Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.10 TOI Measurement
Auto Function
Remote
Command
[:SENSe]:TOI:BANDwidth|BWIDth[:RESolution]:AUTO ON | OFF | 1 | 0
[:SENSe]:TOI:BANDwidth|BWIDth[:RESolution]:AUTO?
Example
:TOI:BAND:AUTO ON
:TOI:BAND:AUTO?
Video BW
Lets you change the instrument post-detection filter (VBW or “video bandwidth”)
from 1Hz to 8MHz in approximately 10% steps. In addition, a wide-open video filter
bandwidth may be chosen by selecting 50MHz. The VBW is annotated at the
bottom of the display, in the center.
Normally, Video BW (Auto) selects automatic coupling of the Video BW to RBW
using the ratio set by the VBW:3 dB RBW control. To decouple the resolution
bandwidth, press the Auto/Man toggle on the Video BW control, or simply enter a
different value for Video BW.
When the Video BW is manually selected, it may be returned to the coupled state by
pressing the Auto/Man toggle on the Video BW control. This may also be done by
pressing "Auto Couple" on page 2017 or by performing a Preset.
Remote
Command
[:SENSe]:TOI:BANDwidth|BWIDth:VIDeo <freq>
[:SENSe]:TOI:BANDwidth|BWIDth:VIDeo?
Example
:TOI:BAND:VID 1 KHZ
:TOI:BAND:VID?
Notes For numeric entries, the instrument chooses the nearest (arithmetically, on a linear scale, rounding up)
available VBW to the value entered. The 50MHz VBW is defined to mean “wide open”
The values shown in this table reflect the conditions after a Mode Preset
Couplings Normally coupled to RBW. If VBW is set to Auto, then VBW changes as RBW changes, to maintain the
ratio set by "VBW:3dB RBW" on page 1808 (usually 10:1 for measurements that do not have a VBW:3
dB RBW control)
Preset Auto
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 supports both BANDwidth and BWIDth forms
Spectrum Analyzer Mode User's &Programmer's Reference 1807

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)