| 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} |
| 154.1 | DF | .~.~ With indication of frequency, channel, or selector condition (e.g., tuning aid) {6} |
| 155.1 | | .~.~.~ By meter |