<WCDMA Inner Loop Power Control tests, test pattern E&F,G&H using ARB files on the R&S CMW 500>
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1 <WCDMA Inner Loop Power Control tests, test pattern E&F,G&H using ARB files on the R&S CMW 500> Application Note Products: R&S CMW500 R&S CMW- KW400 <Application Note> <Thomas Lutz> < CM78>-<version 0.1>
2 Table of Contents Table of Contents 1 Test Equipment Setup R&S CMW500 WCDMA Arbitrary Waveform Playback Setup Step 1 Enable the General Purpose RF Generator Step 2 Configure the General Purpose RF Generator Step 3 Select the ARB File Step 4 Turn ON the General Purpose RF Generator Table of the General Purpose RF Generator Settings Rohde & Schwarz WCDMA Non-signaling test arbitrary waveform configuration Rohde & Schwarz WinIQSIM2 control sequence Reset the tool Defining a TPC pattern with 120 zeros and 120 ones Defining a the data list directory and write the TPC pattern to a file e:\\120zeros120ones.dm_iqd Defining the scrambling code Primary CPICH definition Secondary CPICH definition (inactive) Primary SCH definition Secondary SCH definition Primary CCPCH definition Secondary CCPCH definition (inactive) PICH definition AICH definition (inactive) AP_AICH definition (inactive) PDSCH definition (inactive) Downlink DPCCH definition (inactive) DPCH definition Definition of all other channels (12 to 137) Marker definition ARB Length Query for the relative total power Query for channel conflicts, syntax errors in the remote sequence Creation of the arbitrary waveform file...13 using ARB files on the R&S CMW 500> 2
3 Table of Contents R&S CMW500 Configuration for GPRF Power Uplink Signal Measurement Measurement Settings RF Settings Measurement Control Repetition Display Marker Start the Measurement Automating a GPRF Power Measurement with the R&S CMW Configure the arbitrary signal generator to play the waveform Configure the R&S CMW500 analyzer to make a GPRF power measurement Arm the measurement Get the power measurement results Test Equipment Setup for ILPC test pattern tests G&H R&S CMW500 Configuration for GPRF Power Uplink Signal Measurement Automating a GPRF Power Measurement with the R&S CMW Configure the arbitrary signal generator to play the waveform Configure the R&S CMW500 analyzer to make a GPRF power measurement Arm the measurement Get the power measurement results Summary References using ARB files on the R&S CMW 500> 3
4 1 Test Equipment Setup 1.1 R&S CMW500 WCDMA Arbitrary Waveform Playback Setup The following details how to configure the R&S CMW500 General Purpose RF Generator for playback of an arbitrary waveform used for WCDMA inner loop power control tests, test pattern E & F. The waveform to execute playback on is: D:\Rohde-Schwarz\CMW\Data\waveform\RMC12_2_IlpcEF_0_9_16.wv To start this arbitrary waveform file a software option KW400 on the R&S CMW500 is required Step 1 Enable the General Purpose RF Generator Step 2 Configure the General Purpose RF Generator using ARB files on the R&S CMW 500> 4
5 1.1.3 Step 3 Select the ARB File To select the arbitrary waveform, press the ARB soft key on left side of R&S CMW screen, followed by the Select ARB File soft key on the bottom using ARB files on the R&S CMW 500> 5
