Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.9 SEM Measurement
3.9.14 BW
Opens the Bandwidth (BW) menu, which contains controls for the Resolution
Bandwidth functions of the instrument.
The Resolution BW functions control filter type. There are two filter types, Gaussian
and Flattop. The Gaussian filters have a response curve that is parabolic on a log
scale. The Flattop filter shape is a close approximation of a rectangular filter.
3.9.14.1 Settings
Contains basic Bandwidth functions. The only tab under BW.
RBW Filter Type
Selects the type of bandwidth filter that is used in Carriers and Offsets:
Option SCPI Behavior
Gaussian
GAUSsian
The selected filter is applied to carriers and all offsets
Flattop
FLATtop
Auto Sense
ASENse
The filter type is automatically selected for each carrier and
offset in a way such that measurement speed and accuracy are
optimized
Filter Auto Sense Rules:
–
Flattop is selected when "Enable Wideband IF for FFT" on
page 1721 is ON
–
Flattop is selected for offsets close to the reference carrier
–
For all other cases, Gaussian is selected
Remote
Command
[:SENSe]:SEMask:BANDwidth:SHAPe ASENse | GAUSsian | FLATtop
[:SENSe]:SEMask:BANDwidth:SHAPe?
Example
:SEM:BAND:SHAP GAUS
:SEM:BAND:SHAP?
Preset
ASENse
State Saved Saved in instrument state
Range Auto Sense (each offset and carrier) | Gaussian (all offsets and carriers) | Flattop (all offsets and carriers)
Spectrum Analyzer Mode User's &Programmer's Reference 1603

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)