CV-A1
6.10. Smearless Mode
This mode will reduce the unwanted smear signal from a highlighted scene when a short exposure time is used. The trigger mode is like edge
The trigger leading edge will start the dummy readout. It takes 54 H before the exposure starts. The exposure stops and the resulting video signal is read out after the selected shutter time. It can be the 16 step normal or 1023 step programmable. SM=0 or SM=1.
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 will be 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 “Smearless read out” | TR = 6 |
| Shutter mode “Normal” or “Programmable” | SM=0, SM=1 |
| “Shutter Speed” | SH=0 through 9 |
| “Programmable exposure” | PE=1 through 1023 |
| Polarity and other functions |
|
Input: | Ext. trigger to pin 5 on 6 pin connector (or pin 11 on | |
| Ext. HD to pin 6 |
|
Important notes on using this mode.
•The start of exposure will start synchronized to the internal H signal. The start may be shifted max 1H. To avoid this shift (1 H jitter), synchronize the camera to an external HD and make sure that the trigger pulse aligns to the HD as shown in fig. 17.
•The duration of the trigger should 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.
No equalize and serration pulses.
| A | B | C | D | E | Max frame rate | Remarks |
Scan mode |
|
| CCD array line # | Effective video |
| fps |
|
Full | 10H | 14H | 4 to 1038 | 1035H | 18H | 15 |
|
1/2 Partial | 17H | 33H | 271 to 783 | 513H | 25H | 26 |
|
1/3 Partial | 17H | 33H | 357 to 697 | 341H | 25H | 35 |
|
1/6 Partial | 17H | 33H | 442 to 612 | 171H | 25H | 54 |
|
H binning | 10H | 14H | 4 to 1038 | 1035H | 18H | 15 |
|
V binning | 10H | 14H | 18 to 1019 | 501H | 18H | 28 |
|
V+H binning | 10H | 14H | 18 to 1019 | 501H | 18H | 28 |
|
Fig. 25. Smearless Mode
- 16 -