Right, but I think the idea here is for $20 why not? As far as a driver goes what they have now is a program that starts the thing and tunes it, then reads samples, all of this is already build into the UHD framework. I'm not sure but I would like to make this a UHD compatible USB device. ( Much like the USRP1 )
~Andrew On Thu, Mar 22, 2012 at 11:06 AM, <mle...@ripnet.com> wrote: > I also have a trio on order. The issues I can see surrounding this approach > are: > > o Consumer electronics parts lineups are capricious and unreliable--the > target device may use the "SDR-capable chip" this month, and next month, > they've found that they can shave $0.35 of off the B.O.M. by going with a > totally different parts line-up they will, even though it will cost them > $50K in engineering costs up front--they sell thousands and thousands a > month. There are already *TWO* versions of this dongle, one using the > "good" RTL2832U chip, and the other using an Afatech chip (AF9015 or > AF9035). The "magic sauce" that Antti discovered in the RTL2832U chip to do > "raw samples" is peculiar to the RTL2832U chip, and doesn't necessarily map > on to other DVB-T digital demod chips on the market. > > > > o The 28.8MHz master oscillator is a very cheap 100PPM part, which will > produce unpleasant frequency offsets, and phase-noise to match > > > > o Not sure how good the noise figure is, since there's no LNA in front of > the E4000 tuner chip. > > > > o Don't know how they implement re-sampling. If it's not done right, then > there'll be nasty aliases in the passband handed to the host > > > > None of these are fatal, but be aware that the approach of "re-purposing" > consumer electronics is fraught with dangers as described above. > > > > -Marcus > > > > On Thu, 22 Mar 2012 10:53:13 -0400, Tom Rondeau wrote: > > Andrew and Sean, > > Glad to hear you both thinking about doing this! Coordinate as you can > and keep us up to date on the progress. > > Tom > > > On Thu, Mar 22, 2012 at 10:45 AM, Nowlan, Sean > <sean.now...@gtri.gatech.edu> wrote: > > Funny enough, a coworker mentioned it to me yesterday morning and then it > popped up on discuss-gnuradio. He must have seen it on Reddit as well. > > I have one on order too, and I was also contemplating a GNUradio driver... > let me know if you want to coordinate. > > Sean > > -----Original Message----- > From: discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org > [mailto:discuss-gnuradio-bounces+sean.nowlan=gtri.gatech....@gnu.org] On > Behalf Of Andrew Davis > Sent: Wednesday, March 21, 2012 9:34 PM > To: David Kierzkowski; discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] This is nice > > Saw it on Reddit a couple days ago, already have one on order. Then I might > work on making a GnuRadio driver or something for real-time use. > > On Wed, Mar 21, 2012 at 3:17 AM, David Kierzkowski <dave_k_...@yahoo.com> > wrote: > > The osmocom guys are using a 20$ USB catv tuner as a RF source in gnuradio. > 3.2MS/s ! > > http://sdr.osmocom.org/trac/wiki/rtl-sdr > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio > _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
