Search found 49 matches

by AH6DL
Sat Jun 20, 2015 7:00 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

Thanks Jon! By the way, I found adding mir_sdr_SetDcTrackTime(63) after every mir_sdr_SetDcMode(4,1) pretty much eliminates the DC carrier. mir_sdr_SetDcMode(4, 1); mir_sdr_SetDcTrackTime(63); We're very close -- I think there is a decimation occurring somewhere (not sure if it is GQRX or gr-osmosdr...
by AH6DL
Sat Jun 20, 2015 6:03 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

Partial success!! I compared the SDR-J code with the gr-osmosdr sdrplay_source.c.cc and found if I changed the 4096.0f in the output portion of the code to 32768.0f I had fewer hits. SDR-J only uses 32768.0f. I don't know enough about the API to know why 4096.0f was used in some cases and 32768.0f ...
by AH6DL
Fri Jun 19, 2015 6:27 am
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

After hearing Kg7bux's better luck with GQRX and the miri driver, I gave it a try. It seemed a bit more stable, but using 1536e3 and 2e6 sample rates I saw USB buffer overflow messages. I hadn't noticed those on GRC but that certainly could cause the problems we've been seeing. The SDRplay didn't co...
by AH6DL
Wed Jun 17, 2015 5:54 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

I'm happy to see SDRplay Tech_Support is working on this, as I've exhausted all the simple source code changes to test that I could find. Also happy to hear we don't need to send Dimitri an SDRplay! Kg7bux, thanks for the tip on the mirics source. I'm having a hard time following what's going on in ...
by AH6DL
Tue Jun 16, 2015 9:34 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

Another update -- I tried changing the buffer size in the gr-osmosdr/lib/sdr source code from 504 all the way up to 16384 and didn't see any noticeable change, so that isn't the issue. At times I thought it was improving, but comparing the 504 version to the 16384 byte versions didn't make a differe...
by AH6DL
Tue Jun 16, 2015 3:06 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

Here's an update on where I stand trying to get gr-osmosdr to work with the SDRplay. Adding the additional lines I mentioned in the last email didn't help. I now think the problem output packets are getting lost or corrupted. Doing some testing with a sample GRC program (SDRplay source box and FFT s...
by AH6DL
Sun Jun 14, 2015 8:34 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

Re: SDRplay with gr-osmosdr: a few answers, many questions

I may be headed down the wrong path, but to me it appears the gr-osmosdr sdrplay module is not providing the correct initialization to the API. Here is the terminal readout from the sdr-j-fm-receiver-0.98 initialization: mir_sdr_Init: starting hardware initialization mir_sdr_Init: gR=40dB fs=2.000MH...
by AH6DL
Sun Jun 14, 2015 6:52 pm
Forum: SDRplay related
Topic: SDRplay with gr-osmosdr: a few answers, many questions
Replies: 18
Views: 28150

SDRplay with gr-osmosdr: a few answers, many questions

I've been doing some more work trying to get SDRplay working with gr-osmosdr and think I've uncovered some of the reasons why people are having trouble making it work with gqrx and other GNUradio based software that relies on gr-osmosdr. The problem appears to be the way gr-osmosdr initializes the S...
by AH6DL
Sun Jun 14, 2015 7:47 am
Forum: SDRplay related
Topic: SDRplay under Linux (Arch): Failure and Success
Replies: 0
Views: 6503

SDRplay under Linux (Arch): Failure and Success

I received my SDRplay yesterday and have managed to get it up and running with Arch Linux. The first thing I found is that the SDRplay Linux API would not install under Arch Linux. I was able to compile it using Ubuntu 14.04.2 (LTS) in a virtual machine and then copy the files from the /usr/local/li...