Category: Datasheet/Specs
Product Number: ADMV4530
ADMV4530 includes registers 1B,1C, and 1D for setting a Phase Word value (24-bits total) but I do not see a register containing a bit for enabling/disabling the Phase Word use. Is it always on or always off?
I am operating the ADMV4530 in Factional-N mode and so far when I adjust the Phase Word values, I am not yet seeing any change in the spur performance.
There is clear degradation in spurious products within +/-1MHz of the desired signal when switching from a Integer-N situation to Fractional-N. I am accustomed to seeing the Phase Word improve such spurs on the ADF4372, but not seeing any change yet on the ADMV4530.
My test parameters are;
fLO=28.25GHz
fIF=2.5GHz
fREF=100MHz (Ovenized, Crystal Reference, Wenzel)
