455 / | HD | TELECOMMUNICATIONS |
130 | DF | RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24} |
150.1 | DF | .~ Signal selection based on frequency (e.g., tuning) {13} |
179.1 | DF | .~.~ Channel or station selection {8} |
183.1 | DF | .~.~.~ With frequency synthesizer {1} |
183.2 | .~.~.~.~ Processor controlled |