Keysight x-series Programmer's Reference

6 Input/Output
6.3 External Gain
calibration data from the USB Preamp to measurements taken at the RF Input (on 2
input boxes, it will be considered to be in the signal path of RF Input 1; it is not
supported for RF Input 2).
The USB Preamplifier contains its own cal data. This includes a noise trace suitable
for use with NFE, for those models which support NFE. The act of connecting the
Preamp to USB will cause the cal data to be downloaded from the preamp. When
this happens, an informational message is provided saying “Cal data loaded from
USB Preamp”. The instrument will then automatically apply the calibration factors
loaded from the Preamp in any measurement that supports the USB Preamp.
The External Preamp Gain setting may still be used, even though it is not required
for the USB Preamp (since the USB Preamp supplies its own gain data to the
instrument which is applied automatically). Connecting the USB Preamp does not
change the External Preamp Gain setting, however unless you have another gain or
attenuation element in the signal path, the appropriate setting for External Preamp
Gain is 0 dB.
Overload detection and reporting will apply when the USB preamplifier is connected
to USB. The USB Preamplifier has its own overload detector which reports overloads
to the instrument over USB. This generates an error condition, “Input Overload; USB
Preamp.”
If, while the USB Preamp is connected to USB, a measurement is selected that does
not support the USB preamplifier, the "No result; Meas invalid with Preamp" error
condition is generated.
6.3.2 External Gain - MS
Sets an external gain/attenuation value for MS (Mobile Station) tests.
Remote Command
[:SENSe]:CORRection:MS[:RF]:GAIN <rel_ampl>
[:SENSe]:CORRection:MS[:RF]:GAIN?
Example Set the Ext Gain value to 10dB:
:CORR:MS:GAIN 10
Set the Ext Gain value to -10dB (that is, a loss of 10dB):
:CORR:MS:GAIN -10
Notes Does not auto return
Dependencies The reference level limits are determined in part by the External Gain, Max Mixer Level, RF Atten
Grayed-out in modes that do not support MS
Preset Unaffected by Preset, but set to 0dB by Restore Input/Output Defaults or Restore System Defaults-
>All
0.00 dB, Gain
State Saved Saved in instrument state
2191 Vector Modulation Analyzer Mode User's &Programmer's Reference

Keysight x-series Specifications

General

Analysis Bandwidth	Up to 1 GHz (depending on model)
Real-Time Bandwidth	Up to 1 GHz (depending on model)
Form Factor	Benchtop
Connectivity	LAN, USB, GPIB
Resolution Bandwidth	1 Hz to 10 MHz (depending on model)