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From: "Graham" <g8fzk@g8fzk.fsnet.co.uk>
To: <rsgb_lf_group@blacksheep.org>
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Date: Mon, 4 May 2009 23:35:58 +0100
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Subject: Re: LF: RE: rtty test
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Rik,

Looking at  fldigi , the  MFSK-4  looks to be  100 Hz wide ?
may be a little  slow, but  will print , the MFSK mode is also
more robust than OLIVIA. (olivia is showing at  125 Hz Bw minimum)

The lower 'throb' modes also show under 100 hz , but ive never
used them

>From the  test's   I ran over the last year or so , the MFSK system looked
to  work the best on 500

Gary ran a lot of beacons with  23 hz rtty , with  varying results ,
reducing the baud rate by 50% lowers the error  rate as well

psk31 , works quite  well, but  dose not  seem to  travel too well on
500, but  looking at the  results of the propagation test using the
zl2afp  system, phase modulation may not of been a good  choice !

Of all the data system , narrow 2 tone fsk  (23) is perhaps the most
fragile

GL de G0NBD

hi



--------------------------------------------------
From: "Rik Strobbe" <Rik.Strobbe@fys.kuleuven.be>
Sent: Monday, May 04, 2009 10:36 PM
To: <rsgb_lf_group@blacksheep.org>
Subject: Re: LF: RE: rtty test

>
> Hello Gary,
>
> call the is almost right, locator completely.
> But not really impressive for 500mW ERP.
> I could see my signal on your grabber, some slow QSB but strong for
> the last 2 minutes or so.
> I used MTTY with the profile "23Hz RTTY (MTTY)" without any further
> changes, not sure that this is the best mode.
> So any advice is welcome.
> I have also installed MultiPSK, but am still overwhelmed by the colors
> and options.
> I am allowed to use any digital mode as long as I stick to max. 100Hz
> bandwidth.
>
> 73, Rik  ON7YD - OR7T
>
>
>
> Quoting Gary - G4WGT <g4wgt@tiscali.co.uk>:
>
>> Hi Rik,
>>
>> This is the best I could do, it looks like almost your call sign & 
>> locator
>> :-
>>
>> RHTQHTST DE TC(TIOJ7T OR1T JO20IX
>>
>> 73
>>
>> Gary - G4WGT.
>>
>> -----Original Message-----
>> From: owner-rsgb_lf_group@blacksheep.org
>> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Rik Strobbe
>> Sent: 04 May 2009 21:10
>> To: rsgb_lf_group@blacksheep.org
>> Subject: LF: rtty test
>>
>> dear all,
>>
>> I will run a short (10 minute) rtty test (23Hz shift) on 503.500 at 21UTC
>> Reports and/or reply welcome.
>>
>> 73, Rik  ON7YD - OR7T
>>
>>
>>
>
>
>
>



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