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8
Basic Functions
White Balance
White Balance has the following modes, all of which
can be set using VISCA Commands.
• Auto White Balance
Auto white balance obtains the proper color
reproduction by automatically adjusting white
balance to ensure a white object always looks white.
This function computes the white balance value
output using color information from the entire screen.
It outputs the proper value using a pre-set value for a
color temperature radiating from a black subject
based on a rage of values from 2000 to 10000K.
This mode is the default setting.
Note
When the light source suddenly changes from the light
source available when the FCB camera was turned on, the
proper color reproduction may not be obtained because the
system cannot compensate the sudden change of color
temperature.
• ATW
Auto Tracing White balance (2000 to 10000 K)
• Indoor
3200 K Base Mode
• Outdoor
5800 K Base Mode
• One Push WB
The One Push White Balance mode is a fixed white
balance mode that may be automatically readjusted
only at the request of the user (One Push Trigger),
assuming that a white subject, in correct lighting
conditions and occupying more than
1
/2 of the image,
is submitted to the camera.
One Push White Balance data is lost when the power
is turned off. If the power is turned off, reset the One
Push White Balance.
• Manual WB
Manual control of R and B gain, 256 steps each
Automatic Exposure Mode
The variety of AE functions, which allow video signal
to output the optimum image for subjects from low
light conditions to bright light conditions, are
available.
• Full Auto
Auto Iris and Gain, Fixed Shutter Speed (
1
/30 s)
• Shutter Priority
Variable Shutter Speed, Auto Iris and Gain
(
1
/1 to
1
/10,000 s, 22 steps, std. shutter: 16 steps, slow
shutter: 6 steps)
• Iris Priority
Variable Iris (F1.8 to Close, 18 steps), Auto Gain and
Shutter speed.
• Manual
Variable Shutter, Iris and Gain.
• Bright
Variable Iris and Gain (Close to F2.0, 17 steps at
0 dB: F1.8, 15 steps from 0 to 28 dB)
AE – Shutter Priority
The shutter speed can be set freely by the user to a
total of 22 steps – 16 high speeds and 6 low speeds.
When the slow shutter is set, the speed can be
1
/30,
1
/15,
1
/8, or
1
/4 s. The picture output is read at a normal
rate from the memory. The memory is updated at a low
rate from the CCD. AF capability is low.
In high speed mode, the shutter speed can be set up to
1
/10,000 s. The iris and gain are set automatically,
according to the brightness of the subject.
a) For AE-Manual only.
Note
When the shutter speed 1/1 s or 1/2 s is used, Auto Focus
and White Balance may not function fully.
Data 30fps 25fps
15 10000 10000
14 6000 6000
13 4000 3500
12 3000 2500
11 2000 1750
10 1500 1250
0F 1000 1000
0E 725 600
0D 500 425
0C 350 300
0B 250 215
0A 180 150
09 125 120
08 100 100
07 90 75
06 60 50
05 30 25
04 15 12
03 8 6
02 4 3
01 2 2
00
a)
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