Intersil has a single channel adaptive equaliser which is designed to support the transmission of composite video through cables.

The devices, called MegaQ, are designed to automatically equalise video over Cat 5 cable as well as the more traditional coaxial cable. 

The devices are specified to support composite video images at distances up to 1.67km.

Adaptive equalisation takes place on the receive end of the signal chain where images are viewed, so the equaliser can be retro-fitted to existing installations.

Designated the ISL59605, the device compensates for high frequency cable loss up to 60dB at 5MHz, as well as source amplitude variations up to ±3dB.

Every device is automatically compatible with NTSC and PAL, color and monochrome, with no hidden caveats.

Inputs are AC-coupled and internally DC-restored to maximize common mode noise rejection. The output can drive 2VP-P into two source-terminated 75ohm loads.

The equalisers require a single +5V supply and consume only 500mW.