"Phase is Locked" LED is On when "805 REF IN" disconnected.
Having a "805 Ref In" signal disconnected from RF board, the
card's front panel LED reports that "Phase is Locked", which
could be misleading for user.
#1 Updated by Ed Cullerton over 8 years ago
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This is a feature of the Wenzel phase locked oscillator. The specification does not require a phase lock indication when there is no RF connected to it. There are test points on the RF board to determine if RF is present.