Marker Data - HP 8753E Programming And Command Reference Manual

Marker Data

The network analyzer offers several options for outputting trace-related
data. Data can be selectively read from the trace using the markers,
or the entire trace can be read by the controller. If only specific
information is required (such as a single point on the trace or the result
of a marker search), the marker output command can be used to read
the information. Specific data points can be read using the OUTPDATP
or OUTPDATR commands. These commands allow a much faster data
transfer than when using markers to output specific data points. For
more information on these commands, see "Limit Line and Data Point
Special Functions," located in HP BASIC Programming Examples Guide
A marker must first be assigned to the desired frequency before it can
be used to read the trace data. This is accomplished using the marker
commands. The controller sends a marker command followed by a
frequency within the trace-data range. If the actual desired frequency
was not sampled, the markers can be set to continuous mode and the
desired marker value will be linearly interpolated from the two nearest
points. This interpolation can be prevented by putting the markers into
discrete mode. Discrete mode allows the marker to only be positioned
on a measured trace-data point.
As an alternative, the analyzer can be programmed to choose the
stimulus value by using the MARKER SEARCH function. Maximum,
minimum, target value, or bandwidths search can be automatically
determined with MARKER SEARCH. lb continually update the search,
switch the marker tracking ON. The trace-maximum search will remain
activated until:
The search is switched OFF.
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