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LD2 – PLDRO Lock Alarm = High (1) = Locked / Low (0) = Not locked
LD1 – OCXO Lock Alarm = High (1) = Locked / Low (0) = Not locked
When using an external or internal reference both LD1 and LD2 should be high (1) = Good to go and all systems engaged.
If one of them is low, then something is out of lock and not a valid test.
LV = This is the tuning voltage for the varactor diode which feeds into a comparator to determine in lock condition of the PLDRO. This is used by PMI to set the alarm threshold and can be left open by the user.