NetMedia VIDLAMP-HIR User Manual
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MAN-VIDLAMP-HIR REV0707A
NM-VIDL
AMP-HIR
NetMedia, Inc., 10940 N. Stallard Place, Tucson, Arizona 85737 (520) 544-4567 Fax: (520) 544-0800 Email: [email protected] www.netmedia.com
Frequently Asked Questions
Q- Why do the light areas of the picture look washed out?
A- The camera’s automatic iris must decide how much to open for shadow areas or close for light
areas. When a picture has both light and shadow, the camera adjusts the iris based on the
percentage of each area in the image. If it decides to open more for the shadow portions then
the light areas will be overexposed. In addition, cameras that are designed for low light or
infrared sensitivity typically favor the shadow areas and look more washed out under bright
conditions. Try adjusting the image field so that more light areas are visible and see if the iris
closes to improve the picture. It is normal though, that as the lighting conditions change
throughout the day, so will the camera iris and the picture’s dark or light areas.
Q- Why are the shadow areas too dark to see much detail?
A- This is like the washed out question above except opposite. In this case, the camera’s automatic
iris is opening more for the light areas at the expense of the shadow areas. Try adjusting the
image field so that more shadow areas are visible and see if the iris opens to improve the
picture. Keep in mind though, that the camera still does need some kind of light in order to see.
If necessary, add some lighting to the dark area to improve visibility.
Q- How can I see the camera on my TV without using an expensive security monitor?
A- The composite video signal from the camera can be plugged directly into one television’s RCA
Video Input jack and viewed when that TV is switched to the proper input. Another option is to
feed the camera signal into a modulator. A modulator, such as NetMedia’s MM70, changes the
video to a UHF or Cable channel and allows the signal to be distributed to all your TV’s along
with the existing antenna/cable/satellite service.
Q- How can I increase the length of the power cord?
A- The camera requires 12V DC 300mA of power. You may use another power supply and cable but
the connector needs to be just like the power jack of the included transformer, 5.5mm outer
dia., 2.1mm inner dia., center positive. Do not cut the cables coming out of the camera or you
will void the warranty. Do not reverse the polarity on the power jack or you will damage
the camera and void the warranty. The power supply, along with the cable type and length,
will affect the voltage that is available to the camera. There must be at least 12V DC under load
at the camera in order for it to function properly.
Q- How can I use this camera if there is only one coax running to its location?
A- This camera was designed for use with separate power and video cables. NetMedia does
however, offer One Wire Video™ solutions for various installation applications. In this case, you
could use the Power Over Coax (NM-POCSET) modules to supply power through the video
coax to this camera. NetMedia’s CAModulator products are cameras with modulators already
built into them. They also require only one coax for both power and video. Modulated video
requires a tuner for viewing so monitors, quad displays, and DVR’s cannot directly accept that
type of signal.