The telemetry system used on the Saturn S-I stage for the transmission of vehicle test data is described. Multiplex and modulationtechniques such as PAM/FM/FM, SS/FM and PGM are used in the system. The diverse data requirements for developing the eight-engineliquid-fueled stage necessitated the use of a combination of severalmodulation techniques to efficiently handle the data. A cursory comparisonis made of the merits of each technique. Physical and electricalrequirements and characteristics of the system are outlined.
