R&S FSW Series, Руководство пользователя

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Common Measurement Settings
R&S
®
FSW
478 User Manual 1173.9411.02 ─ 43
Example:
In the following example, the second possible trigger event on the rising edge is
ignored as the signal does not drop below the hysteresis (threshold) before it reaches
the trigger level again. On the falling edge, however, two trigger events occur as the
signal exceeds the hysteresis before it falls to the trigger level the second time.
Trigger level
T
T
T
Trigger
hysteresis
T
Trigger on rising edge
Trigger on falling edge
Figure 8-26: Effects of the trigger hysteresis
See "Hysteresis" on page 485
Trigger Drop-Out Time
If a modulated signal is instable and produces occasional "drop-outs" during a burst,
you can define a minimum duration that the input signal must stay below the trigger
level before triggering again. This is called the "drop-out" time. Defining a dropout time
helps you stabilize triggering when the analyzer is triggering on undesired events.
T
Drop-Out
T T
Figure 8-27: Effect of the trigger drop-out time
See "Drop-Out Time" on page 485.
Trigger and Gate Configuration