Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-12 Thread shyamnath gollakota
Hi Eric, The OS I am using is Linux 2.6.17-1.2174_FC5 The hardware I am using is Memory of 512MB, Intel(R) Celeron(R) CPU 2.53GHz. As u predicted, I do observe a number of underruns on stderr when the interpolation rate is set to low values. This might explain the results for the case when interp

Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-12 Thread Eric Blossom
On Tue, Dec 12, 2006 at 09:35:00AM -0800, John Clark wrote: > Eric Blossom schrieb: > > > >Are you seeing underruns ("uU") on stderr? If so, then for your low > >interpolation rate cases your system is failing to be able to drive > >the USRP at full speed (32MB/s). What kind of h/w are you runnin

Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-12 Thread John Clark
Eric Blossom schrieb: Are you seeing underruns ("uU") on stderr? If so, then for your low interpolation rate cases your system is failing to be able to drive the USRP at full speed (32MB/s). What kind of h/w are you running? Speaking of which, what does 'uO' mean? Thanks John Clark.

Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-12 Thread Eric Blossom
On Tue, Dec 12, 2006 at 01:03:08AM -0500, Shyam wrote: > hi Eric, > The daughterboard I use is RFX2400 so I set -f 2.45G ( btw my gnuradios > have been properly set up since benchmark_tx and receive work fine for > gmsk) . I have tried the below stated experiment using two antenna > types to see

Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-11 Thread Shyam
hi Eric, The daughterboard I use is RFX2400 so I set -f 2.45G ( btw my gnuradios have been properly set up since benchmark_tx and receive work fine for gmsk) . I have tried the below stated experiment using two antenna types to see if it is due to the antennas but it is consistent across antennas

Re: [Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-11 Thread Eric Blossom
On Mon, Dec 11, 2006 at 08:30:25PM -0800, Shyamnath wrote: > > hi, > I am new to gnuradio architecture and am trying to learn about it. I was > using the usrp_siggen,py sample code provided with different interpolation > rates (4, 8,12,16,64) since it has to be a multiple of 4. the observations

[Discuss-gnuradio] Interpolation in usrp_siggen

2006-12-11 Thread Shyamnath
hi, I am new to gnuradio architecture and am trying to learn about it. I was using the usrp_siggen,py sample code provided with different interpolation rates (4, 8,12,16,64) since it has to be a multiple of 4. the observations are as follows (which cannot explain) 1) For interpolation rates se