... the 3 qualified test cords (launch cord, field calibration cord, tail cord) are of the same type (OM1, OM2, OM3 or OS1) as the cabling to be tested. The field calibration cord Reference Connectors ... 3-Test Cord Method Disconnect the Field Calibration Cord in accordance with Item 11 (repeated below). For a Link, the 2 x adaptors are removed with the field calibration cord. [For a Channel, ... Reference Setting is default method Item 10 Field Calibration Cord, Launch & Tail Cords shall all have Reference Connectors Item 11 Method of Removal of Field Calibration Cord Adaptors for Link...