What effect does noise on the Vvco line have on the PLL output. Do we have a spec, similar to PSRR?
The PSRR equivalent for VCO's is called pushing.
A high pushing figure on a VCO means a very low noise supply is required, whereas a low one means a noisier supply is OK. The upcoming CFTL-0147 uses the ADF4350 to give a specific example of the effect of pushing on VCO noise.
Generally the ADP3300 and ADP150 regulators can be used to supply power to the ADF4360 parts without any issues occuring.
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