Olympus EPOCH 650, User Manual, Page: 150 / 362

DMTA-10055-01EN, Rev. A, February 2015
Chapter 8 138
8.3 Trigger Inputs and Outputs
The EPOCH 650 trigger synchronization capability allows the instrument to be used
with other devices or instruments. The trigger governs the timing of each instrument
pulse based on the chosen mode and, where applicable, external input. Trigger
synchronization is supported as either a trigger input or trigger output on a combined
signal through the Digital Out connector (see Table 23 on page 305). The trigger
modes are as follows:
• Internal
This is the standard operational mode that internally controls the pulse timing
and frequency. When set to the internal mode, the EPOCH 650 outputs a
synchronization pulse that is identical in rate and timing to the pulse it is sending
to the transducer connectors.
• External
This mode allows an external device to control the pulse timing and frequency of
the EPOCH 650 via the RXD pin located on the Digital Out connector (see
“EPOCH 650 15-pin digital port output” on page 305). When no external input
pulse is present on the RXD pin, no pulse is sent to the connected transducer(s),
and the EPOCH 650 appears to be nonresponsive.
• Single
This mode allows you to manually control the instrument pulse timing and
frequency. You can also control the instrument via computer commands.
To use the trigger input and output
1. Choose the Meas Setup > Special (group 3/5) menu, and select Trigger Mode .
2. Adjust the trigger mode to the desired setting.
When in
Single mode, the EPOCH 650 does not send a pulse to the connected
transducer(s) until the Check key ( ) is pressed (or through remote commands
via the Digital Out or USB connector). If ( ) is not pressed, or no remote
command is sent, the instrument appears to be nonresponsive.
You cannot simultaneously control both a trigger input and output.