[Discuss-gnuradio] Short pulses and ringing

2006-03-09 Thread Marcus Leech
Many of you know that I'm experimenting with pulsar detection and monitoring tools for Gnu Radio, as part of a larger radio-astronomy toolkit for Gnu Radio. Pulsars produce narrow pulses with quite fast rise times, with pulse repetition rates of less than 1Hz up to tens or hundreds of Hz. Th

Re: [Discuss-gnuradio] SCHED_FIFO and NPTL

2006-03-09 Thread Lamar Owen
On Wednesday 08 March 2006 14:33, Eric Blossom wrote: > I was burned by ext3 with regard to streaming disk throughput. > I ended up remounting the relevant filesystem as ext2 to avoid the > problem. I have no info regarding CPU and/or preemption issues during > journal posting. If we never go to

Re: [Discuss-gnuradio] frequency tuning word quantization

2006-03-09 Thread Lamar Owen
On Wednesday 08 March 2006 11:35, Eric Blossom wrote: > Here are a couple of specific suggestions: I'll second the suggestions, and add a third for those who want to do FPGA development: 'Digital Signal Processing with Field Programmable Gate Arrays' 2nd Ed, Uwe Meye-Baese. Published by Springe

Re: [Discuss-gnuradio] Short pulses and ringing

2006-03-09 Thread Lamar Owen
On Thursday 09 March 2006 08:45, Marcus Leech wrote: > Pulsars produce narrow pulses with quite fast rise times, with pulse > repetition rates of less than 1Hz > up to tens or hundreds of Hz. The pulses tend to have fairly-fast > rise times. > How to FIR filters react to fast-rise-time pulses?

Re: [Discuss-gnuradio] SCHED_FIFO and NPTL

2006-03-09 Thread Eric Blossom
On Thu, Mar 09, 2006 at 10:55:55AM -0500, Lamar Owen wrote: > On Wednesday 08 March 2006 14:33, Eric Blossom wrote: > > I was burned by ext3 with regard to streaming disk throughput. > > I ended up remounting the relevant filesystem as ext2 to avoid the > > problem. I have no info regarding CPU an

[Discuss-gnuradio] flex board updates

2006-03-09 Thread Matt Ettus
If you have or will have a flex400 or flex2400 board, you should upgrade your gr-usrp to the latest CVS (as of a few minutes ago). It will now work with the new Flex2400, and I made some performance improvements for the Flex400. I don't know if sourceforge still has a delay for anonymous CVS, b

Re: [Discuss-gnuradio] Short pulses and ringing

2006-03-09 Thread Martin Dvh
Lamar Owen wrote: > On Thursday 09 March 2006 08:45, Marcus Leech wrote: > >>Pulsars produce narrow pulses with quite fast rise times, with pulse >>repetition rates of less than 1Hz >> up to tens or hundreds of Hz. The pulses tend to have fairly-fast >>rise times. > > >>How to FIR filters reac

[Discuss-gnuradio] USRP Update -- March 9th, 2006

2006-03-09 Thread Matt Ettus
Design Files The schematics and layouts for all the new daughterboards, including the LFTX, LFRX, Flex400, and Flex2400 are now available on the download page of ettus.com. If you find any missing files, please let us know. -- Daughterboard News