kellym@ether.UUCP (Kelly M McArthur) (03/06/91)
Someone recently told me that various kinds of information such as Muzak, and certain "data services" are transmitted on subcarriers of commercial FM broadcast stations. How interesting. Can anyone provide any more information on this? Seems like it might be amusing to build a decoder to see what all's there. -------- "This wallpaper is killing me. One of us has got to go." -Oscar Wilde's dying words -- ******************************************************************** * Kelly McArthur ..tektronix!sequent!ether!kellym * * HALF Associates (Heavily Armed Lunatic Fringe) * ********************************************************************
ppa@col.hp.com (Paul Austgen) (03/08/91)
You can demodulate this information if it is not encoded, such as Muzak, with a phase-locked loop. There are several subcarriers used. With a PLL, you can search around.