Keysight x-series Programmer's Reference

3 VMA Mode
3.8 ACP Measurement
cannot be used, because it uses the same hardware as the Average Detector
–
When the Quasi-Peak, EMI Average or RMS Average detector is selected the VBW is implemented
by the digital IF as part of the detector
When this is the case, the VBW still acts to change the sweep time, if Sweep Time is in Auto, and still
affects the data on other traces for which this is not the case
Disabled when "Meas Method" on page 1246 is RBW, FAST, FPOWer
If pressed, an advisory message is generated. If the equivalent command is sent, a "Setting conflict"
warning is generated
Couplings Video bandwidth (VBW) is normally coupled to RBW. If VBW is set to Auto, then the VBW is changed
as the RBW changes, to maintain the ratio (usually 10:1)
Preset See "VBW Presets" on page 1217 below
State Saved Saved in instrument state
Min 1 Hz
Max 50 MHz
Annunciation A “#” mark appears before “VBW” in the annotation when it is not coupled
Annotation In the bottom center of the screen, “VBW <value> <units>” indicates the current video bandwidth
value. Note that for some detectors this is not the value actually used for VBW (see above)
Backwards
Compatibility
Notes
For backwards compatibility this command accepts both the BANDwidth and BWIDth forms
Auto Function
Remote
Command
[:SENSe]:ACPower:BANDwidth:VIDeo:AUTO ON | OFF | 1 | 0
[:SENSe]:ACPower:BANDwidth:VIDeo:AUTO?
Example
:ACP:BAND:VID:AUTO ON
VBW Presets
Unless noted in the table below, the Preset value of Video BW is Auto.
Mode Preset Value
WCDMA 1 MHz
RBW Filter Type
Selects the type for the resolution bandwidth filters. Historically, the Res BW filters
in HP/Agilent/Keysight spectrum analyzers were Gaussian filters, specified using the
–3 dB bandwidth of the filter. That is, a 10 MHz Res BW filter was a Gaussian shape
with its –3 dB points 10 MHz apart. In X-Series, the RBW Filter BW menu lets you
choose between a Gaussian and Flat Top filter shape, for varying measurement
conditions.
1217 Vector Modulation 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)