transmit mask end in the main view during the digital modulation related measurement Sets the zoom to the maximum transmit mid ramp power in the main view during the digital modulation related measurement Sets the zoom to the maximum transmit off power in the main view during the digital modulation related measurement Sets the zoom to the timeslot start in the main view during the digital modulation related measurement Sets or queries the subview display format Sets or queries the base of symbols on the subview during the TD SCDMA analysis Sets or queries the minimum horizontal value left end in the subview Sets or queries the horizontal or time scale per division in the subview Sets or queries the horizontal full scale value in the subview 3 3 GPIB Commands Table 3 2 DISPlay commands cont Header DISPlay TD_SCDMA DDEMod SVlew Y SCALe FIT DISPlay TD_ SCDMA DDEMod SVlew Y SCALe FULL DISPlay TD_SCDMA DDEMod SVlew Y SCALe OFFSet DISPlay TD_SCDMA DDEMod SVlew Y SCALe PDIVision DISPlay TD_SCDMA DDEMod SVlew Y SCALe PUNit DISPlay TD_SCDMA DDEMod SVlew Y SCALe RANGe
162. p WCA280A TD SCDMA Analysis Software 3 69 GPIB Commands SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern Syntax Arguments Measurement Modes Example Sets or queries the timeslot pattern to be expected in the signal when detecting the subframe timing for the ACLR and the Intermodulation measurements for the TD SCDMA Analysis NOTE This command is only available when SENSe TD_SCDMA ANALysis REFerence TIME is set to UTSPattern SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern lt numeric_value gt SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern lt numeric_value gt Range 1 to 123456 any combination of digits 1 through 6 DEMTD_SCDMA SENSe TD_SCDMA ANALysis REFerence TIME UTSPattern 14 sets timeslots 1 and 4 to uplink timeslots SENSe TD_ SCDMA ANALysis TSLot Syntax Arguments Measurement Modes Example 3 70 Sets or queries the timeslot s to be analyzed in the TD SCDMA analysis SENSe TD_SCDMA ANALysis TSLot ALL CURRent SENSe TD_SCDMA ANALysis TSLot ALL Every timeslot that is active has an active channel is analyzed CURRent Only the current timeslot shown in the Measurement Setup is analyzed DEMTD_SCDMA SENSe TD SCDMA ANALysis TSLot ALL analyzes all timeslots in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA ANALysis TSLot THReshold Syntax Arguments Measuremen
163. r measurement parameters are not shared with other measure ments Press the MEAS SETUP key to open the menu Switching Point timeslot Sets the point where the timeslots switch from uplink to downlink timeslots You can set the value from 1 to 6 The timeslot switching point selection is a global setting for all TD SCDMA demodula tion and RF measurements Select Timeslot Sets the timeslot for the measurement The control cycles through TSO DP downlink pilot UP uplink pilot TS1 TS2 TS3 TS4 TS5 and TS6 The timeslot selection is a global selection for all TD SCDMA demodulation and RF measurements Channel Bandwidth Hz Sets the channel bandwidth for the measure ment Measurement Filter Shape Sets the filter to be used for the measure ment You can select None RootRaisedCosine or RaisedCosine The filters only affect the numerical measurement readouts not the waveform display m Time Reference Selects the timing reference This setting is global to all RF measurements DwPts Sets the downlink pilot as a time reference for each subframe This setting should only be used when the downlink pilot is present in the signal under test Uplink TS Pattern Sets the timeslots indicated in the Uplink TS Pattern setting as the time reference for each subframe Specifying the timeslot pattern allows the instrument to determine proper timeslot identification in the absence of the downlink pilot time reference
164. rameters for Demodulation Measurements beginning on page 2 62 for a description of the measurement parameters NOTE The measurement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle You can change the view contents in the overview subview using the VIEW DEFINE menu Press the DEFINE key to display the VIEW DEFINE menu Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the SELECT key to change the selected view m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display Mainview Content The mainview content display can not be changed from Timeslot summary m Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Scale and Format in the You can set the radix for the display using the VIEW SCALE menu Press the Mainview VIEW SCALE key to open the menu m Radix Sets
165. rameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements You can set the measurement parameters for the code domain power measure ments by using the MEAS SETUP menu Press the MEAS SETUP key to open the menu Refer to Measurement Parameters for Demodulation Measurements beginning on page 2 62 for a description of the measurement parameters NOTE The measurement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle You can change the view contents in the overview subview and mainview using the VIEW DEFINE menu Press the VIEW DEFINE key to open the menu m Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the VIEW SELECT key to change the selected view WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display Mainview Content The mainview content display can be changed to
