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14-1
IM 701210-06E
External Trigger I/O, External Clock Input, and
Video Signal Output
14
Chapter 14
External Trigger I/O, External Clock Input, and Video Signal Output
14.1 External Trigger Input (TRIG IN)
CAUTION
Only input signals that meet the specifications below. Otherwise, undesirable
signal such as excessive voltage may damage the DL750/DL750P.
External Trigger Input Terminal
TRIG IN
This terminal is used when an external signal is used as a trigger source (see section
5.6).
Specifications
Connector type:
RCA jack
Input Level:
TTL (0 to 5 V)
Minimum pulse width:
500 ns
Logic:
Rising edge or falling edge
Trigger delay time:
Within (200 ns + 1 sample period)
Externally synchronized operation: Possible (by connecting TRIG IN and TRIG OUT on
two DL750/DL750Ps)
External Trigger Input Circuit Diagram and Timing Chart
LCX14 or
equivalent
100
Ω
4.7 k
Ω
100 pF
+5 V
Minimum pulse
width
Trigger delay time
TRIG IN
(when set to )
Internal trigger
Note
By using the trigger output function, the operation of two DL750/DL750Ps can be
synchronized.
TRIG
OUT
No.1
TRIG
IN
No.2
DL750/
DL750P
FILE
SHIFT
HELP
MISC
NUM KEY
PROTECT
VOICE
MEMO
IMAGE
SAVE
ESC
MEASURE CURSOR
RESET
SELECT
CH
ALL CH
MODE
POSITION
SIMPLE/ENHANCED
ACQ
START/STOP
SETUP
DISPLAY
ZOOM
DUAL
CAPTURE
HISTORY
MATH
1
CH
2
CH
3
CH
4
CH
5
CH
6
CH
7
CH
8
CH
9
CH
10
CH
11
CH
12
CH
13
CH
14
CH
15
CH
16
DELAY
MANUAL TRIG
SNAPSHOT
CLEAR TRACE
MENU
MENU
V/DIV
TIME/DIV
TRIGGER
TRIG D
VERTICAL
HORIZONTAL
CAL
X-Y
SEARCH
7
DSP 1
8
9
DSP 2
6
5
4
1
0
2
3
ENTER
m
DSP 6
DSP 5
LOGIC A
LOGIC B
EVENT
DSP 3
DSP 4
EXP
DL750/
DL750P
FILE
SHIFT
HELP
MISC
NUM KEY
PROTECT
VOICE
MEMO
IMAGE
SAVE
ESC
MEASURE CURSOR
RESET
SELECT
CH
ALL CH
MODE
POSITION
SIMPLE/ENHANCED
ACQ
START/STOP
SETUP
DISPLAY
ZOOM
DUAL
CAPTURE
HISTORY
MATH
1
CH
2
CH
3
CH
4
CH
5
CH
6
CH
7
CH
8
CH
9
CH
10
CH
11
CH
12
CH
13
CH
14
CH
15
CH
16
DELAY
MANUAL TRIG
SNAPSHOT
CLEAR TRACE
MENU
MENU
V/DIV
TIME/DIV
TRIGGER
TRIG D
VERTICAL
HORIZONTAL
CAL
X-Y
SEARCH
7
DSP 1
8
9
DSP 2
6
5
4
1
0
2
3
ENTER
m
DSP 6
DSP 5
LOGIC A
LOGIC B
EVENT
DSP 3
DSP 4
EXP