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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 19:31:33 -0700 |
User-agent: |
Thunderbird 1.5.0.9 (Windows/20061207) |
Hi,
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):
http://img157.imageshack.us/img157/8648/plot1gi6.gif
http://img245.imageshack.us/img245/8528/plot2fp1.gif
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!
Chris