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From: | Marcus D. Leech |
Subject: | [Discuss-gnuradio] More experiments with 8-bit options on USRP2 |
Date: | Thu, 10 Nov 2011 12:22:45 -0500 |
User-agent: | Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.23) Gecko/20110928 Fedora/3.1.15-1.fc14 Thunderbird/3.1.15 |
I configured the source for 50Msps, with 8-bit samples. My AMD Phenom II X6 1090T was able to keep up, but if I inserted even a single multiplier block between the source, and the FFT, I started getting nearly-continuous 'O'.
This suggests to me that actually "doing anything" with data at 50Msps is going to be a challenge. The way the FFT sink works is that it decimates the input quite aggressively (in vectors of FFT-length) before doing anything with the data--it throws most
of it away in order to support the configured frame-rate. -- Marcus Leech Principal Investigator Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
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