When using a multimeter to measure the line, the main purpose is to check whether there is any damage to the line. You just need to unscrew the BNC head and use a multimeter to set it to the on/off position. One end is connected to the middle signal core, and the other end is connected to the external shielding layer to check for any short circuits (note: the other end must also be made into a BNC head or separated from the main core and shielding layer). If there is no short circuit, it is normal, and if there is a short circuit, it is abnormal. Check if there is any damage in the wire.
Room 301, Building 2, No. 2 Huangyong Industrial Road, Zhongtang Town, Dongguan City, Guangdong Province