(under subclass 91) Subject matter wherein the transmitter is constructed so that it may be changed from one type of transmitter to a different type of transmitter, such as, for example, changed from a crystal controlled to a tunable transmitter or change from FM to AM.
(1) Note. If one alternative is pulse, e.g., digital transmission, the system is classified in Class 375.
SEE OR SEARCH CLASS
375, Pulse or Digital Communications,
216, for transmitters convertible to/from pulse modulated carrier wave.