| 455 / | HD | TELECOMMUNICATIONS |
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| 130 | DF | RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24} |
| 150.1 |  | .~ Signal selection based on frequency (e.g., tuning) {13} |
| 151.1 | DF | .~.~> Remote control of channel or station selection {5} |
| 154.1 | DF | .~.~> With indication of frequency, channel, or selector condition (e.g., tuning aid) {6} |
| 160.1 | DF | .~.~> Plural tuning modes (e.g., manual and scanning, etc.) |
| 161.1 | DF | .~.~> Frequency scanning {9} |
| 170.1 | DF | .~.~> With mechanical or electromechanical selection {7} |
| 179.1 | DF | .~.~> Channel or station selection {8} |
| 188.1 | DF | .~.~> Band selection {4} |
| 192.1 | DF | .~.~> With frequency control {2} |
| 193.1 | DF | .~.~> With antenna circuit tuning {2} |
| 194.1 | DF | .~.~> With muting (e.g., silent tuning) {1} |
| 195.1 | DF | .~.~> Variable voltage or current tuning |
| 196.1 | DF | .~.~> Including variation of local oscillator frequency {1} |
| 200.1 | DF | .~.~> With other control (e.g., volume, gain, bandwidth, etc.) |