Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
Band Span Auto/Man
Determines whether the Band Span for Marker Noise will track the instrument’s
Span.
When you choose any Band Function, and Band Span Auto/Man is in the Auto state,
the Band Span is set to 5% of the screen width.
Adjusting the Band Span sets Band Span Auto/Man to Man.
This function only affects Marker Noise. While in Marker Noise and with Band Span
Auto/Man in the Auto state, if the instrument Span is changed Band Span will stay
at 5% of the new span.
If Band Span Auto/Man is in the Man state, the Band Span does not change when
Span is changed. Also, if any Band Function but Marker Noise is in effect, the Band
Span does not change when Span is changed.
The Band Span is set to 5% regardless of whether or not this would place part of the
Band offscreen. The Marker Noise function is well able to function with part of the
band offscreen.
Note that, if in Zero Span, “Span” should be replaced by “Sweep Time” in the
discussion above.
Remote Command
:CALCulate:MARKer[1]|2|…|24:FUNCtion:BAND:SPAN:AUTO ON | OFF
:CALCulate:MARKer[1]|2|…|24:FUNCtion:BAND:SPAN:AUTO?
Example Set the band span of marker 12 to Auto:
:CALC:MARK12:FUNC:BAND:SPAN:AUTO ON
Query the auto band span state of Marker 1:
:CALC:MARK:FUNC:BAND:SPAN:AUTO?
Dependencies Only appears when Marker Function for the selected marker is Marker Noise
Couplings When AutoBand Span is turned ON, it immediately adjusts the band span to 5% of Span. If you select
Marker Noise, and AutoBand Span is ON, the Band Span will immediately change to 5% of Span
If Band Span is changed, either by the Band Span key, the Band Left key, or the Band Right key, or the
equivalent commands, this function is set to Man
This function is set to Auto when the Marker is turned Off, or by Preset, or by "Auto Couple" on page
2017
Sending this command selects the subopcoded marker
Preset Auto
State Saved Saved in instrument state
Backwards
Compatibility
Notes
In legacy instruments, the Noise Marker had a width that was always equal to 5% of the span. But in
the X-Series it is possible for the user to change the span of the Marker Noise band using the Band
Adjust function. To preserve the legacy behavior, the Band Span Auto/Man function is provided. When
it is in Auto, which it is by default, the Maker Noise band is always held at 5% of Span, even if the Span
Spectrum Analyzer Mode User's &Programmer's Reference 355

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)