Re: [IRCA] DRM vs IBOC

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

--- Scott Fybush <scott@xxxxxxxxxx> wrote:

>> 
> DRM's main offerings are non-hybrid systems for use on MW, SW and up
> in 
> the 26 MHz region. For these systems to work, broadcasters have to 
> either use separate spectrum from their analog transmissions (not an 
> option for US MW broadcasters, but easy enough to do on SW) or be 
> willing to shut off their analog in favor of going digital-only.
> That's 
> something some European MW broadcasters are willing to consider; it's
> not yet something most US MW broadcasters want to do.
> 

*** And it is because IBOC is a hyrid, where the digital signals occupy
the sidebands of the channel and the analog the center that we
encounter the hissing. In turn, we have a hybrid here because, as Scott
indicated, broadcasters here obviously had some reservations about a
full digital conversion and also about using other bands ( although I
don't believe there was one single band available which could have
filled the bill.

Bottom line, building one compromise onto another doesn't always result
in a good thing.




Russ Edmunds
Blue Bell, PA ( 360' ASL )
[15 mi NNW of Philadelphia]
40:08:45N; 75:16:04W, Grid FN20id
<wb2bjh@xxxxxxxxx>
FM: Yamaha T-80 & Onkyo T-450RDS w/ APS9B @15'
AM: Hammarlund HQ-150 & 4' FET air core loop


 
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