[RTTY] FSK Readouts vs AFSK

[Al Kozakiewicz]

I'm not 100% sure I'm following the point, but if the point is that you can decide to decode something other than 2125/2295 when running AFSK in order to make the math for the conversion to the "FSK frequency" simple to do in your head, why not?  When I was first trying RTTY and running AFSK I never ran the standard part because 2295 Hz was usually just outside my SSB filter passband.

If you're using AFSK, you will probably eventually want to use a narrow SSB filter whose upper limit will end up being lower than 2kHz anyway, forcing you to change to a different tone pair.  From a technical standpoint, it doesn;t much matter at all what tone pair you choose as long as the separation is 170 Hz.

Al
AB2ZY

________________________________________
From: rtty-bounces at contesting.com [rtty-bounces at contesting.com] On Behalf Of Bill [bmarx at bellsouth.net]
Sent: Monday, February 06, 2012 3:44 PM
To: RTTY reflector
Subject: [RTTY] FSK Readouts vs AFSK

Someone sent me this comment when the subject of FSK readouts came up.
Any thoughts on his plan?

"You don't have to pick the 2.1 kHz offsets for tones, I use the
915/1085 (that is, 1 kHz +/- 85 Hz) to make the spotting arithmetic easy
(about 1 kHz)."

Bill Marx W2CQ
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