Belden 1694A 75 Ohm Coax SDI Cable, Foil + 95% Braid, PVC outer sheath 6.96mm, Black, Sales Unit 1 metre(s) Belden 1694A is a widely used, low-loss 75-ohm RG6 coaxial cable designed specifically for professional serial digital video (SDI) applications, including analog video, HD-SDI, and 6 Gb/s UHDTV Product Overview 75 Ohm SDI Coax, RG-6, 18AWG solid bare copper conductor, PE insulation, Foil 95% tinned copper braid shield, PVC jacket, CMR. Key Features and Specifications Impedance: 75 Ohm nominal impedance, essential for video signal integrity. Conductor: 18 AWG (American Wire Gauge) solid bare copper conductor. Insulation: Gas-injected foam high-density polyethylene (FHDPE) insulation for low signal loss. Shielding: A dual shield system comprising a 100% coverage Duofoil® (aluminum foil/polyester tape/aluminum foil) and a 95% coverage tinned copper braid for excellent RFI and EMI interference rejection. Jacket: PVC (Polyvinyl Chloride) jacket, which is often CMR (riser) rated, suitable for indoor use and, in some colors like black, also UV resistant for outdoor aerial applications. Overall Diameter: A nominal diameter of 0.274 inches (6.96 mm). Applications: Suitable for a wide range of professional broadcast and A/V equipment, including gear from Blackmagic, AJA, and Grass Valley. It is sweep-tested from 5 MHz to 6 GHz. Typical Applications The Belden 1694A cable is highly regarded in the professional broadcast industry for its reliability and performance over long distances. Digital Video: Used extensively for standard definition (SD-SDI), high definition (HD-SDI 1080i/p), 3G-SDI (1080p/50 or 1080p/60), and 6G-SDI (UHDTV) video signals. Analog Video & Audio: Its superb bandwidth and low capacitance also make it a popular choice for low-frequency analog audio and older analog video formats. Home Entertainment: Can be used in high-quality home setups for HDTV, CATV, and satellite television installations. Attenuation (Nominal) Attenuation values help determine the maximum cable length for error-free signal transmission at various frequencies. Frequency Attenuation (dB/100 ft) 1 MHz 0.24 dB 10 MHz 0.71 dB 100 MHz 2.1 dB 1 GHz (1000 MHz) 7.1 dB 3 GHz (3000 MHz) ~13.7 dB 6 GHz (6000 MHz) ~20.9 dB
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