13W3 is a hybrid D-sub connector with 10 standard signal pins plus 3 coaxial contacts used for RGB video on Sun workstations, SGI machines, and some DEC equipment from the 1980s and 1990s.
| Pin | Name | Function | Type |
|---|---|---|---|
| A1 | RED | Red analog video 0.7V | ADC |
| A2 | GREEN | Green analog video 0.7V | ADC |
| A3 | BLUE | Blue analog video 0.7V | ADC |
| 1 | SERDAT | Sync on green or serial data | I/O |
| 2 | SENSE0 | Monitor sense bit 0 | I/O |
| 3 | COMPOSITE_SYNC | Composite sync | I/O |
| 4 | HSYNC | Horizontal sync | I/O |
| 5 | VSYNC | Vertical sync | I/O |
| 6 | GND | Ground | GND |
| 7 | SENSE1 | Monitor sense bit 1 | I/O |
| 8 | SENSE2 | Monitor sense bit 2 | I/O |
| 9 | GND | Ground | GND |
| 10 | GND | Ground | GND |