Communication cable Manufacture price 75 ohm rg59 cctv cable coaxial cable
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RG59 Basic construction | ||||||||
STANDARD SHIELD | TRI-SHIELD | QUAD-SHIELD | ||||||
CONDUCTOR | MATERIAL | BC/CCS | BC/CCS | BC/CCS | ||||
Nom.Dia. | 20AWG | 20AWG | 20AWG | |||||
DIELECTRIC | MATERIAL | Foam PE | Foam PE | Foam PE | ||||
Nom.Dia. | 3.66mm | 3.66mm | 3.66mm | |||||
SHIELD | MATERIAL | Al Foil+Al Braiding | Al Foil+Al Braiding+Al Foil | (Al Foil+Al Braiding)*2 | ||||
COVERAGE | 40%-95% | 40%-95% | 35%-53% | |||||
JACKET | MATERIAL | PVC/PE | PVC/PE | PVC/PE | ||||
Nom.Thick. | 0.80mm | 0.80mm | 0.86mm | |||||
Nom.Dia. | 6.10mm | 6.10mm | 6.70mm | |||||
Application | RG-59 is often used at base band video frequencies, such as composite video. It may also be used for broadcast frequencies, but its high-frequency losses are too high to allow its use over long distances; in these applications, RG-6 or RG-11 is used instead. In cases where the transmission distance is too long for these media, such options as UTP (unshielded twisted pair) or fiber optic can be used. RG-59 coaxial cable is commonly packed with consumer equipment, such as VCRs or digital cable/satellite receivers. Manufacturers tend to include only RG-59 cables because it costs less than RG-6 does. However, given the short lengths provided (usually 4–6 ft or 1.2–1.8 m), this is generally sufficient for its typical use. RG-59 is frequently used to synchronize two digital audio devices, such as ADAT optical devices. This is called word clock. | |||||||
Nom.Dia. | 1.30mm | 1.30mm | 1.30mm | |||||
Application | A common type of 75 ohm coaxial cable is cable television (CATV) distribution coax, used to route cable television signals to and within homes. CATV distribution coax typically has a copper-clad steel (CCS) center conductor and a combination aluminum foil/aluminum braid shield, typically with low coverage (about 60%). 75 ohm cables are also used in professional video applications, carrying either base band analog video signals or serial digital interface (SDI) signals; in these applications, the center conductor is ordinarily solid copper, the shielding is much heavier (typically aluminum foil, and 95% copper braid), and tolerances are more tightly controlled, to improve impedance stability. Cables typically have connectors at each end. |
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