Search found 70 matches

by DK7OB
Sat Jan 28, 2017 7:12 pm
Forum: New Users' experiences
Topic: CubicSDR working fine, Gqrx not so good.
Replies: 7
Views: 5758

Re: CubicSDR working fine, Gqrx not so good.

Got soapy working with gqrx needed to change the driver string to 'driver=sdrplay,soapy=0' now to work out how to change the antenna. Seems to be unsupported: /******************************************************************* * Antenna API *********************************************************...
by DK7OB
Sat Jan 28, 2017 8:31 am
Forum: New Users' experiences
Topic: CubicSDR working fine, Gqrx not so good.
Replies: 7
Views: 5758

Re: CubicSDR working fine, Gqrx not so good.

I am running gqrx with the soapysdr (not the gr.osmosdr non free) driver and have seen this same behavior. gqrx sets the default bandwidth to 0 and expects that in this case the driver calculates the optimum bandwidth for the configured sample rate (I think that's a gnu-radio convention). With soapy...
by DK7OB
Thu Jan 05, 2017 1:13 pm
Forum: Code Corner
Topic: SoapySDDRPlay not working
Replies: 16
Views: 11340

Re: SoapySDDRPlay not working

Yes, all of our changes were pushed back into the main SoapySDRPlay github repository. Thanks a lot! It's working fine here with gnuradio and gqrx. The new gain setting is much better than the old one. The audio latency seems to be smaller now, but this is not confirmed by measurements yet. At leas...
by DK7OB
Wed Jan 04, 2017 7:22 pm
Forum: Code Corner
Topic: DC removal not working with API 2.09
Replies: 2
Views: 2713

Re: DC removal not working with API 2.09

The DC removal was working, but due to a problem in gqrx it could not be disabled. This is now fixed. But still the DC spike is much more visible than with API 1.97 and matching soapysdrplay. The spike is even worse with gain reduction at maximum. I attach 3 screen shots: 1. DC correction disabled 2...
by DK7OB
Wed Jan 04, 2017 11:30 am
Forum: Code Corner
Topic: DC removal not working with API 2.09
Replies: 2
Views: 2713

DC removal not working with API 2.09

I am running gqrx on Ubuntu 16.04. After I updated to API 2.09 and newest SoapySDRPlay from github the DC correction does not work any more. I see a DC spike in the spectrum which was not the case with the API 1.97. If I enable DC removal in gqrx, I get the following output on the console: mir_sdr_S...
by DK7OB
Wed Jan 04, 2017 10:40 am
Forum: Code Corner
Topic: SoapySDDRPlay not working
Replies: 16
Views: 11340

Re: SoapySDDRPlay not working

Just to make sure that I am working with the latest SoapySDRPlay: This commit in github cae555 Updates for API 2.09 including RSP1 and RSP2 contains all the work done by the sdrplay team? It's working for me (Ubuntu 16.04 and gqrx 2.6 + modifications) and I noticed the ppm correction is now implemen...
by DK7OB
Wed Dec 28, 2016 12:04 pm
Forum: SDRuno
Topic: daul band
Replies: 3
Views: 2577

Re: daul band

Hi,

Simultaneous reception of 20m and 17m should basically work, since both bands are in the 5 MHz frequency range you get with 10 MHz sampling rate and LO set to 16 MHz.

I can not test with SDRUno since I am running Linux with gqrx. See attached screenshot.

Regards,
Wolf, DK7OB
by DK7OB
Sat Dec 24, 2016 11:58 am
Forum: General
Topic: SAQ Christmas Transmission with RSP1
Replies: 2
Views: 2358

SAQ Christmas Transmission with RSP1

I recorded the SAQ Christmas transmission on 17.2 kHz with my RSP 1. Antenna was a home made PA0RDT mini whip active antenna.

https://www.youtube.com/watch?v=GiE0Ty2R26k

Merry Christmas,
Wolf, DK7OB
by DK7OB
Fri Dec 23, 2016 8:22 am
Forum: New Users' experiences
Topic: High noise floor on RSP2??
Replies: 5
Views: 4386

Re: High noise floor on RSP2??

Did you try to reduce the gain on the RSP? The RSP has a limited dynamic range and can be easily overdriven with a good broadband antenna if gain is set too high. In this case the noise floor increases dramatically. How to reduce the gain depends on the SDR software you are using. I am running gqrx ...
by DK7OB
Wed Dec 07, 2016 6:44 am
Forum: SDRuno
Topic: Why so much delay?
Replies: 3
Views: 3281

Re: Why so much delay?

Half a second is quite a lot of delay. I am using the SDRPlay on Linux, mostly with gqrx but I also tested CubicSDR. I also see quite a lot of delay and did some measurements (triggering a dual channel digital oscilloscope with the RF pulse at the SDRplay antenna input and looking at the demodulated...

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