[RTTY] Upside down

[Robert Chudek - K0RC]

Gary,

Yes you can "re-decode" a RTTY signal using MMTTY. I do this when I make 
RTTY presentations at local clubs.

I am not certain how Writelog records RTTY signals, so someone else will 
have to fill in the details. Maybe it has a built-in playback feature, I 
don't know.

But... if Writelog creates a standard WAV file (or it can be converted 
into a WAV file), you can use the Windows Media Player to play the file. 
Then have MMTTY running and it will decode the audio it hears that is 
coming from Media Player.

Actually, the file type can be any format that Media Player (or any 
other Audio program) can understand and play, for example an MP3 file. 
For my presentations, I record "off air" signals using the Audacity program.

73 de Bob - KØRC in MN



On 2/14/2011 12:46 PM, Gary AL9A wrote:
> Further question on this topic.  I use WriteLog and recorded the WPX
> contest.  Is there a way to feed the last few minutes of the last recorded
> wav file to MMTTY so that I can try using the REV button to see if the
> calling station was indeed upside down?  If so, and it turns out that he was
> upside down and I can get his call decoded, I will try to email him and let
> him know why I couldn't get him in the log.  Maybe then he can check his
> radio settings and set things right.
>
> 73,
> Gary AL9A
>
>
>
> ----- Original Message -----
> From: "Gary AL9A"<al9a at mtaonline.net>
> To: "RTTY Contesting"<rtty at contesting.com>
> Sent: February 13, 2011 8:23 PM
> Subject: [RTTY] Upside down
>
>
>> During the contest I was repeatedly called by some poor soul whose entire
>> string was nothing but garbage.  I knew it was the same station each time
>> because in the middle of each garbage string were the characters
>> ...s901...
>> I could not decode anything and even though I sent several messages
>> stating
>> that I could not decode the station calling me he kept calling over and
>> over.  This happened several times during the contest and right at the end
>> he was the last station that tried to work me.
>>
>> Being a bit slow on the draw sometimes it finally dawned on me too late
>> that
>> the guy might be sending upside down.  By that time though it was all
>> history and I couldn't verify my suspicion.  I don't think I've ever run
>> across an upside down signal before so I'm not sure what I should have
>> done.
>> If I hit the REV button in MMTTY would it then decode his signal?  If he
>> was
>> indeed upside down, how could he copy my call and exchange?  If this
>> happens
>> again should I tell to other the op to hit his REV button to see if it
>> corrects the garbage?  What's the best way to handle this?
>>
>> 73,
>> Gary AL9A
>>
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