[81-111-108] 1X8, Composite Video DA, Std Input, Unity Gain


The 81-111-108 is a one input to eight output composite video distribution amplifier with a single ended input (75 Ohm termination). This unit has unity gain between the input and all four outputs. Unused outputs do not need to be terminated with 75 Ohms. All of the video connections are BNC connectors. This unit is intended to be used with NTSC or PAL video signals.

Single Unit Pricing $538.00


  • Analog video distribution amplifier (DA)
  • NTSC or PAL formats
  • 1 input, 8 output configuration
  • Unity gain (1X) between the input and outputs
  • Standard single ended 75 Ohm terminated input
  • BNC connectors for video signals
  • Sealed epoxy package
  • Isolated switcher supply (12-24 VAC, 10-34 VDC)
  • 2.2” X 4.4” X 1.40” size (not including connectors)
  • Mounted using two 6-32 threaded inserts


# Channels1
Input 1 Signal TypeComposite Video
Input 1 CouplingDC
Input Configuration 1Standard 75 Ohms
Gain ConfigurationUnity
Input 1 ConnectorBNC
Output 1 Signal FormatComposite Video
Output 1 CouplingDC
Output 1 ConnectorsBNC
Power Connector4 pin 3.5mm TB
Input Voltage 112-24 VAC
Input Voltage 210-34 VDC
Weight Oz7
Low Operating Temp (C)-40
High Operating Temp (C)85
Power BypassNO
MountingTwo 6-32 Inserts



Common Application

The common application of this unit is to generate eight copies of a single composite video signal so several downstream devices can be driven without degradation of the video quality. Because this is an active device (requires power) signal quality as well as signal level are maintained while generating the multiple copies of the original signal. The high bandwidth of this unit insures the input video signal is not modified due to bandwidth roll off (DC - 200 MHz bandwidth at -3db level).

Power Supply

This unit has an isolated internal switcher power supply. The unit will operate correctly on 12-24 VAC or 10-34 VDC. The power input is protected so power can be applied in either polarity. The supply provides the internal electronics with power totally ground isolated form the power input. No opto electronics are used so the unit is not temperature limited by the isolated supply. The power connector is a four pin plug with jack screws so the power connection can support high vibration environments. In addition to the two pins used for power input, a third pin provides access to the internal electronics ground circuit. The fourth pin provides access to an internal chassis ground that connects to internal ESD protection devices.


The package for this unit consists of a solid epoxy block. The internal electronics are assembled and tested before the encapsulation process. During the encapsulation the printed circuit board(s) are placed in a five sided box made of RTV mold parts. The cavity is filled with epoxy and the lid (top) of the mold is inserted. The curing process takes 24 hours. This type of package seals the electronics so water and contamination cannot affect the internal electronics. This type of package also provides superior resistance to shock and vibration compared to a metal or plastic box enclosure.