Direct Digital Synthesis for S-Band TT&C Up Link Transmitters

Abstract

This paper describes a microprocessor controlled Direct Digital Synthesizer associated with a PLL multiplier for generating a basic carrier source for the S-band TT&C up link system. Frequency generation and control of the frequency, to facilitate lock acquisition for the on-board PLL receivers of satellites, by Direct Digital Synthesis using Numerically Controlled Oscillator and associated operating and control circuitry are discussed in this article.

Indexing terms:

• Microprocessor
• Direct digital synthesis (DDS)
• Numerically controlled oscillator (NCO)
• Transmitters
• Phase lock loop multiplier