166. rguments Measurement Modes Example 3 34 Sets or queries the minimum value left edge of the horizontal axis frequency in the spectrum view DISPlay TD_SCDMA SPECtrum X SCALe OFFSet lt numeric_value gt DISPlay TD SCDMA SPECtrum X SCALe OFFSet lt numeric_value gt lt NRf gt specifies the minimum horizontal value in the spectrum view The valid range depends on the measurement frequency band in the SENSe FREQuency BAND command Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers Programmer Manual DEMTD_SCDMA DISPlay TD SCDMA SPECTrum X SCALe OFFSet 100MHZ sets the minimum horizontal value to 100 MHz in the spectrum view under the TD SCDMA standard WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands DISPlay TD_SCDMA SPECtrum X SCALe PDIVision Syntax Arguments Measurement Modes Example Sets or queries the horizontal or frequency scale per division in the spectrum view DISPlay TD SCDMA SPECtrum X SCALe PDIVision lt numeric_value gt DISPlay TD _SCDMA SPECtrum X SCALe PDIVision lt numeric_value gt lt NRf gt specifies the horizontal scale in the spectrum view The valid range depends on the measurement frequency band in the SENSe FREQuency BAND command Refer to the WCA230A amp WCA280A Portable Wireless Communication Analyzers Programmer Manual DEMTD_SCDMA DISPlay TD SCDMA SPECTrum X SCALe PDIVision 100kHz set
167. s Arguments ON or 1 enables the adjacent limit testing OFF or 0 disables the adjacent limit testing Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA ACLR LIMit ADJacent 1 enables the first lower adjacent limit testing for the ACLR measurement in the TD SCDMA analysis 3 82 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA MACCuracy Subgroup The SENSe TD_SCDMA MACCuracy commands set up the conditions related to the modulation accuracy measurement in the TD SCDMA analysis Command Tree SENSe TD_SCDMA MACCuracy DIRection LIMit EVM PEAK STATe lt boolean gt RMS STATe lt boolean gt PCDerror STATe lt boolean gt RHO STATe lt boolean gt SENSe TD_SCDMA MACCuracy DIRection Queries which limit table is used for the modulation accuracy measurement in the TD SCDMA analysis Syntax SENSe TD_SCDMA MACCuracy DIRection Returns UPLink Uplink DOWNIink Downlink Measurement Modes DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software 3 83 GPIB Commands SENSe TD_SCDMA MACCuracy LIMit EVM PEAK STATe Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the PEAK EVM limit checking for the modulation accuracy measurement in the TD SCDMA analysis SENSe TD_SCDMA MACCuracy LIMit EVM PEAK STATe lt boolean gt SENSe TD_SCDMA MACCuracy LIMit EVM PEAK STATe
168. s SENSe TD_SCDMA SEMask MEASurement OFCHannel selects the Offset From Channel type where frequency zones are specified by the difference from the center frequency ISPurious selects the Inband Spurious type in which frequency zones are specified by the absolute values DEMTD_SCDMA SENSe TD_SCDMA SEMask MEASurement ISPurious selects the Inband Spurious limit table for the spectrum emission mask measurement in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 93 GPIB Commands SENSe TD_SCDMA SEMask RCHannel MODE Selects or queries the selecting mode of the reference channel level to measure the spurious emission level in dBc in the TD SCDMA analysis Syntax SENSe TD_SCDMA SEMask RCHannel MODE AUTO MANual SENSe TD_SCDMA SEMask RCHanne1 MODE Arguments The arguments and descriptions are listed below Argument Description AUTO The reference channel level is measured from the input signal for the specified channel bandwidth MANual The reference channel level has to be defined by the command SENSe TD_SCDMA SEMask RCHannel LEVel Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA SEMask RCHannel MODE AUTO sets the reference channel level to be measured from the input signal for the spectrum emission mask measurement in the TD SCDMA analysis SENSe TD_SCDMA SEMask RCHannel LEVel Sets or queries the reference channel level to measure the spurious emission l
169. s or queries which limit table is used for the spectrum emission mask measurement in the TD SCDMA analysis Sets or queries whether to enable or disable the offset from the inband spurious zone limit testing for the spectrum emission mask measurement in the TD SCDMA analysis 3 9 GPIB Commands Table 3 5 SENSe commands cont Header SENSe TD_SCDMA SEMask LIMitOFCHannel ZONE 1 2 3 4 5 STATe SENSe TD_SCDMA SEMask MEASurement SENSe TD_SCDMA SEMask RCHannel MODE SENSe TD_SCDMA SEMask RCHannel LEVel SENSe TD_SCDMA TOOMask subgroup SENSe TD_SCDMA TOOMask DIRection SENSe TD_SCDMA TOOMask LIMit LEVel ONOFf STATe SENSe TD_SCDMA TOOMask LIMit LEVel MRAMp STATe 2 SENSe TD_SCDMA OBWidth Subgroup SENSe TD_SCDMA OBWidth DIRection SENSe TD_SCDMA OBWidth LIMit STATe 2 SENSe TD_SCDMA OBWidth PERcent MMEMory Commands Description Sets or queries the enable or disable zone limit checking for the spectrum emission mask measure ment Sets or queries the limit table type used for limit testing for the spectrum emission mask measurement in the TD SCDMA analysis Sets or queries the reference channel level mode for measuring the spurious emission level Sets or queries the reference channel level for measuring the spurious emission level Queries which limit table is used for the transmit on off mask measurement in the TD SCDMA analysis Sets
170. s the horizontal scale to 100 kHz div in the spectrum view under the TD SCDMA standard DISPlay TD_SCDMA SPECtrum Y SCALe FIT Syntax Arguments Measurement Modes Example Runs autoscale on the spectrum view The auto scale automatically sets the value and scale of the vertical axis so that the whole waveform is displayed on the screen DISPlay TD_SCDMA SPECtrum Y SCALe FIT None DEMTD_SCDMA DISPlay TD_SCDMA SPECtrum Y SCALe FIT runs auto scale on the spectrum view under the TD SCDMA standard DISPlay TD_SCDMA SPECtrum Y SCALe FULL Syntax Arguments Measurement Modes Example WCA230A amp WCA280A TD SCDMA Analysis Software Sets the vertical axis to the default full scale value in the spectrum view DISPlay TD_SCDMA SPECtrum Y SCALe FULL None DEMTD_SCDMA DISPlay TD_SCDMA SPECtrum Y SCALe FULL sets the vertical axis to the default full scale value in the spectrum view under the TD SCDMA standard 3 35 GPIB Commands DISPlay TD_ SCDMA SPECtrum Y SCALe OFFSet Sets or queries the minimum vertical or amplitude value bottom end in the spectrum view Syntax DISPlay TD_SCDMA SPECtrum Y SCALe OFFSet lt numeric_value gt DISP1 ay TD_SCDMA SPECtrum Y SCALe OFFSet Arguments lt numeric_value gt lt NRf gt specifies the minimum vertical value Range 200 to 100 dBm Measurement Modes DEMTD_SCDMA Example DISPlay TD SCDMA SPECtrum Y SCALe OFFSet 100dBm sets the
