- Remove all power to the MAX2769CEVKIT
- Remove jumper W3. This will remove power from the on-board oscillator (U8).
- Remove C15. This will prevent damage to the on-board oscillator (U8).
- Add/Replace R1 with a resistance equivalent to the source impedance of the external oscillator. This will ensure external reference oscillator is properly terminated.
- Apply external oscillator to J10 via coax cable.