Subcarriers are then processed like real radio transmissions, but the whole bandwidth is sampled with an analog-to-digital converter (A/D) at a rate faster than the Nyquist rate (that is, at least twice the IF frequency).Ī tuner can also refer to a radio receiver or standalone audio component that is part of an audio system such as a hi-fi or stereo, to be connected to a separate amplifier. These are transmitted inside the receiver as an intermediate frequency (IF). use a wider frequency bandwidth, often with several subcarriers.

More complex transmissions like PAL/ NTSC (TV), DAB (digital radio), DVB-T/ DVB-S/ DVB-C (digital TV) etc.

Broadcast FM/ AM transmissions usually feed this intermediate frequency (IF) directly into a demodulator that converts the radio signal into audio-frequency signals that can be fed into an amplifier to drive a loudspeaker. Luxman T-240L stereo FM tuner and L-235 amplifierĪ tuner is a subsystem that receives radio frequency (RF) transmissions, such as FM broadcasting, and converts the selected carrier frequency and its associated bandwidth into a fixed frequency that is suitable for further processing, usually because a lower frequency is used on the output.

Tuner picture