Re: [Discuss-gnuradio] Re: get fatal IO error 11 when running usrp2_fft.py (USRP2 + XCVR2450)

Hi Marcus D. Leech, Thank you for your response. I never use the peak hold button on this machine because I cannot click any buttons on the screen begin the program running, it is also dead as the same time. As I said before, I cannot do nothing only force quit :( I really want to know how t

[Discuss-gnuradio] Switching of UHD/Raw-Ethernet Driver

I have two small questions... 1. I successfully installed UHD (gr-uhd) following the guide " http://www.ettus.com/uhd_docs/manual/html/usrp2.html"; But now, I want to be able to switch back and forth between the UHD and Raw-Ethernet Driver. Do I need to uninstall the UHD, or just using (burni

Re: [Discuss-gnuradio] adjustable clock oscillator?

On 11/17/2010 09:13 PM, Justin Kelly wrote: Just a thought would something like the Silicon Labs Si 570 anyrate clock be of use for adjusting any of the system speeds? Like nudging the sampling rate up or down to better match what your working with? Justin N2TOH If your concern is moving the

[Discuss-gnuradio] adjustable clock oscillator?

Just a thought would something like the Silicon Labs Si 570 anyrate clock be of use for adjusting any of the system speeds? Like nudging the sampling rate up or down to better match what your working with? Justin N2TOH ___ Discuss-gnuradio mailing list

RE: [Discuss-gnuradio] question about import a new block in gnuradio-3.3.0

From: tianxia...@hotmail.com To: e...@comsec.com Subject: RE: [Discuss-gnuradio] question about import a new block in gnuradio-3.3.0 Date: Thu, 18 Nov 2010 11:38:43 +0800 hi Eric: I just imput the command in the terminal as you said in the last E-mail.After that,when I input the comm

Re: [Discuss-gnuradio] part number for USRP1 64MHz clock

On 11/17/2010 01:28 PM, Tom Ryan wrote: I need to replace the 64MHz clock on my usrp1 motherboard. Does anyone have the part number. I can not seem to match the part using the markings on the chip? Thanks Tom CB3LV-3C-64M ___ Discuss-gnuradio ma

[Discuss-gnuradio] part number for USRP1 64MHz clock

I need to replace the 64MHz clock on my usrp1 motherboard. Does anyone have the part number. I can not seem to match the part using the markings on the chip? Thanks Tom ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.or

Re: [Discuss-gnuradio] Help - Custom block generating data @ 1:5115 input to output ratio causes flowgraph to hang -- how to prevent this

On Wed, Nov 17, 2010 at 09:14:47AM -0800, John Andrews wrote: > Hi, > I am posting this question again with better explanation as I got no help > yet. > > I have a custom C++ block that I use in the modified dbpsk.py modulation > scheme. This block basically spreads each input data bit by 1023. >

Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2

On 11/17/2010 03:05 PM, Steven Clark wrote: > > On Wed, Nov 17, 2010 at 2:45 PM, Marcus D. Leech > wrote: > > On 11/17/2010 12:43 PM, Marcus D. Leech wrote: > > > > What I'm seeing is that the magnitudes (as seen in the number > sink) coming off the so

Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2

On Wed, Nov 17, 2010 at 2:45 PM, Marcus D. Leech wrote: > On 11/17/2010 12:43 PM, Marcus D. Leech wrote: > >> >> >> What I'm seeing is that the magnitudes (as seen in the number sink) coming >> off the source, even with roughly 75dB of gain ahead >> are roughly 0.002 to 0.003 when I'm using 400

Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2

On 11/17/2010 12:43 PM, Marcus D. Leech wrote: What I'm seeing is that the magnitudes (as seen in the number sink) coming off the source, even with roughly 75dB of gain ahead are roughly 0.002 to 0.003 when I'm using 400KHz sampling, and roughly 0.0006 to 0.0007 when the bandwidth is 250KH

Re: [Discuss-gnuradio] least processor intensive modulation scheme

On 11/17/2010 12:26 PM, William Cox wrote: I guess it'd be nice if there was a way to compare spectral efficiency vs. processing power. In terms of complex modulation schemes, which would be least intensive? QAM, QPSK, GMSK? Consult a modern signal processing book. I ask because I'm trying to

Re: [Discuss-gnuradio] Square XY plots

That did the trick thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] Problem in designing Coded OFDM Rxr (using, trellis-viterbi )

Venkat, I assume you are working with a (2,1) trellis code, ie, 1 bit in two bits out. I also assume that you unpack each input byte to 8 single bits (carried in a byte) before trellis encoding and you pack every 4 2-bit worth bytes into a single byte after trellis encoding. This means that for

Re: [Discuss-gnuradio] Square XY plots

That did the trick thanks! ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] bandwidths< 400Khz no longer work with USRP2

On 11/17/2010 02:20 AM, Matt Ettus wrote: Decimation is filtering. When you decimate by 512 you are reducing noise by a factor of 512 (27dB). Since you are using a BasicRX, there will be very little noise, and 27dB less after decimation. In fact, there is so little noise that the output of

