[Discuss-gnuradio] Changing four parallel pipes of ADC's into two parallel pipes of ADC's(having interleaved IQ as in the case of DAC's)

2010-08-24 Thread Sanjay Singh
Hello Eric, In USRP1, I don't want AD9862 to use in my application for many reasons. Am looking for changing four parallel pipes of ADC's into two parallel pipes of ADC's(having interleaved IQ as in the case of DAC's). I need only changes required to be done in FPGA. Although i know that the ADC

Re: [Discuss-gnuradio] USRP2+WBX full duplex doesn't receive

2010-08-24 Thread George Nychis
On Tue, Aug 24, 2010 at 7:11 AM, Marc Epard wrote: > On Aug 23, 2010, at 10:10 PM, George Nychis wrote: > > > If you stop transmitting, does your RX sample stream then begin again? > > Alas, no. Once it stops receiving, it never starts again. Time to dig into > the firmware. > > I don't think I'v

Re: [Discuss-gnuradio] USRP/gnuradio Issues in OS X

2010-08-24 Thread Mark J. Blair
On Aug 24, 2010, at 4:58 PM, Michael Dickens wrote: > Hi Mark - I'm glad you got it working; if you installed all of the background > dependencies with MacPorts, compiling GNU Radio should be as simple as: > > [fix bootstrap] > ./bootstrap > ./configure Should be... but isn't. > with no other

Re: [Discuss-gnuradio] USRP/gnuradio Issues in OS X

2010-08-24 Thread Michael Dickens
Hi Mark - I'm glad you got it working; if you installed all of the background dependencies with MacPorts, compiling GNU Radio should be as simple as: [fix bootstrap] ./bootstrap ./configure make make check sudo make install with no other options. IIRC, the 3 primary environment variables yo

Re: [Discuss-gnuradio] Large FFTs

2010-08-24 Thread Thomas Hobiger
Hi, Your reply is related to running the FFT on the CPU, right? Do you have any experience running it on the FPGA of the USRP1 or USRP2? No, but I know that radio astronomers do this. I have done FFT with CUDA. As long as you can keep the data inside the GPU for long enough, you can get

Re: [Discuss-gnuradio] USRP/gnuradio Issues in OS X

2010-08-24 Thread Thomas Tsou
On Tue, Aug 24, 2010 at 4:18 PM, Mark J. Blair wrote: > > Now usrper appears to be happy: > > ~/gnuradio% usrper -v load_standard_bits > usrper: found unconfigured usrp; needs firmware. > ~/gnuradio% usrper -v get_hash0 > hash: ???7???g8!?_Md > ~/gnuradio% usrper -v set_hash0 deadbeef > ~/gnuradio

Re: [Discuss-gnuradio] USRP/gnuradio Issues in OS X

2010-08-24 Thread Mark J. Blair
So far, the only way I've been able to get gnuradio to link against libusb-legacy has been to uninstall libusb-1.0. Even when I overrode pkg-config by setting the USB_* variables, it'd still (apparently) link against libusb-1.0 and then crash at runtime when it couldn't find the "_usb_debug" sym

Re: [Discuss-gnuradio] Peak detector block does not really work. It need to be fixed

2010-08-24 Thread Eric Blossom
On Tue, Aug 24, 2010 at 01:49:09PM -0700, Phong Do wrote: > > Hello Tom, > > Can you explain me why should gr_peak_detector need negative inputs ? If you use grep, you can find places in the code where it is used, and then answer your own question. > What about the variable "look ahead" ? I wro

Re: [Discuss-gnuradio] Peak detector block does not really work. It need to be fixed

2010-08-24 Thread Phong Do
Hello Tom, Can you explain me why should gr_peak_detector need negative inputs ? What about the variable "look ahead" ? I wrote in the last message that "look ahead" has no function in gr_peak_detector. Do you know how can I add this feature in peak detector ? Thanks in advance Phong Do On Th

Re: [Discuss-gnuradio] USRP Power Supply Noise

2010-08-24 Thread John Orlando
On Tue, Aug 24, 2010 at 9:32 AM, Jeffrey Lambert wrote: > Hello, > I am attempting to build an analog front-end to a USRP 1 device.  I have > selected a VCO that will suit the frequency range we are looking at: It is > an RFVC1800 and has a tuning range of approximately 7.4 - 12.4 GHz over a 13 >

[Discuss-gnuradio] USRP Power Supply Noise

2010-08-24 Thread Jeffrey Lambert
Hello, I am attempting to build an analog front-end to a USRP 1 device. I have selected a VCO that will suit the frequency range we are looking at: It is an RFVC1800 and has a tuning range of approximately 7.4 - 12.4 GHz over a 13 volt tuning voltage. As this VCO is very sensitive to externa

Re: [Discuss-gnuradio] USRP2+WBX full duplex doesn't receive

2010-08-24 Thread Marc Epard
On Aug 23, 2010, at 10:10 PM, George Nychis wrote: > If you stop transmitting, does your RX sample stream then begin again? Alas, no. Once it stops receiving, it never starts again. Time to dig into the firmware. -Marc ___ Discuss-gnuradio mailin

Re: [Discuss-gnuradio] Large FFTs

2010-08-24 Thread Juha Vierinen
> Your reply is related to running the FFT on the CPU, right? Do you have any > experience running it on the FPGA of the USRP1 or USRP2? No, but I know that radio astronomers do this. I have done FFT with CUDA. As long as you can keep the data inside the GPU for long enough, you can get pretty ni

Re: [Discuss-gnuradio] Large FFTs

2010-08-24 Thread Patrik Tast
Thomas, I'm some affraid to "fry" the DBSRX, draw too much current for the amplifier, so I use a "general" power inserter instead of feeding the Antenna bias pin on the daughterboard. I use a cheap Johansson (BE) TV power inserter (VHF - L-Band) so I wont ever have to worry about damaging the

Re: [Discuss-gnuradio] Large FFTs

2010-08-24 Thread Patrik Tast
Thanks Thomas, We'll try to replicate the antenna using a USRP1 within a few weeks Patrik - Original Message - From: "Thomas Hobiger" To: "Patrik Tast" Cc: ; "Jerry" Sent: Tuesday, August 24, 2010 10:13 Subject: Re: [Discuss-gnuradio] Large FFTs Hi, What antenna are you using

Re: [Discuss-gnuradio] Large FFTs

2010-08-24 Thread Thomas Hobiger
Hi, What antenna are you using for GPS? If possible, can you give us a link or specifications of it. Beside some geodetic high end antenna (Trimble), we'd like to test the 3G1215A-XS-1 http://webserv.novatel.ca:7005/Antcom/partDetails.do?partid=53&lineparam=5 for some GNSS-R stuff. As th