AboutDave Nyce Expertise I have been an electronics engineer for 25 years. I can answer questions on analog and digital circuits and my specialty is sensors.
Experience I am the inventor on 23 US patents, and also some foreign ones. Developed sensors for over 25 years. Licensed private pilot (airplane and rotorcraft), have HAM radio license. I'm not an expert in computer networking.
Question I recently read about the advent of Power Line Carrier Communication in power transmission systems. When I tried getting more info on it I learnt that Frequency Shift Keying is used. Can you please make it clear to me as to how this does not affect the reliability of the 50Hz or 60Hz transmission?
Answer FSK is in the range of about 1 to 3 kHz, or so. The FSK signal is impressed onto the AC power, and is only in the millivolt range, whereas the 50/60Hz power is 115, or 230, or 250 VAC, etc. If an appliance is receiving 115VAC at 60 Hz power, for example, and there is also 1 kHz signal at 50 mV, the appliance is not affected by the 1 kHz signal, and the signal is ignored unless the appliance has detector circuits to detect the FSK signal.
