88 N9912A FieldFox User’s Guide
Then Trigger Settings
Then Trig Slope
Then choose from the following:
o Pos Sweep is triggered by the rising (positive) edge of signal.
o Neg Sweep is triggered by the falling (negative) edge of signal.
Trigger Delay
After a valid External or Video trigger signal is received, the sweep begins after
the specified Trigger Delay time. Only positive values are allowed.
To see the rising edge of a repetitive signal which is triggered on that edge, use
trigger delay to clearly view the subsequent signal one period later.
Press Sweep 3
Then Trigger Settings
Then Trig Delay
Enter a value using the numeric keypad, the ▲|▼ arrows, or the rotary knob.
Then select a multiplier key or press Enter. Learn about multiplier
abbreviations on page 19.
Trigger Level
Used with Video triggering, an incoming signal with this amplitude or higher (for
positive slope) will initiate a sweep. The Units depend on the Scale Type setting:
(Log or Linear). Learn more on page 74.
The Video Trigger Level is a time domain (Zero Span) signal level comparison.
Therefore, the sweep will trigger close to the displayed level in Zero Span
measurements. In frequency span measurements, processing can cause
broadband signal energy to display at lower power levels than the originating
time domain signal. Therefore, you may need to set the trigger level higher than
the displayed level.
Press Sweep 3
Then Trigger Settings
Then Trig Level
Enter a value using the numeric keypad, the ▲|▼ arrows, or the rotary knob.
Then select a multiplier key or press Enter. Learn about multiplier
abbreviations on page 19.
Auto Trigger Time
If an External or Video trigger signal is not received before the specified Auto
Trig Time, a sweep will occur automatically.
Enter 0 to set Auto Trigger OFF. When Auto Trigger is OFF, the FieldFox does
NOT sweep unless a valid External or Video trigger signal is received.
Press Sweep 3
Then Trigger Settings
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