I was to understand EXTERNAL CLOCK IN bypasses the internal clock, and the external clock timing gets distributed to all the other devices connected to the master clock. In other words, when the master clock is receiving an external clock signal it simply behaves as a distribution amplifier. In my application, where I only have one clocked device, I couldn't see the point of using the Esoteric master clock. I might as well use the single channel GPS derived timing connected directly to the clocked device. The Esoteric would serve no purpose as a distribution amplifier when there is only one device connected to its output.
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