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8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
4
Measurement Operations & Settings
command:
:FETCh[
n
][:CHANnel[
m
]][:SCAlar]:POWer[:DC]?
syntax:
:FETCh[
n
]:[CHANnel[
m
]][:SCAlar]:POWer[:DC]?
description:
Reads the current power meter value, or for a return loss module returns current power value at return loss diode (back
reflection path). It does not provide its own triggering and so must be used with either continuous software triggering (see
:INITiate[n]:[CHANnel[m]]:CONTinuous?
on page 91) or a directly preceding immediate software trigger (see
:INITiate[n]:[CHANnel[m]][:IMMediate]
It returns the value the previous software trigger measured. Any subsequent FETCh command will return the same value, if
there is no subsequent software trigger.
parameters:
none
response:
The current value as a float value in dBm,W or dB.
If the reference state is absolute, units are dBm or W.
If the reference state is relative, units are dB.
example:
fetc1:pow?
->
+6.73370400E-04<END>
affects:
All power meters, return loss modules, and attenuators with power sensors
dual sensors:
Master and slave channels are independent.
command:
:FETCh[
n
][:CHANnel[
m
]][:SCAlar]:RETurnloss?
syntax:
:FETCh[
n
]:[CHANnel[
m
]][:SCAlar]:RETurnloss?
description:
Reads the current return loss value. It does not provide its own triggering and so must be used with either continuous
software triggering (see
:INITiate[n]:[CHANnel[m]]:CONTinuous?
on page 91) or a directly preceding
immediate software trigger (see
:INITiate[n]:[CHANnel[m]][:IMMediate]
It returns the return loss value the previous software trigger measured. Any subsequent FETCh command will return the
same value, if there is no subsequent software trigger.
parameters:
none
response:
The current value as a float value in dB.
example:
fetc1:ret?
->
+6.73370400E-00<END>
affects:
All return loss modules
