190
8163A/B, 8164A/B & 8166A/B Mainframes Programming Guide
4
Measurement Operations & Settings
command:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet
syntax:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet<wsp><value>[DB] | MIN | MAX | DEF
description:
Sets a power offset (
P
offset
). This factor is used to offset the power value. It does not affect the filter, nor does it change the
power output at the attenuator module.
P
set(new)
(dBm) = P
att
(dBm) - P
offset(new)
(dB)
If the wavelength offset table is enabled, the corresponding
λ
offset is added to this offset.
parameters:
<value>
MIN | MAX | DEF
The power offset required, in dB
Queries the module limits, or the default.
response:
none
example:
OUTP1:POW:OFFS 2
affects:
Attenuator modules with power control.
command:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet?
syntax:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet? <wsp>MIN | MAX| DEF
description:
Without the optional parameter, queries the power offset value.
parameters:
MIN | MAX | REF
Queries the power offset limits, or the module default.
response:
4 byte Intel floating point; power offset in current power units.
example:
OUTP1:POW:OFFS?
->
2<END>
affects:
Attenuator modules with power control.
command:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet:POWermeter
syntax:
:OUTPut
n
[:CHANnel[
m
]]:POWer:OFFSet:POWermeter<wsp><slot>,<channel>
description:
Calculates the power offset by subtracting the power value measured by another powermeter (hosted by the same
mainframe) from the power value measured by the attenuator’s integrated powermeter, and stores it as
P
offset
.
P
offset(new)
(dBm)
= P
att
(dBm)
- P
ext
(dBm)
+ P
offset (
λ
)
(dB)
parameters:
<slot>
<channel>
Slot number of the external powermeter.
Channel number of the external powermeter.
