Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
VBW:3dB RBW
Selects the ratio between the video bandwidth and the equivalent 3dB resolution
bandwidth to be used for setting Video BW when VBW is in Auto.
VBW:3dB RBW (Auto) selects automatic coupling of the Video BW:3dB Res BW
ratio to "Detector" on page 521, using the rules described below in "Coupling Auto
Rules" on page 251. To decouple the ratio, press the Auto/Man toggle on VBW:3dB
RBW, or simply enter a different value for VBW:3dB RBW.
When VBW:3dB RBW is manually selected, it may be returned to the coupled state
by setting the toggle on VBW:3dB RBW back to Auto. This may also be done by
pressing "Auto Couple" on page 2017, or by performing a Preset.
Remote Command
[:SENSe]:BANDwidth|BWIDth:VIDeo:RATio <real>
[:SENSe]:BANDwidth|BWIDth:VIDeo:RATio?
Example
:BAND:VID:RAT 2
:BAND:VID:RAT?
Notes The values shown in this table reflect the conditions after Mode Preset
Dependencies In VXT, when in Zero Span, this control does not appear
Couplings See "Coupling Auto Rules" on page 251
Preset 1
State Saved Saved in instrument state
Min 0.00001
Max 3000000
Backwards
Compatibility
Notes
For backwards compatibility this command obeys both the BANDwidth and BWIDth forms
Auto Function
Remote
Command
[:SENSe]:BANDwidth|BWIDth:VIDeo:RATio:AUTO OFF | ON | 0 | 1
[:SENSe]:BANDwidth|BWIDth:VIDeo:RATio:AUTO?
Example
:BAND:VID:RAT:AUTO 0
:BAND:VID:RAT:AUTO?
Preset
ON
Backwards
Compatibility
SCPI
[:SENSe]:SFRequency:BWIDth:VIDeo:RATio:AUTO
Coupling Auto Rules
The Auto Rules for the VBW:3dB RBW function are as follows.
Spectrum Analyzer Mode User's &Programmer's Reference 251

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)