Issue 1, 2010
Innovative Combining Solutions
RFI’s new Shorthaul Control Station Combiners (SHCSC’s) are an ideal solution for combining multiple radios in control and despatch centres or in short distance point-to-point link applications.
CONTROL ROOM COMBINING
Control centres often co-locate many control stations (usually desk mounted mobile radios), allowing radio operators to communicate with multiple field-based personnel simultaneously.
Depending on the radio channel frequencies used, the simultaneous operation of these control stations can cause a degradation of communications due to their close proximity to each other. This can be particularly true where trunked radio systems are being utilised and the actual radio channel frequency allocated for each radio call changes randomly on a call-by-call basis.
RFI can also provide a range of crossband couplers to separate multiple frequency bands if required, allowing separate directional antennas to be installed pointing to respective networks' base station sites.
The SHCSC is a multi-channel combiner that can be used to combine single or dual RF port transceivers (such as mobiles) to a single antenna. SHCSC provides broad operating frequency bandwidth, guaranteed port-port isolation and are available in easily expandable standard model configurations.
RFI's ShortHaul Control Station Combiners are designed to provide a flexible combining solution suited to a specific range of applications.
DESIGN FEATURES:
- Guaranteed isolation between all radio equipment connected to it, irrespective of their individual “transmit” or “receive” mode of operation.
- Up to 8 channels of combining can be realised in a compact 1RU 19inch rack enclosure.
- Flexibility - the combiner housing can be removed from the 1RU front panel and mounted vertically on a wall or console rear panel using an optional wallmount bracket.
- Broadband SHCSC's operate across the entire 400-960 MHz frequency range and are available for channel capacities from 4 to 128 channels, with in-field expansions simply and easily installed at any future time as required.
The benefits of having many co-located Control Centre radios combined onto a single antenna include;
- Predictable isolation between all radios
- Control of desense, blocking and intermodulation (IM) induced problems
- Preventing radio receivers’ overload due to their proximity to the network transmission site
- Broadband Frequency capability allows multiple frequencies to be operated without combiner retuning.
- Ease and speed of deployment – minimal coaxial cable and antenna installation.
- Flexibility – changes to operating frequencies doesn’t require
retuning effort. - Reduced equipment inventory – broadband combiners suit multiple frequency bands
The use of SHCSC combining for these deployments provides a cost-effective, easily deployable solution for short-term rental and similar “event” applications.
Contact your local RFI Sales office for further information phone
1300 000 RFI.
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