DISTRINET COMPONENT

Combining platform

COMBINER UNIT

Combines and splits the RF output of several base stations so multiple systems can share one antenna network. High isolation suppresses intermodulation — this is the signal hub of the DistriNET distributed system.

Combining platform equipment
Multi-channel combiner / splitterFHJ400 SERIES
Signal splitter matrixR-EVDC-BLST SERIES
DuplexerDUPLEXER

Multi-channel combiner / splitter

FHJ400 SERIES

The base-station consolidation unit for a fibre-distributed radio system. It replaces separate combiner and splitter hardware, simplifying both the rack and the cabling. Combining and splitting stay effective across a wider frequency range, with consistent behaviour at different channel spacings — a core standardised module in the system.

Low loss with minimal in-band ripple
High isolation by design, guarding against crosstalk
High power-handling design
Passive design — adds no noise floor
Wideband design, compatible across frequency points
4/6-port splitter and combiner in one unit, supporting 4 or 6 repeaters
Uplink and downlink ports keyed so a mis-connection cannot damage a repeater
2 / 4 / 6
Repeaters supported
≥35 dB
TX port isolation
50 W
Per-port TX rating
≤2 dB
In-band ripple
Full specifications
Frequency range 400–430 MHz (RX ports) · 410–430 MHz (TX ports)
Distribution loss RX: 2-port ≤3.5 / 4-port ≤7.5 / 6-port ≤9 dB; TX: 2-port ≤4 / 4-port ≤9 / 6-port ≤11 dB
Per-port power rating 1 W (RX) · 50 W (TX)
Isolation ≥15 dB (RX) · ≥35 dB (TX)
In-band ripple ≤2 dB
Max repeaters supported 2 / 4 / 6
Connectors · VSWR BNC-J (RX) · N-J (TX) · VSWR ≤1.5
Operating temp · mounting -30 to 55 °C · 19-inch 2U rack · IP40
Full parameters, including every port figure and installation drawing, are in the datasheet (2511 V3).
Network topology
MULTI-CHANNEL COMBINER
Multi-channel combining

Several MARK repeaters are consolidated into a single combined output, which feeds the optical master unit.

Components in the same system

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FAQ

Combiner FAQ

The questions we hear most often on selection, certification and delivery.

Didn’t find your question? Ask an engineer →

A combiner merges several repeaters or bands onto one antenna system, reducing the number of antennas and cables in the building.

FHJ400 is Evertac’s multi-channel combiner series for 400 MHz band repeaters.

Insertion loss is accounted for in the system design so each channel still meets the planned coverage levels.

Yes. Operations, security and fire channels can share the same antenna network while staying separate channels.