[Elecraft] K3EXREF Query

[Brian]

I was wondering if there is any kind of "sensibility" check done on the 
input reference?

For example, I've been fooling around with a double oven controlled XO.

Starting from cold it is > 200Hz off.  It takes ten minutes or so to be 
within 10 Hz. It gets into the tenths of Hz accuracy region in another 
10 minutes.

Clearly one would not want the K3EXREF to lock to this oscillator during 
the first 10 minutes or so.

73 de Brian/K3KO