Program Examples
Publication 21555, Rev. E, September 2002 A-17
A.4.6 Reading Power Measurements Example 6
FETCh? allows finer control of the meter’s measurement sequences. The low level control function of
FETCh#? is to first, process the measurement channel information based upon sensor data and
configuration settings and then, place the result in the meter data output buffer to be read by the slot0
controller/resource manager.
The following program uses the INIT command to control acceptance of measurement values in
conjunction with the FETCh? command. When using FETCh#?, both trigger sequence arming and
triggering/data acquisition must be controlled in the program. This is juxtaposed with MEAS#? and
READ#? which, being higher level commands, include these functions.
This program will allow the fastest measurement speed performance in NORMal mode.
280 ASSIGN @Pwr_mtr to 70101
290 CLEAR @Pwr_mtr
300 WAIT 1
310 OUTPUT @Pwr_mtr;CALC1:MODE NORM! Can ONLY send Configuration Commands in Normal Mode!!
320 OUTPUT @Pwr_mtr;TRIG:SOUR IMM ! Power Meter controls triggering with TRIG or *TRG
330 OUTPUT @Pwr_mtr;INIT:CONT ON ! Power Meter controls instrument trigger arming
340 !
350 OUTPUT @Pwr_mtr;SENS2:AVER:COUN 1 ! Sets averaging to manual and one sample per reading.
360 OUTPUT @Pwr_mtr;CALC1:POW 2 ! Channel 1 configured to measure sensor 2 power
370 !
380 OUTPUT @Pwr_mtr;SENS2:CORR:FREQ 17.4E9
! Applies Cal Factor for 17.4 GHz to data.
390 !
400 FOR I=1 TO 10
430 OUTPUT @Pwr_mtr;FETC1? ! Measures Power at sensor.
440 ENTER @Pwr_mtr;Rdg
450 PRINT Rdg
460 NEXT I
470 !
670 END
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