Naval Electronics, Inc. 7028 West Waters Ave Suite 393, Tampa, Florida USA 33634Phone (813) 885-6091, Fax (813) 885-3601, E-mail sales@naval.comInstallation InstructionsPR-12, PR-12BE and PR-20BE Active Antenna Power SuppliesAll power supplies are strapped for either 110 or 220 VAC at the factory.The strapping can be changed by a qualified technician in the field, as shown on thediagram at the bottom of this page.The AC input block accepts either 110 or 220VAC (depending on strapping).Pin 1 AC Hot (connect one AC lead here)Pin 2: Not used.Pin 3: Neutral AC (connect other AC lead here).Pin 4: Ground or Cable ShieldThe DC input block accepts either 12 VDC or 24 VDC.Pin 1: +12VDCPin 2: +24VDCPin 3 Negative