6 Navigate through the pop up dialog, e.g. rotating the spin wheel and select the desired arbitrary waveform file by pushing the spin wheel. Navigate the focus of the dialog to the OK button by rotating the spin wheel again. After selecting the OK button push the spin wheel again Step 4 Turn ON the General Purpose RF Generator To begin playing the arbitrary waveform, press the On/Off hard key button on the R&S CMW500 front panel, located along the top of the instrument, above the spin wheel. using ARB files on the R&S CMW 500> 6
7 1.1.5 Table of the General Purpose RF Generator Settings General Purpose RF Generator RF Configuration Parameter Settings Units RF Routing User defined (suggest RF1 COM) External Attenuation User defined (RF cable path loss) db Frequency MHz Level (RMS) dbm Digital Gain 0.0 db List Mode Baseband Configuration Baseband Mode Dual Tone ARB Configuration Repetition ARB File Name Trigger Retrigger Autostart Source List Configuration List Elements Off ARB Not applicable Continuous D:\Rohde-Schwarz\CMW\Data\waveform\ RMC12_2_IlpcEF_0_9_16.wv Checked Checked Not applicable Not applicable Rohde & Schwarz WCDMA Non-signaling test arbitrary waveform configuration The waveform described below is useful for testing WCDMA chipsets in non-signaling test mode using the Rohde & Schwarz CMW500 Wideband Radio Communication Tester. The signal provides everything needed in a downlink signal for a non-signaling test mode enabled device to synchronize and decode on downlink channel The signal can be used to perform inner loop power control tests for the test pattern E&F in one row. The same arbitrary waveform file can be used for the test pattern G&H. The necessary changes in the analyzer settings are described in the next chapter. Changing the ARB file will cause the mobile to loose the synchronization. To using ARB files on the R&S CMW 500> 7
8 prevent this, a multi-segment ARB generator mode is available on the R&S CMW500. Uplink signal measurements from the chip can be performed using the R&S CMW500 GPRF power measurement, which is part of the base instrument. Waveform file name: RMC12_2_IlpcEF_0_9_16.wv Waveform Content 160 millisecond long waveform (16 frames) DL Primary Scrambling Code 0 DL Secondary Scrambling Code 0 DPCH Channel Code 9 Channel type 12.2kbps RMC Power Control Bits set 120 times to 0 and 120 times to 1 P-CPICH Level -3.3 db P-SCH Level -8.3 db S-SCH Level -8.3 db P-CCPCH Level 5.3 db PICH Level -8.3 db DPCH Level db Rohde & Schwarz WinIQSIM2 control sequence The Rohde & Schwarz tool WinIQSIM2 can also be remote controlled to define the parameters, which are used to generate the arbitrary waveform file. The remote interface behaves like a standard remote interface of a signal generator based on a SCPI syntax using an VISA driver to control a TCP/IP connection to localhost. The leading WinIQSIM: is not part of the command, this is only used as a address symbol in this Rohde & Schwarz remote script tools Reset the tool buffout = [ ] WINIQSIM2: *IDN? WINIQSIM2: *RST WINIQSIM2: *CLS WINIQSIM2: BB:W3GP:STAT OFF using ARB files on the R&S CMW 500> 8
9 Defining a TPC pattern with 120 zeros and 120 ones ilpc_tpc_pattern = "0" for index in range (0,119): ilpc_tpc_pattern = ilpc_tpc_pattern + ',0' for index in range (120,240): ilpc_tpc_pattern = ilpc_tpc_pattern + ',1' Defining a the data list directory and write the TPC pattern to a file e:\\120zeros120ones.dm_iqd WINIQSIM2: MMEM:CDIR 'e:\\' WINIQSIM2: MMEM:MDIR 'e:\\' WINIQSIM2: SOUR:BB:DM:DLIS:SEL "e:\\120zeros120ones" buffout = "SOUR:BB:DM:DLIS:DATA " + ilpc_tpc_pattern WINIQSIM2.write(buffout) Defining the scrambling code The primary scrambling code is defined with 4 digits followed by the secondary scrambling code with 1 digit WINIQSIM2.write('BB:W3GP:BST1:SCOD #H0000') WINIQSIM2: BB:W3GP:BST1:SCOD:STAT ON Primary CPICH definition WINIQSIM2: BB:W3GP:BST1:CHAN0:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN0:POW Secondary CPICH definition (inactive) WINIQSIM2: BB:W3GP:BST1:CHAN1:STAT OFF WINIQSIM2: BB:W3GP:BST1:CHAN1:POW -3.3 WINIQSIM2: BB:W3GP:BST1:CHAN1:CCOD 7 using ARB files on the R&S CMW 500> 9
