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919
Common Measurement Functions
FREQ Channel
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 analyzer, 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 of 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 analyzer, you would want Freq Offset to be 0, or the offset would be
applied again to data which is already offset. No such care need be taken when
saving a State+Trace file because the data and state are saved together.
Min: –500 GHz
Max: 500 GHz
Default Unit: Hz
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: 1. In pre-X-Series instruments, Frequency Offset could not be adjusted by
the knob or step keys. That is no longer the case.
2. Some previous spectrum analyzers did not adjust frequency counter
results for the Frequency Offset. The X-Series does adjust the frequency
counter for the offset.
Initial S/W Revision: Prior to A.02.00
Modified at S/W Revision: A.04.00, A.08.50