Rohde & Schwarz FPL1000 Series, Руководство пользователя

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The Spectrum Application (RF Measurements)
R&S
®
FPL1000
407 User Manual 1178.3370.02 ─ 03
Example:
In the following example, the second possible trigger event is ignored as the signal
does not exceed the hysteresis (threshold) before it reaches the trigger level again on
the rising edge. 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
Figure 7-38: Effects of the trigger hysteresis
See " Hysteresis " on page 412
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 7-39: Effect of the trigger drop-out time
See " Drop-Out Time " on page 412.
Trigger and Gate Configuration