STATIC led (red):
It switch on if the static mode is selected and it starts to blinks when the receiver is
recording data, with the same frequency of the sample rate, if the sample rate is greater
than 1 Hz it blink anyway at 1 Hz.
Fig. 2.8 - S8 static led
ROVER led (red):
Rover led is on when the receiver is working in rover mode.
Fig. 2.9 - S8 rover led
BASE led(red):
Base led is on when the receiver is working in base mode.
Fig. 2.10 - S8 base led