XX151-02-00 Rev 1206 Surveyor4A Fixed-Position Camera Dome
Installation
•
7
Figure 4
Power Connections
Camera Synchronization
If there is more than one unit in a system, the cameras have to be synchronized to ensure there is no roll of
video. If the camera will be used in a line lock video application, the camera interface board is already set in
line lock mode by default. Camera synchronization is DIP switch selectable, line locked or internal. The use of
line-locking synchronization using a V-phase potentiometer (pot) is typically included in video equipment
requiring external video synchronization. As an example, equipment like a video switcher unit uses the
camera’s line lock to reduce “video jump” on its monitor during camera switching. The adjustment for the line
lock V-phase (VR1) is on the bottom board of the camera. The V-phase pot allows video to power line phase
adjustment up to 180
°
. If more than 180
°
of adjustment is required, swap the lines attached to the 24 VAC
terminal block connector. Be sure that the selector DIP switch is set to position “LL” shown in Figure 6. Note
that the performance of the camera’s line lock depends on the quality of the power source. If the camera
experiences roll or jitter due to the quality of the power source, then it is best to set the camera to internal
“crystal” mode. This is done by setting the selector switch to “INT.” as shown in Figure 6.
Camera/Lens Adjustments
After all cabling is complete, the camera and lens can be adjusted.
Switch Settings
There is a DIP switch on the front camera board that allows the selection of: Switch 1 - ALC (OFF) or ELC
(ON); Switch 2 – Internal (Crystal) Synchronization (ON) or Line Lock (OFF); Switch 3 – AGC (ON or OFF);
Switch 4 – BLC (ON or OFF). ALC setting is for external autoiris and ELC setting is for internal autoiris. Refer
to Figure 5 for the location and Figure 6 for setting of the switches. To obtain the sharpest picture possible,
the iris adjustment should be made from a “full bright” setting down to an acceptable video level. This assures
that the internal AGC of the camera is not operational. The day/night camera includes a switch (located on
the bottom board) to select having the day/night feature turned ON or OFF. If day/night is turned ON, at a low
light level the camera changes to monochrome mode and the resolution and sensitivity increase. See Table 3
for camera and lens specifications.
Summary of Contents for SURVEYOR4A
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