C-QUAM AM Stereo Broadcasting

From Free Knowledge Base- The DUCK Project
Revision as of 20:57, 23 August 2017 by Ke0etz (talk | contribs) (Created page with "C-QUAM (Compatible Quadrature Amplitude Modulation) - an AM radio technology for broadcasting in stereo. C-QUAM uses quadrature amplitude modulation (QAM) to encode the ster...")
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)
Jump to navigation Jump to search

C-QUAM (Compatible Quadrature Amplitude Modulation) - an AM radio technology for broadcasting in stereo.

C-QUAM uses quadrature amplitude modulation (QAM) to encode the stereo separation signal. This extra signal is then stripped down in such a way that it is compatible with the envelope detector of older receivers (hence the name C-QUAM, i.e. Compatible QUadrature Amplitude Modulation). A 25 Hz pilot tone is added to trigger receivers; it is not necessary for the reconstruction of the original audio sources.