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[Discuss-gnuradio] USRP producing samples larger than 2^8

From: Chris Stankevitz
Subject: [Discuss-gnuradio] USRP producing samples larger than 2^8
Date: Wed, 14 Mar 2007 16:52:11 -0700
User-agent: Thunderbird (Windows/20061207)


Should I get samples with a magnitude > 128 from the USRP no FPGA gain? I believe the answer is no. Take a look at these plots of the data I am getting (plot of real portion only):



I collected the data using this method:

./usrp_rx_cfile.py -d 16 -f 1575420000 -g 0 -N 4000000 file.dat

Furthermore, I created a test jig which wrote USRP output to stdout and verified these spikes are not in the binary file or the binary file reader. I'm using the DBSRX with a GPS antenna and a low noise amplifier.

Thank you!


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