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8
Functions
XCD-SX910CR/X710CR
XCD-SX910UV
XCD-SX910/X710
Functions
Brightness
This camera supports brightness control. This makes
fine adjustment of the black level possible. (The
former model, XCD-SX910/X710 (firmware version
1.07) does not support brightness control.)
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 (XCD-SX910UV
*
/
SX910
*
/X710
*
), and the unit is designed so that the
gain can be subdivided and set to any of 640 steps.
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 XCD-SX910CR/SX910UV/SX910 and XCD-
X710CR/X710 are not compatible with the XCD-
SX900 and XCD-X700 in Gain settings.
*: 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 XCD-SX910UV/SX910/X710.
Shutter
This camera allows both Manual and Auto Shutter
setting.
The variable range extends from 10 microseconds to
17.5 seconds; relative control values are indicated by a
12-bit integer, and absolute control values are
indicated using a 32-bit floating point value.
The shutter settings for the XCD-SX910CR/
SX910UV/SX910 and XCD-X710CR/X710 are the
same, but these settings differ from some of those for
the XCD-SX900 or XCD-X700.
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
P
2
E =
1000000
P > 1000 ~ P <= 1150
E = (P – 1000)
*
0.1 + 1
Setting examples
3 (003h) : 9
µ
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
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.
16 s
1 s
10 µs
31000
1
2
1150
1
2