Keysight x-series User Manual

3 Spectrum Analyzer Mode
3.4 Occupied BW Measurement
Notes Preset and Max values depend on Hardware Options
Dependencies Appears only in Spectrum Analyzer Mode
Not available in External Mixing. In this case, the control is grayed-out and shows a value of zero.
However, the value of CF Offset that was set for the RF Input is retained and is restored when you
switch back to the RF Input
Preset See table under "Center Frequency" on page 783
State Saved Saved in instrument state
Min -500 GHz
Max 500 GHz
Annotation If Frequency Offset is not zero, “Freq Offset <value>” appears on the upper line of the annotation,
below the graticule, in the center
Status Bits/OPC
dependencies
Non-overlapped
Backwards
Compatibility SCPI
:DISPlay:WINDow[1]:TRACe:X[:SCALe]:OFFSet
The DISPlay version of the command is in the instrument for compatibility across platforms and is
not recommended for new development
Backwards
Compatibility
Notes
In pre-X-Series instruments, Freq Offset could not be adjusted by the knob or step keys. That is no
longer the case
Some previous spectrum analyzers did not adjust frequency counter results for Freq Offset. The X-
Series does adjust the frequency counter for the offset
More Information
This command does not affect any bandwidths or the settings of relative frequency
parameters such as delta markers or span. It does not affect the current hardware
settings of the instrument, but only the displayed frequency values. Entering an
offset does not affect the trace position or display, just the value of the start and
stop frequency and the values represented by the trace data. The frequency values
of exported trace data, queried trace data, markers, trace data used in calculations
such as NdB points, trace math, etc., are all affected by Freq Offset. Changing the
offset, even on a trace that is not updating will immediately change all the above,
without taking new data.
NOTE
If a trace is exported with a nonzero Freq Offset, the exported data will contain
the trace data with the offset applied. Therefore, if that trace were to be imported
back into the instrument, you would want Freq Offset to be 0, or the offset would
be applied again to data that is already offset. No such care need be taken when
saving a State+Trace file because the data and state are saved together.
Spectrum Analyzer Mode User's &Programmer's Reference 791

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)