Headend

The Becker Electronics UHF Headend Combiner Splitter is used for radiating radio signals through "leaky" cable systems. These radio signals are used to provide two-way radio services in solutions where conventional UHF connections from central areas using an arterial is not practical. The radiating cable 8 or 16 Way Head End Combiner is typically used in Mining, Shipping, Tunnelling, Motorway and In-Building radiating cable systems to compensate for Leaky Feeder Cable longitudinal losses in both directions simultaneously. The Head End (HE) is located either on the surface or underground and serves as the main communications link from the surface down to the mine via the Leaky Feeder cable network. In the case of coal mines, the Head End must be located on the surface. The Head End provides transmission and reception of 8 or 16 voice/data channel pairs.

The Head-End Combiner Splitter manages 4 Leaky Feeder Arterials. A total of 8 or 16 transmitters and complementary receivers gain access to the 4 Arterials by means of BNC connectors on the rear of the Head End Combiner Splitter.

TRANSMIT PATH:

All 8/16 inputs from the base station transmitters are combined into a single signal. This single combined signal is then Band-pass filtered for transmit band frequencies and split into 4 separate channels. The split & filtered signal then drives the 4 Arterial Connectors through 4 separate directional power couplers. The forward power (Transmit power into the Arterials) is then indicated on 4 front panel bar graphs, one for each Arterial.

RECEIVE PATH:

Each of the signals being received from the 4 Arterials are routed through directional power couplers. The reverse power (Receive power from the Arterials) is then indicated on 4 front panel bar graphs, one for each Arterial. These 4 Arterial signals are then combined into a single signal and filtered for Receive band frequencies. This filtered signal is then split into 8/16 separate signals. The split filtered signals then drive the 8/16 BNC outputs of the Base Station Receivers.