Agilent Technologies ESA-E Series Programmer's Manual page 208

Language Reference
FETCh Subsystem
FETCh Subsystem
FETCh subsystem commands apply only to measurements found in th e
MEASURE
menu. FETCh commands can only be used as queries .
FETCh commands put valid data into the output buffer, but do not
initiate data acquisition . Use the : INITiate [ : IMMediate] command
to acquire data. You can only fetch results from the measurement that
is selected, and when current measurement results are valid .
: FETCh <meas>? will return valid data only when the measurement i s
in one of the following states :
idl e
initiate d
paused
Return Main, Lower, and Upper Channel Power
FETCh :ACPower ?
This command returns scalar results of main channel power, lowe r
channel power (relative), and upper channel power (relative) .
Remarks: The main channel power is returned in the curren t
amplitude units, and the lower and upper channe l
results are always returned in dB . The results ar e
returned in a comma-separated list .
Return Main Channel Powe r
FETCh :ACPower :MAIN ?
This command returns the value of main channel power in the curren t
amplitude units.
Front Panel
Access : MEASURE, AC P
Return Lower Channel Powe r
FETCh :ACPower :LOWer ?
This command returns the value of the lower channel power relative t o
the main channel power, in dB .