As long as the wireless FM radio is connected to the antenna and then the transmitting antenna is placed at the highest point of the outdoor, the terminal uses the FM transmitter to drive the tweeter, and the FM radio can be received through the market. Equipment maintenance is also very simple, just need to detect a terminal speaker or front-end equipment. The problem of traditional broadcast overhaul is completely avoided. (The maintenance of cable broadcasts needs to be detected from the receiving terminal, the line, and the front-end equipment to determine which part of the problem.) For the auditorium, theater, etc., not far from the speaker, generally adopt the direct feeding method of low resistance and large current, the transmission line requires a dedicated speaker line, and for the public broadcasting system, due to the wide service area and long distance, in order to reduce the transmission line The loss is often transmitted by a high-voltage transmission method. Since the transmission current is small, the transmission line is not required to be high, and an ordinary audio line is generally used, which belongs to an analog audio line. Public broadcasting The power light indicates normal no sound output, but the output relay is heard. The power supply measured by the meter is normal. If it is normal, the signal input terminal of the signal input terminal can be used to hear a large current. The sound is initially determined that the power amplification part is basically normal, that is, whether the signal lead of the light shaking signal is incapable or poorly contacted. If the contact is poor, the meter is used to measure that the line is faulty and normal. Used Laptops For Sale,Old Laptop For Sale,Used Laptop Price,Refurbished Laptops For Sale Guangzhou Panda Electronic Technology Co., LTD , https://www.panda-3c.com