CV-A1-20
6.7. Frame-delay read out Mode
In this mode the exposure starts from the leading edge of the trigger pulse. It stops at the
trailing edge of the trigger pulse. The accumulation can be either H synchronous or H
asynchronous. HC=0 or HC=1. In H synchronous mode the accumulation starts at the first HD
pulse after the leading edge of the trigger. In H asynchronous mode the accumulation starts
immediately after the leading edge of the trigger. (The internal H is not reset.) The resulting
video is read out after an external VD pulse is applied. This mode will operate with full and
partial scanning and with all binning modes. Partial scanning together with binning will work,
but it is not described, and no timing diagrams are documented.
An EEN pulse will indicate the active accumulation time, and a WEN pulse indicates that the
resulting video is being read out.
To use this mode:
Set function:
Trigger mode “Frame-delay read out”
TR = 3
“H accumulation”
HC=0 or HC=1
Polarity and other functions
Input:
Ext. trigger to pin 5 on 6 pin connector (or pin 11 on 12-pin connector).
Ext. VD to pin 7 on 12-pin connector.
Ext. HD to pin 6 on12-pin connector. (If used).
Important notes on using this mode.
•
With HC=0 the start of exposure will start synchronized to the internal H signal, the start
of exposure may be shifted max 1H. To avoid this shift (jitter), synchronize the camera to
an external HD and make sure that the trigger pulse aligns to the HD as shown in fig. 17.
•
With HC=1 the exposure will start immediately. Refer to fig. 18 and fig. 19.
•
The duration of the trigger can be>1H to<2000H.
•
A new trigger must not be applied before WEN is high.
•
In trigger modes there are no continuous VD out, only after each trigger input.
1H = 83.6
µ
s
No equalize and serration pulses.
Table showing the figures for the different modes.
Binning
A
(CCD array line #)
B
Normal
4 to 1038
1035H
H
4 to 1038
1035H
V
18 to 1019
501H
V+H
18 to 1019
501H
Fig. 22. Frame Delay read out mode
- 13 -
