2 Check 10MHz REF at pin 9 of U12.
3 Adjust 10MHz REF with C31.
4 Check for lock pulse at pin 11 of U13, Scope probe on x10 position; .2 volts per div, and .1us time/div.
5 Adjust L12 thru L21 on Xtal Osc. LO Mixer Bd. for the narrowest wave form.