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Camera Synchronization
When the V910 is being powered by 24 VAC, camera synchronization is line locked. If there is more than one
unit in a system, the cameras have to be synchronized to ensure there is no disruption of video display. The
use of line-locking synchronization using a V-phase adjustment is 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 pushbutton adjustment for the line
lock V-phase is on the board of the camera. Refer to Figure 7. To make an adjustment, while observing the
video outputs from the cameras on an oscilloscope, press the first camera's V-phase pushbutton until vertical
sync from all cameras are in phase. The V-phase adjustment allows video to power line phase adjustment up
to 180°. If more than 180° of adjustment are required, swap the lines attached to the 24 VAC terminal block
connector. Note that the performance of the camera's line lock depends on the quality of the power source.
Use an oscilloscope to make V-phase adjustments.
Camera/Lens Adjustments
After all cabling is complete, the camera and lens can be adjusted. Refer to Figures 7 and 8.
Switch Settings
There is a DIP switch on the camera board that allows the selection of: AE/ME (iris setting); ATW/AWB (white
balance setting); AGC MAX (Automatic Gain Control ON or OFF); and WDR (Wide Dynamic Range ON or
OFF). The default settings on all cameras are: ME, ATW, AGC ON and WDR ON. ME setting is for DC
autoiris and AE setting is for fixed iris (all the cameras in this series have autoiris). Refer to Figures 7 and 8
for the location and 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. See Table 3 for camera and lens specifications.
Lens/Autoiris Adjustment
The lens can be manually adjusted for focus and zoom. On the lens, focus [Near ∞ (Far)] is the front ring and
the zoom (Telephoto Wide) is the back ring. Refer to Figure 7. To make these adjustments, loosen the Zoom
and Focus lever screws and turn the ring. When adjustment is complete, retighten the screws. Focusing the
lens may be impacted by the smoked lower dome. After the camera/lens assembly is positioned as required,
use the focus ring to adjust the lens to the sharpest focus. Use the lens focus tool provided to simulate the
dome and check the focus. If it is acceptable, position the lower dome and proceed to Final Installation. If the
lens is now out of focus, readjust the focus ring so the image is slightly out of focus and check the focus again
with the focus tool. Repeat this procedure as necessary until the lens is focused properly. Position the lower
dome and then proceed to Final Installation.
Note: When adjusting the focus, it is recommended that the iris be completely open (a dark condition, either
at night or using a filter) so that the depth of field does not influence the adjustment.
On autoiris lenses, iris adjustment may be required if the picture appears dark or grainy or has poor color.
There is a potentiometer on the camera board to adjust the autoiris. Refer to Figure 7. Turning the
potentiometer opens and closes the iris to regulate light extremes. Turning the potentiometer clockwise opens
the iris wider, allowing more light.
5BInstallation • 9
XX137-60-00 Rev 109 Roughneck V910 Dome Cameras with WDR
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