Apr 8, 2009 #1 H HKYO Newbie level 1 Joined Apr 7, 2009 Messages 1 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 1,287 pll unlock my pll unlocks in specific voltage range about 10mV ex) Freq. unlock voltage(+- 10 mV) 86oMHz 1.63 870MHz 1.65 . . and this unlock voltage range changes when i change the bias of 4/5 divider. also when temperature is -25 degrees C unlock voltage range increases like 100mV. This symptom happens when pll locks high frequency. Somebody please help me.
pll unlock my pll unlocks in specific voltage range about 10mV ex) Freq. unlock voltage(+- 10 mV) 86oMHz 1.63 870MHz 1.65 . . and this unlock voltage range changes when i change the bias of 4/5 divider. also when temperature is -25 degrees C unlock voltage range increases like 100mV. This symptom happens when pll locks high frequency. Somebody please help me.
Apr 9, 2009 #2 V VSWR Advanced Member level 3 Joined Feb 7, 2002 Messages 746 Helped 103 Reputation 206 Reaction score 24 Trophy points 1,298 Activity points 5,423 unlock pll Could be many reasons. WinRAR your design incl schematic diagram and upload here.