Re: [Discuss-gnuradio] RFX 900 200mW
Fantastic.. I just had not realized this.. (i did not know about the filter at first) and I wanted to be sure about that.. It actually sounded too good to be true.. because I'm already getting a usable signal (10 m distance indoors) with the filter.. therefore I expect really good performance without it.. Many thanks Matt.. PS. will the 50 MHz - 1 GHz transceiver be ready for the end of the summer.. I'm looking forward to have one.. :) On Tue, 2008-07-29 at 21:10 -0700, Matt Ettus wrote: > Vincenzo wrote: > > Thanks Matt! > > really precious answer.. > > actually, transmitting an 8 MHz wide signal at 820MHz without bypassing > > the ISM filter.. what kind of attenuation should I expect? ..I mean.. > > just a rough estimate of its magnitude.. > > > > > What I meant was that if you are working WITHIN the ISM band (902-928 > MHz) you could get a couple extra dB by bypassing the filter. If you > are outside of the band, you MUST bypass it. You could be getting as > much as 30 dB off attenuation there. > > Matt ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] compare data from usrp_siggen.py and usrp_oscope.py
Hi, I compared the data from usrp_siggen.py and usrp_oscope.py using matlab, but wave from usrp_oscope.py data has twice longer wavelength. Could you tell me why this happaned? do I have to change the parameters? Also, I added the self.connect(self.txpath, gr.file_sink (gr.sizeof_gr_complex, "data.dat")) in the benchmark_ofdm_tx.py to get data. However, there are huge amplitude difference between the wave from usrp_oscope.py data and the wave from benchmark_ofdm_tx.py data. I used the function http://gnuradio.org/trac/wiki/Octave Could you give me some idea? Thank you. James, ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] Re: Basic RX. - usrp_wfm_rcv.py
OK Patrick I'll take into account next time. At the end I could solve my problems. Now I'm trying to transmit with the Basic TX Thanks . ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
Re: [Discuss-gnuradio] modelsim help using megacells
George Nychis wrote: George Nychis wrote: Hi all, I am having trouble running a testbench in ModelSim which uses megacells. I added megacells such as fifo_4kx16_dc.v and fifo_1kx16.v, but when trying to simulate I get errors such as: Error: (vsim-3033) Z:/gnychis/fpga/usrp/fpga/megacells/fifo_4kx16_dc.v(89): Instantiation of 'dcfifo' failed. The design unit was not found. I can find dcfifo in the altera_mf library, and it builds just fine. I'm not sure how linking goes in ModelSim? I added altera_mf to my search and still get an error: # ** Error: (vsim-3033) Z:/gnychis/fpga/usrp/fpga/megacells/fifo_4kx16_dc.v(89): Instantiation of 'dcfifo' failed. The design unit was not found. # Region: /tb_timestamps/rx_buffer/rx_usb_fifo # Searched libraries: # C:/altera/72sp2/quartus/eda/sim_lib/altera_mf # work I'd greatly appreciate any help. I think I survived with: vsim -L altera_mf work.tb_timestamps Took a little bit more work first though, thanks to Brian: cd c:/altera/72sp2/quartus/eda/sim_lib vlib lpm vlib altera_mf vlib altera_primitives vlog -work lpm 220model.v vlog -work altera_primitives altera_primitives.v then finally, vsim -L altera_mf work.tb_timestamps - George ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
[Discuss-gnuradio] parameters of benchmark_ofdm_tx.py?
Hi, are there any parameter that I can modify benchmark_ofdm_tx.py for number of subchannels, or amplitude of each subchannels? Also, I want to save the data with benchmark_ofdm_tx.py and benchmark_ofdm_rx.py adding self.connect(self.txpath, gr.file_sink (gr.sizeof_gr_complex, "data.dat")) self.connect(self.rxpath, gr.file_sink (gr.sizeof_gr_complex, "data.dat")) does it make sense? I don't know why but I have error in ofdm_rx.py. Thank you for your help. James, ___ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
