8A535X03 Rev. Preliminary-00
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OCR TECHNICAL DESCRIPTION
MAIN FEATURES
The On-Channel Repeater (OCR) is a synthesized, microprocessor-based, high performance, RF
channel selective repeater with 20 Watt output power capability. It is available in the 900MHz band. It
is designed to receive a single RF channel, filter and amplify the channel signal and retransmit it.
The OCR is used for extending the RF Coverage area of an existing radio site by receiving and re-
broadcasting from host to user (downlink) and from user to host (uplink).
The On-Channel Repeater is programmed to receive and transmit on the same frequency.
The OCR operation is programmable either locally from an RS-232 port on the front panel or
remotely from a System Controller. The OCR operating parameters, such as power output,
sensitivity threshold, CTCSS, mode of operation, frequencies of operation, adjacent channel spacing
etc can be configured by the Customer via simple set-up software as described in this manual. The
currently programmed operating parameters of the OCR determine its personality. The OCR
personality is stored in the EEPROM of the unit. It can be saved on a PC as a personality data file,
which can be downloaded on as many OCRs as required.
Additional per channel alarm and monitoring functions are available to indicate any Power, VSWR,
Temperature and Synthesizer lock conditions.
The chassis of the OCR is made from aluminium. The rugged construction minimizes microphonics
and internal feedback. The OCR installation is performed by simply plugging it into a double
Eurocard format 19” EIA rack mount card cage.
