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 slot 0
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
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CLEAR @Pwr_mtr
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WAIT 1
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OUTPUT @Pwr_mtr;CALC1:MODE NORM! Can ONLY send Configuration Commands in Normal Mode!!
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OUTPUT @Pwr_mtr;TRIG:SOUR IMM
! Power Meter controls triggering with TRIG or *TRG
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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
!
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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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