Trouble with phase locked loop: phase comparator is just showing the VCO output (with picture)
Your reference oscillator p-p voltage is a 5V logic level: -



The chip is a standard 4000 series CMOS part that has voltage levels of: -



You're running at 10V and the guaranteed minimum high voltage level on a 10V supply is 7.5 volts. Do you see where this might be your problem?