Date: Sun, 20 Jan 2013 19:21:04 +0100 From: Torfinn Ingolfsen <torfinn.ingolfsen@getmail.no> To: freebsd-multimedia@FreeBSD.org Subject: Re: rtl-sdr port (was: New driver opportunity - rtl2832u) Message-ID: <20130120192104.87a818529a6e3fdda8c15b61@getmail.no> In-Reply-To: <20120824120445.M89236@martymac.org> References: <20120824120445.M89236@martymac.org>
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Hello, I see that rtl-sdr is in the ports tree now. :-) Yesterday I got a Newsky TV28T[1] stick. Now I wonder what the best way to test it would be? I've done this: tingo@kg-v2$ uname -a FreeBSD kg-v2.kg4.no 8.3-STABLE FreeBSD 8.3-STABLE #6: Fri Apr 27 23:50:55 CEST 2012 root@kg-v2.kg4.no:/usr/obj/usr/src/sys/GENERIC amd64 root@kg-v2# usbconfig -u 1 -a 3 ugen1.3: <RTL2838UHIDIR Realtek> at usbus1, cfg=0 md=HOST spd=HIGH (480Mbps) pwr=ON root@kg-v2# rtl_test -t Found 1 device(s): 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Found Rafael Micro R820T tuner Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 No E4000 tuner found, aborting. (undertandable) How high a samplerate should this be able to do? I'm still losing samples here: root@kg-v2# rtl_test -s 1.3e6 Found 1 device(s): 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Using device 0: ezcap USB 2.0 DVB-T/DAB/FM dongle Found Rafael Micro R820T tuner Supported gain values (29): 0.0 0.9 1.4 2.7 3.7 7.7 8.7 12.5 14.4 15.7 16.6 19.7 20.7 22.9 25.4 28.0 29.7 32.8 33.8 36.4 37.2 38.6 40.2 42.1 43.4 43.9 44.5 48.0 49.6 Exact sample rate is: 1300000.021524 Hz Reading samples in async mode... lost at least 188 bytes lost at least 16 bytes lost at least 112 bytes ^CSignal caught, exiting! User cancel, exiting... What would be the best way to test rtl_fm? sox? References: 1) http://www.nooelec.com/store/software-defined-radio/sdr-receivers/tv28tv2.html -- Torfinn Ingolfsen <torfinn.ingolfsen@getmail.no>
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