Re: [Discuss-gnuradio] Help - Custom block generating data @ 1:5115 input to output ratio causes flowgraph to hang -- how to prevent this

On Wed, Nov 17, 2010 at 9:14 AM, John Andrews wrote: > Hi, > I am posting this question again with better explanation as I got no help > yet. > > I have a custom C++ block that I use in the modified dbpsk.py modulation > scheme. This block basically spreads each input data bit by 1023. > > The flo

Re: [Discuss-gnuradio] Using UHD failed to find USRP2

On Wed, Nov 17, 2010 at 8:37 AM, Josh Blum wrote: > I long run plan is to replace benchmark* and tunnel apps with UHD and > message passing blocks. For now, if you want to go about modding the > examples to work with UHD, look for generic_usrp.py and usrp_options.py. You > can wedge a uhd source a

Re: [Discuss-gnuradio] any recommended PCIe Ethernet NICs?

On 11/17/2010 11:37 AM, Matt Ettus wrote: Intel cards are the gold standard. Marvell and Broadcom are good as well. I never trust anything from Realtek. I've heard that before "don't trust RealTek", but my experience with *Rx-only* is that it supports full bandwidth just fine. I have a c

Re: [Discuss-gnuradio] least processor intensive modulation scheme

I guess it'd be nice if there was a way to compare spectral efficiency vs. processing power. In terms of complex modulation schemes, which would be least intensive? QAM, QPSK, GMSK? I ask because I'm trying to use an Atom-based system for running GNURadio and I'd like to minimize the overhead as m

[Discuss-gnuradio] Help - Custom block generating data @ 1:5115 input to output ratio causes flowgraph to hang -- how to prevent this

Hi, I am posting this question again with better explanation as I got no help yet. I have a custom C++ block that I use in the modified dbpsk.py modulation scheme. This block basically spreads each input data bit by 1023. The flowgraph connect looks like this self.connect(self,self.bytes2chunks,s

Re: [Discuss-gnuradio] USRP2+WBX - How to use precisely an 8 MHz band?

Matt, I was trying to explain that using 8 as a decimation rate would complicate my rational resampler coefficients, not that it would give me less band. Anyway resampling seems too heavy for my processor and I decided to use filtering as you suggested. The problem is that I don't understand what

Re: [Discuss-gnuradio] Using UHD failed to find USRP2

I long run plan is to replace benchmark* and tunnel apps with UHD and message passing blocks. For now, if you want to go about modding the examples to work with UHD, look for generic_usrp.py and usrp_options.py. You can wedge a uhd source and sink block in there in parallel with the usrp1 and 2

Re: [Discuss-gnuradio] any recommended PCIe Ethernet NICs?

On 11/17/2010 01:03 AM, Steve Mcmahon wrote: Hello: What Ethernet cards do people use/recommend for use with the USRP2? I'm using an Intel PRO/1000 GT 1Gbps PCI NIC, and it seems to work fine and has always been reliable. Is anyone else using this NIC? I'm not sure if my NIC is the best choice,

Re: [Discuss-gnuradio] least processor intensive modulation scheme

On 11/17/2010 09:52 AM, William Cox wrote: > Do the processor usage for the various mod/demod schemes change that > much? Which scheme is the least processor intensive? > Thanks! > -William > > Wildly and vastly! Consider AM, for example (or OOK in the data world) it's just a multiply operation

Re: [Discuss-gnuradio] question about import a new block in gnuradio-3.3.0

On Wed, Nov 17, 2010 at 06:28:32PM +0800, intermilan wrote: > > Hi Eric: >thanks for your help. I figured the question out. What was the problem and the fix? It's nice to have it here on the list so that others can find it with their favorite search engine. Eric > > Date: Tue, 16 Nov

Re: [Discuss-gnuradio] Using UHD failed to find USRP2

I have the same question. What is the easiest way to modify benchmark_*.py to make them work with UHD? Tuan On Mon, Nov 15, 2010 at 1:12 PM, Andrew Ge wrote: > Nick, thanks for pointing this out. Do you know whether there is some plan > to update benchmark_tx/rx.py for UHD? > > Andrew > > > On

Re: [Discuss-gnuradio] Square XY plots

Hi Justin, if you do mean the graphical sinks of GRC, try the "Window size" option. Putting something like 512,512 in it should give you a square. Fabian On Wed, Nov 17, 2010 at 3:25 PM, Justin Bracken wrote: > Hello All, > > Is there a way to make the xy scope plots square? Thatis make the s

[Discuss-gnuradio] least processor intensive modulation scheme

Do the processor usage for the various mod/demod schemes change that much? Which scheme is the least processor intensive? Thanks! -William ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio

Re: [Discuss-gnuradio] USRP problems (interpolation, decimation, sampling rate, frequency)

