Agilent Technologies 75000 Series C - Manual (Page 61)

Test 2-7: Frequency Accuracy (cont’d)
Example Program (cont’d)
250 !---------- Set up AFG ----------
260 OUTPUT @Afg;"*RST"
!Reset AFG
270 WAIT .5
280 !
290 !---------- Perform test ----------
300 FOR I=1 TO 5
310 PRINT "Expected reading =";Freq(I)
320 PRINT
330 IF I=1 THEN
340 OUTPUT @Afg;"ROSC:SOUR INT1"
!ROSC = INT1
350 OUTPUT @Afg;"MARK:FEED ""ROSC""" !Marker source = ROSC
360 ELSE
370 OUTPUT @Afg;"ABORT"
!Abort waveform
380 OUTPUT @Afg;"ROSC:SOUR INT2" !ROSC = INT2
390 IF Freq(I)=4.0E+7 THEN
400 OUTPUT @Afg;"MARK:FEED ""ROSC"""
!Marker source = ROSC
410 ELSE
420 OUTPUT @Afg;":FUNC SQU;";
!Squarewave
430 !
440 !Square wave freq is 1/4 of marker freq
450 OUTPUT @Afg;":FREQ2 "&VAL$(Freq(I)/4)&";";
460 OUTPUT @Afg;":TRIG:STAR:SOUR INT2"!TRIG source = INT2
470 OUTPUT @Afg;"MARK:FEED ""TRIG"""
!Marker source = TRIG
480 END IF
490 END IF
500 !
510 OUTPUT @Afg;"INIT:IMM"
!Initiate
520 WAIT 1
530 !
540 DISP "Record the Counter reading, then press ’Continue’"
550 PAUSE
560 DISP
570 NEXT I
580 !
590 OUTPUT @Afg;"*RST;*CLS"
!Reset AFG
600 END
Agilent E1445A Service Manual Verification Tests 59