DCB101 5 Channel DC Isolation Unit

DCB101 5 Channel DC Isolation Unit
MODEL #
DCB101
AUDIO/VIDEO AMPLIFIER
5 Channel DC Isolation Unit
Component DC Isolation Unit eliminates DC ofsets in the video or audio that can cause hum bar interference.
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KEY FEATURES
Easy to use HDTV module
Compatible with HD distribution amplifieres
Eliminates annoying hum bars
Up to three video channels may be used for three
individual composite video signals if desired
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SPECIFICATIONS
Function:
– Connectors:
– Channels:
– Video Bandwidth:
– Audio Bandwidth:
– Dimensions:
– Mounting Holes:
5 RCA in, 5 RCA out
3 Video
2 Audio
>300 MHz
20Hz to >100kHz
1.25” x 3.9” x 1.5”
(2.3 including mounting tab)
1.8” spacing, 0.15” diameter
HD Monitor or Projector
HD
Distribution
Amplifier
Note: The three video channels may be used for three individual composite
video signals if desired.
HD SOURCE
Breaking the DC path between the Video
Source and the Distribution Amplifier can
sometimes eliminate annoying hum bars.
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Causes:
– If you are seeing a green (blue, grey, etc.) bar that is slowly
floating up through the picture, you are experiencing a video
hum bar.
– If the source electrical power is too low, the video devices may
have a problem regulating their power supplies. This issue can be
compounded by sources that output DC offsets that place
additional loads on the video distribution system.
– A second source of the problem is differential ground voltage
potentials, which cause AC power to flow through the video cable
grounds. This is commonly referred to as a “Ground Loop.”
– The hum in the system might also be induced into the video
cabeling by being routed too closely to an AC power cable.
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PRO TIP: VIDEO HUM BARS
Remedies:
1. The signal and AC power cables should never be
bundled together.
2. Have a qualified electrician find and repair any defective
AC outlets that may be causing AC Ground Loop currents.
3. Use a distribution amplifier with isolated input grounds in
order to break the Ground Loop.
4. If the video source has DC voltage on the video output,
inserting a DC voltage blocker in line can eliminate
problems in the distribution network.
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