Hello,
The chip of hmc833 can not locked. The ref_clock is 100MHz. The ouput clock is around 5GHz, but not stable. It is shifting left and right.
The registers are set as below:
x"00000020" &
x"0F000081" &
x"02000001" & -- reference divider 2,1
x"062003CA" & -- bit7=1 to bypass;bit11=0 to disable frac part
x"095FF972" &
x"0A002046" &
x"0B07C021" &
x"0500e090" & -- (vco reg 2) 1 11 000001 0010 000
x"05001628" & -- (vco reg 5) 0 00 10 11 00 0101 000
-- x"05002898" & -- (vco reg 3) 00?0 10 0 0 0 1 0011 000 fundamendal mode
x"05002018" & -- (vco reg 3) 00010 00 0 0 0 0011 000 doubler mode
x"050060A0" & -- (vco reg 4) 01 10 00 001 0100 000
x"05000000" & -- (vco reg 0) - leave at 0
x"03000019" & -- int Reg; 0x32 = 50,25
x"04000000"; -- frac part
Could you please show me how to fix this problem? Thank you very much for your support in advance!
Best regards,
Howard
