Rf Preselector - Keysight x-series User Reference Manual

4 Input/Output Functions
Input/Output
Nominal
Input 2 Max
Model Freq
N9038A 1 GHz
N9000A 1.5 GHz
with
option
C75

RF Preselector

In models that support the RF Preselector, such as MXE (N9038A), this key allows you to turn the
preselector on and off.
When using the RF Preselector, if your measurement starts below 3.6 GHz and finishes above 3.6 GHz, the
preselector bypass switch will have to switch in and out for every measurement. When this is the case, you
will hear a clicking sound from the instrument and a warning message will be displayed: "Settings
Alert:Mechanical switch cycling". You are advised to avoid such setups as much as possible, to minimize
switch wear. Pressing Mode Preset will reset the Stop Freq to 3.6 GHz and get you out of this state, or you
can manually set the Stop Freq to be below 3.6 GHz.
Key Path
Mode
Remote Command
Example
Example
Notes
Dependencies
156
Absolute Input
2 Max Freq Transition rule for switching from Input 1 to Input 2
• If the Stop Freq is above 1.000025 GHz, it is set to
1.000025 GHz
1.000025 GHz, otherwise it does not change.
• If the Start Freq is above 1.000024990 Hz, Start Freq is set
to 1.000024990 Hz and Span to 10 Hz, otherwise nothing
changes.
• If the Stop Freq is above 1.58 GHz, it is set to 1.58 GHz,
1.58 GHz
otherwise it does not change.
• If the Start Freq is above 1.579999990 GHz, Start Freq is
set to 1.579999990 GHz and Span to 10 Hz, otherwise
nothing changes
Input/Output, RF Input
All
[:SENSe]:POWer[:RF]:RFPSelector[:STATe] 1|0|ON|OFF
[:SENSe]:POWer[:RF]:RFPSelector[:STATe]?
:POW:RFPS 1
:INP:PRES:STAT ON
[:SENSe]:POWer[:RF]:RFPSelector[:STATe] 1|ON. Sets to full compliance measurement.
[:SENSe]:POWer[:RF]:RFPSelector[:STATe] 0|OFF. Sets to pre-compliance measurement.
The RF Preselector is not available in all measurements. The key is grayed out in measurements that
do not support it, unless you are in a Mode in which no measurements support it, in that case the key
does not appear at all. If the preselector is unavailable it is forced to Off. Attempting to turn it on or
off in measurements that do not support it generates an error message:
–221.3200, Settings conflict; Feature not supported for this measurement.
The RF Preselector is not available when FFT Sweep Type is manually selected. Attempting to turn it
on or off when this is the case generates an error message:
"–221, Settings conflict; RF Presel unavailable when Sweep Type=Manual FFT".
This key only appears in Modes that support the RF Preselector, in other Modes, setting or querying
the SCPI will generate an error.
EMI Receiver Mode Reference