10 Primary SCH definition WINIQSIM2: BB:W3GP:BST1:CHAN2:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN2:POW Secondary SCH definition WINIQSIM2: BB:W3GP:BST1:CHAN3:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN3:POW Primary CCPCH definition WINIQSIM2: BB:W3GP:BST1:CHAN4:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN4:POW -5.3 WINIQSIM2: BB:W3GP:BST1:CHAN4:CCOD 1 WINIQSIM2: BB:W3GP:BST1:CHAN4:DATA PN9 WINIQSIM2: BB:W3GP:BST:ENH:PCCP:CCOD:STAT ON WINIQSIM2: BB:W3GP:BST:ENH:PCCP:STAT ON Secondary CCPCH definition (inactive) WINIQSIM2: BB:W3GP:BST1:CHAN5:STAT OFF WINIQSIM2: BB:W3GP:BST1:CHAN5:POW -5.3 WINIQSIM2: BB:W3GP:BST1:CHAN5:CCOD 4 WINIQSIM2: BB:W3GP:BST1:CHAN5:DATA PN9 WINIQSIM2: BB:W3GP:BST1:CHAN5:SFOR 4 WINIQSIM2: BB:W3GP:BST1:CHAN5:TOFF PICH definition WINIQSIM2: BB:W3GP:BST1:CHAN6:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN6:POW -8.3 WINIQSIM2: BB:W3GP:BST1:CHAN6:CCOD 16 WINIQSIM2: BB:W3GP:BST1:CHAN6:DATA PN9 WINIQSIM2: BB:W3GP:BST1:CHAN6:TOFF AICH definition (inactive) using ARB files on the R&S CMW 500> 10
11 WINIQSIM2: BB:W3GP:BST1:CHAN7:STAT OFF WINIQSIM2: BB:W3GP:BST1:CHAN7:POW -8.3 WINIQSIM2: BB:W3GP:BST1:CHAN7:CCOD AP_AICH definition (inactive) WINIQSIM2: BB:W3GP:BST1:CHAN8:STAT OFF PDSCH definition (inactive) WINIQSIM2: BB:W3GP:BST1:CHAN9:STAT OFF Downlink DPCCH definition (inactive) WINIQSIM2: BB:W3GP:BST1:CHAN10:STAT OFF DPCH definition The code channel is 9. It is using armc12.2 coded channel with transport format combination index 3. The data source is a PRBS-9 sequence. ILPC defined by data list e:\\120zeros120ones.dm_iqd WINIQSIM2: BB:W3GP:BST1:CHAN11:STAT ON WINIQSIM2: BB:W3GP:BST1:CHAN11:POW WINIQSIM2: BB:W3GP:BST1:CHAN11:CCOD 9 WINIQSIM2: BB:W3GP:BST1:CHAN11:DATA PN9 WINIQSIM2: BB:W3GP:BST1:CHAN11:TOFF 0 WINIQSIM2: BB:W3GP:BST:ENH:CHAN11:DPCH:CCOD:TYPE M12K2 WINIQSIM2: BB:W3GP:BST:ENH:CHAN11:DPCH:CCOD:STAT ON WINIQSIM2: BB:W3GP:BST:ENH:CHAN11:DPCH:STAT ON WINIQSIM2: BB:W3GP:BST:ENH:CHAN11:DPCH:TCH1:DATA PN9 WINIQSIM2: BB:W3GP:BST1:CHAN11:DPCC:TFCI 3 WINIQSIM2: BB:W3GP:BST1:CHAN11:DPCC:TFCI:STATE ON WINIQSIM2: BB:W3GP:BST1:CHAN11:DPCC:TPC:DATA DLIS WINIQSIM2: BB:W3GP:BST1:CHAN11:DPCC:TPC:DATA:DSEL "e:\\120zeros120ones" WINIQSIM2: BB:W3GP:BST1:CHAN11:DPCC:TPC:READ CONT using ARB files on the R&S CMW 500> 11
12 Definition of all other channels (12 to 137) for index in range (12, 138): buffout = "BB:W3GP:BST1:CHAN" + str(index) + ":STAT OFF" WINIQSIM2.write(buffout) buffout = "BB:W3GP:BST1:CHAN" + str(index) + ":POW 0.0" WINIQSIM2.write(buffout) buffout = "BB:W3GP:BST1:CHAN" + str(index) + ":TOFF 0" WINIQSIM2.write(buffout) Marker definition 1 = ARB length 2 = ARB length 3 = Slot 4 = Frame WINIQSIM2: SOUR:BB:W3GP:TRIG:OUTP1:MODE CSP WINIQSIM2: SOUR:BB:W3GP:TRIG:OUTP2:MODE CSP WINIQSIM2: SOUR:BB:W3GP:TRIG:OUTP3:MODE SLOT WINIQSIM2: SOUR:BB:W3GP:TRIG:OUTP4:MODE RFR ARB Length Defined with number of frames WINIQSIM2: BB:W3GP:SLEN 16 WINIQSIM2: BB:W3GP:STAT ON;*OPC? Query for the relative total power WINIQSIM2: BB:W3GP:POW? Query for channel conflicts, syntax errors in the remote sequence WINIQSIM2: BB:W3GP:BST1:DCON? WINIQSIM2: SYST:ERR? using ARB files on the R&S CMW 500> 12