171. section shows the organization of the Option 28 commands in a number of functional groups For detailed information about other commands that can be used with the WCA230A or WCA280A refer to the WCA230A amp WCA280A Wireless Communication Analyzers Programmer Manual Items followed by question marks are queries items without question marks are commands Some items in this section have a question mark in parentheses in the command header section this indicates that the item can be both a command and a query You need to set the measurement mode to TD SCDMA before executing any commands for Option 28 To set the measurement mode use the command INSTrument SELect DEMTD_SCDMA NOTE For more information on SCPI commands and programming structure refer to WCA230A amp WCA280A Wireless Communication Analyzers Program mer Manual WCA230A amp WCA280A TD SCDMA Analysis Software 3 1 GPIB Commands CONFigure Commands Table 3 1 CONFigure commands Header CONFigure TD_SCDMA ACLR CONFigure TD_SCDMA CDPower CONFigure TD_SCDMA CHPower CONFigure TD_SCDMA IM CONFigure TD_SCDMA MACCuracy CONFigure TD_SCDMA OBWidth CONFigure TD_SCDMA SEMask CONFigure TD_SCDMA SFSummary CONFigure TD_SCDMA STABle CONFigure TD_SCDMA TOOMask CONFigure TD_SCDMA TSSummary DISPlay Commands Use these commands to set up the analyzer to perform the specified measure Description Sets up the analyzer to the adjacent
172. sion DISPlay TD_ SCDMA DDEMod MVlew X SCALe RANGe DISPlay TD_ SCDMA DDEMod MVlew Y SCALe FIT DISPlay TD_SCDMA DDEMod MVlew Y SCALe FULL DISPlay TD_SCDMA DDEMod MVlew Y SCALe OFFSet DISPlay TD_SCDMA DDEMod MVlew Y SCALe PDIVision DISPlay TD_ SCDMA DDEMod MVlew Y SCALe PUNit DISPlay TD_SCDMA DDEMod MVlew Y SCALe RANGe DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol STARt DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol END DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol MRPower DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol OPOWer DISPlay TD_SCDMA DDEMod MVlew ZOOM TSLot START DISPlay TD_SCDMA DDEMod SVlew subgroup DISPlay TD_ SCDMA DDEMod SVlew FORMat DISPlay TD_SCDMA DDEMod SVlew RADix DISPlay TD_ SCDMA DDEMod SVlew X SCALe OFFSet DISPlay TD_SCDMA DDEMod SVlew X SCALe PDIVision DISPlay TD_ SCDMA DDEMod SVlew X SCALe RANGe WCA230A amp WCA280A TD SCDMA Analysis Software Description Sets or queries the minimum horizontal value left end in the main view Sets or queries the horizontal or time scale per division in the mainview Sets or queries the horizontal full scale value in the main view Runs auto scale on the main view Sets the main view vertical axis to the default full scale value Sets or queries the minimum vertical value in the main view bottom end during the digital modulation related measurement Sets or queries the vertical or p
173. surement parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements Most of the modulation parameters and analysis control settings do not take effect until the next run or analysis cycle You can change the view contents in the overview subview using the VIEW DEFINE menu Press the VIEW DEFINE key to open the menu Show Views Selects the view style on the screen You can select Single or Multi Multi shows all three views and Single expands the display to only show the view currently selected Press the VIEW SELECT key to change the selected view m Overview Content The overview content display can be changed to display either the Spectrogram or Waveform power versus time WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Subview Content The subview content display can be changed to display any of the TD SCDMA demodulation measurements or the spectrum display Mainview Content The mainview content display can not be changed from timeslot summary but the mainview can be zoomed to the region tested for timeslot error Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key Scale and Format in the You can set the scale for the display using the VIEW SCALE menu Press the Mainview VIEW SCALE key to open the menu Auto Scale Amplitude Sets the start value and the scale of the vertical axis to displ
174. t Modes Example Sets or queries the level relative to the pilot which must be exceeded to identify a timeslot as active SENSe TD_SCDMA ANALysis TSLot THReshold lt numeric_value gt SENSe TD_ SCDMA ANALysis TSLot THReshold lt numeric_value gt lt NR1 gt specifies the analysis timeslot threshold in dB Range 50 dB to 50 dB DEMTD_SCDMA SENSe TD_SCDMA ANALysis TSLot THReshold 30dB sets the analysis timeslot threshold to 30 dB in the TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 71 GPIB Commands SENSe TD_SCDMA SPECtrum Subgroup The SENSe TD_SCDMA commands set up the spectrum conditions related to the TD SCDMA analysis Command Tree SENSe TD_SCDMA SPECtrum OFFSet lt numeric_value gt TINTerval SENSe TD_SCDMA SPECtrum OFFSet Sets or queries the spectrum offset within the time window in the TD SCDMA analysis Syntax SENSe TD_SCDMA SPECtrum 0FFSet lt numeric_value gt SENSe TD_SCDMA SPECtrum 0FFSet Arguments lt numeric_value gt lt NRf gt specifies the spectrum offset within the time windows Range 0 ms to 26 56 ms Measurement Modes DEMTD_SCDMA Example SENSe TD SCDMA SPECtrum OFFSet 10ms sets the spectrum offset within the time window to 10 ms in the TD SCDMA analysis SENSe TD_SCDMA SPECtrum TINTerval Queries the length of the time domain information used to construct the spectrum trace in the TD SCDMA analysis
