ITech IT8731 - External Trigger Connections

Panel function introduction
Copyright © Itech Electronic Co., Ltd. 32
Figure 3-5 IT8700 rear panel 8-pin control connector (take example of IT8702)
No.
Pin
Description
1
Trigger IN
trigger signal input
2
Trigger OUT
trigger signal output
3
On/Off Control
synchronization ON/OFF control signal input
4
On/Off Status
synchronization ON/OFF signal output
5
NC
-
6
NC
-
7
GND
Ground
8
GND
Ground
3.4.1 External trigger connections
There’re five kinds of trigger mode:
⚫ front panel TRIG trigger mode
⚫ rear panel trigger mode
⚫ BUS trigger mode
⚫ Timer trigger mode
⚫ trigger HOLD mode
Front panel TRIG trigger mode
When select front panel trigger mode, first set the trigger source as MANUAL,
press to start panel trigger mode.
Rear panel trigger mode
When select rear panel trigger mode, first set the trigger source as EXTERNAL,
trigger signal input from the 1
st
pin of 8-pin terminal on the rear panel.
When select external trigger mode, the 1
st
and 8
th
send out trigger signal (low
pulse is effective), e.g. refer to the below connection figure:
The figure just show one way to produce trigger signal. When press the button,
it produce a trigger to change setting value (voltage, current, resistance, etc.),
e.g. switch in transient mode, or create pulse in dynamic pulse mode. At the
same time, it can output trigger signal in pin 2.
BUS trigger mode
When select bus trigger mode, first set the trigger source as BUS, connect the
electronic load by GPIB or USB communication interface, then if get the *TRG
command, the load will produce a trigger signal.
TrigTrig