Erik,
That "choice" is a simple matter of the two reverse voltage protection
diodes (one on each supply input). The higher voltage will prevail, no
switching or additional sensing is necessary. That same condition exists
on the KX1, KX3 and KX2.
Much more complicated circuitry would be required to determine which
supply is providing the voltage.
73,
Don W3FPR
On 12/12/2016 7:34 PM, E T wrote:
Hi Don,
Actually, I think it does have the capability to determine which
supply is in use, since it explicitly chooses the higher voltage for
operation. So in the software it would be possible to not accrue Amp
Hours when not using the internal battery. :-)
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