Re: [Discuss-gnuradio] RTL SDR & GNU Radio new linux machine.

[Paul Zander]

FM received!

I re-tried GRC with OSMO_FM, which I downloaded last month.

I touched the antenna, and heard a faint voice.  I repositioned the dongle and reception was much improved. 

Apparently the very first time I tried the radio, the antenna was in just the right place.  By the time I installed Linux, etc. something changed.

I still have a ton of questions about installation of GR and especially the Osmocom SDR, but at last I know things are actually working. 

---

From: Cinaed Simson <address@hidden>
To: Paul Zander <address@hidden>; "address@hidden" <address@hidden>
Sent: Monday, October 24, 2016 12:29 PM
Subject: Re: [Discuss-gnuradio] RTL SDR & GNU Radio new linux machine.

On 10/24/2016 09:40 AM, Paul Zander wrote:
> I too am lost in an obstacle course in getting RTL_SDR to work.
> Background:
> 1.  The hardware worked with windows and SDR#.    Audio in the speakers
> on the first try.
> 2.  I first tried the GNURadio v3.7.10.1 as a live .iso.  PLL not locked
> 3.  Then I installed Debian Stretch and downloaded the packages.
>     
> I have also installed /etc/modprobe.d/rtl_blacklist.conf and
> /etc/udev/rules.d/rtl-sdr.rules.
>
> === GRC 3.7.10 ===
>
> Executing: /usr/bin/python -u /DATA/GNUradio/myProjects/RTL/top_block.py
>
> linux; GNU C++ version 6.2.0 20160822; Boost_106100;
> UHD_003.009.005-0-unknown
>
> gr-osmosdr 0.1.4 (0.1.4) gnuradio 3.7.10
> built-in source types: file osmosdr fcd rtl rtl_tcp uhd miri hackrf
> bladerf rfspace airspy soapy redpitaya
> Cannot connect to server socket err = No such file or directory
> Cannot connect to server request channel
> jack server is not running or cannot be started
> JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for
> 4294967295, skipping unlock
> JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for
> 4294967295, skipping unlock
> Found Rafael Micro R820T tuner
> Using device #0 Realtek RTL2838UHIDIR SN: 00000001
> Found Rafael Micro R820T tuner
> [R82XX] PLL not locked!
> Exact sample rate is: 2000000.052982 Hz
> [R82XX] PLL not locked!
> gr::log :INFO: audio source - Audio sink arch: alsa
> aUaUaUaUaUaUaUaUaUaUaUaUaUaUaU


This typically means the receiver is receiving to much noise to lock on
to the signal.

Try tuning to a different frequency.

May be an antenna problem or maybe the device and/or the antenna are to
close to your computer.