Pelco IS90 AUTO IRIS LEVEL ADJUSTMENT, VERTICAL PHASE ADJUSTMENT Use this procedure for 24 VAC operation only., Adjusting Vertical Phase

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In certain lighting conditions, a flicker in the light source may affect camera operation. Flickering can be

caused by a number of conditions, including the quality of the source power and the age and type of

fluorescent bulbs and ballasts.

Set SW4-4 to ON to enable flickerless operation. The camera will remove the effects of flickering when

present. The shutter speed will be set to 1/120 (NTSC) or 1/100 (PAL).

Set it to OFF to disable flickerless operation. This is the default.

NOTE: If you enable flickerless operation, you should use AC line lock for best results.

Auto white balance (AWB) is enabled by default (OFF).

To manually set and lock the white balance:

1. Set SW4-5 to OFF.

2. Hold a white background in front of the lens until the video shows all white.

3. While holding the background in place, set SW4-5 to ON. A blue blinking block appears on the video

image for a few seconds. When the block changes to solid green, the manual white balance (MWB)

process is complete.

Do not change SW4-6 from its factory setting. SW4-6 must be set to OFF for varifocal models; it must be

set to ON for fixed-iris lenses.

AUTO IRIS LEVEL ADJUSTMENT

To adjust the auto iris DC drive level (refer to Figure13 on page 20):

1. Tilt or rotate the camera module until you can access the auto iris level control (R19).

2. Turn the screw clockwise to increase the brightness level or counterclockwise to decrease the

brightness level.

VERTICAL PHASE ADJUSTMENTUse this procedure for 24 VAC operation only.

When using more than one camera power supply, a brief vertical roll may occur on the monitor when

switching from one camera to another. To eliminate vertical roll, reverse the 24 VAC connections on one

camera. If both cameras are connected to the same transformer, this should solve the problem. If the

problem persists, adjust the phase control by synchronizing, or line-locking, the cameras to one another.

NOTE: When adjusting vertical phase, line sync (SW4-3) must be set to OFF for AC line lock.

Adjusting Vertical Phase

You may need two people when synchronizing the cameras: one person at the camera and the other at the

monitor to observe the vertical roll and the effect of any camera adjustments.

To synchronize the cameras:

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

2. Select the camera to synchronize. Use buttons SW1 and SW2 to synchronize the camera to the

reference camera (refer to Figure13 on page 20). SW1 increases vertical phase; SW2 decreases

vertical phase.