may shift from NIGHT mode (black-and-white mode) to DAY mode (color mode). Use
only proper infrared lighting so that the mode does not get switched.
8. GAMMA ON/OFF switch
When switched ON, GAMMA is 0.45; when OFF, GAMMA is 1.
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V-Phase Adjustment Push Button
This camera is stores the initial data value of V-phase in EEPROM.
NOTE
: This camera offers V-phase adjustment over a range of ±180°. If two or more
cameras are connected to a switcher and the picture on the monitor rolls while switching from
camera A to B, adjusting the vertical phase (V-phase) of the cameras will probably eliminate the
rolling. If this adjustment is necessary, it should only be performed by qualified technician. Before
making any adjustment, confirm that cameras A and B are connected to a power supply with the
same polarity.
To make an adjustment, follow the steps below.
1. While observing the video output signals from both cameras on an oscilloscope, press
camera A's V-phase control push button (on back of camera) until vertical sync from both
cameras is in phase.
2. If camera A's adjustment range is insufficient, adjust camera B's V-phase control push
button in the opposite direction to camera A until they are in phase.
3. If these adjustments do not bring vertical sync from both cameras in phase, recheck the
polarity of the power supply connections.
Camera A's VIDEO OUT
Camera B's VIDEO OUT
Should be in phase
If an oscilloscope is not available, a less accurate adjustment can be made by observing the
monitor and adjusting the V-phase control push button until no roll occurs on the monitor when
switching back and forth between cameras A and B.
XX135-10-01 Rev 409 VC566DN Cameras
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