User Manual

SECTION 1: THEORY OF OPERATION
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General Block Diagram
General block diagram of the IP1B, which is comprised of eight (8) PCBs (Printed Circuit Boards).
System Controller Consists of a system microcontroller, radio modem, and provides serial
communication interfaces.
DRC (Diversity Continuously selects the receiver with the best signal level to supply recovered
Reception Controller) modulation. Eliminates destructive effects of multi-path fading.
Receiver Injection Creates injection signals used by the three (3) VHF (very high frequency)
receivers to down-convert the carrier to an IF (intermediate frequency).
VHF Receiver Provides reception and demodulation of FM (frequency modulated) VHF RF
(radio frequency) signals. The receivers also provide RF carrier amplitude
information used by the DRC.
VHF Exciter Generates transmit carrier signals and performs frequency modulation.
Power Amplifier Amplifies low-level exciter RF carrier signals to the final output power level.