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Check whether the antenna center is bad, whether the antenna and antenna head are connected to dirt, and whether the antenna is broken. When using it in daily use, please grab the intercom correctly, do not hold the antenna to pull, and do not pull the antenna, otherwise it will easily lead to poor......

1. You can only use an antenna that is used or recognized. The unspeakable antenna may damage the intercom or the provisions of the Radio Administration of the Ministry of Information Industry after being converted or added. 2. Do not get an antenna with your hands when using it. 3. The intercom a......

For example, if the terminal black screen is recommended, it is recommended to make a review after shutting down. If it is still not displayed normally after turning on, it is recommended to contact the local dealer or return to the factory to deal with it.

Check whether the antenna is intact, whether the antenna is loose or damaged, or removes the intercom antenna to check whether there are foreign objects in the antenna interface. Excluding the above reasons, please contact the local authorized maintenance station or return to the factory for mainten......

DMR is an open digital standard formulated by the European Communications Standards Association. PDT is a professional wireless communication digital cluster standard formulated by China's independent intellectual property rights. Tetra is an open digital cluster standard formulated by the Europea......

The causes of errors may be: 1. Software use errors, 2. Written terminals are in a state of booting? 3. Does the writing frequency be the original factory standard writing frequency? 4. If the USB interface is connected to the computer, is it installed? Is the 5 port selection correct? Excluding the......