Re: [IRCA] IBOC Hash AM vs FM OT question

[Scott Fybush <scott@xxxxxxxxxx>]

On 5/20/2015 1:14 AM, Patrick Martin wrote:

> I guess nulling FM or AM hash is the same. I have tried to get "any"
> hash at this location. To date I have still never detected any. Now,
> it could be that the hash is so weak not the detect.

Something else to consider about "hash": you won't generally hear it 
from the audio output of an HD radio. "Hash" is digital data being 
received on an analog receiver, right? You hear it as static because the 
analog receiver doesn't know what else to do with it. But an HD radio's 
DSP *knows* what to do with it and knows not to pass it out as analog 
noise, so it will either mute on the adjacent channel or even use the 
DSP to do some really advanced filtering to pull out analog 
adjacent-channel audio from right under the digital data.


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