Справочник Пользователя для Pelco C2910M-A (4/05) 3

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C2910M-A (4/05)

Camera synchronization may affect installations that use two or more AC power supplies for multiple cameras. Due to different power phases, a 
brief vertical roll may appear on the monitor when switching between cameras. To eliminate this vertical roll, adjust the phase control to 
synchronize the cameras to one another.

It may be necessary for two people to communicate when synchronizing cameras, one at the camera and the other at the monitor, to observe the 
vertical roll and the effect of any camera adjustments.

To synchronize cameras:

1. Choose a reference camera to which all other cameras will be phased.

2. Access the V-PHASE ADJ slider for a camera. Synchronize the camera to the reference camera by moving the slider either left or right.

A dual trace oscilloscope is recommended, but not required, to adjust camera phase. Align the vertical sync pulses of the reference camera 
to the selected camera.

3. After each adjustment, switch back and forth between the adjusted camera and the reference camera. Repeat this process until the roll 

between the cameras disappears completely.

4. Adjust the phase of all other cameras by repeating steps 2 and 3. Always adjust to the reference camera selected in step 1.

5. As soon as you finish customizing this and all other camera settings, save your custom settings into a user-definable profile. Then change 

the default profile to CUSTOM1 or CUSTOM2. This protects them in case the camera loses power or must be restarted (refer to Profiles 
Menu for more information).

To adjust phase control:

1. Display the LINE SYNC menu.

2. Switch the LINE SYNC setting to LINE LOCK.

3. Slowly move the V-PHASE ADJ slider until the vertical sync is correct.

4. Select EXIT to close the setup menus.

5. As soon as you finish customizing this and all other camera settings, save 

your custom settings into a user-definable profile. This protects them in case 
the camera loses power or must be restarted (refer to Profiles Menu for more 
information).

NOTE:  Camera synchronization is automatic in installations that use Pelco V-Sync.

<LANGUAGE>
<LENS/VIDEO SIGNAL>
<CAMERA DISPLAY>
<LIGHT METER>
<WHITE BALANCE>
<PROFILES>
<SYSTEM INFORMATION>
EXIT

MAIN MENU

VIDEO STANDARD  

AUTO

AUTOMATIC (AGC) 

ON

LENS TYPE 

DC

<LINE SYNC>
<VIDEO LEVEL>
<AUTO IRIS>
<FINE FOCUS>
BACK
EXIT

LENS/ VIDEO SIGNAL

LINE SYNC

LINE SYNC
V-PHASE ADJ

INTERNAL

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BACK
EXIT

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