Message-ID: <20090505234705.h93clwtj8o8o8kg4@webmail4.kuleuven.be>
Date: Tue, 05 May 2009 23:47:05 +0200
From: Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>
To: rsgb_lf_group@blacksheep.org
References: 	<200904031959.n33Jxrvn028438@smtpa1.mediabeam.com><BLU146-W15B01E5C9585C664E3CD90CF890@phx.gbl><20090504220936.59jcwemhlo004wkk@webmail4.kuleuven.be><01a401c9ccfd$f04e8640$6401a8c0@asus><20090504233650.cpq3ip6kir688ogo@webmail4.kuleuven.be><005d01c9cd6b$620ddc00$6401a8c0@asus><20090505121435.9F59DF3863@smtps02.kuleuven.be><20090505152548.71C37F3865@smtps02.kuleuven.be><00df01c9cdac$e9a407c0$6401a8c0@asus><20090505214422.o47capffyyb4oog0@webmail4.kuleuven.be><20090505221513.oso5g5yn6csgwsw4@webmail4.kuleuven.be><E6471A24F0BE47A19C776A2EEF8581AB@2a2d7ed321c6425>
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Hello Gerhard,

I will do a last transmission at 22:00 UTC
Otherwise we can try tomorrow (WX permitting)

73, Rik

Quoting "Beckmann, Gerhard" <beckmann.erlangen@freenet.de>:

>
>
> Hello Rik,
>
> I have just installed MMTTY and playing with the settings and need one mor=
e
> chance for decoding....
>
> Vy 73 de Gerhard  //  DK6NI
>
> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
>
>
> -----Urspr=FCngliche Nachricht-----
> Von: owner-rsgb_lf_group@blacksheep.org
> [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Rik Strobbe
> Gesendet: Dienstag, 5. Mai 2009 22:56
> An: rsgb_lf_group@blacksheep.org
> Betreff: Re: AW: LF: RE: rtty test
>
> Hello Gerhard,
>
> thanks for the report, did you try to decode the RTTY ?
>
> 73, Rik  ON7YD - OR7T
>
> Quoting "Beckmann, Gerhard" <beckmann.erlangen@freenet.de>:
>
>>
>> Hello Rik,
>>
>> Your signal is fine visible on my waterfall, but with deep QSB-Phases.
>>
>> Vy 73 de Gerhard // DK6NI  (JN59LN)
>>
>> =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D
>>
>>
>>
>>
>>
>> -----Urspr=FCngliche Nachricht-----
>> Von: owner-rsgb_lf_group@blacksheep.org
>> [mailto:owner-rsgb_lf_group@blacksheep.org] Im Auftrag von Rik Strobbe
>> Gesendet: Dienstag, 5. Mai 2009 22:15
>> An: rsgb_lf_group@blacksheep.org
>> Betreff: RE: LF: RE: rtty test
>>
>> Faint traces of my signal are showing up on the G4WGT grabber.
>> I will transmit every 10 minutes starting 20:40 UTC until 21:30 UTC
>> and listen inbetween.
>>
>> 73, Rik  ON7YD - OR7T
>>
>> Quoting Rik Strobbe <Rik.Strobbe@fys.kuleuven.be>:
>>
>>> Hello Gary, LF,
>>>
>>> I just had a first transmission.
>>> I will try short transmissions every 10-15 minutes or so until my
>>> signal shows up un your grabber. Then I will start longer transmissions.
>>>
>>> 73, Rik  ON7YD - OR7T
>>>
>>> Quoting Gary - G4WGT <g4wgt@tiscali.co.uk>:
>>>
>>>> OK Rik,
>>>>
>>>> I will look at the settings you describe in MTTY to allow me to monitor=
,
>> I
>>>> normally use TrueTTY.
>>>>
>>>> Thanks for the info.
>>>>
>>>> Cheers,
>>>>
>>>> Gary - G4WGT.
>>>>
>>>> -----Original Message-----
>>>> From: owner-rsgb_lf_group@blacksheep.org
>>>> [mailto:owner-rsgb_lf_group@blacksheep.org] On Behalf Of Rik Strobbe
>>>> Sent: 05 May 2009 16:26
>>>> To: rsgb_lf_group@blacksheep.org
>>>> Subject: RE: LF: RE: rtty test
>>>>
>>>> Gary, LF,
>>>>
>>>> I just had a look at MMTTY and it seems pretty easy to set it to 50Hz
>>>> shift and 22Bd baudrate.
>>>> The way I did it:
>>>> 1. As a start select 23Hz RTTY (in "Profiles")
>>>> 2. In "Options" select "Setup MMTTY"
>>>> 3. In the tab "Demodulator" change "Shift" from 23 tot 50 (it is not
>>>> a standard option, but you can just type 50 into the field)
>>>> 4. In the tab "Demodulator" change "Mark" to a suitable value (that
>>>> is the audio frequency you get)
>>>> 5. In the tab "Demodulator" change "Discriminator Type" from VCO to FIR
>> BPF
>>>> 6. In the tab "Demodulator" change "Tap" from 72 to 256
>>>> 7. In the tab "Demodulator" click on "OK"
>>>> 8. In the tab "Decode" change "BaudRate" from 45 tot 22 and click "OK"
>>>> Steps 5-7 set demodulator type, the values above are the result of
>>>> some brief dry tests and can most likely still be optimized. You can
>>>> do that in the main screen.
>>>>
>>>> If WX permits (no rain) I intend to run some tests between 20:30 and
>>>> 21:30 UTC on 503.5kHz in mode USB (so if you listen in LSB don't
>>>> forget to select reverse mode).
>>>> I will announce the exact hours later this evening.
>>>> Between transmissions I will listen on the same frequency.
>>>>
>>>> All reports (or replies) are welcome.
>>>>
>>>> 73, Rik  ON7YD - OR7T
>>>>
>>>> At 14:14 5/05/2009, you wrote:
>>>>> Hello Gary,
>>>>>
>>>>> I had a closer look at the 23Hz shift option of MMTTY and it seems
>>>>> to run at 45Bd what is on the edge regarding the shift/baudrate
>>>>> ratio. That is most likely the reason why it is not so robust.
>>>>> Using 45Bd at 85Hz shift would exceed the 100Hz bandwidth limit.
>>>>> I guess the best option for RTTY would be a shift around 50Hz and a
>>>>> lower baudrate (say 20Bd) what would well fit within the 100Hz
>>>>> bandwidth and would have a sufficient shift/baudrate ratio to
>>>>> provide a robust signal.
>>>>> I will see if I can get such signal out of MMTTY and - if time
>>>>> permits - run some tests tonight.
>>>>>
>>>>> 73, Rik  ON7YD - OR7T
>>>>>
>>>>> At 12:22 5/05/2009, you wrote:
>>>>>> Hi Rik,
>>>>>>
>>>>>> You have experienced the same as I did with 23Hz shift, the signal
>> needs
>>>> to
>>>>>> be very strong to decode. It was in the last 2 minutes that I got the
>>>>>> partial decode.
>>>>>>
>>>>>> A much better shift to use is the 85Hz which will fit into your spec.
>>>>>>
>>>>>> I have had good QSO's with Chris G3XIZ in Biggleswade both of us usin=
g
>>>> 85Hz.
>>>>>>
>>>>>> Give that a try next time & I believe I will get a much better decode
>>>>>> judging by the strength of your signal.
>>>>>>
>>>>>> 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 22:37
>>>>>> 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 color=
s
>>>>>> 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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