How can I check the SeaWatch® Marine TV antenna to make sure it is working?

Check the voltage from the power supply for 110V AC operation and 12 vDC on DC operation with a voltmeter. If you are experiencing difficulties, try moving out of the slip to see if interference from other boats might be causing your reception problem. VHF TV transmission is line-of-sight, so at sea level you’re quite possibly out of “view” of the TV signal.