13 Creation of the arbitrary waveform file WINIQSIM2: SOUR:BB:W3GP:WAV:CRE " e:\rmc12_2_ilpcef_0_9_16.wv " WINIQSIM2: SYST:ERR? R&S CMW500 Configuration for GPRF Power Uplink Signal Measurement The following describes how to configure the R&S CMW500 to perform a measurement on the uplink WCDMA transmitter. First, enable the GPRF TX Measurement option on, by checking its enable radio button from the Measurement Controller sub panel. This menu can be found by pressing the Measure hard key found along the top of the R&S CMW500 front panel, above the number keypad. using ARB files on the R&S CMW 500> 13
14 1.1.9 Measurement Settings Next find and press the following soft key on from the GPRF Power Measurement screen. If this soft key is not yet visible, use the Tasks hard key. The Tasks hard key shows the available currently enabled (loaded) software features and to select this feature. Press the soft key GPRF Power The displayed soft keys row along the bottom of the LCD display should change to one of the GPRF Power Measurement controls like shown below RF Settings The total configuration consists of four different parts: Trigger configuration List mode configuration Filter configuration Measurement control. Start by pressing the Config on the right side of the displayed soft keys row along the bottom of the LCD display. Please define the trigger settings in this shown pop up menu now. Additionally configure the Start index (0) and the Stop Index (239) of the list mode and activate the list mode. using ARB files on the R&S CMW 500> 14
15 Press the Config button again to return to the main window. In the second step press the List Config. Button on the right side of the displayed soft keys row along the bottom of the LCD display. Start to fill out the pop up dialog like shown below and afterwards press the button Apply. Enter the Start Index (0) and the Index Range (28), followed by the Frequency and the Level. The frequency increment and the level increment should both be 0.0 You need to modify now the index range and the level setting. After that use again the button Apply using ARB files on the R&S CMW 500> 15
16 This step is now repeated several times, like shown. using ARB files on the R&S CMW 500> 16
17 With this last entry you should enter again the index range and the level. After that press again the button Apply, like before. using ARB files on the R&S CMW 500> 17
18 Return to the main screen by the button Cancel now. In this main window, the filter configuration and the step configuration can be done. Use the spin wheel to change from edit field to next edit field. The trigger offset microseconds belongs to the 1024 chips offset between downlink and the uplink signal plus 25 microseconds guard period. using ARB files on the R&S CMW 500> 18
