(1) impedance connector should be associated with the system and cable impedance matching. Should be noted that not all connector interfaces are consistent with 50 ohm or 75 ohm impedance, the impedance mismatch can cause system performance degradation.
(2) to ensure that the use of voltage does not exceed the maximum voltage value of connector.
(3) the highest working frequency of each connector interface has the highest frequency limit. Some business with 75 ohm design has the lowest frequency limit. In addition to the electrical performance, each interface form has its uniqueness. Such as: BNC bayonet connection, convenient use and low price, in the low resistance can be electrically connected are widely used; SMA, TNC series for the thread connection, high vibration environment on the connector requirements, SMB has a quick connect-disconnect function, it is more and more favored by the users.
(4) transmission of cable television cables because of its shielding effect for small usually consider only the impedance of the system. TV soft cable for cable deformation, it has a relatively continuous resistance and good shielding effect, can bend, price and low prices, widely used in the computer industry, but cannot be used for shielding performance requirements of high system. Shielded flexible cable eliminates inductance and capacitance, mainly used in instruments and architecture. Flexible coaxial cable due to its special properties and become one of the most common closed transmission cable. Coaxial means the signal and ground guide body in the same axis, outer conductor consists of fine woven wire, so called braided coaxial cable. This cable to the center conductor of a good shielding effect, the effect of shielding efficiency depends on the type and thickness of the braiding layer braided wire. In addition to effectively compensate for the braided cable in high frequency shielding effect. High frequency is usually used for semi rigid cable.
(5) installed
Connector mounting method mainly has two kinds: A welding center conductor, screwed with shielding layer. B contact center conductor, crimping screen shielding layer. Other methods by the above two methods are derived, such as: welding center conductor, crimping shielding layer. Methods A for no special installation tools occasions; the press-fit mounting method, high work efficiency, terminating reliable performance, and the special crimping tool designed to ensure that each produced a cable assemblies are the same, so with the low cost installation tool development, welding center conductor, crimping shielding layer the increasingly popular.