Curt, NU7R, wrote, in part: > I am using an Omni VI opt 3 referenced to an HP Z3801A. > It feeds its signal to pin 1 of U12 (osc in) on the Logic > Board. Hmmm, wonder if there is such an "injection" pin point somewhere in the Orion?? Presume Curt routs a small coax into the "interstices" of the Omni. 73, Jim KH7M