19 The following table summarizes how to configure the following parameters to these values: GPRF Power Measurements RF Configuration Parameter Settings Units RF Routing User defined (suggest RF1 COM) External Attenuation User defined (RF cable path loss) db Frequency Defined by the list mode configuration MHz Expected Power Level (RMS) Defined by the list mode configuration dbm User Margin 6.0 db List Mode Trigger Trigger Source On GPRF Generator : Restart Marker' Trigger Timeout 1000 (default) msec. Trigger Offset 291,66 µsec. Trigger Mode Statistic Counts Trigger once for single shot measurements or Retrigger sweep for single shot and continuous mode Power 1 Slot List Configuration List Elements 240 Start index 0 Stop index 239 Frequency MHz Expected Power (index 0 to 27) 24.0 dbm Expected Power (index 28 to 50) -1.0 dbm Expected Power (index 51 to 68) dbm Expected Power (index 69 to 138) dbm Expected Power (index 139 to 153) dbm Expected Power (index 154 to 165) 0.0 dbm Expected Power (index 166 to 174) 10.0 dbm Expected Power (index 175 to 239) 24.0 dbm using ARB files on the R&S CMW 500> 19
20 GPRF Power Measurements Filter Configuration Parameter Settings Units Bandwidth 5.0 or 10.0 MHz Filter Type Step Configuration Bandpass Step Length (1 slot) µsec. Measurement Length µsec. The R&S CMW500 LCD screen should look like the following: The display range of the Y-axis can be optimized by pressing the following soft key on the right-hand column of the LCD screen Configure the range by pressing the softkey Y Scale Power and the shown popup dialog. using ARB files on the R&S CMW 500> 20
21 Similar like the Y-Axis also the X-Axis of Diagram can be changed by pressing the soft key X Scale and changing the parameter of the pop up dialog Measurement Control The big benefit in combining the test steps E&F in the inner loop power control measurement is, that the measurements starts and stops at exactly the same condition with maximum power. That gives additionally the possibility to perform the measurement also in a continuous mode Find and press the following soft key on the right-hand column of the LCD screen Repetition Set the repetition mode to Continuous It is possible to analyze the standard deviation of the power results for each TX power step. Press the following soft key on the right-hand column of the LCD screen using ARB files on the R&S CMW 500> 21
22 Display Look for the softkey Standard Dev, which toggles between the state Show and Hide Press the following soft key on the right-hand column of the LCD screen Marker In addition press the soft key Marker and change this value e.g. by rotating the spin wheel of the R&S CMW500. using ARB files on the R&S CMW 500> 22
23 The fields above the Marker pop up dialog show the power results at this marker position Start the Measurement The measurement can be manually executed (triggered) by pressing the ON/OFF hard key on the front panel of the R&S CMW500, located along the top of the instrument, above the spin wheel Automating a GPRF Power Measurement with the R&S CMW500 The following SCPI command code is an example of how to configure the R&S CMW500 signal generator and signal analyzer to perform a non-signaling WCDMA uplink TX measurement on non signaling enabled WCDMA chipset. The leading CMW: is not part of the command, this is only used as a address symbol in Rohde & Schwarz remote script tools. using ARB files on the R&S CMW 500> 23
