Re: [Discuss-gnuradio] Re: Invalid EEPROM error message with the WBX board

2010-12-07 Thread Marcus D. Leech
Thanks for your reply Marcus I installed the gnuradio 3.3.1 version and the message Warning: Treating daughterboard with invalid EEPROM contents as if it were a Basic Rx. is gone now but when I try to run gnuradio-companion I receive the following message Cannot import gnuradio. Are your

Re: [Discuss-gnuradio] TPB scheduler fills block buffers

2010-12-07 Thread Eric Blossom
On Tue, Dec 07, 2010 at 11:36:19AM +0100, Anton Blad wrote: On Mon, 29 Nov 2010 09:30:11 -0800, Eric Blossom e...@comsec.com wrote: On Mon, Nov 29, 2010 at 08:42:14AM +0100, antonb wrote: Hi, I am writing an application for which I want to keep the latency to a minimum, and this

[Discuss-gnuradio] FSK4 Demodulation on the FPGA

2010-12-07 Thread Kevin Xu
Hey all, Has anyone attempted to implement a C4FM demodulator on the Altera Cyclone in the USRP1? Right now I'm hoping to do this to read P25 encrypted packets on the FPGA instead of on the CPU, and I wanted to know if it was possible. If so, could anyone could point me to any sort of

Re: [Discuss-gnuradio] Effect of samples_per_symbol on benchmark_qt_loopback2.py

2010-12-07 Thread Tom Rondeau
On Tue, Dec 7, 2010 at 12:42 AM, Ben Reynwar b...@reynwar.net wrote: When I run gnuradio/gnuradio-examples/python/digital/benchmark_qt_loopback2.py I get a strange dependence on samples_per_symbol. I would naively have expected that the more samples per symbol the better, however: python

Re: [Discuss-gnuradio] always a spike on the FFT at the center frequency

2010-12-07 Thread Matt Ettus
On 12/05/2010 11:22 PM, adib_sairi wrote: Matt Ettus wrote: This is due to truncation in the USRP. If you add 0.5 to the signal, it should go away. Matt Dear Matt, how and where does the truncation is done? is it in the FPGA (DDC) ? At the output of the DDC. Matt