This radio use dual VCO, one for Transmit and one for Receiving. The output from TX-VCO is Transmit-frequency. The output from RX-VCO is Transmit-frequency + 45,100MHz.
8-channels User Manual
16-channels User Manual
Schematic Diagram
MC145158 Serial Input PLL Frequency Synthesizer
Dual Operational Amplifier
Quad Operational Amplifier
TDA1519 Audio Power Amplifier
This radio use dual VCO, one for Transmit and one for Receiving.