175. t under the TD SCDMA standard NOTE There is no READ subsystem for the MACCuracy command The command SENSe TD_SCDMA IMMediate must be executed in order to retrieve the measurement results Syntax FETCh TD SCDMA MACCuracy RESult MACCuracy SCONste EVM MERRor PERRor Arguments RESult measurement result MACCuracy I Q position of each symbol SCONste Symbol constellation EVM EVM of each symbol MERRor magnitude error of each symbol PERRor phase error of each symbol Returns RESult lt Pass_Fail gt lt SEVM_Peak gt lt SEVM_Peak gt lt CEVM_Peak gt lt CEVM_RMS gt lt Crho gt lt CMerror_Peak gt lt CMerror_RMS gt lt CPerror_Peak gt lt CPerror_RMS gt lt Ferror gt lt IQ_Imbalance gt lt IQ Offset gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt SEVM_Peak gt lt NRf gt Symbol Peak EVM lt SEVM_Peak gt lt NRf gt Symbol Peak EVM lt CEVM_Peak gt lt NRf gt Composite Peak EVM lt CEVM_RMS gt lt NRf gt Composite RMS EVM lt Crho gt lt NRf gt Composite Rho lt CMerror_Peak gt lt NRf gt Composite Peak Magnitude Error lt CMerror_RMS gt lt NRf gt Composite RMS Magnitude Error lt CPerror_Peak gt lt NRf gt Composite Peak Phase Error deg lt CPerror_RMS gt lt NRf gt Composite RMS Phase Error deg lt Ferror gt lt NRf gt Frequency Error Hz lt IQ_Imbalance gt lt NRf gt IQ Imbalance dB lt
176. tation pattern None S1 S2 of the downlink pilot Multiframe Position The subframe position 1 to 4 within a multiframe DwPts RMS power The RMS power of the downlink pilot UpPts RMS power The RMS power of the uplink pilot GP RMS power The RMS power in the subframe guard period WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Modulation Accuracy Measurement Display Elements The modulation accuracy measurement measures EVM Error Vector Magni tude Rho magnitude error phase error frequency error I Q imbalance and I Q offset Figure 2 5 shows an example of the modulation accuracy measurement Tektronix W i VIEW DEFINE Frequency 1 Acquisition Length Cancel Back Span Show Views Input Att Single Multi Overview Content Waveform Subview Content Spectrum Mainview jf Content Comp Constellation Demod Frequen Timeslot TS5 DL Comp Mag Error rms peak Frequency Error 1 Q Imbal I Q Offset TD SCDMA Modulation Accuracy Condensed measurement results displayed when mainview is not selected Figure 2 5 Modulation accuracy measurement The following elements are shown in the modulation accuracy measurement display m Overview The overview display area can contain the power versus time or spectrogram measurement displays Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spec
177. tching Point lt DwPts Pattern gt lt NR1 gt DwPts Pattern lt Multiframe_Position gt lt NR1 gt Multiframe Position lt DwPts_RMS_Power gt lt NRf gt Downlink Pilot RMS Power dBm lt UpPts_RMS_Power gt lt NRf gt Uplink Pilot RMS Power dBm lt GP_RMS_Power gt lt NRf gt Gaurd Period RMS Power dBm WCA230A amp WCA280A TD SCDMA Analysis Software 3 45 GPIB Commands Measurement Modes DEMTD_SCDMA Example FETCh TD_ SCDMA SFSummary might return 0 1000 0 3 2 2 1 71901E 001 5 31588E 001 5 27454E 001 as the results of the subframe summary measurement under the TD SCDMA standard Related Commands INSTrument SELect FETCh TD_SCDMA STABle Fetches the results of the symbol table measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA STAB1e Arguments None Returns lt Num_digit gt lt Num_byte gt lt sym 1 gt lt Sym n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Sym n gt Symbol Data lt NR1 gt n MAX 704 Measurement Modes DEMTD_SCDMA Example FETCh TD_SCDMA STAB1e might return 3176xxx 176 bytes of integer data as Datal Data2 symbols for the currently selected OVSF16 code in the symbol table measurement of the TD SCDMA standard Related Commands INSTrument SELect 3 46 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands FE
178. te little endian floating point format specified IEEE 488 2 n Max 240001 DEMTC_SCDMA READ TD_SCDMA SPECtrum ACLR might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the ACLR measurement under the TD SCDMA standard INSTrument SELect READ TD_SCDMA SPECtrum CHPower Syntax Arguments Returns Measurement Modes Example 3 58 Obtains the spectrum waveform data of the channel power measurement under the TD SCDMA standard READ TD SCDMA SPECtrum CHPower None lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 DEMTC_SCDMA READ TD SCDMA SPECtrum CHPower might return 510240xxx 10240 bytes of floating point data as the spectrum WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Related Commands waveform data of the channel power measurement under the TD SCDMA standard INSTrument SELect READ TD_SCDMA SPECtrum IM Syntax Arguments Returns Measurement Modes Example Related Commands Obtains the spectrum waveform data of the intermodulation measurement under the TD SCDMA standard READ TD SCDMA SPECtrum IM N
179. the entire waveform Horizontal Scale s Sets the scale of the horizontal axis This affects both the normal and zoomed displays Horizontal Start s Sets the chip number or symbol number of the first left value of the horizontal axis Vertical Scale dB Sets the scale of the vertical axis Vertical Stop dBm Sets the maximum top value of the vertical axis Full Scale Sets all scale values to their default full scale value This affects both the normal and zoomed displays Mask Zoom Controls The zoom controls let you display a narrow region of the mask allowing you to quickly zoom in and analyze important parts of the mask Figure 2 24 shows an example of a zoomed display Zoom to Tx Mask Start Zooms in to the beginning of the mask Zoom to Tx Mask End Zooms in to the end of the mask Zoom to Max Mid Ramp Power Zooms to the part of the mask that is above the OFF power level but below the average ON power For the downlink it is near the ON to OFF transition and for the uplink it is near the OFF to ON transition Zoom to Max Tx OFF Power Zooms to the location of the maximum power of the input signal in the OFF portion of the mask Horizontal Scale s Sets the scale of the horizontal axis This affects both the zoomed and normal displays Full Scale Sets all scale values to their default full scale value This affects both the zoomed and normal displays Step Size Horizontal Start Vertical S
