Hello Rik,
I have just installed MMTTY and playing with the settings and need one more
chance for decoding....
Vy 73 de Gerhard // DK6NI
===========
-----Ursprüngliche Nachricht-----
Von: [email protected]
[mailto:[email protected]] Im Auftrag von Rik Strobbe
Gesendet: Dienstag, 5. Mai 2009 22:56
An: [email protected]
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" <[email protected]>:
>
> Hello Rik,
>
> Your signal is fine visible on my waterfall, but with deep QSB-Phases.
>
> Vy 73 de Gerhard // DK6NI (JN59LN)
>
> ==============================
>
>
>
>
>
> -----Ursprüngliche Nachricht-----
> Von: [email protected]
> [mailto:[email protected]] Im Auftrag von Rik Strobbe
> Gesendet: Dienstag, 5. Mai 2009 22:15
> An: [email protected]
> 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 <[email protected]>:
>
>> 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 <[email protected]>:
>>
>>> 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: [email protected]
>>> [mailto:[email protected]] On Behalf Of Rik Strobbe
>>> Sent: 05 May 2009 16:26
>>> To: [email protected]
>>> 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: [email protected]
>>>>> [mailto:[email protected]] On Behalf Of Rik Strobbe
>>>>> Sent: 04 May 2009 22:37
>>>>> To: [email protected]
>>>>> 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 <[email protected]>:
>>>>>
>>>>>> 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: [email protected]
>>>>>> [mailto:[email protected]] On Behalf Of Rik Strobbe
>>>>>> Sent: 04 May 2009 21:10
>>>>>> To: [email protected]
>>>>>> 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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