SDI is the acronym for Serial Digital Interconnect.
HD-SDI is the High Definition version
Typically, HD-SDI is normally transmitted over digital video grade RG6-style low-loss coaxial cable up to a nominal maximum distance of about 100 meters.
Many variables will Change this nominal distance. The quality of the cable is extremely important. Another factor that affects the distance is dependent on the peripherals and the quality of the interface. More importantly the bitrate used of the HD-SDI and weather the signal is compressed or not compressed.
|
SMPTE 259 |
SMPTE 292 | |||||||||
|
Level A |
Level B | Level C | Level D |
|
||||||
| NTSC 4fsc | PAL 4fsc | 525/625 |
525/625 |
HDTV | ||||||
| Application |
Composite |
Component | Componenet |
Componenet |
||||||
|
Data Rate in Mbps 9clock) |
143 | 177 | 270 | 360 | 1485 | |||||
| 1/2 Clock Rate in MHz | 72 | 89 | 135 | 180 | 743 | |||||
| Cable Type | Feet | Meters | Feet | Meters | Feet | Meters | Feet | Meters | Feet | Meters |
| RG59, 26 AWG | 583 | 178 | 531 | 162 | 428 | 130 | 365 | 111 | 94 | 29 |
| RG59, 24 AWG | 813 | 248 | 736 | 224 | 600 | 183 | 519 | 158 | 150 | 46 |
| RG59, 20 AWG | 1034 | 315 | 944 | 288 | 801 | 244 | 687 | 209 | 188 | 57 |
| RG6, 18 AWG | 1406 | 429 | 1274 | 388 | 1067 | 325 | 915 | 279 | 285 |
87 |