DVC DigitEyes Series, Technical Manual, Page: 49 / 66

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8.3.12.3 Video Board Adjustments
1) BLACK BALANCE ADJUSTMENT: Cap the lens and adjust the Black Balance 1 and Black
Balance 2 potentiometers till the vertical fixed pattern noise disappears.
2) WHITE BALANCE ADJUSTMENT: Open the lens and point the camera towards a diffused,
uniform field of light (make sure that the camera is not close to saturation). Adjust the White
Balance 1 and White Balance 2 potentiometers till the vertical fixed pattern noise disappears.
3) Repeat (1) and (2) in succession till the picture is free from vertical stripes in both situations.
4) GAIN / OFFSET ADJUSTMENT: S3 is a three position switch; the middle position is not used.
Setting S3 to the full CCW position selects the AGC mode; setting S3 to the full CW selects the
Manual Gain mode.
Adjust Analog gain, Digital gain and Digital Offset potentiometers if desired.
NOTE: THIS SHOULD NOT BE ATTEMPTED WITHOUT USING A CALIBRATED LIGHT
SOURCE AND CALIBRATED OPTICS !
5) INTERLACE ADJUSTMENT: Focus the camera on a suitable target (containing diagonal
lines) with approximately 50% video output. Setting S2 (a three position switch) to the full CCW
position will create a non-interlaced image (diagonal lines appear jagged, vertical resolution is
halved). Setting S2 to the full CW position will create an interlaced image (diagonal lines appear
straight, full vertical resolution is obtained). The middle position of S2 is not used.
6) GAMMA SETTING: S1 is a three position switch; the middle position is not used. Setting S1
to the full CCW position sets Gamma = 0.45; setting S1 to the full CW position sets Gamma =
1.0
CCD
BNC
CONN.
R140
R159
WHITE
BALANCE
TWO
GAMMA
SELECT
SWITCH
INTERLACE
SELECT
SWITCH
S2
R120
DIGITAL
OFFSET GAIN
R161 R170
BLACK BALANCE
TWO ONE
R171
WHITE
BALANCE
ONE
R19 R15
ANALOG VIDEO
AGC GAIN OFFSET
R125
S3
S1
GAIN
SELECT
SWITCH
Figure 8-2: Video Board Adjustments