180. the main view displays EVM under the TD SCDMA standard DISPlay TD_SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol STARt Syntax Arguments Measurement Modes 3 22 Sets the zoom to the transmit mask start in the main view during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod MVIew FORMat is set to LPVTime DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol STARt None DEMTD_SCDMA WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Example DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol STARt Sets the zoom to the transmit mask start DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol END Syntax Arguments Measurement Modes Example Sets the zoom to the transmit mask end in the main view during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod MVIew FORMat is set to LPVTime DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol END None DEMTD_SCDMA DISPlay TD_SCDMA DDEMod MVIew ZOOM MCONtrol END Sets the zoom to the transmit mask end DISPlay TD_SCDMA DDEMod MVlew ZOOM MCONtrol MRPower Syntax Arguments Measurement Modes Example Sets the zoom to the maximum transmit mid ramp power in the main view during the digital modulation related measurement NOTE This command is only available when DISPlay TD_SCDMA DDEMod MVIew FORMat
181. tical Stop dB Sets the maximum top value of the vertical axis Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays if the Horizontal Start or Vertical Stop menu is selected Full Scale default scaling Sets all scale values to their default full scale value m Y Axis Selects whether to represent the Y axis with relative values or absolute values When you select Relative the Y axis represents the power relative to the total power of all channels When you select Absolute the Y axis represents the absolute power of each channel WCA230A amp WCA280A TD SCDMA Analysis Software 2 27 TD SCDMA Measurements CDP by Subframe Display When you select Mainview Content from the VIEW DEFINE menu and then select CDP by Subframe from the Mainview Content submenu the code domain power in a single code channel is displayed for each subframe that has been analyzed see Figure 2 13 The code domain power by subframe display shows the power in a single code channel in the selected timeslot for each subframe CDP by subframe is useful for tracking the changes in the power of an active channel over time due to power control For the number of subframes analyzed N subframe 0 is the most recent and subframe N 1 is the oldest The measured values for code domain power are described the section Code Doma
182. top Sets the step size amount per click of the general purpose knob for changes to the Horizontal Start or Vertical Stop settings The step size menu choices only display when selecting the Horizontal Start or Vertical Stop menus WCA230A amp WCA280A TD SCDMA Analysis Software 2 53 TD SCDMA Measurements is chip 1194 Figure 2 24 Zoom to Max Mid Ramp Power selected Transmit On Off Mask This section describes the measurement readouts displayed in the mainview of Measurement Readouts the transmit on off mask measurement Readout Description Tx OFF Mid Ramp Region Max Power The maximum mid ramp power in dBm within the mid ramp Chip region The chip value is the location where it occurs Tx OFF Region Max Power The maximum power in dBm within the mask region that is not Chip part of the mid ramp region The chip value is the location where it occurs 2 54 WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements Symbol Table Display The symbol table display shows the received data symbols in a code channel after descrambling and despreading Figure 2 25 shows an example of the symbol table display Tektronix WCA 280A M PAUSE Frequency Span Input Att Start 40 ms Demod Frequency Timeslot TS2 UL Subframe la 10010111 0 0 111101 00101001 01001010 01011100 10010111 00110100 11001101 00101001 01001010 01011100 10010111 00110100 Color Legend Dat 01001
183. trum display Measurement results typically associated with a measurement are not displayed when the measurement is displayed in the subview Mainview The mainview display area can contain one of the modulation accuracy related measurements along with a condensed set of numerical WCA230A amp WCA280A TD SCDMA Analysis Software 2 9 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 10 Parameters Changing the View Contents measurement results with a Pass or Fail message determined by the Limits settings for each measurement result If all measurements pass PASS is displayed at the top of the screen If any measurement fails FAIL is displayed at the top of the screen To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 10 for more information You can set timing parameters for the modulation accuracy acquisition by using the TIMING menu Press the TIMING key to open the menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements You can set the measurement parameters for the modulation accuracy measure ments by using the MEAS SETUP menu Press the MEAS SETUP key to open the menu Refer to Measurement Parameters for De