24 Configure the arbitrary signal generator to play the waveform Whenever loading an ARB file, you should ensure it was present on the selected path. The verification can be achieved by querying the currently loaded ARB file. A return string "No File Selected" would be an indication, that the file is not present. CMW: ROUT:GPRF:GEN1:RFS:CONN RF1C CMW: SOUR:GPRF:GEN1:BBM ARB CMW: SOUR:GPRF:GEN1:RFS:FREQ e6 CMW: SOUR:GPRF:GEN1:RFS:EATT 1 CMW: SOUR:GPRF:GEN1:RFS:LEV -65 CMW: SOUR:GPRF:GEN1:ARB:FILE 'd:\\ :\\Rohde-Schwarz\\CMW\\data\\waveform\\RMC12_2_IlpcEF_0_9_16.wv' CMW: SOUR:GPRF:GEN1:ARB:FILE? CMW: SOUR:GPRF:GEN1:ARB:REP CONT CMW: TRIG:GPRF:GEN1:ARB:RETR ON CMW: TRIG:GPRF:GEN1:ARB:AUT ON CMW: SOUR:GPRF:GEN1:LIST OFF CMW: SYST:ERR? CMW: SOUR:GPRF:GEN1:STAT ON;*OPC? Configure the R&S CMW500 analyzer to make a GPRF power measurement Slot timing and filter configuration, user margin corresponding to the crest factor of the signal CMW: CONF:GPRF:MEAS:RFS:ENP 24 CMW: CONF:GPRF:MEAS:RFS:UMAR 6 CMW: CONF:GPRF:MEAS:POW:SLEN E-6 CMW: CONF:GPRF:MEAS:POW:MLEN E-6 CMW: CONF:GPRF:MEAS:POW:SCO 1 CMW: CONF:GPRF:MEAS:POW:FILT:TYPE BAND CMW: CONF:GPRF:MEAS:POW:FILT:BAND:BWID 10E6 Trigger timing defined by generator marker. The trigger mode could also be trigger once instead of retrigger sweep, but the retrigger sweep mode also works in continuous mode CMW: TRIG:GPRF:MEAS:POW:SOUR "GPRF Gen1: Restart Marker" CMW: TRIG:GPRF:MEAS:POW:MODE SWE CMW: CONF:GPRF:MEAS:POW:TRIG:OFFS E-6 CMW: CONF:GPRF:MEAS:POW:TRIG:TOUT 300 CMW: CONF:GPRF:MEAS:POW:LIST ON List mode uses 240 entries for the same frequency buffout = "CONF:GPRF:MEAS:POW:LIST:FREQ:ALL E9" for index in range (1,240): buffout = buffout + ",1.9224E9" CMW.write(buffout) List mode uses 240 entries for the expected power using ARB files on the R&S CMW 500> 24
25 buffout = "CONF:GPRF:MEAS:POW:LIST:ENP:ALL 24.0" for index in range (1,28): buffout = buffout + ",24.0" for index in range (0,23): buffout = buffout + ",-1.0" for index in range (0,18): buffout = buffout + ",-21.0" for index in range (0,70): buffout = buffout + ",-30.0" for index in range (0,15): buffout = buffout + ",-13.0" for index in range (0,12): buffout = buffout + ",0.0" for index in range (0,9): buffout = buffout + ",10.0" for index in range (0,65): buffout = buffout + ",24.0" CMW.write(buffout) CMW: CONF:GPRF:MEAS:POW:LIST:STAR 0;STOP Arm the measurement CMW: INIT:GPRF:MEAS:POW;*OPC? Get the power measurement results CMW: FETC:GPRF:MEAS:POW:CURR? 1.2 Test Equipment Setup for ILPC test pattern tests G&H The same arbitrary waveform file as it was used for inner loop power control test pattern E&F can also be used for the test pattern G and H: D:\Rohde-Schwarz\CMW\Data\waveform\RMC12_2_IlpcEF_0_9_16.wv The differences in this test pattern G&H are the use of power steps of 2 db instead of 1dB in the test pattern E&F. This requires a modification of the expected power settings in the general purpose RF power test ( GPRF power ). The rest of the handling is exactly the same, so that only the analyzer configuration is described in this chapter. using ARB files on the R&S CMW 500> 25
26 1.2.1 R&S CMW500 Configuration for GPRF Power Uplink Signal Measurement Most Settings of the General Purpose Power Measurement (GPRF Power) are the same as described for the Inner Loop Power Control Tests with Test Pattern E&F. Only the expected power measurement of the list mode need to be modified, which is described here. Start to fill out the pop up dialog like shown below and afterwards press the button Apply. Enter the Start Index (0) and the Index Range (14), followed by the Frequency and the Level. The frequency increment and the level increment should both be 0.0. You need to modify now the index range and the level setting. After that use again the button Apply This step is now repeated several times, like shown. using ARB files on the R&S CMW 500> 26
