14-2
IM 701240-01E
14.2 Trigger Output (TRIG OUT)
CAUTION
Do not short the TRIG OUT terminal or apply external voltage to it. Doing so may
damage the SL1400.
External Trigger Output Terminal
TRIG OUT/
EXT CLK IN
A TTL level signal is output when a trigger is activated. The signal level is normally high
and goes low when a trigger is activated.
Specifications
Connector type:
RCA jack
Output level:
CMOS level (0 to 5 V)
Logic:
Falls when the trigger is activated, rises after completing acquisition
Output delay time:
Within (1
µ
s + 1 sample period)
Output hold time:
200 ns or more
Trigger Output Circuit Diagram and Timing Chart
LCX14 or equivalent
EXT TRIG OUT
EXT CLK IN
100
Ω
+5 V
HC245 or equivalent
4.7 k
Ω
100 pF
Trigger occurrence (time of trigger position)
Trigger Output
Internal trigger
Output hold time
Output delay time
Low Level/High Level Hold Time
H
L
Trigger Output
Post time
Trigger occurrence
Trigger occurrence
Pre-trigger
Post-trigger
Post-trigger
Pre-trigger
Waveform
acquisition
Trigger
Trigger