R&S
®
ZVA/ZVB/ZVT Channel Menu
1145.1084.12 4.147 E-6
Free Run
In Free Run mode a new measurement is started immediately without waiting for a trigger event and
without fixed time reference. The Trigger Settings are not valid.
Free Run means that a measurement in Continuous Sweep mode is repeated as fast as possible.
Remote control:
T
RIGger[:SEQuence]:SOURce IMMediate
External Trigger
In External trigger mode the measurement is triggered by a low-voltage (3.3 V) external TTL signal
applied either to the BNC connector EXT TRIGGER or to pin 2 of the USER CONTROL connector at
the rear panel. The two trigger inputs are equivalent; nor additional setting for signal routing is required.
Selecting External opens a dialog to select whether the rising or the falling edge of the external trigger
signal provides the trigger event.
The period of the external trigger signal should be adjusted to the triggered measurement
sequence. If the analyzer receives a trigger event while the last sequence is still running, the
trigger event is skipped and a message Trigger event missed is displayed.
Remote control:
TRIGger[:SEQuence]:SOURce EXTernal
TRIGger[:SEQuence]:SLOPe
Periodic Trigger
In Periodic trigger mode the measurement is triggered by the periodic signal of an internal clock
generator. Selecting Periodic opens the numeric entry bar to select the trigger period.
The minimum trigger period that can be set corresponds to the estimated duration of the triggered
measurement sequence.
Time sweep
The periodic trigger is incompatible with Time sweeps: If a Time sweep is selected while the periodic
trigger is active, the analyzer generates an error message:
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