Celabs DCB101 User manual

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 dects caused by immersion or exposre to liquids, abuse, neglect, improper operation of unit, excess wear and tear and defects resulting from unauthorized disassembly and or modification. Cable Electronics, Inc. http://www.celabs.net 3209 Wood Drive Garland, Texas 75041 [phone] Fax [phone]
Document: DCB101_INFO_A.cdr Rev. A
CE labs can support many areas of your audio and
video distribution needs.
We manufacture RF modulators, RF amplifiers, HD
distribution amplifiers, and cables of all types.
See our full product line at www.celabs.net.
Component Video/ Audio
HDTV Modules
5 CHANNEL
DC ISOLATION UNIT
Eliminates DC offsets in the video or audio that can
cause hum bar interference.
Cable Electronics, Inc. 3209 Wood Drive Garland, Texas 75041 [phone] Fax [phone]

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
Distribution
Amplifier
HD Monitor
or Projector
DCB101 Typical Wiring Application
HD SOURCE
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.
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.