HP 8920B - Page 619

619
Chapter 8, Programming The Call Processing Subsystem
Programming The ANALOG MEAS Screen
200 SUB Meas_hum_noise
210 OUTPUT 714;"DISP CME"
220 OUTPUT 714;"AFG1:DEST ’AUDIO OUT’;FREQ 1KHZ;OUTP:INCR .01V"
230 OUTPUT 714;"AFG1:OUTP 50 MV"
240 OUTPUT 714;"AFAN:INP ’FM DEMOD’;DEMP ’750 US’;DET ’PK+’"
250 OUTPUT 714;"AFAN:FILT1 ’C MESSAGE’;FILT2 ’>99KHZ LP’"
260 OUTPUT 714;"MEAS:AFR:SEL ’AF FREQ’"
270 OUTPUT 714;"RFG:AMPL -47DBM"
280 OUTPUT 714;"TRIG:MODE:RETR SINGLE;SETT FULL"
290 REPEAT
300 OUTPUT 714;"TRIG;:MEAS:AFR:FM?"
310 ENTER 714;Deviation
320 IF Deviation>8300 THEN OUTPUT 714;"AFG1:OUTPut:INCR DOWN"
330 IF Deviation<7700 THEN OUTPUT 714;"AFG1:OUTPut:INCR UP"
340 UNTIL Deviation>=7700 AND Deviation<=8300
350 OUTPUT 714;"AFAN:DET ’RMS’"
360 OUTPUT 714;"TRIG;:MEAS:AFR:FM?"
370 ENTER 714;Deviation
380 OUTPUT 714;"MEAS:AFR:FM:REF:STAT ON;VAL
"&VAL$(Deviation)&"HZ"
390 OUTPUT 714;"AFG1:OUTPut:STAT OFF"
400 OUTPUT 714;"TRIG;:MEAS:AFR:FM?"
410 ENTER 714;Deviation
420 PRINT USING "K,3D.2D,K";"FM Hum and Noise = ";Deviation;" dB."
430 OUTPUT 714;"TRIG:MODE:RETR REP;SETT FULL"
440 OUTPUT 714;"MEAS:AFR:FM:REF:STAT OFF"
450 SUBEND