Motorola DIMETRA MTS 2, Installation, Configuration And Basic Service Manual

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MTS 2 and MTS 4 Installation, Con
fi
guration and Basic Service Manual Base Radio - Theory of Operation
Base Radio - Theory of Operation
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The Base Radio (BR) provides reliable digital communications capabilities. Each Base
Radio contains the following subcomponents:
•
Transceiver consisting of a Base Radio Controller, a triple receiver, and an exciter
•
Power Ampli
fi
er (PA)
In the MTS 2 and 4, the Base Radio (BR) operates in conjunction with the Site Controller (SC) through a
properly terminated 100Base-T Ethernet link.
Figure 10-3 shows an overall block diagram of the Base Radio.
Figure 10-2 Base Radio Front Panel
On the front panel, there is a DC power input, three parallel receiver (RX) inputs, a high power
transmitter output signal from the power ampli
fi
er, a service port, two interfaces to the Site Controllers,
and LED indicators. For more information on the LED indicators, see Table 10-1 .
6802800U74-N September 2009
10-3