Chapter 3 219
Mode
Return Loss
Mode
Select Trace
Selects which trace the menu keys will affect. Press
Select Trace until the number of the
desired trace is underlined.
Update On/Off (View)
This key lets you turn
Off active trace updating. That is, make it an inactive trace (or a
stored trace). This does not affect whether the trace is visible or not. Use the
Display
Show/Blank key to change its visibility.
• When a trace becomes inactive, the following things happen:
• Updates to the trace stop after the current sweep is complete.
• The trace is displayed at half intensity (a long as it stays inactive)
• Inactive traces 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 will affect the vertical placement of data.
• 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
When a trace becomes active (
Update = On), the trace is cleared, the average count is reset,
and the instrument prepares to begin a new sweep.
Preset Trace 1
State Saved The number of the selected trace is saved in Instrument State
Range 1 | 2
Key Path
Trace/Detector, Select Trace
Dependencies / Couplings Setting the trace type (even to the type it was already in) puts the
trace in
Update = On
Preset On for Trace 1; Off for 2
State Saved Saved in Instrument State
Key Path
Trace/Detector, Update On/Off (View)
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