[Elecraft] k3 external freq ref

[stephen pearce]

It is not clear to me from the schematic or the owner manual whether
this is for a 10 MHz or   49 MHz input signal .. the faq indicates
that it is 10 Mhz (and presumably converted up to
49 MHz ) but on cursory perusal of the documentation I cannot see how
this is done.

I was hoping to use a gps disciplined xo with a 10 Mhz output as the
external reference ...