AM "HD" should never have been FCC approved. All it does is put "hash" noise on each side of the AM's main frequency, thus interfering with other AM stations adajacent and its range is limited. It also limits the bandwidth (quality) of the remaining analog signal as part is used for digital, part for analog.
Originally AM HD was not allowed at night on AM due to skywave interference with other stations, then the FCC allowed it "on" if broadcasters wanted to leave it "on." Many of the big-stick AM's have shut off their AM HD now completely, some just re-broadcast their sister stations on the subcarriers.
FM HD broadcasting range is severely limited as compared to its parent station.
In the bigger picture, HD radio has not caught on with consumers, and many stations have now shut it down. We had the option to do it for AM station when buying a new transmitter in 2005, but decided against it based on lack of consumer support/knowlege/ and lack of consuer radio purchases.
From the (small) broadcaster's side, not only do we have a yearly FCC regulatory fee for our licenses, but...to do HD, we have to buy very expensive equipment, and....we have to pay what I consider an overpriced, overinflated license fee to Ibiquity to broadcast any HD! (Part of which goes to its partners, including Clear Channel which is a competitor in many markets to the very broadcasters who may consider offering the HD channel in their markets!)
Consumers who want to enjoy playing with HD (much like we do satellite on this site)...should look for "deals" on the add-on radio boxes for their cars and sales on other models. DON'T pay much for HD. Even the stand-alone tuners have dropped in price as demand is not there to buy receivers, and many broadcasters are not using the HD options.
There is supposedly a push on for the upcoming Christmas season for HD radio sales, but if it follows the path of the past few years, sales won't be exciting for HD radios.
By the way, HD in radio does NOT stand for High Definition. It's just a buzzword-name hung on the subcarrier-based digital product.
Originally AM HD was not allowed at night on AM due to skywave interference with other stations, then the FCC allowed it "on" if broadcasters wanted to leave it "on." Many of the big-stick AM's have shut off their AM HD now completely, some just re-broadcast their sister stations on the subcarriers.
FM HD broadcasting range is severely limited as compared to its parent station.
In the bigger picture, HD radio has not caught on with consumers, and many stations have now shut it down. We had the option to do it for AM station when buying a new transmitter in 2005, but decided against it based on lack of consumer support/knowlege/ and lack of consuer radio purchases.
From the (small) broadcaster's side, not only do we have a yearly FCC regulatory fee for our licenses, but...to do HD, we have to buy very expensive equipment, and....we have to pay what I consider an overpriced, overinflated license fee to Ibiquity to broadcast any HD! (Part of which goes to its partners, including Clear Channel which is a competitor in many markets to the very broadcasters who may consider offering the HD channel in their markets!)
Consumers who want to enjoy playing with HD (much like we do satellite on this site)...should look for "deals" on the add-on radio boxes for their cars and sales on other models. DON'T pay much for HD. Even the stand-alone tuners have dropped in price as demand is not there to buy receivers, and many broadcasters are not using the HD options.
There is supposedly a push on for the upcoming Christmas season for HD radio sales, but if it follows the path of the past few years, sales won't be exciting for HD radios.
By the way, HD in radio does NOT stand for High Definition. It's just a buzzword-name hung on the subcarrier-based digital product.