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CV-M9 CL
5.3. Input and output circuits
In the following schematic diagrams the input and output circuits for video and timing signals
are shown.
GND
75
Video
Output
800 mV
GND
75
Video
Output
GND
75
Video
Output
800 mV
800 mV
5.3.1. Iris video output
This signal can be used for lens iris control
In Continuous and Reset Continuous Trigger
Mode. The signal is taken from the CCD sensor output
before the gain circuit.
The iris video output is 0.7 Vpp from 75
Ω
.
The signal is without sync.
Fig. 4. Iris video output.
5.3.2. Trigger input
With TI=1, the trigger input is on pin #10 on 12
pin connector. The input is AC coupled. To allow
a long pulse width, the input circuit is a flip flop,
which is toggled by the negative or positive
differentiated spikes caused by the falling or
rising trigger edges.
GND
+5V
15k
TTL
1k
GND
100n
1k
68k
100k
1n
75
Ω
Trig input
pin #10
SW301.2
GND
+5V
15k
TTL
1k
GND
100n
1k
68k
100k
1n
75
Ω
Trig input
pin #10
SW301.2
The trigger polarity can be changed by TP=1.
Trigger input level 4 V
±
2 V. It can be
terminated by SW301.2: ON for 75
Ω
. OFF for TTL.
The trigger inputs can be changed to
Camera Link. (TI=0 for CL)
Fig. 5. Trigger input.
5.3.3. EEN output
GND
+5V
2
2
10k
2k2
75
TTL
100
Pin #9
XEEN
output
GND
+5V
2
2
10k
2k2
75
TTL
100
Pin #9
XEEN
output
XEEN is found on pin #9 on 12 pin HR connector.
The output circuit is 75
Ω
complementary emitter
followers. It will deliver a full 5 volt signal.
Output level
≥
4 V from 75
Ω
. (No termination).
XEEN is low during exposure.
EEN is found in Camera Link. It is high during
exposure.
Fig. 6. EEN output
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