| 455 / | HD | TELECOMMUNICATIONS |
| 130 | DF | RECEIVER OR ANALOG MODULATED SIGNAL FREQUENCY CONVERTER {24} |
| 230 | DF | .~ Local control of receiver operation {7} |
| 232.1 | DF | .~.~ Gain control {2} |
| 234.1 | DF | .~.~.~ Automatic {15} |
| 239.1 | | .~.~.~.~ Nonlinear automatic gain control {4} |
| 240.1 | DF | .~.~.~.~.~> Variable automatic gain control loop gain |
| 241.1 | DF | .~.~.~.~.~> Different gain stages |
| 242.1 | DF | .~.~.~.~.~> Delayed {2} |
| 244.1 | DF | .~.~.~.~.~> Dual time constant |