[Discuss-gnuradio] Re: N210 8-bit mode and WBX bandwidth
Woops, sorry for the resend. Just checked the archives and realised the listserv didn't reflect my own message back to me. On Sat, Dec 4, 2010 at 2:22 PM, Blair Strang wrote: > Hi all, > > Two related questions: > > 1) In the datasheet for the N210, the specifications state 50Mhz > instantaneous bandwidth in 8-bit mode. I was looking at > otw_type.width in the UHD and I can't see an 8 bit mode there. Is > 8-bit mode implemented in the fpga/firmware/driver for N210? If not, > roughly how far ahead in the roadmap would it be? I apologise if > this is a FAQ. > > 2) The WBX has a fixed filter; I can see in the UHD an indication it's > fixed at 40Mhz. Would it be hard to modify the daughterboard to > provide 50Mhz of bandwidth? > > Thanks and regards, > > Blair. > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] N210 8-bit mode and WBX bandwidth
Hi all, Two related questions: 1) In the datasheet for the N210, the specifications state 50Mhz instantaneous bandwidth in 8-bit mode. I was looking at otw_type.width in the UHD and I can't see an 8 bit mode there. Is 8-bit mode implemented in the fpga/firmware/driver for N210? If not, roughly how far ahead in the roadmap would it be? I apologise if this is a FAQ. 2) The WBX has a fixed filter; I can see in the UHD an indication it's fixed at 40Mhz. Would it be hard to modify the daughterboard to provide 50Mhz of bandwidth? Thanks and regards, Blair. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] N210 8-bit mode and WBX bandwidth
Hi all, Two related questions: 1) In the datasheet for the N210, the specifications state 50Mhz instantaneous bandwidth in 8-bit mode. I was looking at otw_type.width in the UHD and I can't see an 8 bit mode there. Is 8-bit mode implemented in the fpga/firmware/driver for N210? If not, roughly how far ahead in the roadmap would it be? I apologise if this is a FAQ. 2) The WBX has a fixed filter; I can see in the UHD an indication it's fixed at 40Mhz. Would it be hard to modify the daughterboard to provide 50Mhz of bandwidth? Thanks and regards, Blair. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] testing outside building with our USRPs
On Mon, Dec 1, 2008 at 4:20 PM, Bill Stevenson <[EMAIL PROTECTED]> wrote: > Hello, all! ... > But how can we get power for USRPs when we are testing outside? Could > anybody tell me a decent way to power USRPs up without connecting the power > cable to the extension board inside the building? What kind of batterypack > can we use for the USRPs if battery is doable? Thanks a lot! a) Use sealed 6v batteries. Get a charger when you buy the batteries. Check the mAh rating to make sure you'll get the runtime you need. Try to avoid using them in parallel unless you have to. b) Use car batteries plus inverters (or even cars, inverters and a couple long extension cables). Heavy, expensive, inefficient, but you might have the kit already. Regards, Blair. ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Basic TX RX antennas
Hi, I just received my USRP today (thanks Ettus!) and am in a similar position, wanting to smoke test by FM demod. I probably have more or less the same antenna as you. I cut in half a 1M SMA pigtail I had lying around and soldered 2M of wire out of an Ethernet cable to the centre conductor. It receives strong FM stations just fine. I know this antenna is at least some use because when I unplug it I can't hear FM stations anymore. Mine is duct-taped to the ceiling. First, just to be sure: are you sure your volume is turned up? ;) I used alsamixer and turned master and PCM right up, then turned up volume in the app. If the station is just quiet (no hiss/crackle/noise) then this might be your problem. Or perhaps your speakers are wimpy and you need headphones. Second, what can you see in usrp_fft.py (or the wfm app) for the station you're trying to recieve? With the basicrx I see a fairly obvious peak about 25db above noise when tuned to a strong local FM station. I would also recommend you try the TVRX daughterboard if you have one. I am obviously new to g-r, and would love to hear what external RF hardware (antennas? preamps? external radios with IF outputs?) others are using, regardless of application. I have been lurking in the list for a while and searched the archives a bit, but there does not seem to be much discussion of the subject. > Secondly, is connecting wire as antenna safe? > Are there any safety precautions to be taken e.g. using anti static straps? I think you can get away with it, with a few caveats. Don't short anything, get struck by lightning, stick it in a microwave oven, trip over it, etc. I have been swapping the antenna around with the USRP powered on. Having now thought about it, I probably shouldn't be so cavalier. Regards, Blair. On Sun, Nov 23, 2008 at 12:37 AM, ali siddiqi <[EMAIL PROTECTED]> wrote: > Hi, > > I have got Basic RX and Basic TX daughterboards. But i have no antennas for > them as they are not provided with these daughterboards by the ettus corp. > No reference at ettus.com's sales page either. > While running usrp_wfm_rcv.py, i hear a very faint voice of the fm channel > when using a 1 foot piece of copper wire. > How can I get clear signals? Are there any antennas for these > daughterboards? > > > Secondly, is connecting wire as antenna safe? > Are there any safety precautions to be taken e.g. using anti static straps? > > Thanks > > ___ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