184. ts are displayed The overview content display is removed A Pass or Fail message for each measurement is displayed if limit testing is turned on in the Limits menu If all measurements pass PASS is displayed at the top of the screen If any measurement fails FAIL is displayed at the top of the screen Refer to Scale and Format in the Mainview beginning on page 2 12 for more information about the mainview content selections Menu Off Hides the side menu To display the menu again press the MENU side key or VIEW DEFINE key WCA230A amp WCA280A TD SCDMA Analysis Software 2 11 TD SCDMA Measurements Scale and Format in the This section describes the scale settings and display format in the mainview Mainview Comp Constellation Display When you select Mainview Content from the VIEW DEFINE menu and then select Comp Constellation from the Mainview Content submenu an IQ rectangular graph is displayed showing the I Q values for all chips in the current timeslot including midamble See Figure 2 6 The measured values for modulation accuracy are described the section Modulation Accuracy Measurement Readouts beginning on page 2 21 Tektronix WCA 280A Frequency Z Acquisition Length 30 08 ms Span St Input Att 20 cB a dBm Demod Frequency Timeslot TSS DL Sub Midamble EYM rms peak Comp EVM rms peak Rho Comp Mag Error rms F A peak m Chip number Comp Phase Error rms is N 1 Q
185. ts from the data currently residing in the memory without acquiring the input signal use the FETCh commands beginning on page 3 37 Command Tree READ TD_SCDMA ACLR CHPower IM OBWidth SEMask SPECtrum ACLR CHPower IM SEMask OBWidth NOTE There are no READ subsystem for CDPower MACCuracy STABle iSFSUMarry TAMPlitude TSSummary and TAMPlitude SFSummary commands These commands need to execute SENSe TD_SCDMA IMMedi ate command in order to retrieve the measurement results 3 54 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands READ TD_SCDMA ACLR Obtains the results of the adjacent channel leakage power ratio measurement under the TD SCDMA standard Syntax READ TD_ SCDMA ACLR Arguments None Returns lt Pass_fail gt lt Chpower gt or lt Pass_fail gt lt Chpower gt lt L_Acpr1 gt lt U_Acpr1 gt or lt Pass_fail gt lt Chpower gt lt L_Acpr1 gt lt U_Acpr1 gt lt L_Acpr2 gt lt U_Acpr2 gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt Chpower gt lt NRf gt is the channel power measured value in dBm lt L_Acpr1 gt lt NRf gt is the first lower adjacent channel ACPR in dBc lt U_Acpr1 gt lt NRf gt is the first upper adjacent channel ACPR in dBc lt L_Acpr2 gt lt NRf gt is the second lower adjacent channel ACPR in dBc lt U_Acpr2 gt lt NRf gt is the second upper adjace
186. ttings for the timeslot summary under the TD SCDMA standard Syntax CONFigure TD_SCDMA TSSummary Arguments None Measurement Modes DEMTD_SCDMA Example CONFigure TD_SCDMA TSSummary Sets up the analyzer to the default settings for the timeslot summary under the TD SCDMA standard Related Commands INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software 3 15 GPIB Commands DISPlay Commands The DISPlay commands control how measurement data is shown on the screen DISPlay TD_SCDMA DDEMod MVlew Subgroup The DISPlay TD_SCDMA DDEMod commands control display of the mainview for the digital modulation related measurement under TD SCDMA standard Command Tree _ DISPlay TD_SCDMA DDEMod MView FORMat RADIx 2X SCALe OFFSet PDIVision RANGe Y SCALe FIT FULL OFFSet PDIVision PUNit RANGe ZOOM MCONtrol STARt END MRPower OPOWer TSLot START MACCuracy SCONste EVM MERRor PERRor CDPower CVSFrame CVSYmbol PCGRam TPVTime LPVTime SPVTime STable BINary OCTal HEXadecimal lt numeric_value gt lt numeric_value gt lt numeric_value gt lt numeric_value gt lt numeric_value gt RELative ABSolute lt numeric_value gt lt numeric_value gt lt numeric_value gt WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Syntax Arguments Measurement Modes Example Related Commands DISPlay TD_SCDMA DDEMod
187. ue Sets or queries the minimum vertical value bottom end in the spectrum view Sets or queries the vertical or power scale in the spectrum view WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands FETCh Commands Use the FETCh commands to retrieve the measurement from the data taken by the latest INITiate command If you want to perform a FETCh operation on fresh data use the READ commands which acquire a new input signal and fetch the measurement results from that data Table 3 3 FETCh commands Header FETCh TD_SCDMA ACLR FETCh TD_SCDMA CDPower FETCh TD_SCDMA CHPower FETCh TD_SCDMA IM FETCh TD_SCDMA MACCuracy FETCh TD_SCDMA OBWidth FETCh TD_SCDMA SEMask FETCh TD_SCDMA SFSummary FETCh TD_SCDMA STABle FETCh TD_SCDMA TOOMask FETCh TD_SCDMA TSSummary FETCh TD_SCDMA SPECtrum ACLR FETCh TD_SCDMA SPECtrum CHPower FETCh TD_SCDMA SPECtrum IM FETCh TD_SCDMA SPECtrum OBWidth FETCh TD_SCDMA SPECtrum SEMask FETCh TD_SCDMA TAMPlitude SFSummary FETCh TD_SCDMA TAMPlitude TOOMask FETCh TD_SCDMA TAMPlitude TSSummary WCA230A amp WCA280A TD SCDMA Analysis Software Description Returns the adjacent channel leakage power ratio measurement results Returns the code domain power measurement results Returns the channel power measurement results Returns the intermodulation measurement results Returns the modulation ac
188. ulation measurement parameter settings Parameter Analyze Analysis Control Demod Frequency Offset Hz Active Channel Threshold dB Time Reference DwPts Trigger Freq amp Phase Reference Midamble DwPts 2 62 Description Performs analysis for the time slots in the analysis range The acquisition must be paused and an acquisition record must be present before an analysis can be made NOTE Most analysis control changes do not take effect until the next Run cycle or analysis cycle Specifies the location of the carrier signal to be analyzed relative to the center frequency This value is used as a starting point for the demodulation analysis Sets the active channel threshold level in dB from the pilot used for deciding whether a code channel is active or inactive You can set the value from 50 dB to 50 dB Sets the downlink pilot as the time reference for each subframe This setting should only be used when the downlink pilot is present in the signal under test Selects the external trigger input connector as the source for the timing reference An external subframe trigger signal must be supplied to mark the beginning of the subframe The trigger source setting in the Trigger menu should be set to External The trigger time reference is useful if the signal under test does not contain a downlink pilot or if the signal level is very low Selects the detected midamble of each timeslot as the frequency an
