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pavel-demin / red-pitaya-notes

Notes on the Red Pitaya Open Source Instrument
http://pavel-demin.github.io/red-pitaya-notes/
MIT License
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Skimmer Spots on both 15 and 10 m #265

Closed w2naf closed 8 years ago

w2naf commented 8 years ago

Hi, Pavel.

I set up a Red Pitaya-based Reverse Beacon Network skimmer this weekend, and overall was extremely impressed. For the most part, it worked beautifully.

However, I received a report from another ham saying that my receiver spotted them on 10 m even though they were transmitting on 15 m. They said that the reported kHz was correct, but the MHz was not.

I was able to replicate this today. By calling CQ de K2MFF on 21035 kHz. My skimmer (W2NAF) reported spots on both 21035 and 28035 kHz (see attached screenshot).

Do you know how to resolve this?

Thanks and 73, Nathaniel, W2NAF

screen shot 2016-06-02 at 2 52 08 pm

pavel-demin commented 8 years ago

Hi Nathaniel,

Thanks for spotting this problem. Could you please send me screenshots of the CW skimmer settings?

Best regards,

Pavel

pavel-demin commented 8 years ago

Found it. data4 should be replaced with data5 on lines 348 and 380 in sdr-receiver-hpsdr.c.

G4DCP commented 8 years ago

I think I have seen this on the wspr receiver as well, is that possible given what you have discovered?

pavel-demin commented 8 years ago

I think I have seen this on the wspr receiver as well, is that possible given what you have discovered?

If you're talking about the multiband WSPR transceiver, then the code in write-c2-files.c isn't the same. It's currently running on my Red Pitaya without any problem.

Could you please provide more details about the problem that you observed?

pavel-demin commented 8 years ago

I've fixed the problem with commit https://github.com/pavel-demin/red-pitaya-notes/commit/c76ef2ff918b296b177eee7b563f5da89e6e43d4 and updated the customized SD card image zip file.

Could you please check if the new version works better?

w2naf commented 8 years ago

Hi, Pavel. Thank you so much. I just tested it out, and it looks like it is working great! I really appreciate you writing this SDR program.

Incidentally, I am working on a project called HamSCI, the Ham radio Science Citizen Investigation. We are going to encourage more people to set up RBN nodes and then work on getting ionospheric science out of the data set. See http://hamsci.org http://hamsci.org/ and http://hamsci.org/eclipse http://hamsci.org/eclipse.

73, Nathaniel, W2NAF

pavel-demin commented 8 years ago

Thanks for the test.

We are going to encourage more people to set up RBN nodes

Are you planning to use only CW skimmer or some other systems/protocols like for example WSPR?

w2naf commented 8 years ago

You're welcome.

I'm going to start by focusing on Skimmer, but hopefully will fold in things like WSPR eventually, too.