PROPOSAL FOR A PULSE CODE MODULATION TELEMETRY TRANSMITTER

THIS PROPOSAL DISCUSSES THE DESIGN OF A LOW COST, COMPACT, AND EASILY CONSTRUCTED TELEMETRY TRANSMITTER THAT TAKES ADVANTAGE OF THE REQUIREMENT THAT ONLY DIGITAL DATA IS TO BE TRANSMITTED. THE TRANSMITTER USES FREQUENCY SHIFT KEYING OR FSK. DIGITAL SYNTHESIS TECHNIQUES ARE USED TO GENERATE THE OUTPUT SIGNAL FREQUENCY. THIS USES LOW COST AND RELIABLE DIGITAL INTEGRATED CIRCUITS. THE USE OF DIGITAL SYNTHESIS RESULTS IN A DESIGN THAT DOES NOT USE ANY TUNED CIRCUITS AND AS A CONSEQUENCE IS SIMPLE, EASILY ADJUSTED, VIBRATION AND ABUSE RESISTANT AND LOW COST.