3 Spectrum Analyzer Mode
3.2 Swept SA Measurement
1|0|0
ON for Trace 1; OFF for 2 &3
State Saved Saved in instrument state
More Information
When a trace becomes inactive, any update from the :SENSe system (detectors)
immediately stops, without waiting for the end of the sweep. The trace data remains
unchanged, but stops updating. If the trace is blanked, this still does not affect the
data in the trace. Traces that are blanked (Display=OFF) do not display nor appear
on printouts, but their data stays intact, they may be queried, and markers may be
placed on them
In most cases, inactive traces are static and unchanging; however, there are cases
when an inactive trace will update, specifically:
–
if data is written to that trace from remote
–
if trace data is loaded from mass storage
–
if the trace is the target of a Copy or participant in an Exchange
–
if the trace is cleared using Clear Trace
Inactive traces that are also being displayed (traces in View) are displayed at half
intensity. Traces in View display across the entire X-Axis of the instrument. Their
horizontal placement does not change, even if X-Axis settings subsequently are
changed, although Y-Axis settings do affect the vertical placement of data.
When a trace becomes active (Update=ON), the trace is cleared, the average count is
reset, and a new sweep is initiated.
Note that putting a trace into Display=OFF and/or Update=OFF does not restart the
sweep and does not restart Averaging or Hold functions for any traces.
Trace Settings Table
Lets you configure the Trace system using a visual utility.
Clear All Traces
Clears all traces. Does not affect the state of any function or variable in the
instrument. Loads mintracevalue into all of the points for all traces, except traces
in Min Hold, in which case it loads maxtracevalue, even if Update = OFF.
520 Spectrum Analyzer Mode User's &Programmer's Reference
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