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Simple CATV Upstream Fiber Optic Receiver Uses DC Pilot AGC. Upstream fiber links in a community antenna television (CATV) system are usually among the most difficult elements of the network to align properly. Set-top boxes and cable modems employ `long-loop` automatic gain control (AGC) (in other w
receiver circuits - schematic

ords, . Simple Circuit Detects Current Pulses : 01/06/94 EDN-Design Ideas / The pulse detector provides a visible indication of positive and negative current pulses. The pulses amplitudes can vary from20 to150 mA. The pulses durations can range from10 to40 msec, and their repetition rate can span40 to180 pulses/minute.



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