5-2
IM DL850-03EN
5.2 Trigger Output (TRIGGER OUT)
CAUTION
Do not short the TRIG OUT terminal or apply external voltage to it. Doing so may damage the
instrument.
External Trigger Output Terminal
TRIGGER
IN
OUT
When a trigger occurs, the DL850/DL850V produces a CMOS level signal. You can set the output
mode to normal or pulse. The signal level is normally high. It becomes low when a trigger occurs.
Item
Specifications
Connector type
BNC
Output level
CMOS level (0 to 5 V)
Output formats
Normal mode and pulse mode
Logic
Normal mode
Low when a trigger occurs and high after acquisition is
completed
Pulse mode
Low when a trigger occurs and high after a specified period
of time has passed.
Output delay
Normal mode
Within 100 ns + 1 sample period
Pulse mode
Within 100 ns + 1 sample period
Output hold time
Normal mode
100 ns or more
Pulse mode
1 ms, 50 ms, 100 ms, or 500 ms
Circuit Diagram and Timing Chart for Trigger Output
EXT TRIG OUT
100 Ω
Equivalent to HC245
Trigger occurrence
(the time at the trigger position)
Trigger output
Internal trigger
Output hold time
Output delay
• Normal mode
Trigger occurrence
(the time at the trigger position)
Trigger output
Internal trigger
Output hold time
Output delay
• Pulse mode
Low Level and High Level Hold Times (In normal mode)
H
L
Trigger output
Post-trigger time
Trigger occurrence
Trigger occurrence
Pre
Post
Post
Pre
Waveform acquisition
Trigger
Trigger