189. ull Scale default scaling Sets all scale values to their default full scale value Step Size Horizontal Start Vertical Stop Sets the step size of the up and down keys when changing the Horizontal Start or Vertical Stop settings A step size menu only displays if the Horizontal Start or Vertical Stop menu is selected Y Axis Selects whether to represent the Y axis with relative values or absolute values When you select Relative the Y axis represents the power relative to the total power of all channels When you select Absolute the Y axis represents the absolute power of each channel WCA230A amp WCA280A TD SCDMA Analysis Software TD SCDMA Measurements CDP Codogram Display When you select Mainview Content from the VIEW DEFINE menu and then select CDP Codogram from the Mainview Content submenu the code domain power is displayed as a codogram see Figure 2 15 The codogram displays the code domain power for all codes in the selected timeslot over all analyzed subframes The power in each code is represented by a color with red indicating the highest power and blue representing the lowest power The codes for a single subframe are displayed on the horizontal axis with the vertical axis representing the subframe indices The CDP codogram provides an overview of the selected timeslot over time allowing the user to quickly see changes in the code domain due to spreading factor changes calls coming and going and power co
190. upper gt Where lt Pass_fail gt 1 0 is the measurement result 1 Pass or 0 Fail lt L_channel gt lt NRf gt is the lower channel measured value in dBm lt U_channel gt lt NRf gt is the upper channel measured value in dBm lt L3_lower gt lt NRf gt is the lower third order lower measured value in dBc lt L3_upper gt lt NRf gt is the lower third order upper measured value in dBc lt U3_lower gt lt NRf gt is the upper third order lower measured value in dBc lt U3_upper gt lt NRf gt is the upper third order upper measured value in dBc lt L5_lower gt lt NRf gt is the lower fifth order lower measured value in dBc lt LS_upper gt lt NRf gt is the lower fifth order upper measured value in dBc lt U5_lower gt lt NRf gt is the upper fifth order lower measured value in dBc lt US_upper gt lt NRf gt is the upper fifth order upper measured value in dBc When each value is not present the value of 1000 is returned Measurement Modes DEMTD_SCDMA Example FETCh TD_SCDMA IM might return 1 2 061E 001 5 501E 001 1 66E 001 1 78E 001 4 76E 001 1 32E 001 4 73E 001 1 29E 001 5 1E 001 1 66E 001 for the intermodulation measurement under the TD SCDMA standard Related Commands INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software 3 41 GPIB Commands FETCh TD_SCDMA MACCuracy Returns the results of the modulation accuracy measuremen
191. x 25600 bytes of floating point data as time domain amplitude data of the transmit on off mask measurement of the TD SCDMA standard FETCh TD_SCDMA TAMPlitude TSSummary Syntax Arguments 3 52 Fetches the results of the time domain amplitude data of the timeslot summary measurement under the TD SCDMA standard NOTE There is no READ subsystem for the TAMPlitude commands FETCh TD_SCDMA TAMP1i tude TSSummary None WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Returns lt Num_digit gt lt Num_byte gt lt Datal 1 gt lt Datal 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follows lt Data n gt is the absolute power for each symbol in dBm 4 Four byte little endian floating point format specified IEEE 488 2 n Max 864 Invalid data is returned as 1000 Measurement Modes DEMTD_SCDMA Example FETCh TD_ SCDMA TAMP1i tude TSSummary might return 43456xxx 3456 bytes of floating point data as time domain amplitude data of the timeslot summary measurement of the TD SCDMA standard Related Commands INSTrument SELect WCA230A amp WCA280A TD SCDMA Analysis Software 3 53 GPIB Commands READ Commands The READ commands acquire an input signal once in the single mode and obtain the measurement results from the data If you want to fetch the measurement resul
192. xceeds Selects the fail mode to detect fail conditions between the measure ment results and the test limits The choices are m Absolute Fail is detected when one of the absolute measurement results is larger than the limit for Beginning Absolute Limit and or Ending Absolute Limit m Relative Fail is detected when one of the relative measurement results is larger than the limit for Beginning Relative Limit and or Ending Relative Limit m Rel OR Abs Fail is detected when one of the absolute measurement results is larger than the limit for Beginning Absolute Limit and Ending Absolute Limit OR one of the relative measurement results is larger than the limit for Beginning Relative Limit and Ending Relative Limit m Rel AND Abs Fail is detected when one of the absolute measurement results is larger than the limit for Beginning Absolute Limit and Ending Absolute Limit AND one of the relative measurement results is larger than the limit for Beginning Relative Limit and Ending Relative Limit Beginning Absolute Limit Sets an absolute level limit at Beginning Frequency 200 dBm to 200 dBm Ending Absolute Limit Sets an absolute level limit at Ending Frequency 200 dBm to 200 dBm Beginning Relative Limit Sets a relative level limit at Beginning Frequency 200 dBm to 200 dBc Ending Relative Limit Sets a relative level limit at Ending Frequency 200 dBm to 200 dBc 1 2 70 The Offset from Carrier limit is only available for the
