Main Synthesizer; Transmit Frequency Translation Loop - Motorola MTM800 User Manual

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Main Synthesizer

The Main Synthesizer consists of the main VCO and LVFRACN PLL IC. The main synthesizer
provides the LO signal to the first mixer for down-converting the received signal to the 73.35 MHz
first IF frequency and in transmit mode provides the reference frequency for the ESCORT frequency
translation loop.

Transmit Frequency Translation Loop

The transmitter frequency translation loop consists of the transmit VCO and ESCORT near unity
divider PLL IC. This subsystem generates the carrier frequency injection signal for the JAVELIN.
THEORY OF OPERATION (TRANSCEIVER)