Johansson 6555A Programmable Active Combiner – Dual UHF In, PC-over-Coax & SMATV

The Johansson 6555A is a programmable active combiner designed for SMATV and individual coaxial distribution installations. It accepts two UHF antenna inputs and actively combines them into a single coaxial output, with each input independently programmable for gain and channel selection. The unit mounts near the antenna and is configured remotely via PC over the coaxial cable.

The 6555A is part of the Johansson 65xx modular headend platform and works seamlessly with other 65xx components such as the 6520 channel processor, 6554 PC-to-coax module, and 6565 control unit.

Key Features

• 2 × UHF inputs combined to 1 coaxial output
• Active combining with independent gain control per input cluster
• Remote programming via PC over existing coaxial cable (using Johansson 6554 interface)
• Suitable for outdoor near-antenna mounting
• Fully compatible with Johansson 65xx headend system modules

Product Benefits

• Flexible, software-configurable channel and level assignment
• Eliminates the need for passive combiners that introduce signal loss
• Single coaxial cable carries both signal and programming data
• Scalable — combine multiple 6555A units within the 65xx system
• Professional-grade signal integrity for demanding SMATV installations

Technical Specifications

• Inputs: 2 × UHF (2 programmable clusters)
• Outputs: 1 × combined F-type coaxial output
• Max Output Level: 90 dBmV
• Programming: Via PC over coaxial cable (requires Johansson 6554 module)
• Compatible Platform: Johansson 65xx headend series
• Mounting: Outdoor (near-antenna installation)

Why You'll Love It

Swedish engineering for demanding professional TV distribution installations — active, programmable, and designed to integrate seamlessly into the Johansson 65xx headend ecosystem.

• Manual Johansson 6555A, English PDF