What is LO (Local Oscillator)?

Local oscillators are utilized to change an approaching recurrence over to one more recurrence and in some cases are utilized to change starting with one inside recurrence over then onto the next. Local oscillators are utilized in the superheterodyne receiver, the most well-known kind of radio receiver circuit. They are additionally utilized in numerous different communications circuits like modems, cable television set top boxes, frequency division multiplexing frameworks utilized in phone trunklines, microwave transfer frameworks, telemetry frameworks.