Honeywell NightHawk Serie Guia Del Usuario página 13

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Adjust the Line Lock (Vertical Phase) for 24 VAC
Operation
Phase adjustment may be necessary in multiple camera installations to
prevent picture roll when switching between cameras. To adjust the
vertical phase while switching between two cameras, push down the left
or right switch on one camera until there is no vertical roll (see
Note If the phase cannot be adjusted to prevent picture roll,
reverse the power polarity.
Adjust the Backlight Compensation
The backlight compensation (BLC) adjusts the electronic shutter speed
of the camera based on the light levels in specific areas of the scene.
This adjustment provides better image quality for scenes that are
unevenly lit.
The BLC factory default setting is OFF (see
Precautions
The light emitted from the near-infrared light emitting diodes provides
illumination over a wide area. This light is not considered a risk to the
unshielded human eye. However, as with any light source, it is
recommended that normal precautions be taken to avoid unnecessary
exposure. For example, avoid staring into the beam or viewing directly
with optical instruments at close range.
Note IR LEDs could be warm after prolonged use.
Rev 1.00
Figure 4).
8 Document 900.0391
Figure 3).
09/05