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)

Basic Functions

•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.

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)

1

1

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.

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