Keysight x-series Programmer's Reference

3 VMA Mode
3.1 Digital Demod Measurement
RF Center Freq
Specifies the RF Center Frequency. Sets the Center Frequency to be used when the
RF input is selected, even if the RF input is not the input that is selected at the time
the command is sent.
Note that Center Frequency in the Frequency menu on the front panel always
applies to the currently selected input.
Remote Command
[:SENSe]:FREQuency:RF:CENTer <freq>
[:SENSe]:FREQuency:RF:CENTer?
Example
:FREQ:RF:CENT 30 MHz
:FREQ:RF:CENT?
Notes This command is the same in all modes, but the parameter is Measurement Global. So the value is
independent in each mode and common across all the measurements in the mode
Dependencies If the electronic/soft attenuator is enabled, any attempt to set Center Frequency such that the Stop
Frequency would be >3.6 GHz fails and results in an advisory message. If the equivalent SCPI
command is sent, this same message is generated as part of a “-221, Settings conflict” warning
Preset See table above
State Saved Saved in instrument state
Min -79.999995 MHz
Max See table above. Basically instrument maximum frequency - 5 Hz
If the knob or step keys are being used, also depends on Span
Ext Mix Center Freq
Specifies the External Mixer Center Frequency. Sets the Center Frequency to be
used when the External Mixer is selected, even if the External Mixer input is not the
input which is selected at the time the command is sent.
Note that Center Frequency in the Frequency menu on the front panel always
applies to the currently selected input.
Remote
Command
[:SENSe]:FREQuency:EMIXer:CENTer <freq>
[:SENSe]:FREQuency:EMIXer:CENTer?
Example
:FREQ:EMIX:CENT 60 GHz
:FREQ:EMIX:CENT?
Notes This command is the same in all modes, but the parameter is Measurement Global. So the value is
independent in each mode and common across all the measurements in the mode
Couplings When returning to External Mixing after having been switched to one of the other inputs ( for example,
RF), you will come back into the settings that you had when you left External Mixing. So you will come
back to the band you were in with the Center Frequency that you had. However, Span is not an input-
dependent parameter, therefore you will bring the span over from the other input. Therefore, the
instrument comes back with the span from the previous input, limited as necessary by the current mixer
Vector Modulation Analyzer Mode User's &Programmer's Reference 286

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)