From Radio World:
"The author is licensee of 50 kW AM stations KRKO and KKXA in the Seattle market, incoming chair of the Washington State Association of Broadcasters and a former NAB board member. He participated in the recent NAB Labs driving tests of all-digital on the AM band. Opinions expressed are his own."
SUNRISE OR MIGRATION?
"What about an AM “digital sunrise” process, in which all-digital stations would operate on the band alongside analog signals, at least for some period of time?
This would be a mixed bag at best. All-digital is far more robust than current hybrid transmissions. But the sunrise scenario could make the band sound worse to listeners with analog-only radios and could hasten audience flight.
All-digital signals on the AM band sound like 1990s phone modem noise to analog radios (remember the “whoosh” sound after the handshake?). The sound is audible in the sidebands of stations using the technology now. The benefits of stereo separation, better coverage and signal consistency would be realized only by the small portion of the population capable of receiving the all-digital transmissions.
A more elegant solution would be to use the next four decades to migrate occupants of the AM band to abandoned VHF spectrum, meaning current Channels 1–6, and simplify the user experience."
"An all-digital mandate on the AM band could push a large number of directional operators — half or more — out of business, depending on the timing; because the bulk of AM stations in the United States are running with worn-out equipment and transmitter sites, and the revenue supporting those stations is too thin in many markets to justify new investment. The mandate would cull those who can’t or won’t make the upgrade, helping the transition."
Andrew seems to feel that there are too many obstacles in the way of converting AM radio to all digital, time, cost, antenna issues, that interference would eventually overrun IBOC anyway and feels that eventually the AM band should migrate to the mostly abandoned lower VHF band which has been mentioned here time and again.
Much more at:
http://www.radioworld.com/article/skotdal-am-band-needs-drastic-change/273566
"The author is licensee of 50 kW AM stations KRKO and KKXA in the Seattle market, incoming chair of the Washington State Association of Broadcasters and a former NAB board member. He participated in the recent NAB Labs driving tests of all-digital on the AM band. Opinions expressed are his own."
SUNRISE OR MIGRATION?
"What about an AM “digital sunrise” process, in which all-digital stations would operate on the band alongside analog signals, at least for some period of time?
This would be a mixed bag at best. All-digital is far more robust than current hybrid transmissions. But the sunrise scenario could make the band sound worse to listeners with analog-only radios and could hasten audience flight.
All-digital signals on the AM band sound like 1990s phone modem noise to analog radios (remember the “whoosh” sound after the handshake?). The sound is audible in the sidebands of stations using the technology now. The benefits of stereo separation, better coverage and signal consistency would be realized only by the small portion of the population capable of receiving the all-digital transmissions.
A more elegant solution would be to use the next four decades to migrate occupants of the AM band to abandoned VHF spectrum, meaning current Channels 1–6, and simplify the user experience."
"An all-digital mandate on the AM band could push a large number of directional operators — half or more — out of business, depending on the timing; because the bulk of AM stations in the United States are running with worn-out equipment and transmitter sites, and the revenue supporting those stations is too thin in many markets to justify new investment. The mandate would cull those who can’t or won’t make the upgrade, helping the transition."
Andrew seems to feel that there are too many obstacles in the way of converting AM radio to all digital, time, cost, antenna issues, that interference would eventually overrun IBOC anyway and feels that eventually the AM band should migrate to the mostly abandoned lower VHF band which has been mentioned here time and again.
Much more at:
http://www.radioworld.com/article/skotdal-am-band-needs-drastic-change/273566