Hi I think the USRP can provide the minimum decimate rate of 4. So I changed the output data format from short to char. With 8-bit I & Q decim = 4 ->64M/4= 16MS/sec ,I&Q -> 32MB/sec. That is within the range of my USB speed. In the make_format() function I set the width = 8, shift = 8. Then the out put of USRP will be char data. But when I read the data from the USRP, I found all of them are just 0s. When I change the decim_rate = 8, then I can get the right results. So I want to know what is wrong in my method? How can I get data with decim_rate = 4? -- Posted via http://www.ruby-forum.com/.
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