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Last updated: October 28, 2004
This section provides an example of how to make a waveform quality measurement via GPIB.
The following program example assumes that the mobile station's antenna output is connected to the RF IN/OUT connector, and the mobile station has found service.
The basic procedure to measure waveform quality is as follows:
10 RE-SAVE "c:\roadhog\programs\wqu.txt" 20 !This program measures waveform quality 30 !Refer to "Waveform Quality and Frequency Accuracy" in EIA/TIA-IS-98D for standards and specifications 40 CLEAR SCREEN 50 A=714 60 !***Specify call parameters*** 70 Systype$="DIGITAL2000" !Cell System Type 80 Band$="USCELLULAR" !Cell band 90 Channel=384 !RF Channel 100 Sid=1 !System Identification 110 Nid=1 !Network Identification 120 Radio_config$="F3R3" !Radio Configuration 130 Service_opt$="SO2" !Loopback service option 140 ! 150 !***Specify test parameters*** 160 Loss_frequency$="851 MHZ,896 MHZ" !Reverse channel, forward channel frequencies for amplitude offset (path loss) 170 Expected_loss$="-2,-2" !Path loss at reverse channel, forward channel frequencies 180 Ior=-50!Cell power 190 Pilot=-7 !Pilot channel power level 200 Traffic=-7.4 !Traffic channel power level 210 ! 220 ON TIMEOUT 7,20 CALL Timeout ! Calls "Timeout" routine 230 OUTPUT A;"SETUP:WQU:TIMEOUT:STIME 10 S" !Sets waveform quality measurement timeout to 10 seconds 240 OUTPUT A;"SYST:COMM:GPIB:DEB:STAT ON"!Turns debug state on 250 ! 260 !***Set up call parameters*** 270 OUTPUT A;"CALL:OPER:MODE CALL" !Sets Operating Mode to Active Cell 280 OUTPUT A;"CALL:SYSTEM ";Systype$ !Sets System Type 290 OUTPUT A;"CALL:BAND ";Band$ !Sets Cell Band for selected System Type 300 OUTPUT A;"CALL:CHAN ";Channel !Sets RF Channel for selected System Type and Cell Band 310 OUTPUT A;"CALL:POW -35" !Sets and turns on Cell Power 320 OUTPUT A;"CALL:SID ";Sid! Sets System Identification 330 OUTPUT A;"CALL:NID ";Nid! Sets Network Identification 340 OUTPUT A;"CALL:RCON ";Radio_config$!Sets Radio configuration 350 OUTPUT A;"CALL:SOPTION ";Service_opt$ !Sets service option for selected System Type and Radio Configuration 360 OUTPUT A;"CALL:PROT PREV6" !Sets Protocol Revision for the selected System Type 370 OUTPUT A;"CALL:PAG:DRAT FULL" !Sets Paging data rate to full rate 380 OUTPUT A;"CALL:PIL -7" !Sets pilot to default 390 OUTPUT A;"CALL:SYNC -16" !Sets sync to default 400 OUTPUT A;"CALL:PAG -12" !Sets paging to default 410 OUTPUT A;"CALL:FCH -15.6" !Sets traffic to default 420 ! 430 PRINT "Turn on mobile station...press continue when it has found service and registered" 440 PAUSE 450 CLEAR SCREEN 460 OUTPUT A;"CALL:REGISTER:TIMER:STATE OFF" !Turns off timer-based registrations 470 WAIT 2 ! Waits for any timer-based registrations to clear out 480 ! 490 !***Page the mobile station*** 500 DISP "Paging mobile station..." 510 OUTPUT A;"CALL:ORIG" !Pages the mobile station520 OUTPUT A;"CALL:CONNECTED:STATE?" !Queries for connected/idle state...hangs until state change detector is disarmed 530 ENTER A;Call_connected 540 IF NOT Call_connected THEN 550 DISP "Call attempt failed" 560 STOP 570 ELSE 580 DISP "Call connected" 590 END IF 600 ! 610 !***Set up measurement parameters*** 620 OUTPUT A;"SETUP:WQUALITY:CONTINUOUS OFF" !Sets trigger arm state to single 630 OUTPUT A;"CALL:POW ";Ior !Sets Cell Power for the selected System Type 640 OUTPUT A;"CALL:CLPCONTROL:REVERSE:MODE ALT" !Alternating up/down power control bits 650 OUTPUT A;"CALL:PIL ";Pilot !Sets Pilot channel level 660 OUTPUT A;"CALL:FCH ";Traffic !Sets Fundamental (Traffic) channel level 661 OUTPUT A;"SETUP:WQUALITY:CDPOWER:IQINactive:LIMIT -23" 670 ! 680 !***Obtain and display waveform quality measurement results*** 690 WAIT 1 700 OUTPUT A;"INITIATE:WQUALITY" !Initiates a Waveform Quality measurement 760 OUTPUT A;"FETCh:WQUALITY?" !Queries the test set for waveform quality measurement results 770 ENTER A;Integrity,Rho,Freq_error,Time_error,Carr_feed,Phase_err,Mag_err,Evm 780 PRINT "Integrity indicator = ";Integrity 790 PRINT "Rho = ";Rho,"Frequency error = ";Freq_error,"Time error = ";Time_error,"Carrier feedthrough = ";Carr_feed 800 PRINT "Phase error = ";Phase_err,"Magnitude error = ";Mag_err,"Error vector magnitude = ";Evm 801 ! 802 !***Obtain and display code domain power pass/fail measurement results*** 803 OUTPUT A;"FETCh:WQUality:CDPower:IQINactive?" 804 ENTER A;Iq_passfail 805 SELECT Iq_passfail 806 CASE 0 807 PRINT "Code domain power passed" 808 CASE 1 809 PRINT "Code domain power failed" 811 END SELECT 813 !***Obtain and display code domain power measurement results (I-channel)*** 814 DIM Ichannel$[1000] 815 OUTPUT A;"FETCh:WQUALITY:CDPower:ICH?" 816 ENTER A;Ichannel$ 830 INTEGER I,Comma,Nextcomma !I represents the 16 bins, Comma is the current substring position 840 Comma=1 !Initialize Comma to the first character of the Ichannel$ ascii character string 860 PRINT "I-Channel active/inactive = ";Ichannel$[Comma;16] 870 Comma=Comma+17 890 PRINT "I-channel bin 0 walsh channel number = ";Ichannel$[Comma;16] 891 Comma=Comma+17 900 PRINT "I-channel bin 0 spread factor = ";Ichannel$[Comma;16] 905 Comma=Comma+17 910 PRINT "I-channel bin 0 power level = ";Ichannel$[Comma;16] 920 DISP "Test complete" 930 ! 940 !***Return to default call processing settings*** 950 OUTPUT A;"CALL:CLPCONTROL:REVERSE:MODE ACTIVE" !Return to active power control bits 960 OUTPUT A;"CALL:POW:DIG2000 -50" ! Returns cell power to -50 dBm/1.23 MHz 970 OUTPUT A;"CALL:END" 980 END 990 Timeout: SUB Timeout ! Global timeout handler (from Step 1) 1000 PRINT "Program timed out" 1010 CLEAR 7 1020 CLEAR 714 1030 SUBEND
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Waveform Quality/Code Domain Measurement Description
Measuring Waveform Quality/Code Domain Power
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