From: "Beckmann, Gerhard" <beckmann.erlangen@freenet.de>
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> <20090505225610.msbh1wypf7cws8ks@webmail4.kuleuven.be>
Date: Tue, 5 May 2009 23:32:29 +0200
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Subject: AW: AW: LF: RE: rtty test
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Hello Rik,

I have just installed MMTTY and playing with the settings and need one more
chance for decoding....

Vy 73 de Gerhard  //  DK6NI

=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
=20

-----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 using
>>> 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 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
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>
>>>
>>>
>>>
>
>
>
>
>
>
>