Patent ID: 11863145
Assignee: APPLIED OPTOELECTRONICS, INC.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method for providing automatic gain control (AGC) of a radio frequency (RF) amplifier in a hybrid fiber-coaxial (HFC) network, the method comprising:
receiving an input downstream RF signal having a wideband RF spectrum in the RF amplifier;
amplifying the input downstream RF signal using RF amplifier circuitry to produce an output downstream RF signal having the wideband RF spectrum;
selecting at least first and second pilot channels in a sample of the downstream RF signal having the wideband spectrum at a location in the RF amplifier, wherein selecting the pilot channels is performed using a wideband RF tuner;
measuring power of the at least first and second pilot channels;
determining a correction based, at least in part, on the measured power of the first and second pilot channels; and
sending a control voltage or voltages to the RF amplifier circuitry based on the correction.