今天外业同事反映天宝（trimble）GPS接收机屏幕上出现了如上图的信息，PC loader in control。我也是第一次看到这个信息，百度搜索不出来，后来用bing，搜索pc loader in control trimble GPS reciever，第一条出现了如下信息：
Restart the receiver as a last resort (turn off and then turn it on again). The message PC Loader in Control appears on the front panel.The WinFlash utility is in use. Complete the WinFlash task and then exit the utility. The WinFlash utility was started then the data cable was disconnected. Plug the data cable back in and then restart the receiver.
PC Loader in Control 显示在屏幕表示WinFlash工具在使用，在它使用的时候，数据缆是不连接的；当WinFlash 工具完成了，重新插回数据缆，并重启接收机。