On Sep 29, 8:16 am, SMS wrote:
On 9/29/2010 7:25 AM, RHF wrote:

and . . . when does that other shoe drop . . .
in what year 2015... 2020 . . .

- It will be similar to the transition to digital television, though
- longer. First there will be a requirement that all new receivers be
- capable of receiving digital, then after x number of years there
will be
- a requirement to turn off analog (no doubt with some extensions).
2020
- is probably too early. With television, since so few are mobile
- receivers, it was easy to do adapter boxes for digital but with
radio
- this is unlikely since the adapter would be too costly and too
cumbersome.

No simply by Ramping-Up the Digital Power every
two to three Years over a Two Decades
-and- At the same time Ramping-Down the Analog
Power over the same number of years.

This Works for FM HD-Radio Only :
Digital Power Up -and- Analog Power Down
Year 2005 : Digital 1% -&- Analog 99%
Year 2010 : Digital 10% -&- Analog 90%
Year 2013 : Digital 12% -&- Analog 75%
Year 2016 : Digital 14% -&- Analog 60%
Year 2019 : Digital 16% -&- Analog 45%
Year 2022 : Digital 18% -&- Analog 30%
Year 2025 : Digital 20% -&- Analog 15%
Year 2025 : Digital 20% -&- Analog 00%

AM/MW IBOC is a Different Animal : For the
AM/MW Radio Band with a Digital IBOC Signal
a 1 KW "Local" Analog Radio Station and a
50 KW Clear Channel Radio Station Do Not
Work along side each other in an All Digital
Radio Band [1KW versus 50KW]

Digital AM Radio Power Ranges really will only
work in a more 'Localized' Compressed Set of
Power Ranges :
* 500 Watts Local ~ 25 Miles
{Both Days and Nights}
* 1500 Watts Metro ~ 50 Miles
{Maybe reduced to 1000 Watts Nights}
4500 Watts Regional ~ 100 Miles
{Maybe reduced to 3000 Watts Nights}

?WHY? a 'Localized' Compressed Set of Power
Ranges ?
The reason 'why' is the IBOC Digital Side-Bands will
effectively make all AM/MW Radio Broadcasting "Local"
-and- having a Higher Powered AM/MW Radio Station
will simply be having a Digital Hash Jammer on one to
two channels on each side of it for hundreds of Miles
outside of it's Licensed Broadcast Service Area.

Presently the old 50 KW 'The Clears" have a 'revised'
750 Mile 'protected' Range in the Analog Mode :
This is NOT Compatible with the IBOC Digital Mode
-so- There needs to be a 2nd Revision for the now
former "Clears" to a Regional 100 Mile 'protected'
Range in IBOC Digital Mode with a Power limit of
under 5 KW {4500 Watts}. to insure that their Digital
Side-Bands Hash does not extend to far into 'other'
Media Markets and effective JAM other Broadcasters.