Hi Vincenzo,
1) What is your recording system (PC specifications)?. 2) How fast your hard drive can read/write data? because working with 8MHz means that your hard drive must be able to sustain writing 32MByte/sec? 3) Do you use ext2 or ext3 ? Ext2 is very efficient in writing. 4) Are you recording complex or interleaved Short 8 MHz samples? Firas Vincenzo Pellegrini wrote: > > Matt, > > > Tonight > I have been recording slices of commercial FM spectrum, all centered > right where a good station transmits, > > the first slice was 300Khz wide, > the second was 2MHz > the third was 4MHz > > then I sent all these signals to my Hifi FM receiver via the basicTX... > all went fine and I could hear a good stereo sound from my recordings.. > > then I tried my nightmare: the 8MHz slice of spectrum.... > the output was extremely weak but you could easily tell from what you > could hear that the samples were not being sent out at 8Msps: the very > poor audio was also "slow" as it happens when you set the interpolation > rate too high, compared to the sample rate your samples were taken at... > well, this is not just some attenuation next to the shoulder of my ofdm > signal.. this is the whole signal .. gone.. > > So, I'm really not asking you, Matt, to solve a problem which is my duty > to solve...and don't even want to bother the whole list with this > stuff... > > ...but please say it loud, say it clear: "vincenzo, you've made very big > mistakes, because the USRP really can transmit an 8MHz wide signal > without distorting it significantly, I've tested it"... > > ..so even if this means that I still got much to learn, and much to work > to find out where I'm doing wrong... > > ...well, it would be much better than being forced to give up what I'm > working upon.. > > please... > > thanks > > vincenzo > > PS. > I'm using default FPGA configuration... > > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > http://lists.gnu.org/mailman/listinfo/discuss-gnuradio > > -- View this message in context: http://www.nabble.com/8MHz-Tx-Bandwidth..-Nightmare-and-Fear-tf4374848.html#a12471008 Sent from the GnuRadio mailing list archive at Nabble.com. _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
