What is the difference between lotus head and coaxial head? Feeling like long. There are XLR lines, what is the balance line mean?
Now basically with copper, home in the main line with 2.5 copper core, with 1.5 copper cable can be, air conditioning line to do a separate line, according to the size of the selection, the general 4mm copper core is enough
First said that the floor wiring between ,,,, each well 4 6-core fiber = 24 core then the fiber patch panel with a 24 just .. coupler 24 (one to one) fiber jumper is generally used How many cores to buy the number of jumper (also one to one), the other core are spare. Second, the equipment area and the floor wiring between the fiber patch panels, the number of couplers is the same .... there is fiber (Fiber ends = 2 * 24 = 48 core)
Hello: - ★ . first exclude the video signal line and the power line between the interference. Because the AC power supply interference, the screen shows the 50Hz scroll bar, not a big stripes interference, and interference only appears in the fault elevator screen. - . irregular, very large stripes interference, should be bad contact reaction, 12V power cord (including 220V primary side), video cable bad contact, there will be such a phenomenon. - . "replaced by a centralized power supply, 12V electric elevator and 220V electric elevator anti-interference is the same?" ... ... regardless of 220V power supply, or 12V models power supply, the effect not much differences. Elevator of the camera are 220V transformer power supply, are placed at the top of the car. Other camera normal, it should focus on checking the cause of the fault camera itself.
