Re: [IRCA] All-Digital AM Co-Channel Lab Test Results Unveiled

[Russ Edmunds <wb2bjh@xxxxxxxxx>]

If the intent were for all stations to go digital, then such a test would
be meaningless; this suggests therefore that there is contemplation of
mixing all digital with analog all within the AM band ??

Russ Edmunds
15 mi NW Phila
Grid FN20id
<wb2bjh@xxxxxxxxx>

AM: Modified Sony ICF2010's (2) barefoot w/whip
FM: Yamaha T-80 & T-85, each w/ Conrad RDS Decoder;
Onkyo T-450RDS; Tecsun PL-310 ( 2);
modified Sony ICF2010 w/APS9B @ 15';
Grundig G8 w/whip; modified Sony ICF2010 w/whip


On Fri, Apr 22, 2016 at 1:03 AM, Chuck Hutton <charlesh3@xxxxxxx> wrote:

> Yes, desired to undesired is often-used nomenclature in the communications
> world.
>
> I don't see how you can correlate hybrid IBOC to all digital IBOC. What
> you hear with KRKO/KAST is different from what you will hear
> with all digital as the power spectrum and subcarrier levels are vastly
> different.
>
> Chuck
> ________________________________________
> From: IRCA <irca-bounces@xxxxxxxxxxxxxxxx> on behalf of Nick Hall-Patch <
> nhp@xxxxxxxx>
> Sent: Friday, April 22, 2016 4:51 AM
> To: Mailing list for the International Radio Club of America
> Subject: Re: [IRCA] All-Digital AM Co-Channel Lab Test Results Unveiled
>
> I presume "D/U" abbreviation in this piece refers to "desired / undesired"?
>
> I wonder if someone recorded audio from those tests, rather than just
> tossing dB's around?   I have a recording of KAST-1370 from this
> morning that says otherwise, with KRKO-1380 IBOC sidebands about 25dB
> down and....welll, KAST is readable, but I wouldn't say it's lacking
> interference.   The noise becomes really dominant if KAST is less
> than ~15dB above the IBOC level.
>
> best wishes,
>
> Nick
>
>
>
>
> At 21:05 21-04-16, you wrote:
> >
> http://www.radioworld.com/article/all-digital-am-co-channel-lab-test-results-unveiled/278670
> >
> >Sent from my iPad
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