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

[Chuck Hutton <charlesh3@xxxxxxx>]

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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