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Please Help. GQRX and SDR-RTL V3 for HF reception

Posted: Wed Jan 16, 2019 10:03 pm
by cu2ij
Hello

Can you please show a step by step configuration for GQRX in Manjaro linux with the SDR-RTL V3 for HF reception?

In configure I/O devices, the most apropriate device seams Realtek RTL2838UHIDIR SN 00..1.
Also tryed Device "Other".

Device String, RTL=0 and input rate 1800000. I have recption only from 24MHz up. The program does not allow lower frequencyes.

I also tryed "rtl=0,direct_samp=2", but results were the same.

Thank you

Luis
CU2IJ

Re: Please Help. GQRX and SDR-RTL V3 for HF reception

Posted: Thu Jan 17, 2019 12:08 am
by rtlsdrblog
Can you try "rtl=0,direct_samp=3" ?

It depends on what drivers you have installed. Some of them use "3" for some reason.

Also make sure that "No limits" in GQRX is checked.

Re: Please Help. GQRX and SDR-RTL V3 for HF reception

Posted: Thu Jan 17, 2019 3:17 am
by RCND
Hello:

Have you run the volk_profile in the terminal? This optimizes the Gqrx software.

For HF use, other, and then the rtl=0,direct_samp=2 or the rtl=0,direct_samp=3 string.

Should work then.

Re: Please Help. GQRX and SDR-RTL V3 for HF reception

Posted: Thu Jan 17, 2019 9:40 pm
by cu2ij
Thank you both,
rtl=0,direct_samp=3 has done the trick.
Best regards

Luis