Neal L. Walters
ABSTRACT
A new type of pulse-amplitude transmission system (PATSY) has been developed to transmit numeric data asynchronously over relatively short distances. The "transmitting station" requires no power or data set. As many as 32 transmitting stations can be attached to a single "receiving station." Other advantages are simplicity, flexibility, and low cost.
The low-speed system has similarities to a Touch-Tone telephone, using resistors instead of tone oscillators. Resistors are less expensive and may be more reliable. The adapter in the sending station operates similarly to an ohmmeter which reads resistances in either polarity.
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