On 02/18/2010 08:06 AM, Charles Brain wrote:
Hello,I am trying to write a python script which will allow me to take some 16 bit IQ samples from a file and write them out to my USRP2/WBX. The background is that I am trying to implement what has been done on here http://www.m0dts.co.uk/datv_live.htm but instead taking the output of gbDVB piping it through an app I am writing (to do the raised cosine filtering) then piping that to the USRP2 Unfortunately GnuRadio is a bit daunting at the moment especially finding what various things are especially as some usrp blocks don't seem to exist for the usrp2 or their input formats are different. What I need to do is set the tx frequency to 1249 MHz select the correct antenna output then pipe samples from the input file to the usrp2 sink. Any pointers would be most useful. Be gentle - Charles
Charles,Glad to hear from you. I would suggest that the easiest thing for you to do would be to build a flowgraph in GRC. Assuming your file is binary, you can just use the file source and a USRP2 sink.
I've attached a sample flow graph. I'm away from any hardware right now so I can't test it, but it is simple enough it should work. You'll need to set the interpolation ratio based on the sample rate of your data.
Matt
send_shorts.grc
Description: application/gnuradio-grc
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