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Linking Two Separate Radio Frequencies Extends Radio System Interoperability

Ultralife Corporation : 30 September, 2008  (New Product)
McDowell Research, an Ultralife company,has introduced the MRC-200AL Tactical Link Repeater System (TLRS), designed for portability and first-responder use with multi-band handheld radios. The TLRS uses the Thales MBITR AN/PRC-148 radio.
The TLRS provides the same repeater capabilities as the MRC-200A with the added feature of linking two or more repeater networks or a repeater network and a base station (via UHF SATCOM, LOS SINCGARS, LOS HAVEQUICK, LOS FM, or LOS AM) through the use of a third multi-band transceiver and a second 20-Watt amplifier. The combined retransmission and repeater capabilities make the TLRS the ideal system for cross-band repeater linking applications.

Controlled by a MicroBlaze™ soft processor implemented on a Xilinx® Spartan®-3E FPGA (Field programmable Gate Array), the repeater is a fully digital update to its analog predecessor. It employs a 4x16 LCD display for fault reporting, setup, RF power output, VSWR and DC voltage and current indications. An Ethernet interface allows for wired or wireless remote control and monitoring of all operating functions on a remote host-computer GUI. The backwards-compatible, smart-battery charging system uses SMBus technology to provide state-of-charge-indication (SOCI) on the LCD display or remote-host GUI and also allows for select non-SMBus batteries to be used.

The TLRS can be powered via universal AC (85-265V, 47-63Hz) or DC (11-36V) with rechargeable battery backup. A smart power management system constantly monitors external vehicle DC power to dynamically control battery charging and internal-battery operation based on voltage levels detected. Both 12V and 24V DC systems have adjustable threshold settings to enable the internal battery chargers when the vehicle's engine is running and disable them when the engine is turned off. Additionally, the vehicle's DC voltage is constantly monitored to switch DC operation to internal batteries when it reaches a critical level, allowing—importantly—enough vehicle battery capacity to re-start the engine.
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