FM synthesizer-modulator with 1200 channels for SCPC transmission of voice signals by satellite

Practical implementation of a synthesizer at 52,020 to 87,990 MHz wavelength with frequency increments of 30 KHz is described. The phase-locked loop (PLL) technique of synthesis, also known as coherent indirect synthesis, is utilized. This technique involves the use of the PLL technique for frequency division. The MC4044 integrated circuit also is employed. The synthesizer also functions as an FM modulator capable of generating 1200 channels in an SCPC (single channel per carrier) terrestrial station. Its energy consumption is low, about 5 watts.