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Last updated: October 28, 2004
This section provides an example of how to make a code channel time/phase 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:
10 RE-SAVE "c:\roadhog\programs\code_chan.txt" 20 !This program measures handoff waveform quality 30 !Refer to "Reverse Pilot Channel to Code Channel Time Tolerance" and 40 !"Reverse Pilot Channel to Code Channel Time Tolerance" for standards and specifications 50 CLEAR SCREEN 60 A=714 70 !***Specify call parameters*** 80 Systype$="DIGITAL2000" !Cell System Type must be DIGITAL2000 90 Band$="USCELLULAR" !Cell band 100 Channel=384 !RF Channel 110 Sid=1 !System Identification 120 Nid=1 !Network Identification 130 Radio_config$="F3R3" !for code channel time/phase error, radio configuration must be F3R3, F4R3, or F5R4 140 ! 150 !***Specify test parameters*** 160 Loss_frequency$="851 MHZ,896 MHZ" !Reverse channel, forward channel frequencies for amplitude offset (path loss) 170 Expected_loss$="-2,-2" !Path loss at reverse channel, forward channel frequencies 180 ! 190 ON TIMEOUT 7,20 CALL Timeout ! Calls "Timeout" routine 200 OUTPUT A;"SETUP:CCTPhase:TIMEOUT:STIME 10 S" !Sets waveform quality measurement timeout to 10 seconds 210 OUTPUT A;"SYST:COMM:GPIB:DEB:STAT ON"!Turns debug state on 220 ! 230 !***Set up call parameters*** 240 OUTPUT A;"CALL:OPER:MODE CALL" !Sets Operating Mode to Active Cell 250 OUTPUT A;"CALL:SYSTEM ";Systype$ !Sets System Type 260 OUTPUT A;"CALL:BAND ";Band$ !Sets Cell Band for selected System Type 270 OUTPUT A;"CALL:CHAN ";Channel !Sets RF Channel for selected System Type and Cell Band 280 OUTPUT A;"CALL:POW -50" !Sets and turns on Cell Power 290 OUTPUT A;"CALL:SID ";Sid! Sets System Identification 300 OUTPUT A;"CALL:NID ";Nid! Sets Network Identification 310 OUTPUT A;"CALL:RCON ";Radio_config$!Sets Radio configuration 320 OUTPUT A;"CALL:PROT PREV6" !Sets Protocol Revision for the selected System Type 330 ! 340 PRINT "Turn on mobile station...press continue when it has found service and registered" 350 PAUSE 360 CLEAR SCREEN 370 OUTPUT A;"CALL:REGISTER:TIMER:STATE OFF" !Turns off timer-based registrations 380 WAIT 2 ! Waits for any timer-based registrations to clear out 390 ! 400 !***Page the mobile station*** 410 DISP "Paging mobile station..." 430 OUTPUT A;"CALL:ORIG" !Pages the mobile station 440 OUTPUT A;"CALL:CONNECTED:STATE?" !Queries for connected/idle state...hangs until state change detector is disarmed 450 ENTER A;Call_connected 460 IF NOT Call_connected THEN 470 DISP "Call attempt failed" 480 STOP 490 ELSE 500 DISP "Call connected" 510 END IF 520 ! 530 !***Set up measurement parameters*** 540 OUTPUT A;"SETUP:CCTPhase:CONTINUOUS OFF" !Sets trigger arm state to single 550 OUTPUT A;"SETUP:CCTPhase:TERROR:LIMit 10ns" !Sets the time error pass/fail limit to 10 ns 560 OUTPUT A;"SETUP:CCTPhase:PERRor:LIMit 0.15rad" !Sets the phase error pass/fail limit to 0.15 radians 570 ! 580 !***Obtain and display code channel time/phase pass/fail results*** 590 WAIT 1 600 OUTPUT A;"INITIATE:CCTPhase" !Initiates a code channel time/phase error measurement 610 OUTPUT A;"FETCh:CCTPhase?" !Queries the test set for waveform quality measurement results 620 ENTER A;Integrity,Time_err,Phase_err 630 PRINT "Integrity indicator = ";Integrity 640 IF Time_err THEN 650 PRINT "Time error test failed" 660 ELSE 670 PRINT "Time error test passed" 680 END IF 690 IF Phase_err THEN 700 PRINT "Phase error test failed" 710 ELSE 720 PRINT "Phase error test passed" 730 END IF 740 ! 750 DISP "Test complete" 760 ! 770 !***Return to idle call processing state*** 780 OUTPUT A;"CALL:END" 790 END 800 Timeout: SUB Timeout ! Global timeout handler (from Step 1) 810 PRINT "Program timed out" 820 CLEAR 7 830 CLEAR 714 840 SUBEND
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Code Channel Time/Phase Error Measurement Description
Measuring Code Channel Time/Phase Error
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