GPS invalid troubleshooting method

Question：GPS invalid

Check whether the GPS antenna is firmly plugged into the MDVR；

Put the MDVR GPS antenna in an outdoor open place and check the signal strength；

Insert the GPS antenna that works normally on other MDVR into this MDVR；

Use a multimeter to measure whether the MDVR GPS feeder has 3V output. If there is no 3V output, the GPS feeder may be in poor contact；

GPS module damaged。

问题：GPS无效

检查GPS天线有没插紧；

把MDVR GPS天线放到室外空旷处，查看信号；

把其他MDVR上面确认好的GPS天线换到这台MDVR上面；

万用表测量MDVR GPS馈线，是否有3V输出。如果没有3V输出，可能馈线接触不良；

GPS模块损坏。