Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.7 Burst Power Measurement
SW Preselection BW
Specifies the effective bandwidth to be used for Software Preselection.
The options are:
–
NORMal – when making Swept measurements, a software preselection algorithm
is used which takes up to 4 background acquisitions, then post-processes the
result. This algorithm can remove images from signals with an occupied
bandwidth up to around 3GHz. (Default/Preset setting). When making FFT
measurements, this algorithm is not used, instead the same algorithm is used as
for NARRow (below)
–
NARRow– a software preselection algorithm is used which takes two background
acquisitions, then post-processes the result to detect and remove images from
wideband signals with occupied bandwidths up to 2GHz. This increases the risk
of images failing to be rejected, but improves the measurement speed
Remote Command
[:SENSe]:POWer[:RF]:SWPResel:BW NORMal | NARRow
[:SENSe]:POWer[:RF]:SWPResel:BW?
Example
:POW:SWPR:BW NARR
Dependencies Only appears in N9041B and N9042B+V3050A. Only appears in measurements that use the Swept
method
Grayed-out when "Software Preselection" on page 1992 is OFF. The grayout message is “Unavailable
unless SW Presel enabled”
For N9042B+V3050A, the parameter is SCPI-only, and always set to NARRow when Software
Preselection is enabled
Preset
N9041B
NORMal
N9042B+V3050A
NARRow
State Saved Saved in instrument state
High Freq Prefilter
Lets you set the state of Prefilter for center frequencies above 1310MHz.
In VXT Models M9410A/11A and M9410E/11E in bypass frequency range
(1310MHz~5GHz), the Receiver RF path has a bank of filters that come after the RF
Attenuator in the signal path. Since this bank of filters precedes the mixer they are
known as the “Prefilter” bank. Their purpose is to eliminate unwanted in-band
mixing products by filtering out all but the desired frequencies before the signals get
to the mixer. There are 13 prefilter bands to cover the frequencies between 9kHz
1290 Spectrum 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)