5. LED and Push Button description
5.1 Adaptor Board
①Red LED: POWER, always on when power on
②Blue LED: RXD, often light while DUT GPS module receiving data
③Green LED: TXD, flash once per second when DUT GPS module start sending data
④Push Button: POWER, push to power on and off the EVK
5.2 Main Board
PPS LED: Flash once per second after satellite position fixed