CE Labs DCB101 User manual

Brand: CE Labs

Model: DCB101

Category: Video line amplifiers

Type: User manual

INSTRUCTION MANUAL

5 Channel DC Isolation Unit

Component Video/ Audio

HDTV Modules

DCB101

Eliminates DC offsets in the video or audio

that can cause hum bar interference.

CE labs can support many areas of your audio and video

distribution needs.

We manufacture:

• Digital Signage software and Media Players

• HD Matrix Switchers

• RF amplifiers

• HDMI and Component HD distribution amplifiers

• CAT 5 Signal Extenders

• VGA Extenders and Splitters

• and cables of all types.

See our full product line at

www.celabs.net

WARRANTY

Cable Electronics, Inc. warrants this product to be free from defects in

material and workmanship, under normal use and service, for a period of

one year from the purchase by the original purchaser. If this product is

defective or malfunctions, Cable Electronics will replace or repair this unit

(at their option) within a reasonable time. No expressed or implied warranty

is made for any defects caused by immersion or exposure to liquids, abuse,

neglect, improper operation of unit, excess wear and tear and defects

resulting from unauthorized disassembly and or modification.

Document: DCB101_manual.pdf

930-5062-01

3209 Wood Drive

Garland, TX 75041

Phone: (469) 429-9200

Toll free: (800) 767-6189

Fax: (469) 429-9205

www.celabs.net

VIDEO HUM BARS

Causes:

So you just finished installing a new video distribution system and everything

looks great. Wait a minute, what is that green (or blue, or grey, etc.) bar that

is slowly floating up through the picture. If this sounds familiar, you are

experiencing a video hum bar.

There are a couple of different causes for hum bars. 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 “Ground Loop”.

The hum in the system might also be induced into the video cabling by

being routed too closely to an AC power cable.

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.

SPECIFICATIONS

Connectors: 5 RCA in, 5 RCA out

Channels: 3 Video

2 Audio

Video Bandwidth: >300 MHz

Audio Bandwidth: 20 Hz to >1 MHz

Dimensions: 1.25” x 3.9” x 1.5”

(2.3 including mounting tab)

Mounting Holes: 1.8” spacing, 0.15” diameter

NOTE: The three video channels may be used for three

individual composite video signals if desired.

DCB101 TYPICAL WIRING APPLICATION

INSTALLATION INSTRUCTIONS

Unpack the DCB101 from the box. Place the adapter in a suitable location

close to the source unit. The user will need to supply a patch cable from the

source to the DC isolator. Plug a cable from the DCB101 to the distribution

amplifier. This will remove the DC offset from the source Video and Audio

channels. If the DC offset was the cause of the hum bar issue, this should

eliminate the problem. The unit may be secured to a wall with user supplied

screws.

Installation is complete.

HD SOURCE

Distribution

Amplifier

HD Monitor

or Projector

HD Monitor

or Projector

HD Monitor

or Projector

HD Monitor

or Projector

Breaking the DC path between the Video

Source and the Distribution Amplifier can

sometimes eliminate annoying hum bars.

CE Labs DCB101 User manual

Brand: CE Labs

Model: DCB101

Category: Video line amplifiers

Type: User manual

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CE Labs DCB101 User manual

CE Labs DCB101 User manual

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