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From: | Marcus D. Leech |
Subject: | [Discuss-gnuradio] Passband anomaly with dual-channel LimeSDR |
Date: | Thu, 21 Dec 2017 13:16:11 -0500 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 |
http://www.ccera.ca/files/dual_channel_limesdr.png Then the flow-graph that produced it: http://www.ccera.ca/files/untitled.grcThe differences are somewhat subtle--one channel has a 5dB roll-off, while the other doesn't. This may just be subtle analog differences in the noise spectrum. But it might be useful to check that filters are being set properly in the two-channel scenario.
Also, the DC offset is quite large, but this may not be a "fair" test, since the inputs are just "dangling" with no external signal at all.
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