LMH1983: TOF2/3/4 Alignment not detected, while PLL Locked

Part Number: LMH1983


It was found in LMH1983 prototype, that TOF2/3/4 can not detected, but PLL1/2/3/4 are all locked.

Would you help analysis this issue? As TOF2/3/4 are used for external LED indicators. In circuit, D18 LED is off, D17 and D19 are on.


Best Regards

Rocky Chen

4 Replies