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[ 14 ] Pelco Manual C1982M-A (12/00)
CAMERA PHASE ADJUSTMENT
When using one AC power supply in a multi camera system, a brief vertical roll may occur on the
monitor each time a camera view is switched. To eliminate vertical roll, adjust the phase control to
synchronize (line-lock), the cameras to one another. The synchronization switch (DIP switch 10) for
each camera must be set to LL. Use the potentiometer located on the side of the camera to make
adjustments.
It may be necessary to have two people in communication when adjusting the phase of the camera.
One person at the camera and another person at the monitor to observe the vertical roll and the ef-
fect of any adjustments made to the camera.
To synchronize the cameras do the following:
1. Choose a reference camera to which all other cameras will be phased.
2. Select a camera and synchronize it to the reference camera by turning the phase adjustment
control clockwise and/or counterclockwise.
3. Each time an adjustment is made, switch back and forth between the camera you are adjusting
and the reference camera. Repeat this process as many times necessary, until the roll between
the cameras is no longer noticeable.
4. Adjust the phase of all other cameras by repeating steps 2 through 3. Always adjust to the refer-
ence camera selected in step 1.
NOTE: The preferred method for camera phase adjustment is to use a dual trace oscilloscope to
align the vertical sync pulses of the reference camera to the selected camera(s).