Vivaldi External Clock Setting for Mutec Ref10

[meltemi (Martin)]

@Add 10mhz clock : sin wave or square wave?

An impedance mismatch of a 50Ohms clock output to the 75Ohms dCS reference clock input is liable to work unpredictably

On Mutec Ref10 SE120 only use the 75Ω outputs (outputs 3 to 8)! Outputs 1 & 2 are 50Ω outputs.