US PATENT SUBCLASS 342 / 200
.~ For frequency modulation

Current as of: June, 1999
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342 /   HD   COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

175  DF  WITH PARTICULAR CIRCUIT {13}
200.~ For frequency modulation {1}
201  DF  .~.~> Combined with pulse modulation

DEFINITION

Classification: 342/200

For frequency modulation:

(under subclass 175) Subject matter wherein the frequency or phase of the transmitted radar signal is variably controlled as a function of time or other factor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

83, for control of the radar transmitter signal phase or frequency other than pulse repetition frequency (PRF).

122, for radar FM type altimeters.

128+, for radar distance determination with frequency

modulation.