The Wheelman HPX-200 antenna uses a single LED that provides system information based on the color of the LED as follows:
Blinking Red - Power on
Blinking Amber - WAAS
Blinking Green - HPX-10
Blinking any color - Receiver operational
WARNING: If at anytime the LED turns to a solid color for an extended period, the receiver has malfunctioned. In the event of a malfunction, power the system down and power it back on outside under open sky, not inside of a barn or covered paddock.