3 Spectrum Analyzer Mode
3.8 Spurious Emissions Measurement
:FREQ:OFFS?
Notes Preset and Max values depend on Hardware Options
Dependencies Appears only in SA Mode
Freq Offset is not available in External Mixing. In this case the Freq Offset control is grayed-out and
displays a value of zero. However, the value of CF Offset that was set for the RF Input is retained and
restored when you switch back to the RF Input
Preset See "Center Frequency Presets" on page 1441
State Saved Saved in instrument state
Min/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 supported for compatibility across platforms and is not
recommended for new development
More Information
This command does not affect any bandwidths, nor the settings of relative frequency
parameters such as delta markers or span (range). 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 immediately
changes all the above, without taking new data.
NOTE
If a trace is exported with a nonzero Freq Offset, the exported data contains 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 will 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.
3.8.7 Marker
Accesses a menu that enables you to select, set up and control the markers for the
current measurement. If there are no active markers, Marker selects marker 1, sets it
to Normal and places it at the center of the display. If the selected marker is Off, it is
set to Normal and placed it at the center of the screen on the trace determined by
the Marker Trace rules.
1422 Spectrum Analyzer Mode User's &Programmer's Reference
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