Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
If Span is set to a value greater than the maximum allowable span of the instrument,
an error message is generated indicating the data is out of range and was clipped to
upper limit.
Remote Command
[:SENSe]:FREQuency:SPAN <freq>
[:SENSe]:FREQuency:SPAN?
Example Set the span to 2GHz:
:FREQ:SPAN 2GHz
Dependencies If the electrical attenuator is enabled, any attempt to set Span such that the Stop Freq would be
>3.6GHz results in an error
If Source Mode is set to Tracking, and Span is therefore limited by the limits of the source, a warning
message is generated, “Data out of range; clipped to source max/min” if these limits are exceeded.
Note that for an external source, these limits can be affected by the settings of Source Numerator,
Source Denominator, and Power Sweep
In instruments with an RF Preselector, such as MXE, you cannot sweep across the band break at
3.6GHz while the RF Preselector is on in Continuous sweep, because there is a mechanical switch
that bypasses the RF Preselector above 3.6GHz. For details, see Stop Freq
Couplings Span affects Res BW, Sweep Time, FFT & Sweep choice (including FFT Width, Phase Noise
Optimization and ADC Dither auto couplings)
When operating in Swept Span:
–
When the value is being set through the front panel numeric keypad or the SCPI command, any
value of Center Frequency or Span that is within the frequency range of the instrument is allowed.
The other parameter is forced to a different value, if necessary, to keep Start Freq and Stop Freq
within the instrument’s frequency range
–
When using the knob or the step up/down keys, or the UP |DOWN keywords in SCPI, the value
that is being changed, that is, Center Frequency or Span, is limited so that the other parameter is
not forced to a new value
Span cannot be set to zero by setting Start Freq = Stop Freq. The value of the last setting changes to
maintain a minimum difference of 10Hz between Start Freq and Stop Freq
Preset Depends on instrument maximum frequency, mode, measurement, and selected input
See "Span Presets" on page 289
State Saved Saved in instrument state
Min 10Hz, unless entered directly, then 0Hz is allowed, but no value between 0 and 10 is ever allowed
If the Zoomed Trace window is visible, Zero Span is not allowed, so Span may not go below 10Hz
If the Zone Spectrum window is visible, Zero Span is not allowed in the Spectrum window, so Span
may not go below 10Hz in the Spectrum window
Max Depends on instrument maximum frequency, mode, measurement, and selected input. See "Span
Presets" on page 289
If the knob or step keys are being used, depends on the value of the other three interdependent
parameters: Center Frequency, Start Freq, Stop Freq
Note that, if the Source Mode is set to Tracking, the effective instrument maximum Span may be
limited by the source maximum frequency
288 Spectrum 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)