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Garry NicholsPosted - 26 June 2013 8:48  Show Profile  Email Poster  Edit Message

I think that you are saying that digital demod will benefit from 2 dB if it is within the specified operating range of the "detector", which can be adjusted by design. But that the human ear/brain covers such a large range of amplitude handling in ordinary not-adjustable operation that 2 dB is a tiny portion of it. Perhaps too tiny to be significant.

I wonder if it makes any difference to the human ear whether the 2 dB change is at a soft, medium or loud listening level?

Did you (or anyone) ever hear of the "2 dB is worth going after" rule in HF analog communications? Or do I remember something outdated or originally incorrect?


homebrewPosted - 27 June 2013 5:57  Show Profile  Email Poster  Edit Message  
Originally incorrect.
Worth it depends on your goals, budget, time available, and personal listening preferences.
Garry NicholsPosted - 27 June 2013 6:59  Show Profile  Email Poster  Edit Message
I remember this 2 dB "worth it" comment as applying to commercial HF circuits.

I'll have to see if I can find where this came from. Maybe an older ARRL Antenna Book.

The League is not always the "last word" on technical topics . . . .


_J_Posted - 27 June 2013 20:35  Show Profile  Email Poster  Edit Message
Yea Garry, exactly, but I misspoke when I said 'digital' I shoulda said 'electronic'. Just got digits in my brain. Nothing special about digital. (Sorry Zim!) :-)

John Davidson

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