Pulse Width Control Trigger Mode - IAI CV-M40 Operating Manual

6.3.3. Pulse Width Control Trigger Mode

This trigger mode can operate in H reset mode or H non-reset mode.
In H reset mode the trigger falling edge will immediately reset the internal H and start the
exposure. The exposure will end at the rising edge of the trigger, and the resulting video will be
read out. WEN will indicate the start of video read out.
In H-non-reset mode, where a continuous external HD is input, the exposure will start at the
first HD pulse after the falling edge of the trigger. The exposure stops at the trigger rising edge.
To avoid up to 1H time jitter it is recommended to synchronize the trigger to HD. The falling
edge of the trigger should be within 4.4 µsec. from the falling edge of the ext. HD. (See fig. 8.).
The resulting video signal will start to be read out after the trigger rising edge. The WEN pulse
indicates the start of valid video signal.
The trigger pulse width can be up to 2 second. Here the dark signal noise will be visible.
A new trigger pulse must not be applied before the video read out has been finished. (WEN
negative goes high). For partial scanning, refer to fig. 18.
For settings refer to chapter "7. Configuring the camera."
Refer to timing charts for details.
To use this mode:
Set: Rear switch SW1-5 OFF, SW1-6 ON for Pulse. For RS-232C select Pulse Width
Control.
Other functions.
Input: For H reset:
For H non-reset:
Note: For H non-reset the external HD should be input continuously.
Refer to fig. 29. for correct jumper setting and pin connections.
CV-M40
External trigger to pin #5/6. >2H
(JP5 short, JP11 short)
[JP10 short for trigger 75Ω termination.]
External trigger to pin #5/6. >2H
External HD to pin #6/12
(JP20 short, JP5 open, JP9 short)
(JP21 short, JP11short)
[JP8 short for trigger 75Ω termination.]
[JP10 short for HD 75Ω termination.]
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