This is a simple question with a long prelude. We have a handful of N210/WBX that work great with UHD with which we are familiar. Until last night, I had not spent more than ten minutes with GNU Radio. This morning I installed a fresh Fedora-16 guest VM running on VMware Workstation on a strong Win7-64b host. I used build-gnuradio to install GNU Radio 3.6.0 . And in twenty minutes with no issues whatsoever, I’m feeding our RF signal generator into a USRP2 and making sane GUI comparisons to our spectrum analyzer. Brilliant!
[shep@fedoraVM1 ~]$ uhd_fft -a addr=10.0.209.194 -f 935M -s 2M linux; GNU C++ version 4.6.3 20120306 (Red Hat 4.6.3-2); Boost_104700; UHD_003.004.002-133-gb61a1103 -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes Using Volk machine: avx_64 I then experimented with the uhd_rx_nogui program and found that the audio is discontinuous (though almost intelligible), as is shown by the stream of audio underflow indications that feed to stdout: [shep@fedoraVM1 ~]$ uhd_rx_nogui -a addr=10.0.209.194 -f 99.5M -m FM linux; GNU C++ version 4.6.3 20120306 (Red Hat 4.6.3-2); Boost_104700; UHD_003.004.002-133-gb61a1103 -- Opening a USRP2/N-Series device... -- Current recv frame size: 1472 bytes -- Current send frame size: 1472 bytes UHD Warning: The hardware does not support the requested RX sample rate: Target sample rate: 0.256000 MSps Actual sample rate: 0.255102 MSps >>> gr_fir_ccf: using SSE Using gain: 19.0 >>> gr_fir_ccc: using SSE >>> gr_fir_fff: using SSE aUaUaUaUaUaUaUaUaU … aUaUaUaUaUOaU I’m uncertain if this is my clueless-ness of audio with the Fedora VM under VMWare; or something more GNU Radio related. Audio seems work fine in the VM. And GNU Radio seems to work fine (no errors, good data) writing files with uhd_rx_cfile. Is this issue likely a VM audio device issue? Am I “off in the weeds” running GNU Radio audio on a VM? This isn’t my day job; but any guidance on bisecting this issue is appreciated. -Shep _______________________________________________ Discuss-gnuradio mailing list [email protected] https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
