[RTTY] MMTTY RXlmsNotch setting?

[Ian White GM3SEK]

Hello Dave

>The documentation for RXlmsNotch says "Audio frequency of Notch 1", which I
>interpret to mean the absolute audio frequency of the first notch. If this
>interpretation proves to be incorrect, let me know and I'll look into the
>MMTTY code to see what it actually does.
>
Here is a list of all the profiles, with the initial state of RXlms and 
the initial notch frequency. The only ones that seem to make sense are 
mid-way between the two tones at 2125 + 85 = 2210Hz, so I'm presuming 
that with 1275Hz mark all the notches should be positioned at 1360Hz?


Name=Standard RTTY
RXlms=0
RXlmsNotch=2136

Name=Fluttered signals
RXlms=0
RXlmsNotch=2136

Name=Fluttered signals (FIR)
RXlms=0
RXlmsNotch=2096

Name=23Hz RTTY (MTTY)
RXlms=0
RXlmsNotch=2210

Name=Multi-path
RXlms=0
RXlmsNotch=2094

Name=EU1SA
RXlms=1
RXlmsNotch=2210

Name=AA6YQ
RXlms=1
RXlmsNotch=2210

Name=hyper sensitive
RXlms=1
RXlmsNotch=2211

Name=Default
RXlms=0
RXlmsNotch=2210

Name=Return to the startup
RXlms=0
RXlmsNotch=2210

All profiles:
RXlmsNotch2=0
RXlmsTwoNotch=0






73 from Ian GM3SEK

>-----Original Message-----
>From: rtty-bounces at contesting.com [mailto:rtty-bounces at contesting.com] On
>Behalf Of Ian White GM3SEK
>Sent: Wednesday, February 11, 2009 1:03 PM
>To: rtty at contesting.com
>Cc: aa6yq at ambersoft.com
>Subject: [RTTY] MMTTY RXlmsNotch setting?
>
>
>Thanks to Dave AA6YQ for hosting the extended set of MMTTY profiles, at:
>
>www.dxlabsuite.com/winwarbler/Profiles/UserPara.ini
>
>I'm trying to edit all of these profiles for a mark frequency of 1275Hz,
>and the only parameter that isn't clear is RXlmsNotch. In the original
>file, this parameter takes various values both above and below the
>default mark frequency of 2125Hz.
>
>Should I simply use the same offsets above and below the new mark
>frequency, or is there a more subtle rationale?
>
>

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