The PLL not locked error is just because you've (or someone) has asked for a frequency tuning on the device that isn't possible, so the hardware is saying "can't do that".
The GCD messsage is a warning. Given the message you should just have used an interpolation of 1 and a decimation of 2.
Others can comment on the overall-sanity of your flowgraph.
On 2015-09-17 14:43, Pedro Gabriel Adami wrote:
Hello,
I'm trying to run the flowgraph available on the website of John Petrich ( http://www.w7fu.com/index_files/Page774.htm). I'm using the RTL-SDR 2832U and I have already made the configurations to blacklist and fix the bugs of Ubuntu 14.04 LTS.
But when I run the flowgraphs, these messages appear and I can't hear the FM station I choose. Generating: "/home/aluno/Downloads/RTL_WBFM_RX_QT_GUI_08262015.py"
Executing: "/home/aluno/Downloads/RTL_WBFM_RX_QT_GUI_08262015.py"
linux; GNU C++ version 4.8.4; Boost_105400; UHD_003.010.git-27-g28fa5a12
gr-osmosdr v0.1.4-48-g86ad5842 (0.1.5git) gnuradio 3.7.8 built-in source types: file fcd rtl rtl_tcp uhd hackrf bladerf rfspace airspy Using device #0 Realtek RTL2838UHIDIR SN: 00000001 Found Rafael Micro R820T tuner [R82XX] PLL not locked! [R82XX] PLL not locked! INFO: Rational resampler has user-provided taps but interpolation (512) and decimation (1024) have a GCD of 512, which increases the complexity of the filterbank. Consider reducing these values by the GCD. Using Volk machine: sse4_1_64_orc INFO: Audio sink arch: alsa aU
I'm not sure but I think that this "PLL not locked" and the INFO about Rational Resampler might be the problem. Can anyone help me, please?
PS: I'm attaching the two flowgraphs from his website.
Thanks a lot.
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