Keysight x-series Instruction Manual

3 Short-Range Comms & IoT Mode
3.12 Monitor Spectrum Measurement
1687 in the Frequency menu on the front panel always applies to the currently
selected input.
Remote
Command
[:SENSe]:FREQuency:IQ:CENTer <freq>
[:SENSe]:FREQuency:IQ:CENTer?
Example
:FREQ:IQ:CENT 30 MHz
Notes This command is the same in all Modes, but the parameter is Measurement Global, so the value is
independent in each Mode and common across all the measurements in the Mode
Preset 0 Hz
State Saved Saved in instrument state
Min -40.049995 MHz
Max 40.049995 MHz
Span
Changes the displayed frequency range symmetrically about the center frequency.
While adjusting the Span, the Center Frequency is held constant, this means that
both Start Frequency and Stop Frequency will change.
If the 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.
See "Span Presets" on page 1695
Remote Command
[:SENSe]:MONitor:FREQuency:SPAN <freq>
[:SENSe]:MONitor:FREQuency:SPAN?
Example
:MON:FREQ:SPAN 10 MHz
:MON:FREQ:SPAN?
Dependencies If the electrical attenuator is enabled, any attempt to set Span such that the Stop Frequency would be
>3.6 GHz results in an error
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, as there is a mechanical switch which
bypasses the RF Preselector above 3.6GHz
Couplings Span affects RBW, sweeptime, FFT & Sweep choice (including FFT Width, Phase Noise Optimization
and ADC Dither auto couplings)
–
Any value of the Center Frequency or Span that is within the frequency range of the instrument is
allowed when the value is being set through the front panel numeric keypad or the SCPI
command. The other parameter is forced to a different value if needed, to keep the Start and the
Stop Frequencies 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 i.e., the Center Frequency or Span, is limited so that the other parameter is not
1694 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)