Search found 24 matches

by n2ic
Sat Jul 21, 2018 9:22 pm
Forum: SDRplay related
Topic: N1MM/waterfallbandmap
Replies: 1
Views: 518

Re: N1MM/waterfallbandmap

I am the author of waterfall bandmap. Please send me a direct e-mail at n2ic aaaat arrl.net .
by n2ic
Fri May 25, 2018 4:06 pm
Forum: SDRplay related
Topic: RSPduo dual API question
Replies: 6
Views: 1174

Re: RSPduo dual API question

Didn't find the RSPduo API spec or API binary on the Downloads page. Where can I find it ? I now have a (free) DLL for the RSP1, 1A and 2 that works with the Afreet Skimmer Server. No doubt, changes will be needed to support the duo.

Thanks,
Steve
by n2ic
Fri Apr 27, 2018 2:44 pm
Forum: SDRplay related
Topic: Skimmer Server support for SDRPlay RSP's
Replies: 1
Views: 1100

Skimmer Server support for SDRPlay RSP's

VE3NEA's Skimmer Server (http://www.dxatlas.com/skimserver/) now supports the RSP1, RSP1A and RSP2 using the driver at http://www.kkn.net/~n2ic/SDRPlayIntf.zip . This provides an easy way to get local CW or RTTY spots using your SDRPlay device, and send the spots to the Reverse Beacon Network (http:...
by n2ic
Thu Apr 12, 2018 7:33 pm
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

Thanks to Steve Andrews and the SDRPlay staff for their help. After some hair-pulling, I now have a DLL working using the mir streaming API that samples and decimates to 192 kHz, feeding I/Q samples to VE3NEA's Skimmer Server ( http://www.dxatlas.com/SkimServer/ ). I plan to make this available for ...
by n2ic
Wed Mar 28, 2018 1:31 am
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

Thanks ! I think I see what to do now. It helps to walk away and think about these things for a while.
by n2ic
Tue Mar 27, 2018 10:31 pm
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

At the risk of showing just what a poor developer I am ...

Can anyone point me to C++ code that uses mir_sdr_StreamCallback ? I have looked at Steve Andrew's C# code, and have spent a day trying to figure out how to do that callback in C++.

Thanks,
Steve L
by n2ic
Mon Mar 26, 2018 1:10 am
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

Thanks for the response. My concern is that streamcbfunc is going to start receiving I/Q samples before mir_sdr_DecimateControl has been acted upon by the API. Therefore, the upstream user of the I/Q samples doesn't know when the samples reflect the requested sampling frequency/decimation factor. So...
by n2ic
Sun Mar 25, 2018 1:30 pm
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

Hi Steve, I noticed the reversed StreamInit/Decimate function calls, but thought it might actually be correct. Once you call StreamInit, it's off to the races - the API immediately starts sending samples, probably with decimation = 1. Can you really change the decimation at this point ? This is anot...
by n2ic
Sat Mar 24, 2018 3:02 pm
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Re: Resampling

Hi Steve, Thanks for the code - that is a huge help. A few questions/comments for you and/or the SDRPlay team: - When in the LowIF mode, why can't the decimation be user specified ? The man page says: "Also for IQ output in Low IF mode, enable must = 0 as the decimation is automatic within the ...
by n2ic
Fri Mar 23, 2018 8:26 pm
Forum: Code Corner
Topic: Resampling
Replies: 14
Views: 5058

Resampling

I have an application that needs I/Q data at 192 kHz. The lowest that the RSP's go is 500 kHz. I don't need any FFT or demodulation - I just need 192 kHz I/Q. Resampling ? Suggestions on how to do this in software ?

Thanks,
Steve

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