[BC] IBOC

[Phil Alexander]

On 13 Jul 2005 at 20:13, Bill Harms wrote:

> Barry:
> 	I assume you mean the extended band 1610-1700 khz.  I think that would be 
> a good idea and something that should be looked at more carefully.  I understand 
> about the expanded band being opened up before IBOC was introduced, but this 
> would have been a good opportunity if it would have started from the ground floor.
> 
> Bill Harms
> 
> On 13 Jul 2005 at 17:01, Barry Mishkind wrote:
> 
> >          ... or perhaps "re-write" the AM Stereo requirement
> >          for expanded band to IBOC?
> 

It appears that an X-band station may transmit either AMS or IBOC
as they choose. However, the two are incompatible so they must
choose one or the other. 

With a few exceptions, X-band stations make ideal "plug-n-play" 
candidates for IBOC considering; new transmitters that can be 
converted to IBOC, and simple transmission system with short 
average tower height that lends itself to the needed bandwidth. 
Additionally, the b/w to Cf ratio is lower. Most of them should 
be able to transmit IBOC with transmitter mods to accept the 
exciter output and a little cusp rotation adjustment at the 
Tx output.


Phil Alexander, CSRE, AMD
Broadcast Engineering Services and Technology 
(a Div. of Advanced Parts Corporation) 
Ph. (317) 335-2065   FAX (317) 335-9037





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