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Last updated: October 28, 2004
This section provides an example of how to make transmitter spurious emissions measurements 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 spurious emissions remotely is:
10 RE-SAVE "c:\roadhog\programs\tx_spurious.txt" 20 !This program measures conducted spurious emissions from the mobile station 30 !See "Conducted Spurious Emissions" in TIA/EIA-98-D for specifications and standards 40 CLEAR SCREEN 50 A=714 60 !***Specify call parameters*** 70 Systype$="DIGITAL2000" 80 Band$="USCELLULAR" 90 Channel=384 100 Sid=1 110 Nid=1 120 Radio_config$="F3R3" !The test standard requires measurements at each radio config 130 Service_opt$="SO2" 140 ! 150 !***Specify test parameters*** 160 Loss_frequency$="836 MHZ,881 MHZ" 170 Expected_loss$="-2,-2" 180 Nom_pwr=7 190 Init_pwr=15 200 Acc_prb_steps=7 210 Num_step=7 220 Max_rsp_seq=15 230 Acc_prb_size=4 240 Ior=-90 250 Pilot=-7.4 260 Paging_ch=-12 270 Sync=-16 280 Traffic=-15.5 290 ! 300 ON TIMEOUT 7,20 CALL Timeout 310 OUTPUT A;"SETUP:CTXSpurious:TIMEOUT:STIME 3 S" 320 OUTPUT A;"SYST:COMM:GPIB:DEB:STAT ON" 330 ! 340 !***Set up path loss*** 350 OUTPUT A;"SYSTEM:CORRECTION:SFREQUENCY ";Loss_frequency$ 360 OUTPUT A;"SYSTEM:CORRECTION:SGAIN ";Expected_loss$ 370 ! 380 !***Set up access/paging parameters*** 390 OUTPUT A;"CALL:OPER:MODE CALL" 400 OUTPUT A;"CALL:BAND ";Band$ 410 OUTPUT A;"CALL:CHAN ";Channel 420 OUTPUT A;"CALL:POW -50" 430 OUTPUT A;"CALL:SID ";Sid 440 OUTPUT A;"CALL:NID ";Nid 450 OUTPUT A;"CALL:RCON ";Radio_config$ 460 OUTPUT A;"CALL:SOPTION ";Service_opt$ 470 OUTPUT A;"CALL:PROT PREV6" 480 OUTPUT A;"CALL:PAG ";Paging_ch 490 OUTPUT A;"CALL:PAG:DRAT FULL" 500 OUTPUT A;"CALL:PIL ";Pilot 510 OUTPUT A;"CALL:SYNC ";Sync 520 OUTPUT A;"CALL:FCH ";Traffic 530 ! 540 PRINT "Turn on mobile station...press continue when it has found service and registered" 550 PAUSE 560 CLEAR SCREEN 570 OUTPUT A;"CALL:REGISTER:TIMER:STATE OFF" 580 WAIT 2 590 ! 600 !***Set up measurement parameters*** 610 OUTPUT A;"SETUP:CTXSpurious:CONTINUOUS OFF" 620 OUTPUT A;"CALL:APAR:POW:NOM ";Nom_pwr 630 OUTPUT A;"CALL:APAR:POW:INIT ";Init_pwr 640 OUTPUT A;"CALL:APARAMETER:POWER:STEP ";Acc_prb_size 650 OUTPUT A;"CALL:APAR:POW:STEP:COUNT ";Num_step 660 OUTPUT A;"CALL:APARAMETER:POWER:STEP:COUNT ";Acc_prb_steps 670 OUTPUT A;"CALL:APAR:SEQ:RESP:MAX ";Max_rsp_seq 680 ! 690 !***Make a call*** 700 DISP "Paging mobile station..." 710 OUTPUT A;"CALL:ORIG" 720 OUTPUT A;"CALL:CONNECTED:STATE?" 730 ENTER A;Call_connected 740 IF NOT Call_connected THEN 750 DISP "Call attempt failed" 760 STOP 770 ELSE 780 DISP "Call connected" 790 END IF 800 ! 810 !***Send all up power control bits*** 820 OUTPUT A;"CALL:CLPC:REVERSE:MODE UP" 821 ! 830 DISP "Measuring Tx Spurious Emissions" 840 ! 850 !***Obtain measurement results*** 860 OUTPUT A;"INITIATE:CTXSpurious" 870 OUTPUT A;"FETCH:CTXSpurious?" 880 ENTER A;Integ,Passfail,Lower_adj,Upper_adj,Lower_alt,Upper_alt 890 PRINT "Integrity indicator = ";Integ 900 IF Passfail THEN 910 PRINT "Test failed" 920 ELSE 930 PRINT "Test passed" 940 END IF 960 PRINT "Lower adjacent channel power = ";Lower_adj 970 PRINT "Upper adjacent channel power = ";Upper_adj 980 PRINT "Lower alternate power = ";Lower_adj 990 PRINT "Upper alternate power = ";Upper_adj 1000 DISP "Test complete" 1010 ! 1020 !***Return to default call processing states*** 1030 OUTPUT A;"CALL:CLPC:REVERSE:MODE ACTIVE" !Returns to active power control bits 1040 OUTPUT A;"CALL:END" 1050 OUTPUT A;"CALL:REGISTER:TIMER:STATE ON" 1060 END 1070 ! 1080 Timeout: SUB Timeout 1090 PRINT "Program timed out" 1100 CLEAR 7 1110 CLEAR 714 1120 SUBEND
This query returns an integrity indicator followed by a channel power measurement result (if results are available).
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Tx Spurious Emissions Measurement Description
Measuring TX Spurious Emissions
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