Dave,
What did you find as the "sweet spot" for the FW setting?
73, Jeff ACØC
www.ac0c.com
-----Original Message-----
From: Dave AA6YQ
Sent: Saturday, January 15, 2011 3:17 PM
To: Jeff Blaine
Cc: rtty@contesting.com
Subject: RE: [RTTY] Best MMTTY profile for noise and weak signals?
>>>AA6YQ comments below
-----Original Message-----
From: rtty-bounces@contesting.com [mailto:rtty-bounces@contesting.com]On
Behalf Of Jeff Blaine
Sent: Saturday, January 15, 2011 3:58 PM
To: dezrat1242@yahoo.com; Dick Flanagan
Cc: rtty@contesting.com
Subject: Re: [RTTY] Best MMTTY profile for noise and weak signals?
>snip<
In addition, there is some amount of power in the sidetones which - with a
tight filter - will be cut out as well and will degrade the useable SNR.
>>>Empirically, the 512-tap FIR filter consistently yields a higher decoding
accuracy for -10 db SNR RTTY than does any wider filter. This determination
was made using Moe AE4JY's Pathsim (with no multipath) and Alex VE3NEA's
RTTYCompare applications.
73,
Dave, AA6YQ
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