Quick video of the controller operation while under construction and testing. There are 4 leds just to the left of the microprocessor in the center, which would indicate (Green) GPS Signal status, Blue indicates a sampling signal is received, Orange flashes each time a signal is received from the amplifier, and Red indicates "interference mode". Green in the upper right of the main board, by the small coax, indicates GPS Module status, the large flashing red on the right of the 'piggyback' board indicates that there is no USB connection in use, and the lower 'red' indicates power. There are two buttons by the center small leds, one (blue) controls the LCD display menus, and the lower (black) manually resets the microprocessor.