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Last updated: October 28, 2004
This section provides an example of how to make a TROLP (test standard TIA/EIA-IS-98D Time Response of Open Loop Power Control) measurement via the GPIB.
The following program example assumes that a mobile station's antenna output is connected to the RF IN/OUT connector, and that the mobile station call parameters are specified in the first section of code.
The basic procedure to test TROLP is as follows:
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10 RE-SAVE "c:\roadhog\programs\trolp.txt" 20 !This program measures time response to open loop power control 30 !See "Time Response of Open Loop Power Control" in TIA/EIA-98-D for specifications 40 CLEAR SCREEN 50 A=714 60 !***Specify call parameters*** 70 Systype$="DIGITAL2000" !Cell System Type 80 Band$="USC" !Frequency Band 90 Channel=384 !RF Channel 100 Sid=1 !System Identification 110 Nid=1 !Network Identification 120 Radio_config$="F3R3" !This example will test radio configuration 3 only 130 Service_opt$="SO2" !Service Option 150 ! 160 !***Specify test parameters*** 170 Loss_frequency$="1900 MHZ,1945 MHZ" !frequencies for amplitude offset (path loss) 180 Expected_loss$="-10,-10" !Path loss at reverse channel, forward channel frequencies 190 Ior=-60 !Starting cell power for TROLP testing 200 Pilot=-7 !Pilot channel power level for TROLP testing 210 Traffic=-7.4 !Traffic channel power level for TROLP testing 220 ! 230 ! 240 ON TIMEOUT 7,20 CALL Timeout ! Calls "Timeout" routine 250 OUTPUT A;"SETUP:TROP:TIMEOUT:STIME 10 S" !Sets TROLP measurement timeout to 10 seconds 260 OUTPUT A;"SYST:COMM:GPIB:DEB:STAT ON" !Turns debug state on 270 ! 280 !***Set up path loss*** 290 OUTPUT A;"SYSTEM:CORRECTION:SFREQUENCY ";Loss_frequency$ ! Amplitude Offset table 300 OUTPUT A;"SYSTEM:CORRECTION:SGAIN ";Expected_loss$ ! Amplitude Offset table 310 ! 320 !***Set up call parameters*** 330 OUTPUT A;"CALL:OPER:MODE CALL" !Sets Operating Mode to Active Cell 340 OUTPUT A;"CALL:SYSTEM ";Systype$ !Sets System Type 350 OUTPUT A;"CALL:BAND ";Band$ !Sets Cell Band for selected System Type 360 OUTPUT A;"CALL:CHAN ";Channel ! Sets Channel for selected System Type and Cell Band 370 OUTPUT A;"CALL:POWER -50" !Sets and turns on Cell Power for call setup 380 OUTPUT A;"CALL:SID ";Sid! Sets System Identification 390 OUTPUT A;"CALL:NID ";Nid! Sets Network Identification 400 OUTPUT A;"CALL:RCON ";Radio_config$ !Sets Radio Configuration 410 OUTPUT A;"CALL:SOPTION ";Service_opt$ !service option for System Type and Radio Config 420 OUTPUT A;"CALL:PROT PREV6" !Sets Protocol Revision for the selected System Type 430 OUTPUT A;"CALL:PAG:DRAT FULL" !Sets Paging channel data rate to full rate 450 OUTPUT A;"CALL:PIL -7" !Sets Pilot to default 460 OUTPUT A;"CALL:SYNC -16" !Sets Sync to default 470 OUTPUT A;"CALL:PAG -12" !Sets Paging to default 480 OUTPUT A;"CALL:FCH -15.6" !Sets Traffic to default 490 ! 500 PRINT "Turn on mobile station...press continue when it has found service and registered" 510 PAUSE 520 CLEAR SCREEN 530 OUTPUT A;"CALL:REG:TIMER:STATE OFF" !Turns timer-based registrations off 540 WAIT 2 !Waits 2 seconds for any timer-based registrations to clear out 550 ! 560 !***Page the mobile station*** 570 DISP "Paging mobile station..." 580 OUTPUT A;"CALL:ORIG" !Pages the mobile station 590 OUTPUT A;"CALL:CONNECTED:STATE?" !Queries for connected/idle state 600 ENTER A;Call_connected 610 IF NOT Call_connected THEN 620 DISP "Call attempt failed" 630 STOP 640 ELSE 650 DISP "Call connected" 660 END IF 670 ! 680 !***Set up measurement parameters*** 681 OUTPUT A;"CALL:POW ";Ior ! Sets Cell Power for TROLP measurement 682 OUTPUT A;"CALL:PIL ";Pilot !Sets Pilot channel level 683 OUTPUT A;"CALL:FCH ";Traffic !Sets Traffic channel level 684 ! 685 GOSUB Start_meas_down !Steps Ior down 20 dB 686 GOSUB Start_meas_up !Steps Ior up 20 dB 687 GOSUB Start_meas_up !Steps Ior up 20 dB 688 GOSUB Start_meas_down !Steps Ior down 20 dB 689 GOTO End_program 691 Start_meas_down: ! Subroutine to measure -20 dB step in cell power 692 !***Obtain pass/fail measurement results for 20 dB step down in cell power*** 693 OUTPUT A;"SETUP:TROP:STEP DOWN20" 694 OUTPUT A;"INITIATE:TROP" !Initiates a time response of open loop power control 695 DISP "Measuring mobile station response to open loop power control" 696 OUTPUT A;"FETCh:TROP?" !Queries the test set for TROLP measurement results 697 DISP "Time response of open loop power control measurement completed" 698 ENTER A;Integrity,Passfail 699 SELECT Passfail !Assign pass/fail results to a string 700 CASE 0 701 Pass_fail$="PASSED" 702 CASE 1 703 Pass_fail$="FAILED" 704 END SELECT 705 PRINT "Integrity indicator = ";Integrity 706 PRINT "+20 dB step results = ";Pass_fail$ 707 RETURN 709 ! 710 Start_meas_up: ! Subroutine to measure +20 dB step in cell power 890 !***Obtain pass/fail measurement results for 20 dB step up in cell power*** 891 OUTPUT A;"SETUP:TROP:STEP UP20" 892 OUTPUT A;"INITIATE:TROP" !Initiates a time response of open loop power control 893 DISP "Measuring mobile station response to open loop power control" 894 OUTPUT A;"FETCh:TROP?" !Queries the test set for TROLP measurement results 895 DISP "Time response to open loop power control measurement completed" 896 ENTER A;Integrity,Passfail 897 SELECT Passfail !Assign pass/fail results to a string 898 CASE 0 899 Pass_fail$="PASSED" 900 CASE 1 901 Pass_fail$="FAILED" 902 END SELECT 903 PRINT "Integrity indicator = ";Integrity 904 PRINT "-20 dB step results = ";Pass_fail$ 905 RETURN 907 ! 917 End_program: ! 990 OUTPUT A;"CALL:END" !Ends the call 1000 END 1010 Timeout: SUB Timeout ! Global timeout handler 1020 PRINT "Program timed out" 1030 CLEAR 7 1040 CLEAR 714 1050 SUBEND
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Time Response of Open Loop Power Control (TROLPC) Measurement Description
Measuring Time Response of Open Loop Power Control (TROLPC)
Time Response of Open Loop Power Control (TROLPC) Troubleshooting
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