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pothosware / PothosSDR

Pothos SDR windows development environment
https://github.com/pothosware/PothosSDR/wiki
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PothosSDR osmocom, another bug ? #64

Closed pietro62 closed 5 years ago

pietro62 commented 5 years ago

Hello,

after being able to run SDRPlay hardware with osmocom source (soapy=4,driver=sdrplay) on bundled GnuRadio (installer version 2019.01.26) see me other post (thank you very much for your effort, bb gain must be < 10), probably I found another bug with this configuration: with any sample rate ( 2, 2.048, 5 msps etc) on a simple RX with osmocom and FFT sink, I got only the center +/- 200 kHz spectrum, nothing else (see picture 1). I try any possible config on osmocom block but nothing help. Very frustrating. The strange thing is that after being using GRC with this behavior, closing GRC and starting GQRX, I have the same problem and situation: small bandwidth !!! Only solution is to change GQRX to other input rate (see pictures 2 and 3). Any help please ?

bug_1 bug_2 bug_3

pietro62 commented 5 years ago

Update: the very same happens on fresh W7-x64 install starting GQRX. Every start il like image 2, changing Input Rate on control panel, solve the problem as you might see on image 3 .... mumble mumble ...

pietro62 commented 5 years ago

Update: I think, when installing & using GQRX or GNUradio with Osmosdr module, the default value for BandWidth is set to 0.0000 MHz. As result I had a small RF bandwith as in picture nr. 1 and 2. So it's necessary to set this value to 1.536 MHz or more to achieve good results, as depicted here below.

bandwidth

guruofquality commented 5 years ago

There is nothing I can do about defaults in these programs or how the software bounds checks. You will have to take this up with the specific issue tracker or make a pull request with the fix.