Total posts : 45366
Ok the police band 460 Mhz uses 12.5 Khz steps. If AM goes Digital you could get a lot more channels in the same space than analog FM can. I think they will start making digital Radio’s that can also receive analog as well. Some stations may transmit both for quite some time. Here is a question isn’t HD Radio the same as Digital? Am I missing somethig? HD Radio has not really caught on much in the USA and the only Radio’s I’ve seen was in cars. My friend had one and it did sound really nice. One Classic Rock station in the Detroit area years ago started playing Real Album Rock deep tracks only on the HD side. But he said if he went 30 miles away from the city all the HD stuff started to chop in and out.
If Radio goes digital I don’t see them taking away analog from part 15. This could be a good thing, but if they try and cram more stations that would be bad unless they use the HD 2.3.4 for different stations on the same frequency. Then the band will have more room. Still I say 15 years till all analog Radio is gone and that day depends on the folks using their smartphones to replace Radio. The NAB wants cellphone carriers to stop blocking the FM Radio’s in these devices. I’ll be glad when that happens.