User Manual – Rev BE AMETEK Programmable Power
MX Series 174
4.6.3 Triggering Measurements
Both FFT results and waveform acquisitions may have to be positioned at a
specific moment in time. To allow the data acquisition to coincide with user
specified events, the measurement system can be triggered in different ways.
Trigger modes are available from both the bus and the front panel. If one of the
remote-control interfaces is used, acquisitions may also be triggered from the
transient list system. Refer to the programming manual for details on this mode
of operation.
4.6.3.1 Trigger mode
The following trigger modes are supported by the MX Series 3Pi controller:
Single (SINGLE) This mode causes the acquisition system to be armed
only once. The MX source waits for the user to press
the ENTER key while on the START field. As soon as the
trigger event specified occurs, data is acquired, and the
acquisition system is put in an idle state. A new user
initiated START event must be given to trigger a new
acquisition.
This mode is appropriate for capturing events that
occur only once such as the inrush current when
turning on a load.
Continuous (CONT) This mode causes the trigger system to re-arm itself
after each trigger event. Every time a new trigger event
occurs, new data is acquired, and the LCD display is
updated. No user intervention is required after the
initial START event.
This mode is appropriate for capturing repetitive events
or to monitor the source output continuously. Display
updates will occur about once per second.
4.6.3.2 Trigger source
The MX Series 3Pi controller offers a choice of trigger sources in front panel
operation mode. The following trigger sources are available from the
HARMONICS/TRACE ANALYSIS, TRIG SOURCE field:
Immediate (IMM) This mode causes a trigger to occur as soon as the
ENTER key is pressed with the cursor on the START
field. No trigger source needs to be specified for this
trigger mode. This mode is equivalent to the
INIT:IMM:ACQ bus command.
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