THEORY OF OPERATION: Block Diagram Description
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The RF board is connected to the Logic Board through a 60-pin connector. Fol-
lowing are functions of the RF Board:
1.
Transmit (0.6 watt) - iDEN modulation of the RF carrier with baseband data
signal.
2.
Receive - Demodulation of received RF signal to generate baseband signal
3.
Frequency Synthesizer Channels (806-825 MHz TX) and (851-870 MHz RX).
Logic Board
The Logic Board includes a red cap that controls the transmit ter, receiver, and
synthesizer operations of the integrated circuits located on the RF board. The red
cap houses the DSP and the serial communication interface