Coaxial Cable Issues with 3 Gbit/sec Video

Bibliographic Reference(s)

• 1. Although it matches the theatrical frame rate , 1080p/24 would require a standard film conversion (3:2) to become 60 field or frame video compatible, 1080p/30 would require a dual-frame exposure to accomplish the same. In both cases, this conversion severely increases motion artifacts and reduces the high-quality image intended. EXTERNAL
• 2. SMPTE 292–2008 , “1.5 Gb/s Signal/Data Serial Interface,” www.smpte.org . EXTERNAL
• 3. SMPTE 424M-2006 , Television—3 Gb/s Signal/Data Serial Interface,” www.smpte.org . EXTERNAL
• 4. Some distances are slightly increased , whereas others are slightly decreased, compared to previously published charts. This is due to more accurate measurements and predictions of cable parameters and performance. EXTERNAL
• 5. At NAB two years ago , a major Canadian chip manufacturer demonstrated a prototype chip driving professional 1080i down 2000 ft of RG-6 (1694A) with a perfect eye pattern at the end. The formula result is 400 ft further emphasizing that these are safe distances and real-world applications could go much farther. If one wishes to go farther than the calculated distance, then those cables should be individually tested for bit errors or eye patterns. EXTERNAL
• 6. Many installers and system integrators can set up a specific run in which even these safe numbers do not apply. This is especially true if a cable can be tested for eye patterns. Between equipment, cable, connectors, patch panels, and a thousand other variables, it would also be easy to compromise the ideal performance of cable or any other component. The only way to know for sure is to rigorously and consistently test each cable after installation and determine just how much digital headroom is available in each one. EXTERNAL