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1304
Trace/Detector
trace is underlined.
Clear Write
In Clear Write type each trace update replaces the old data in the trace with new data. Pressing the Clear
Write
key for the selected trace, or sending the TRAC:TYPE WRIT command for the specified trace, sets
the trace type to
Clear Write and causes the trace to be cleared. Then a new sweep is initiated.
Because pressing
Clear Write stops the current sweep and initiates a new one, Trace Average, Max
Hold
and Min Hold data may be interrupted in mid-sweep, and may not accurately reflect the displayed
count. Therefore, when
Clear Write is pressed for one trace, Trace Average, Max Hold and Min Hold
must restart for all traces.
When in
Clear Write, if a measurement-related instrument setting is changed, a new sweep is initiated
but the trace is not cleared.
Trace Average
In Trace Average type the test set maintains and displays an average trace, which represents the
cumulative average on a point-by-point basis of the new trace data and previous averaged trace data.
Details of the averaging calculations may be found under “Average/Hold Number” on page 1047 and
“Average Type” on page 1048
in the Meas Setup Section.
See “Trace Averaging: More Information” on page 1305.
Key Path Trace
Preset Trace 1
State Saved The number of the selected trace is saved in Instrument State
Initial S/W Revision Prior to A.02.00
Key Path
Trace/Detector
Example TRAC:TYPE WRIT
Notes See ““Trace/Detector” on page 1301”.
Couplings Whenever you press
Clear Write or send the equivalent SCPI command,
Update
is set to On and Display is set to On.
Automatic detector selection and the VBW:RBW ratio auto rules both depend
on the trace type selections
Preset After a Preset, any trace that is in
Clear Write is cleared (all trace points set to
mintracevalue).
State Saved The type for each trace is saved in Instrument State
Initial S/W Revision Prior to A.02.00
Key Path
Trace/Detector