Keysight x-series User Manual

6 Input/Output
6.2 Input
Select the 4.8GHz amplitude reference as the signal input:
:FEED:AREF REF4800
Turn the calibrator "off" (switches back to the selected input - RF or I/Q):
:FEED:AREF OFF
Dependencies Only appears when RF Input is selected as the Input
Selecting an input (RF, Ext Mix or I/Q) turns the Calibrator OFF. This is true whether the input is
selected using the menu panel or [:SENSe]:FEED
The 4.8GHz internal reference is only available in some models and frequency range options. If the 4.8
GHz reference is not present, the 4.8 GHz choice does not show, and if the REF4800 parameter is
sent, the instrument generates an error
Couplings When one of the calibrator signals is selected, the instrument routes that signal (an internal amplitude
reference) to the instrument, and changes the main input selection to RF so the calibrator signal can
be seen. When you turn the calibrator off it does not switch back to the previously selected input
Preset
OFF
State Saved Saved in instrument state
Annunciation An advisory message is sent, indicating that the input is set to internal
Backwards Compatibility SCPI
Notes For ESA backwards compatibility
In the ESA the calibrator was a separate output which you connected to the input and switched on with
this command
In X-Series, the ON parameter is aliased to [:SENSe]:FEED:AREF REF50 and the OFF parameter
is aliased to [:SENSe]:FEED:AREF OFF
When :CALibration:SOURce:STATe? is received, 1 is returned if any of the references is
selected, or 0 if the Calibrator is OFF
Preset
OFF
Backwards
Compatibility
SCPI
:CALibration:SOURce:STATe OFF | ON | 0 | 1
:CALibration:SOURce:STATe?
6.2.10 RF Coupling
Specifies alternating current (AC) or direct current (DC) coupling at the instrument
RF input port. Selecting AC coupling switches in a blocking capacitor that blocks any
DC voltage present at the instrument input. This decreases the input frequency
range of the instrument, but prevents damage to the input circuitry of the
instrument if there is a DC voltage present at the RF input.
NOTE
When operating in DC coupled mode, ensure protection of the instrument input
circuitry by limiting the DC part of the input level to within 200 mV of 0 Vdc. In AC
or DC coupling, limit the input RF power to +30dBm (1 Watt).
Spectrum Analyzer Mode User's &Programmer's Reference 2355

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)