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Pelco Manual C1937M-C (4/03)
SWITCH SETTINGS
Figure 6. DIP Switch Default Settings
OFF
OFF
OFF
OFF
AIV
INT
NOR
OFF
OFF
AW1
BLC
AGC
OPT
ESC
AID
LL
SHP
LC
EDR
AW2
ON
PHASE LEVEL
+-
HL
1
2
3
4
5
6
7
8
9
10
20157
1 BLC - Back Light Compensation
OFF (Default setting) - Disables the BLC mode.
BLC - Enables the BLC mode. If a bright backlight is present, the objects in the picture may appear
dark or as a silhouette. BLC enhances objects in the center of the picture, and can be used to
improve picture quality; in a fixed scene.
2 AGC - Automatic Gain Control
OFF - Disables the AGC mode.
AGC (Default setting) - Enables the AGC mode. Automatically adjusts the image to compensate
for changes in light levels. Most scenes benefit from AGC operation.
3 OPT - Optima
OFF (Default setting)
OPT - Boosts the video by 3 dB. Only use if your video signal appears weak on your monitor.
4 ESC - Electronic Shutter Control
OFF - Disables the ESC mode.
ESC (Default setting) - Enables the ESC mode. The ESC function automatically changes the sensi-
tivity of the camera by varying the electronic shutter speed according to the amount of incident light.
Electronic shutter speed range is 1/60 to 1/100,000. Should only be used with an AID or manual iris
lenses. Do not use with an AIV type lens.
5 AIV/AID - Auto Iris Lens Mode Selector
The switch setting is determined by the type of lens used:
AIV - Video controlled Auto Iris lens. Disable the ESC mode when using an AIV type lens.
AID (Default setting) - DC controlled Auto Iris lens.
6 INT/LL - Internal/Line Lock
Line Lock (LL) (Default setting) - Locks the vertical frame to the power supply frequency.
Eliminates vertical roll caused by multiple cameras connected to the same switching device.
Internal - Locks the vertical frame to the internal oscillator. Use with DC or unstable AC.
NOTE: If DC power is applied when the INT/LL switch is in the LL position, the camera will not
function. Switch the mode to INT.
Note: White indicates
switch setting.
NOTE: Under most conditions, no setting of switches will be required. Please read the details of each
switch before making any adjustments.