What is the prefered way to interface with reference input of adf4350/adf4360 ?
should it be sine wave / clipped sine wave or CMOS signal ?
What are the trade offs ?
Faster edges have lower jitter, (phase noise). But these can cause spurs due to their high harmonic levels.
Pure sine waves are cleanest from a spurious perspective, as they contain no harmonics. They have the slowest edges, which can degrade phase noise.
Clipped sine wave can be considered a compromise, and a best of both. This is used on the evaluation boards from the TCXO.
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