Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.5 Channel Power Measurement
Res BW
Activates the resolution bandwidth active function, which allows you to manually set
the resolution bandwidth (RBW) of the instrument.
Normally, Res BW (Auto) selects automatic coupling of Res BW to "Span" on page
614, using the ratio set by Span:3 dB RBW (some measurements do not have a
Span:3 dB RBW control, in which case the measurement chooses the optimal ratio).
To decouple the resolution bandwidth, press the Auto/Man toggle on Res BW, or
simply enter a different value for Res BW.
When Res BW is manually selected, you can return it to the coupled state by
pressing the Auto/Man toggle on Res BW. This may also be done by pressing "Auto
Couple" on page 1709 or by performing a Preset.
For more details, see "More Information" on page 597
Remote
Command
[:SENSe]:CHPower:BANDwidth[:RESolution] <bandwidth>
[:SENSe]:CHPower:BANDwidth[:RESolution]?
Example
:CHP:BAND 5 MHz
:CHP:BAND?
Notes For numeric entries, all RBW Types choose the nearest (arithmetically, on a linear scale, rounding up)
available RBW to the value entered
The setting and querying of values depend on the current bandwidth type
Couplings Sweep time is coupled to RBW. As RBW changes, the sweep time (if set to Auto) is changed to maintain
amplitude calibration
Video bandwidth (VBW) is coupled to RBW. As the resolution bandwidth changes, the video bandwidth
(if set to Auto) changes to maintain the ratio of VBW/RBW (10:1)
When Res BW is set to Auto, the resolution bandwidth is auto-coupled to the span. The ratio of
Span/RBW is approximately 106:1 when auto coupled. When Res BW is set to Man, and the
bandwidths are entered manually, these bandwidths are used regardless of other instrument settings
Preset See "RBW Presets" on page 597
State Saved Saved in instrument state
Min 1 Hz
Max 8 MHz is the max equivalent –3 dB RBW, which means that the named RBW (the one shown on the
control etc.) can actually exceed 8 MHz if using a filter other than –3 dB Gaussian
Annotation A “#” mark appears before “RBW” in the annotation when it is switched from Auto to Manual coupling
Backwards
Compatibility
Notes
For backwards compatibility, this command supports both the BANDwidth and BWIDth forms
Auto Function
Remote
[:SENSe]:CHPower:BANDwidth[:RESolution]:AUTO ON | OFF | 1 | 0
596 Short Range Comms & IoT 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)