How to determine the quality of wire casing?
SYV coaxial cable can be used, SMA as an intercom antenna interface.
The wireless signal, as the name implies, is a signal that does not require a wire to transmit, so it does not require a feeder, nor does it need a SMA line! Say more: SMA line? Is there such a line? I was the first time I heard! Landlord is not wrong? Should it be SMA interface? This is an interface standard, used for high-frequency signals, especially high-frequency antenna interface.
Radio frequency transmission using the feeder is generally 50-.50-.50-.50-9 and then thick is the feed tube (the figure is the feed tube), the key is to distinguish between 50 ohms or 75 ohm line , SMA is a high-frequency connector used in high-power wireless card, routing, walkie-talkie antenna output, SMA line is actually two ends with SMA connector extension cord.
Generally with PVC pipe or metal cable care, single-core cable on the use of PVC, through the road or the best use of hot galvanized pipe. In the battery, the communication room is best to use metal cable care. Other occasions generally use PVC. Check the acceptance rules for cable line construction grade GB-92. Generally see the specific design of the drawings, because the design will take into account the needs of what the tube, which depends on the relevant norms. For example, the battery compartment to view the relevant design specifications of the battery compartment.
