Keysight x-series User Manual

6 Input/Output
6.3 External Gain
Note that the Ref Lvl Offset and Maximum Mixer Level are described in the
Amplitude section. They are reset by Mode Preset. The External Preamp Gain is
reset by the "Restore Input/Output Defaults" or "Restore System Defaults->All
functions.
The Swept SA Measurement in SA Mode only supports the “Ext Preamp” function
under External Gain. The other External Gain functions are grayed-out, and
generate a settings conflict, if the SCPI for them is sent.
See "More Information" on page 2401
Remote Command
[:SENSe]:CORRection:SA[:RF]:GAIN <rel_ampl>
[:SENSe]:CORRection:SA[:RF]:GAIN?
Example Set the Ext Gain value to 10dB:
:CORR:SA:GAIN 10
Set the Ext Gain value to -10dB (that is, an attenuation of 10dB):
:CORR:SA:GAIN -10
Notes Does not auto return
This command is new in X-Series
Dependencies The reference level limits are determined in part by the External Gain/Atten, Max Mixer Level, and RF
Atten
Grayed-out in Modes that do not support External Gain
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
Min -120dB
Max 120dB
Annotation Displayed in the Meas Bar as "Ext Gain <value>". When the gain is zero, no annotation is shown
Backwards
Compatibility SCPI
[:SENSe]:CORRection:OFFSet[:MAGNitude]
The legacy Ext Preamp Gain key is now called Ext Gain and the sub-menu has choices of Ext Preamp |
MS | BTS for backwards compatibility
The MS and BTS choices are unavailable in Swept SA and the Ext Preamp is unavailable in the cell
comms measurements
More Information
The U7227A USB Preamplifier is an accessory for the X-Series Signal Analyzer that
provides gain externally, and whose gain settings are automatically loaded into the
instrument over USB whenever it is connected to one of the instrument’s USB ports.
While the USB Preamplifier is plugged into one of the instrument’s USB ports, the
instrument will consider it to be in the signal path of the RF Input and will apply the
Spectrum Analyzer Mode User's &Programmer's Reference 2401

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)