Standard Control Station Combiner Application Note
These multi-channel combiners provide frequency-agile operation across their entire frequency range. Control Station Combiners may be used to reduce the number of antennas required on a communications site whilst also ensure that predictable radio-to-radio isolation is maintained at all times – irrespective of individual radio’s Tx or Rx operating mode or antenna isolation characteristics.
A Standard Control Station Combiner (CSC) is an innovative combiner technology that can combine multiple control and
dispatch center operators’ radios, or multiple repeater base stations or point-to-point link radios, to a single set of
Tx and Rx antennas when sufficient antenna separation is available – or to a single antenna when used with a suitable
duplexer. The inherent design architecture of the CSC provides guaranteed isolation between all of the radio equipment
units connected to it, irrespective of the individual ‘transmit’ or ‘receive’ mode of operation, ensuring RF interference
problems do not occur between the units and that their communications quality and reliability is not compromised.
CSCs provide the following features;
• Broadband operation
• Models available to suit half-duplex or full-duplex radios
• Rx LNA and High Power Tx models also available
• Available in capacities from 4 to >128 ports
• Compact size. Easily installed and relocated
• Convenient plug-n-play field expandability
• Manages multiple radios’ co-location issues
• Minimises tower and building rooftop loading
• Reduces site installation costs and effort
CSCs provide a flexible combining solution across their entire broadband frequency range. This capability is particularly
useful in multiple frequency systems, such as trunked radio or voting systems, where the specific frequency of operation
for each operator’s radio can vary on a call-by-call basis, or in applications where a control and dispatchcentere may be
co-ordinating communications across multiple networks and or frequency bands (i.e. VHF, UHF and or 7/8/900MHz).

