"Doug Smith W9WI" wrote in message
...
wrote:
- Agree.. ANY way of filtering this out ?
Buy a HD radio.
Seriously.
The Boston Acoustics Receptor HD, when tuning *analog* stations, seems
largely immune to IBOC QRM from *digital* stations on adjacent
frequencies. The set uses digital signal processing of analog signals;
I might guess that it uses the opposite digital sideband to cancel out
the one that's interfering with the desired analog station.
In general, my experience has been that the Receptor HD is a pretty
decent analog radio, both AM and FM, if you give it a decent antenna.
(the antennas provided with the radio are crap) Of course, it is pretty
expensive as well!
Of course, the problem for the radio industry is that almost nobody
*has* a Receptor HD - when the interference cranks up, people will buy
XM or Sirius, put in a CD, or turn on the TV long before they'll buy a
HD radio.
I doubt many people will buy IBOC radios for the presumed audio advantages.
The market for high fidelity AM has always been small and FM can sound
excellent as it is. However, there probably will be some public interest in
the secondary FM channels. And ibiquity's licensing arrangement demands
that any AM - FM radio must have IBOC decoders for both bands. There won't
be any standard AM - IBOC FM radios, at least according to the current plan.
So, in the future, there's a good chance there will be a significant number
of IBOC radios out there. I pretty much expect the AM broadcasters to
enthusisastically jump into IBOC AM, just like as jumped into AM stereo.
AM stereo never caught on. The buying public never much cared to buy the
radios. AM stereo came and went.
It would be ironic if the only way to avoid the IBOC sidebands is to buy
some damned ibiquity licensed radio.
Frank Dresser