When I run into a strong signal that will not copy often turning down the
audio level (even if over driven is not displayed) will improve the
On Mon, 31 May 2004 13:10:51 -0500 "Don Hill AA5AU" <firstname.lastname@example.org>
> Hello Jacques,
> I've not experienced MMTTY not copying strong signals, regardless of
> over the pole or multi-path.
> I always use the profiles that come with MMTTY. I have played
> around with
> different settings but have not seen any significant differences to
> the default
> profiles for standard, flutter or multi-path.
> I've found the Standard profile works well for about 95% of RTTY
> signals. From
> here, UA9, UA0 and occasionally OH stations are fluttered and
> require switching
> to one of the two flutter profiles. Also, I occasionally use the
> profile to copy KK5OQ, who is in the next state of Mississippi.
> Otherwise, I
> rarely need to use the multi-path profile.
> I've also found that my HAL DXP-38 handles fluttered signals better
> than MMTTY.
> I have an educated guess that expanding the passband helps fluttered
> I cannot explain why you would not be able to copy a strong signal
> with MMTTY.
> 73, Don AA5AU
> -----Original Message-----
> From: Jacques RAMBAUD [mailto:email@example.com]
> Sent: Monday, May 31, 2004 11:15 AM
> To: Don Hill AA5AU; firstname.lastname@example.org
> Subject: Re: [RTTY] signals over the pole
> Don and the group,
> I take the oportunity of having RTTY experts on this reflector to
> bring again
> the issue of decoding signals comming from the pole .Sometimes
> signals are 10 to
> 20dB above noise but no copy!!
> Our experience is that MMTTY and TNCs (KAM /PKs) are quite close
> sometimes one
> is better than the others but not by much.
> We do not see much difference with MMTTY between the standard,
> flutered ,
> multipath option , may be we have not found the right parameters ,
> can somebody
> help in this respect ??
> I remember a friend mentioning a relatively old US TNC maybe semi
> maybe for military applications that was quite good to copy this
> kind of signal
> , any comments ?? any other strategy like antenna diversity ?
> Thank you all , 73
> Jacques F6BKI
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