27 using ARB files on the R&S CMW 500> 27
28 With this last entry you should enter again the index range and the level. After that press again the button Apply, like before. Return to the main screen by the button Cancel now. The following screen shots summarizes how to configure the following parameters to these values: using ARB files on the R&S CMW 500> 28
29 GPRF Power Measurements RF Configuration Parameter Settings Units RF Routing User defined (suggest RF1 COM) External Attenuation User defined (RF cable path loss) db Frequency Defined by the list mode configuration MHz Expected Power Level (RMS) Defined by the list mode configuration dbm User Margin 6.0 db List Mode Trigger Trigger Source On GPRF Generator : Restart Marker' Trigger Timeout 1000 (default) msec. Trigger Offset 291,66 µsec. Trigger Mode Statistic Counts Trigger once for single shot measurements or Retrigger sweep for single shot and continuous mode Power 1 Slot List Configuration List Elements 240 Start index 0 Stop index 239 Frequency MHz Expected Power (index 0 to 13) 24.0 dbm Expected Power (index 14 to 24) -1.0 dbm Expected Power (index 25 to 33) dbm Expected Power (index 34 to 128) dbm Expected Power (index 129 to 135) dbm Expected Power (index 136 to 141) 0.0 dbm Expected Power (index 142 to 145) 10.0 dbm Expected Power (index 146 to 239) 24.0 dbm using ARB files on the R&S CMW 500> 29
30 GPRF Power Measurements Filter Configuration Parameter Settings Units Bandwidth 5.0 or 10.0 MHz Filter Type Step Configuration Bandpass Step Length (1 slot) µsec. Measurement Length µsec Automating a GPRF Power Measurement with the R&S CMW500 The following SCPI command code is an example of how to configure the R&S CMW500 signal generator and signal analyzer to perform a non-signaling WCDMA uplink TX measurement on non signaling enabled WCDMA chipset. The leading CMW: is not part of the command, this is only used as a address symbol in Rohde & Schwarz remote script tools Configure the arbitrary signal generator to play the waveform Whenever loading an ARB file, you should ensure it was present on the selected path. The verification can be achieved by querying the currently loaded ARB file. A return string "No File Selected" would be an indication, that the file is not present. CMW: ROUT:GPRF:GEN1:RFS:CONN RF1C CMW: SOUR:GPRF:GEN1:BBM ARB CMW: SOUR:GPRF:GEN1:RFS:FREQ e6 CMW: SOUR:GPRF:GEN1:RFS:EATT 1 CMW: SOUR:GPRF:GEN1:RFS:LEV -65 CMW: SOUR:GPRF:GEN1:ARB:FILE 'd:\\ :\\Rohde-Schwarz\\CMW\\data\\waveform\\RMC12_2_IlpcEF_0_9_16.wv' CMW: SOUR:GPRF:GEN1:ARB:FILE? CMW: SOUR:GPRF:GEN1:ARB:REP CONT CMW: TRIG:GPRF:GEN1:ARB:RETR ON CMW: TRIG:GPRF:GEN1:ARB:AUT ON CMW: SOUR:GPRF:GEN1:LIST OFF CMW: SYST:ERR? CMW: SOUR:GPRF:GEN1:STAT ON;*OPC? Configure the R&S CMW500 analyzer to make a GPRF power measurement Slot timing and filter configuration, user margin corresponding to the crest factor of the signal using ARB files on the R&S CMW 500> 30
