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DS90UB964-Q1: DS90UB964 Power-over-Coax question

Part Number: DS90UB964-Q1

customer reported  Power-over-Coax issue in DS90UB933 and DS90UB964. Please review the schematics.

1)PASS and LOCK status unstable

2) remove R19 and power DS90UB933 and 964 independent, then PASS and LOCK status stable