Ametek 7124 Instruction Manual page 97

The Curve Trigger menu is used to control how trigger inputs affect the curve buffer,
and the position and polarity of the trigger output.
ACQUISITION TRIGGER
The acquisition trigger is a "per curve" (start) or "per point" (sample) trigger
detecting the signal at the TRIG IN connector on the rear panel of the main console,
as follows:
INTERNAL
The curve buffer acquisition is not affected by input triggers
EXT PER CURVE
Acquisition starts on detection of a rising edge on the TTL trigger signal. It
continues until the stop trigger condition is satisfied; each data point is taken at
the buffer time per point setting.
EXT PER POINT
Acquisition starts on detection of a rising edge on the TTL trigger signal, with
each data point requiring a new trigger. It continues until the stop trigger
condition is satisfied; the buffer time per point setting has no effect.
EXT PER CURVE
Acquisition starts on detection of a falling edge on the TTL trigger signal. It
continues until the stop trigger condition is satisfied; each data point is taken at
the buffer time per point setting.
EXT PER POINT
Acquisition starts on detection of a falling edge on the TTL trigger signal, with
each data point requiring a new trigger. It continues until the stop trigger
condition is satisfied; the buffer time per point setting has no effect.
STOP TRIGGER
This control sets the condition used to terminate acquisition into the curve buffer, as
follows:
INTERNAL
The curve buffer acquisition continues until stopped manually from the front
panel or via an HC (halt curve) computer command
Chapter 5, FRONT PANEL OPERATION
Figure 5-33, Curve Trigger Menu
5-43