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Title: digital audio modulation Post by: wa1mtz on June 17, 2019, 12:57:50 PM anyone have any info on this ?? It is being proposed for the AM b'cast band.. It is also used by gov't fm 2-way radios, narrow band, it is digital on top of the carrier.
Title: Re: digital audio modulation Post by: WA1LGQ on June 25, 2019, 12:13:41 PM Mike digital modulation has been around the broadcast band for a long time. Lots of information on the web. Maybe you heard that they are talking about going all digital. Now the stations that do digital, like WTIC, do it with regular AM simultaneously. They have digital sidebands that sound like noise above and below the carrier. The sidebands are in a range that doesn't interfere with the regular am if the IF bandpass is narrow enough. It sucks for AM dxing of adjacent stations. Or are you talking about something else? AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
Larry |