I am testing the EVB of ADF4350. And there seems to be an problem of this part. When the MUXOUT is set to N divider output, the PLL can not be locked. What shall I do?
Have you tried disabling MUXOUT, updating the frequency (by updating R0), and then choosing N counter out?
This would have to be done for each frequency. I think the MUXOUT pulses upset the band select process (which is activated by R0). Hence disabling it during band select (select three state output) is an option, (it can be re-enabled afterwards).
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