Stensat Communications
The FM narrow band voice repeater is based on the Motorola MC13136 receiver and MC13175 transmitter pair. The uplink is on 2 M and the downlink is on 70 cm.
Receiver
The receiver is located on the outer copper cladding of the top internal circuit board to provide maximum isolation from the controller.
Transmitter
The transmitter shares the top internal circuit board with the receiver. The output of the MC13175 transmitter is used to drive a RF Micro Devices RF2155 3v programmable gain power amplifier. The controller will set the power amplifier to one of following power levels:
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Low power (100 mW). |
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High power (250 mW). |