1300 000 734

MiniSystem Combiner, UHF 340-520MHz, 4 Channel, 50 Watt, Single Antenna Operation, c/w Rx Preamplifier


The MiniSystem Combiner (MSC) is an innovative solution that simplifies the design, quotation, procurement and installation of RF combining for applications requiring 1-4 RF channels. Catering for most standard frequency sub-bands, channel spacings and Tx-Rx frequency separations, MSCs are compatible for use with analogue and digital technologies in a wide range of two-way radio, telemetry, linking and other wireless network applications. The MSC is available in VHF, UHF and 7/8/900MHz frequency ranges.

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The MiniSystem Combiner (MSC) comprises a transmitter combiner using dual-stage isolators and innovative hybrid combining techniques to provide excellent Tx-Tx isolation and to minimise intermodulation (IM). An integral Receiver Multicoupler uses a low-noise amplifier (LNA) featuring user-selectable gain and excellent 3OIP performance to ensure optimum system receive sensitivity is available.

A high quality bandpass duplexer provides Rx preselectivity, Tx Post filtering, and Tx-Rx system isolation performance. Form-C relay alarm outputs provide alarm notification of DC power or Rx LNA amplifier failure.

• 4 channel capacity
• Integral duplexer for single antenna operation
• 50W Tx input power (per channel)
• 100% Tx Duty Cycle
• Open-circuit antenna port VSWR protection
• Ultra low noise receiver preamplifier
• User-selectable Rx gain
• DC power and Rx LNA Fail alarm monitoring
• Compact 19in rack mounting
Frequency Range UHF 340 - 520 MHz (in sub-bands)
Tx Channel Capacity 4
Tx Input power per channel ≤ 50W per channel
Tx Duty Cycle 100% per channel
Tx-Tx Bandwidth 2MHz
Tx Insertion Loss (typical) 7.7dB (typ.)
Tx-Tx Isolation dB > 70dB (typ.)
Tx-Ant Isolation > 60dB
IP Rating Indoor Use Only
RF Connectors Tx I/Ps = N (F), Rx O/Ps = BNC (F), Antenna Port(s) = N (F)
Tx-Rx Isolation > 80dB (typ.)
Tx Input Return Loss 20dB typ.
Tx-Rx Separation 5MHz min.
Rx Channel Capacity up to 4
Rx-Rx Bandwidth 2MHz
Rx System Gain -10dB to +10dB (in 1dB steps)
Rx LNA Noise Figure < 2dB (1.2dB typ.)
Rx Maximum Input Level -10dBm
Rx-Rx Isolation > 18dB
Rx Output Return Loss > 20dB
Alarms DC Supply Voltage Low, Rx LNA Fail
Alarm Outputs Dry Relay Form-C (N.C./N.O./CMN)
Enclosure 3RU 19in Rack Mount (Black)
DC Power Requirements +11VDC to +28VDC 3.5W typ. (polarity protected)
Impedance 50 ohms (all RF ports)
DC Connector 2pin 5mm Phoenix (mating plug supplied)
Alarm Connector 3pin 5mm Phoenix (mating plug supplied)
Temperature Range -30° to +60° C (-122° to +140° F)

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