Re: Serious question


Stephen Melachrinos
 

I usually quote a signal quality "at the peaks" and then say there's QSB.

Steve
W3HF


-----Original Message-----
From: DAVE KB3RAN 1692/381 via groups.io <davehardy0101@...>
To: n9avy@... <n9avy@...>; main@070Club.groups.io <main@070Club.groups.io>
Sent: Mon, Dec 28, 2020 10:46 am
Subject: Re: [070Club] Serious question

Does a 599 count when the overall signal is really good but qsb garbles the message?  I need to review what constitutes the RST values again.

Dave
KB3RAN
1692/381
APE Event Mgr


-----Original Message-----
From: Jerry N9AVY <n9avy@...>
To: main@070Club.groups.io <main@070Club.groups.io>
Sent: Mon, Dec 28, 2020 10:40 am
Subject: Re: [070Club] Serious question

Love it when a station gives me a 599 and keeps asking for fill....  Emoji

Jerry  n9avy

On Monday, December 28, 2020, 09:33:23 AM CST, John - KC3FL via groups.io <kc3fl@...> wrote:


One of my favorite subjects.  An RSQ is an arbitrary number that the op makes up.  Some give a meaningful RSQ but most give the 599.  S/N and IMD are real numbers that your software generates and tells all about the signal.  The IMD without the S/N is useless because if the S/N is 15 dB and the IMD is -15 dB, that is a great  signal, however if the S/N were 30 dB and the IMD was -15 dB, that is being over driven and probably is 2 or 3 hundred Hz wide.  The closer the IMD is to the negative value of the S/N, the cleaner the signal because all the harmonics are suppressed.  Unfortunately the software has a tough time getting the IMD right as you can tell as the IMD figure usually jumps around.


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Dave H KB3RAN 1692/381

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