31 CMW: CONF:GPRF:MEAS:RFS:ENP 24 CMW: CONF:GPRF:MEAS:RFS:UMAR 6 CMW: CONF:GPRF:MEAS:POW:SLEN E-6 CMW: CONF:GPRF:MEAS:POW:MLEN E-6 CMW: CONF:GPRF:MEAS:POW:SCO 1 CMW: CONF:GPRF:MEAS:POW:FILT:TYPE BAND CMW: CONF:GPRF:MEAS:POW:FILT:BAND:BWID 10E6 Trigger timing defined by generator marker. The trigger mode could also be trigger once instead of retrigger sweep, but the retrigger sweep mode also works in continuous mode CMW: TRIG:GPRF:MEAS:POW:SOUR "GPRF Gen1: Restart Marker" CMW: TRIG:GPRF:MEAS:POW:MODE SWE CMW: CONF:GPRF:MEAS:POW:TRIG:OFFS E-6 CMW: CONF:GPRF:MEAS:POW:TRIG:TOUT 300 CMW: CONF:GPRF:MEAS:POW:LIST ON List mode uses 240 entries for the same frequency buffout = "CONF:GPRF:MEAS:POW:LIST:FREQ:ALL E9" for index in range (1,240): buffout = buffout + ",1.9224E9" CMW.write(buffout) List mode uses 240 entries for the expected power buffout = "CONF:GPRF:MEAS:POW:LIST:ENP:ALL 24.0" for index in range (1,14): buffout = buffout + ",24.0" for index in range (0,11): buffout = buffout + ",-1.0" for index in range (0,9): buffout = buffout + ",-21.0" for index in range (0,95): buffout = buffout + ",-30.0" for index in range (0,7): buffout = buffout + ",-13.0" for index in range (0,6): buffout = buffout + ",0.0" for index in range (0,4): buffout = buffout + ",10.0" for index in range (0,94): buffout = buffout + ",24.0" CMW: CONF:GPRF:MEAS:POW:LIST:STAR 0;STOP Arm the measurement CMW: INIT:GPRF:MEAS:POW;*OPC? using ARB files on the R&S CMW 500> 31
32 Summary Get the power measurement results CMW: FETC:GPRF:MEAS:POW:CURR? 2 Summary The application note explains how to create and use an arbitrary waveform file to perform WCDMA inner loop power control tests, test pattern E&F and G&H for a nonsignaling test mode enabled device. 3 References [1] User manual of the R&S CMW 500 or R&S CMW 280 radio communication tester. [2] Software manual for the R&S WinIQSim Simulation Software [3] Software manual for the R&S WinIQSim Options xxx-k42/ -K242/ -K43/ - K243/ -K45/ -K245/ -K59/ -K259/ -KW401/ -KW402 3GPP FDD, HSDPA, HSUPA and HSP Index A Arm the GPRF Power Measurement... 25,31 Automating a GPRF Power Measurement... 23,30 C Configure the ARB generator... 24,30 Configure the GPRF Generator... 4 Configure the GPRF power measurement... 24,30 E Enable the GPRF Generator... 4 G Get the GPRF power measurement results... 25,32 M Measurement Settings...14 R RF Settings of the GPRF Power Measurement...14 S Select the ARB File...5 Start the GPRF Power Measurement...23 T Table of the GPRF Generator Settings...7 Turn On the GPRF Generator...6,8 W WCDMA Uplink Measurements for test pattern E&F...13 WCDMA Uplink Measurements for test pattern G&H...26 Measurement Control using ARB files on the R&S CMW 500> 32
33 About Rohde & Schwarz Rohde & Schwarz is an independent group of companies specializing in electronics. It is a leading supplier of solutions in the fields of test and measurement, broadcasting, radiomonitoring and radiolocation, as well as secure communications. Established 75 years ago, Rohde & Schwarz has a global presence and a dedicated service network in over 70 countries. Company headquarters are in Munich, Germany. Environmental commitment Energy-efficient products Continuous improvement in environmental sustainability ISO certified environmental management system Regional contact USA & Canada USA: TEST-RSA ( ) from outside USA: CustomerSupport@rohde-schwarz.com East Asia CustomerSupport@rohde-schwarz.com Rest of the World CustomerSupport@rohde-schwarz.com This application note and the supplied programs may only be used subject to the conditions of use set forth in the download area of the Rohde & Schwarz website. R&S is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners. Rohde & Schwarz GmbH & Co. KG Mühldorfstraße 15 D München Phone Fax
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