4. Then input “mask”, you can see 4 satellites are shutted up.
5. Then input “unmask GPS”, “unmask BDS”, “unmask GLO”, “unmask GAL”, you can make the board track satellites signals again. (If you want do similar process to some frequency signal like L1, E5B, you can input “unmask L1”, “unmask E5B”).
6. At last, you can input “mask” and send again, If the message box shows like this below. Then all the satellites’ signals are tracked. Remember to send “saveconfig” to save all the configuration.