| 455 / | HD | TELECOMMUNICATIONS | 
| 130 | DF | RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24} | 
| 132 | DF | .~ Plural receivers {4} | 
| 133 | DF | .~.~ With output selecting {3} | 
| 136 |  | .~.~.~ With control (e.g., automatic gain control, automatic frequency control, etc.) |