I'm capturing a 3 GHz QPSK signal with 5 MHz symbol rate by sampling the signal at 6 times the symbol rate. The B210 is externally referenced to a very clean 10 MHz reference. My measurements of the EVM sampling the signal for \~0.5 seconds are pretty poor \~30-40%. I can provide more setup details but I'm wondering if others can comment on what EVM I can expect. I'm hoping this isn't a fundamental limitation of this hardware system.
Thanks, Chris
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