193. xxx 10240 bytes of floating point data as the spectrum waveform data of the ACLR measurement under the TD SCDMA standard Related Commands INSTrument SELect FETCh TD_SCDMA SPECtrum CHPower Fetches the spectrum waveform data of the channel power measurement under the TD SCDMA standard Syntax FETCh TD_ SCDMA SPECtrum CHPower Arguments None 3 48 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands Returns lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number of bytes of the data that follow lt Data n gt is the spectrum amplitude in dBm Four byte little endian floating point format specified IEEE 488 2 n Max 240001 Measurement Modes DEMTC_SCDMA Example FETCh TD_ SCDMA SPECtrum CHPower might return 510240xxx 10240 bytes of floating point data as the spectrum waveform data of the channel power measurement under the TD SCDMA standard Related Commands INSTrument SELect FETCh TD_SCDMA SPECtrum IM Fetches the spectrum waveform data of the intermodulation measurement under the TD SCDMA standard Syntax FETCh TD_SCDMA SPECtrum IM Arguments None Returns lt Num_digit gt lt Num_byte gt lt Data 1 gt lt Data 2 gt lt Data n gt Where lt Num_digit gt is the number of digits in lt Num_byte gt lt Num_byte gt is the number o
194. y Elements The following information is shown in the timeslot summary measurement display WCA230A amp WCA280A TD SCDMA Analysis Software 2 47 TD SCDMA Measurements Setting the Timing Parameters Setting the Measurement 2 48 Parameters Changing the View Contents m Overview The overview display area can contain the power versus time or spectrogram measurement displays m Subview The subview display area can contain any of the TD SCDMA demodulation measurements or the spectrum display m Mainview The mainview display area is fixed to display only the timeslot summary measurement To change the contents in each of the views use the VIEW DEFINE menu Refer to Changing the View Contents on page 2 48 for more information You can set timing parameters for the timeslot summary acquisition by using the TIMING menu Press the TIMING key to open the menu Refer to Timing Parameters for Demodulation Measurements beginning on page 2 61 for a description of the timing parameter settings NOTE The timing parameters for demodulation measurements are global settings for all TD SCDMA demodulation measurements You can set the measurement parameters for the timeslot summary measurement by using the MEAS SETUP menu Press the MEAS SETUP key to open the MEAS SETUP menu Refer to Measurement Parameters for Demodulation Measurements beginning on page 2 62 for a description of the measurement parameters NOTE The mea
195. y TD_SCDMA DDEMod MVIew X SCALe RANGe 512 sets the full scale value of the horizontal axis to 512 chips when the main view displays EVM under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew Y SCALe FIT Runs auto scale on the main view during the digital modulation related measurement The auto scale automatically sets the start value and scale of the vertical axis so that the whole waveform is displayed on the screen Syntax DISPlay TD_SCDMA DDEMod MVIew Y SCALe FIT Arguments None Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod MVIew Y SCALe FIT runs auto scale on the main view under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew Y SCALe FULL Sets the vertical axis in the main view to the default full scale value during the digital modulation related measurement Syntax DISPlay TD_SCDMA DDEMod MVIew Y SCALe FULL Arguments None Measurement Modes DEMTD_SCDMA Example DISPlay TD_SCDMA DDEMod MVIew Y SCALe FULL sets the main view s vertical axis to the default full scale value under the TD SCDMA standard Related Commands DISPlay TD_SCDMA DDEMod MVIew FORMat DISPlay TD_SCDMA DDEMod MVlew Y SCALe OFFSet Sets or queries the minimum vertical value in the main view bottom end during the digital modulation related measurement Syntax DISPlay TD_SCDMA DDEMod
196. ysis Syntax SENSe TD_SCDMA STABle TPCSs COUNt ONE D16Sfactor SENSe TD_SCDMA STABle TPCSs COUNt Arguments The arguments and descriptions are listed below Argument Description ONE The symbols in the Data2 burst will be decided as if only one TPC and SS symbol are present D16Sfactor The number of symbols for each TPC and SS segment is assumed to be 16 divided by the spreading factor Measurement Modes DEMTD_SCDMA Example SENSe TD_SCDMA STABle TPCSs COUNt ONE sets the symbol count in the data2 burst to one for both TPC and SS symbols in TD SCDMA analysis 3 86 WCA230A amp WCA280A TD SCDMA Analysis Software GPIB Commands SENSe TD_SCDMA STABle TPCSs SELect Syntax Arguments Measurement Modes Example Sets or queries whether to enable or disable the TPC and SS in the Data2 burst in the TD SCDMA analysis SENSe TD_SCDMA STABle TPCSs SELect lt boolean gt SENSe TD SCDMA STABle TPCSs SELect lt boolean gt ON OFF 1 0 ON or 1 enables that both TPC and SS symbols can be found in the Data2 burst OFF or 0 disables that all Data2 burst symbols are data only DEMTD_SCDMA SENSe TD_SCDMA STABle TPCSs SELect ON enables that both TPC and SS symbols can be found in the Data2 burst in TD SCDMA analysis WCA230A amp WCA280A TD SCDMA Analysis Software 3 87 GPIB Commands SENSe TD_SCDMA IM Subgroup The SENSe TD_SCDMA IM commands set up the conditions related to the int

WCA230A & WCA280A Option 28 TD-SCDMA - TRS

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WCA230A & WCA280A Option 28 TD-SCDMA - TRS