On Sun, Apr 28, 2013 at 4:27 AM, Stuart Henderson <s...@spacehopper.org>wrote:
> On 2013-04-27, Christian Weisgerber <na...@mips.inka.de> wrote: > > $ rtl_fm -W -f 102.8M | aucat -h raw -r32000 -c0:0 -i - > > wav(-|): couldn't get file size > > Found 1 device(s): > > 0: Realtek, RTL2838UHIDIR, SN: 00000001 > > > > Using device 0: Terratec T Stick PLUS > > Found Elonics E4000 tuner > > [...] > > > > Looks, I mean, _sounds_ like it works in principle. > > > > About 2650 ehci(4) interrupts per second. This has to be the most > > roundabout way to listen to FM radio. > > The main reason I got my device is so I can receive a community station > which I can't pick up at home, plan is to put it at my parents' house > and stream it over the net. (The station's own net stream is a pretty > horrible-sounding 64K mp3). Think I'll get another device to play with > though :-) > > > For the ever popular question what device to buy, since the models > > keep changing and the chipsets aren't mentioned anywhere: If you > > are shopping in Germany, the device above is a SAT.1 co-branded > > > > Terratec ran T Stick+ > > > > available right now for ~20 EUR. > > > > I tested this with the RTL2832U+R820T sold by Hossen (in Amazon store, > shipped from Singapore) - there are also various RTL2832U+E9000 devices > e.g. one sold by NooElec in the US. (if you were to buy a random device > from ebay, you'd be more likely to find an R820T tuner; this works fine > with rtl-sdr; if you're also wanting to use it for tv on Linux, you > need an updated kernel module from linuxtv.org). > > So glad to see this. Receiving broadcast FM isn't even the half of it. >From rtlsdr.org: - FM: both narrow band and wideband. The former is used on two way radio systems such as emergency services and private radio networks (like couriers and taxis) and UHF CB and the latter is the usual broadcast FM the likes of which you have in the kitchen and car. Aircraft and boats and ships also use narrow band FM which you can use RTLSDR to listen to. The SDR# software can receive both narrowband and wideband FM and the latter do stereo FM too! - AM: Most AM transmissions are below the bottom frequency of RTLSDR dongles. You will need a translator (I'll deal with translators soon) to get these frequency bands. - Upper/Lower Sideband (USB/LSB). See AM above. - CW: Continuous wave for morse code enthusiasts. - With GNURadio you can receive and demodulate digital modes such as pagers (POCSAG), ADS-B (aircraft positions), AIS (ship positions), AP25 and TETRA (digital trunk radio) and many others. - GPS reception is currently being worked on but should be do-able. - Satellite reception including receiving ham transmissions from the International Space Station are possible to. I have seen some screen shots of someone using RTLSDR and a 2.5m dish to track the carrier signal on deep space robots such as Voyager and the Mars missions. - This post<http://cgit.osmocom.org/cgit/rtl-sdr/commit/src?h=steve-m/direct_sampling>alludes to the tuner chip being disabled and the RTL chip being used to receive transmissions at 30MHz and below. Of course getting samples is one thing, doing something with them is another. Anybody working on a gnuradio port? :-(
