Hioki MR8827, Instruction Manual

Page: 349 / 436

344
External I/O
17.2.5 External Trigger Terminal (EXT.TRIG)
You can input external signals as trigger sources. This feature allows multiple instruments to be controlled
for parallel synchronous operation.
Signal Input Procedure
1
Connect the cables for the corresponding external input signals to the EXT.TRIG and GND
terminals.
Refer to “17.1 Connect to External Control Terminals” (p. 337).
2
In the Trigger Settings window, set External trigger to [On] .
3
Press the SYSTEM key to open the [Environment] sheet, and move the cursor to [EXT.
TRIG] .
4
Select whether the trigger event occurs on the rising edge (↑)or falling edge (↓) of the
waveform.
5
Short-circuit the EXT.TRIG
―― ――― ― ―
terminal and GND, or input a HIGH level (3.0 V to 5.0 V) or LOW
level (0 to 0.8 V) pulse wave or rectangular wave to the EXT.TRIG terminal.
A trigger event occurs on the rising or falling edge of the input waveform.
Voltage range High level: 3.0 V to 5.0 V, LOW level: 0 V to 0.8 V
Pulse width HIGH level: 50 ns or greater, LOW level: 50 ns or greater
Maximum input voltage −0.5 V to 7 V
HIGH
3.0 V to 5.0 V
LOW
0 V to 0.8 V
50 ns or greater
50 ns or greater
GND
150 pF
100 Ω
3.3 kΩ
5 V
EXT. TRIG
[
↑
]
[
↑
]:
Rising setting
[
↓
]:
Falling setting
5 V
[
↑
] [
↓
] [
↓
]