Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
For remote control, you need a transmitter and receiver, what does a phase lock loop do for you? A phase lock loop is useful for seperating frequencies, like a band pass filter, or for recovering a frequency that is buried in noise. If the transmitter has enough power, the signal to noise will be high and you can transmit data digitally with Manchester coding and not need any PLL.
Perhaps he may be thinking of the PLL as a tone encoder/decoder... The PLL can encode the data in the form of tones transmitted over a carrier. Then recieved and decoded by the recieving circuitry using an RF reciever and a PLL.
Russel, a Phase Lock Loop can be used to carry data... ie: it receives a modulated signal, and outputs a demodulated signal... basically, it can be used so nothing the receiver doesn't pick up garbage or so noone can 'spoof' the control if you will.