Frame Delay Read Out Mode - IAI CV-M40 Operating Manual

6.3.4. Frame delay read out Mode.

The trigger falling edge will start the selected exposure as for edge pre-select. The trigger
raising edge will start the resulting frame to be read out.
This mode allows simultaneous capture of multiple cameras using a common external trigger
pulse and sequential multiplexed read out to a single input frame grabber.
This trigger mode can operate in H reset mode or H non-reset mode.
In H reset mode the falling edge of the trigger will immediately reset the internal HD and start
the exposure. In H non-reset mode, where an external HD should be input, the exposure will
start at the first HD after the trigger. The shutter time can be selected in 8 steps, 1/125 to
1/12,000 sec. Via RS232C in 9 steps, 1/60 (Off) to 1/120,000. Programmable shutter from 2H to
524H (Off). Binning or partial scan can be used, but not together.
To avoid up to 1H time jitter in H non-reset, 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.).
When the trigger signal rise, the resulting video signal will be read out.
The WEN pulse indicates the start of valid video signal. Refer to timing charts for details. 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. 21.
The trigger pulse width should be >3H longer than the pre-selected exposure time.
The maxim trigger pulse width (or delay) should be <2 seconds. Here the dark signal noise will
be visible.
For settings refer to chapter "7. Configuring the camera."
Refer to timing charts for details.
To use this mode
Set: Rear switch SW1-5 ON, SW1-6 ON for Frame. For RS-232C select Frame delay
readout.
SW1-1 through SW1-3 on rear or RS-232C for shutter speed.
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.
Avoid highlighted scene areas during the delay period.
CV-M40
External trigger to pin #5/6. >3H
(JP5 short, JP11 short)
[JP10 short for trigger 75Ω termination.]
External trigger to pin #5/6. >3H
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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