Thanks Eric ! I have a few questions more. 1- I've successfully retrieved the intermediate values by enabling logging to files. Though, I've no idea about how I "could just wire in your own logging stuff wired in by reaching into the hier_block and connecting away", as an alternative way to reach the same results. 2- I am using USRP2 with an RFX2400 daughterboard. Datasheets indicate 17dBm for Transmit power, but I cannot find any information about Receive power. Does anyone know Input power for RFX2400 ? 3- I have only one USRP2 and would like to use a loop-back cable to connect the output to the input of the same USRP. So I would, for example, run benchmark_tx and benchmark_rx in two different shells. Can I do it without any worry ? I am asking the question because it seems that many people always ran a such test with two USRP (one for Tx and the second for Rx) 4- My last question refers to the error message "usrp2::tx_raw: FIXME: short packet: 1 items (32 bytes)" received when I run benchmark_tx with a modulation other than gmsk. This problem has been the subject of a couple of posts such as this one : http://osdir.com/ml/discuss-gnuradio-gnu/2009-06/msg00284.html . But it seems not to have been solved. Thanks in advance for your help. Chris
________________________________ De: Eric Blossom [mailto:[email protected]] Date: lun. 22/02/2010 13:20 À: Paring, Christophe Cc: [email protected] Objet : Re: [Discuss-gnuradio] PSK demodulation : get exact point before deciding what is the closest constellation point On Mon, Feb 22, 2010 at 12:03:28PM -0500, [email protected] wrote: > Hi all ! > > I am dealing with PSK (BPSK, QPSK, 8PSK) modulation/demodulation ; > in demodulation, I would want to retrieve the exact point (vector) > before finding the closest constellation point. K > > Is there any way to get it with d?psk.py codes or whatever else ? > > Thanks in advance for your help. > > Chris Chris, If you look at the code (gnuradio-core/src/python/gnuradio/blks2impl/dbpsk.py et al.), you'll see that you can enable logging (and get all the intermediate values logged to files) or you could just wire in your own logging stuff wired in by reaching into the hier_block and connecting away. Eric _______________________________________________ Discuss-gnuradio mailing list [email protected] http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
