Functions
Functions
Brightness
This camera supports brightness control. This makes fine adjustment of the black level possible. (The former model,
Gain
Both Manual and Auto Gain setting are available with this camera.
The variable range extends from 0 to 18 dB (XCD- SX910CR/X710CR)/0 to 24 dB
At the factory default setting, the gain is set to 0 dB. When Auto gain is selected, the gain is adjusted automatically, based on the brightness of the subject. At this time, the reference level (target point) is set in the AutoExposure register.
For details on Auto Exposure, see page 9.
The
*: If you set the gain to +18 dB or higher, the S/N ratio will be severely degraded. Note this characteristic when you use the
Shutter
This camera allows both Manual and Auto Shutter setting.
The variable range extends from 10 microseconds to
17.5seconds; relative control values are indicated by a
The shutter settings for the
The relationship between the parameter and the exposure time is given by the following formulas. Where
P = Parameter (003h ~ 424h) E = Exposure time (s)
P >= 3 ~ P <= 1000
E = | P2 |
| 1 |
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1000000 |
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P > 1000 ~ P <= 1150 |
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E = (P – 1000)*0.1 + 1 |
| 2 | ||||
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Setting examples
3 (003h) : 9 ∝s (1/100000)
32 (020h) : 1 ms (1/1000)
100 (064h) : 10 ms (1/100)
1000 (3E8h) : 1 s
1010 (3F2h) : 2 s
1150 (47Eh) : 16 s
16 s
2
1 s
1
10∝s
3 | 1000 | 1150 |
When Auto Shutter is selected, the exposure time is adjusted automatically, based on the brightness of the subject. At this time, the reference level (target point) is set in the AutoExposure register.
For details on Auto Exposure, see page 9.
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8 | |