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TM-4200GE Hardware
9.3.1Preset Shutter
TABLE 8. Electronic Preset Shutter
| Dual Tap | Single Tap | ||
Shutter Speed | Continuous | Async Mode | Continuous | Async Mode |
Mode (sec) | (sec) | Mode (sec) | (sec) | |
0 | No shutter | No shutter | No shutter | No shutter |
1 | 1/60 | 1/16000 | 1/35 | 1/9000 |
2 | 1/125 | 1/8000 | 1/70 | 1/4500 |
3 | 1/250 | 1/4000 | 1/140 | 1/2250 |
4 | 1/500 | 1/2000 | 1/280 | 1/1120 |
5 | 1/1000 | 1/1000 | 1/560 | 1/560 |
6 | 1/2000 | 1/500 | 1/1120 | 1/280 |
7 | 1/4000 | 1/250 | 1/2250 | 1/140 |
8 | 1/8000 | 1/125 | 1/4500 | 1/70 |
9 | 1/16000 | PWC | 1/9000 | PWC |
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9.3.2Programmable Exposure-Continuous Mode
The exposure time of
Exposure Time= | { | (n+1) *32.5 μs+25.6μs | Dual Tap |
| (n+1) *58.1 μs+25.6μs | Single Tap |
When n=0, the exposure time is the minimum exposure time. It is equal to:
Minimum Exposure Time= | { | 58.1 μs (1/17000s) | Dual Tap |
| 83.7 μs (1/12000s) | Single Tap |
In this mode the maximum exposure time is equal to the setting for one frame. If the user specified exposure time is longer than the time allowed for one frame, it will be ignored by the camera.
9.3.3Asynchronous No Shutter Mode
In Asynchronous No Shutter Mode, applying the external trigger starts a camera scan reset. The camera finishes the line it is scanning and scans an additional 9 video lines, this charge is sent to the horizontal register.
Because the external trigger is randomly applied, the new image charge may overlap with the previous image. To prevent an existing charge accumulation from interfering with a new image, most users set up the application in a dark area and depend on a strobe light for illumination. From the time the external trigger activates until the transfer gate turns off, about 9.5 video lines are available for integration; if everything is properly configured, the strobe flashes during this time.
