User Manual

14.2 External I/O
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14
Chapter 14 External Control
3 In the Ext Term (external terminal) Settings screen, select a setting for the
[EXT.TRIG]
terminal.
4 Short-circuit the EXT TRIG terminal and GND, or leave the terminals open-cir-
cuited, and input a HIGH level (3.0 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.
Connection examples
Select whether the trigger event occurs o
n
the rising edge of the waveform or the fallin
g
edge.
↑
Occurs on the rising edge.
↓
Occurs on the falling edge(default setting).
(To open the screen: Press the DISP key→ Press the F7 [System] key→
Select with the SUB MENU keys →Ext Term Settings Screen)
Parallel Trigger Synchronization
GND
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
GND
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
EXT.TRIG
TRIG OUT
GND
Master
Slave
Slave
When a trigger event occurs on any of
the connected instruments, it also oc-
curs on the others.
As more instruments are connected,
the difference between trigger timing
on different instruments becomes larg-
er.
Use 1 instrument as the master (moni-
tor triggers). Start measurement simul-
taneously on the other instruments
when a trigger event occurs.
This gives the least difference in trigger
timing between instruments.
Daisy chain configuration
Set all instruments to master.
Parallel synchronization
Set 1 instrument to master, and set the
others to slave.
Set external trigger to [On] for all in-
struments.
Set external trigger to [On] for the
slave instruments only.