1694A
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 |
