One for Peter: Tentative San Marino 102.7

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John Faulkner, Skegness
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One for Peter: Tentative San Marino 102.7

Post by John Faulkner, Skegness » 05 Sep 2015 01:29

http://www.mediafire.com/listen/r1zxhix ... 2.7%29.wav

The RDS is struggling to form here but I wonder if I could enlist the help of Peter and his ultra-sensitive RDS decoding setup?

On 102.7, there is a three second meteor burst in which an Italian speaker mentions San Marino. Now we all know that doesn't mean to say that it is San Marino, but I see a 10kW RSM station listed for 102.7, so I wonder if this actually is San Marino. RDS Spy starts to acknowledge data and the BER numbers start to roll, but I guess the signal just isn't strong enough to reveal a PI code.

If you have the time Peter, it would be nice to see if you can drag anything else out of this. It's a small (120 MB) wav file.

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pe1etr
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Re: One for Peter: Tentative San Marino 102.7

Post by pe1etr » 05 Sep 2015 02:41

Hello John,

There is something wrong with this file. The whole spectrum jumps up, including the locals.(I've noticed this on some of your files before).

I used to get San Marino with RDS via MS on an East/West dipole in Hull in 1999.

Peter

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John Faulkner, Skegness
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Re: One for Peter: Tentative San Marino 102.7

Post by John Faulkner, Skegness » 05 Sep 2015 11:50

Not sure what you mean by "jumps up". The file plays fine here.

Thanks for trying this anyway. I assume this has nothing to do with the recent fix on the file cropping facility if previous files have done this. I wish I could help more but I don't know what's happening to my files.

As far as I can remember, I've never had San Marino at any time so this would be a nice little catch.

Just looping this file through again as I type but the RDS on 102.7 isn't trying to form at all today. 105.1 has just revealed 5215, which it didn't yesterday. I don't know why these things are so variable. Maybe 102.7 will give full RDS later. :roll:

Going to make a start on this morning's files now.

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Re: One for Peter: Tentative San Marino 102.7

Post by satnipper » 05 Sep 2015 15:36

File plays ok here as well tho no luck with any RDS decodes on either 102.7 or 105.1

Stuart

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Re: One for Peter: Tentative San Marino 102.7

Post by John Faulkner, Skegness » 05 Sep 2015 17:11

Thanks for trying Stuart.

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pe1etr
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Re: One for Peter: Tentative San Marino 102.7

Post by pe1etr » 06 Sep 2015 00:27

I meant the problem is in SDR#. This makes it difficult to tune the frequency, especially as there is not a proper MHz scale.

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Re: One for Peter: Tentative San Marino 102.7

Post by pe1etr » 06 Sep 2015 01:15

I played the file through HDSDR/RDS Spy and got the following:

100.6 5218
105.3 5220

For playback in SDR# it is best if you include a lead in of several seconds on the recording of an MS burst.

Peter

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John Faulkner, Skegness
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Re: One for Peter: Tentative San Marino 102.7

Post by John Faulkner, Skegness » 06 Sep 2015 01:31

100.6: I spent some time on this one as it looked like it would RDS, but it didn't.
105.3: Again, this didn't RDS with me, but I did catch 5E49 on 105.3 at 0729.

Regarding having a lead-in, I have noted this works also with the FDM-S2 > RDS Spy. I guess this relates to a small lag with this being digital. I'll make sure I include more in future files.

Thanks again.

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Re: One for Peter: Tentative San Marino 102.7

Post by daveB » 06 Sep 2015 15:48

[quote][For playback in SDR# it is best if you include a lead in of several seconds on the recording of an MS burst./quote]

I've found that by starting the playback at a slightly different time it can help RDSSpy produce a PI code on a very marginal signal when the previous playback produced nothing - so a few seconds lead in time would definitely help.

I've been able to make very good use of the latest File Player plug-in is SDR Sharp with the waterfall opened out as far as practicable. I think 16 stations identified in 4.4 MHz bandwidth is the most I've managed. That particular burst was fairly short and replaying some frequencies was needed to eventually produce a PI code. Log is here: http://www.fmlist.org/fm_logmap.php?dat ... &omid=2414

Rgds

David
SDRPlay, AirSpyMini, RTL dongles, SB920s, Yamaha TX930. 5 ele compact yagi on rotator at 18ft agl. FM5 facing east, FM5 facing south, FM3 facing NE, OIRT dipole, 3-ele Moxon vertical facing east.

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Re: One for Peter: Tentative San Marino 102.7

Post by Tim Bucknall » 16 Sep 2015 11:42

RTL 102.3
102.5 x2
&102.6
Home:Burkhardt Reuter RDR54D1 SDR V.415,
+ CLP 5130 Log P ant

Mobile: Comm Radio CR-1 + Sharman Skyscan ant, Pira P275

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John Faulkner, Skegness
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Re: One for Peter: Tentative San Marino 102.7

Post by John Faulkner, Skegness » 16 Sep 2015 12:21

Thanks David / Tim.

I am hoping San Marino comes through somewhere on my remaining sporadic E files. There's still lots to check through and I am barely making inroads into them at the moment. More time needed, as usual.

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