Thank you, it works. (I have done what you told me to, but at that time it didn't work. MYSTERIOUS) Anyway I've got a new problem RX seems similar with TX, but it... JITTERS in an amplitude or a frequency In other words, RX keeps a shape of TX, loosely. Observing for a fine duration, however

[Discuss-gnuradio] Square XY plots

Hello All, Is there a way to make the xy scope plots square? Thatis make the spacing of the x and y axis equal for a given value. Right now it looks like the aspect ratio is 1.568:1. How would one make it 1:1? Thanks, Justin ___ Discuss-gnuradio mailing

Re: [Discuss-gnuradio] USRP problems (interpolation, decimation, sampling rate, frequency)

On Wed, Nov 17, 2010 at 3:41 AM, Songsong Gee wrote: > I use two USRPs. One sends a sinusoidal signal, and the other receives it. > > A flow graph and a result are here > flow graph: > http://lh5.ggpht.com/_byQV8nmc5FA/TOOTX9ReSYI/AQk/hWJ9Kf5GcAA/s800/%EC%8A%A4%ED%81%AC%EB%A6%B0%EC%83%B7-1

Re: [Discuss-gnuradio] Gnuradio package description

On Nov 17, 2010, at 3:01 PM, Thunder87 wrote: > > This leaves: > gcell ... i'll take a wild guess that it's not > gr-gcell ... and again - no idea Its probably the code that runs on the IBM Cell BroadBand Processor, commonly found on the Playstation 3. The older PS3 models could run linux on it

Re: [Discuss-gnuradio] Gnuradio package description

On Wed, Nov 17, 2010 at 03:01:27AM -0800, Thunder87 wrote: > Just wanted to throw out unnecessary stuff. There's no need to get angry. > > gr-gpio > gr-trellis ... something about coding > gr-utils > gcell > gr-gcell Then keep gr-utils and gr-trellis, throw out the rest. And, seriously, look *ins

RE: [Discuss-gnuradio] UHD IP Address Setting Issue

Hi Veljko, Thanks for replying! I think the source of the problem might be a bug though: In uhd/host/lib/usrp/mboard_eeprom.cpp, USRP_NXXX_OFFSETS maps "ip-addr" to the I2C address 0x08 In uhd/firmware/microblaze/lib/eth_addrs.c , USRP_EE_MBOARD_IP_ADDR (the I2C address for the ip address) is s

Re: [Discuss-gnuradio] Gnuradio package description

Martin Braun-4 wrote: > > > On Tue, Nov 16, 2010 at 11:35:47PM -0800, Thunder87 wrote: > although I'm always glad to see people interested in GNU Radio, I think > you should spend at least one minute figuring out answers for yourself. > See: > http://gnuradio.org/redmine/wiki/gnuradio/Reporting

RE: [Discuss-gnuradio] question about import a new block in gnuradio-3.3.0

Hi Eric: thanks for your help. I figured the question out. > Date: Tue, 16 Nov 2010 21:46:13 -0800 > From: e...@comsec.com > To: tianxia...@hotmail.com > CC: discuss-gnuradio@gnu.org > Subject: Re: [Discuss-gnuradio] question about import a new block in > gnuradio-3.3.0 > > On Wed, Nov 1

[Discuss-gnuradio] any recommended PCIe Ethernet NICs?

Hello: What Ethernet cards do people use/recommend for use with the USRP2? I'm using an Intel PRO/1000 GT 1Gbps PCI NIC, and it seems to work fine and has always been reliable. Is anyone else using this NIC? I'm not sure if my NIC is the best choice, or if I would benefit from using a PCI Expr

[Discuss-gnuradio] USRP problems (interpolation, decimation, sampling rate, frequency)

I use two USRPs. One sends a sinusoidal signal, and the other receives it. A flow graph and a result are here flow graph: http://lh5.ggpht.com/_byQV8nmc5FA/TOOTX9ReSYI/AQk/hWJ9Kf5GcAA/s800/%EC%8A%A4%ED%81%AC%EB%A6%B0%EC%83%B7-1.png result: http://lh5.ggpht.com/_byQV8nmc5FA/TOOTYGnBCUI/

Re: [Discuss-gnuradio] Gnuradio package description

On Tue, Nov 16, 2010 at 11:35:47PM -0800, Thunder87 wrote: > Hi! Could anyone please describe what are these packages for: > > gr-gpio > gr-trellis > gr-utils > gcell > gr-gcell > gr-msdd6000 > gr-atsc > gr-comedi > gr-noaa Hi Thunder87, although I'm always glad to see people interested in GNU R

Re: [Discuss-gnuradio] Multi-port NIC for laptop

On Wed, 2010-11-17 at 06:14 +0900, YouheiFujii wrote: > (2010/11/17 0:24), Per Zetterberg wrote: > > On Tue, 2010-11-16 at 21:12 +0900, YouheiFujii wrote: > >> Hi all, > >> > >> Now I use laptop PC (Dell Studio 1737 ) with USRP2. > >> > >> I want to connect 2 or more USRP2s to that laptop PC. > >>