On 08/23/2011 10:36 AM, Bastien Auneau wrote: > Hi All > > Using USRP N 210, WBX board, GPSDO, UHD 3.2.2, under Windows 7 > > We want to use the example scripts to capture then playout a signal we > get from the air (satellite link with bursts). We proceed as follow : > 1. capture using rx_samples_to_file.exe --type short --rate 10000000 > --freq 1057232000 --gain 10 > > 2. playout the newly captured file > tx_samples_from_file.exe --type short --rate 10000000 --freq 1057232000 > --gain 2 > > 3. Using a spectrum analyzer, we expect to see similar things when > looking at signal from air (few small carriers, bursty), than when > looking at USRP played out signal. > > But the USRP only output an around 2.5 MHz carrier, which does not > contains the burst of the original carrier (looking on live signal the > centered carrier constantly goes up and down). The carrier is extremely > steady during all the playout time. Also, the doc > (http://www.ettus.com/downloads/ettus_daughterboards.pdf) specifies > 30MHz bandwidth, why can't we see the same bandwidth from played out > signal than from original signal ? > > Also, we use the rx/tx port of the WBX board to capture then to playout >
Here is my take on your method: http://gnuradio.org/redmine/projects/gnuradio/wiki/CannedResponses#Flying-Blind -josh _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
