R&S RTA4000, Руководство пользователя

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Trigger
R&S
®
RTA4000
80 User Manual 1335.7898.02 ─ 08
1 = adjust the trigger source
2 = open the keypad to enter the value of the trigger level or threshold
3 = adjust slope or polarity
4 = adjust the trigger mode
5 = start or stop a continuous acquisition, or start a single acquisition if [Single] is active
6 = available settings depend on the trigger type
6.3 General trigger settings
General trigger settings are independent of the trigger type. They are highlighted in the
above figure and described in the current section. The other trigger settings are spe-
cific for individual trigger types, and they are described in the following sections.
Trigger Mode
Toggles the trigger mode between "Auto" and "Norm". The trigger mode determines the
behavior of the instrument if no trigger occurs. The current setting is shown in the infor-
mation bar.
"Auto" The instrument triggers repeatedly after a time interval if the trigger
conditions are not fulfilled. If a real trigger occurs, it takes prece-
dence. This mode helps to see the waveform even before the trigger
is set. The waveform on the screen is not synchronized, and succes-
sive waveforms are not triggered at the same point of the waveform.
"Norm" The instrument acquires a normal waveform only, if a trigger occurs,
that is, if all trigger conditions are fulfilled. If no trigger occurs, no
waveform is acquired and the last acquired waveform is displayed. If
no waveform was captured before, nothing is displayed.
Remote command:
TRIGger:A:MODE
on page 460
Trigger Type
Selects the trigger type.
"Edge" Triggers on signal edges.
See
Chapter 6.4, "Edge trigger" , on page 82.
General trigger settings