DB25 connectors are used on professional video routing equipment to carry multiple composite video signals. Each signal pair uses one pin for video and a shared ground, with 12 video channels typical per connector.
| Pin | Name | Function | Type |
|---|---|---|---|
| 1 | CH1 | Video channel 1 signal | ADC |
| 2 | CH2 | Video channel 2 signal | ADC |
| 3 | CH3 | Video channel 3 signal | ADC |
| 4 | CH4 | Video channel 4 signal | ADC |
| 5 | CH5 | Video channel 5 signal | ADC |
| 6 | CH6 | Video channel 6 signal | ADC |
| 7 | CH7 | Video channel 7 signal | ADC |
| 8 | CH8 | Video channel 8 signal | ADC |
| 14 | GND | Ground | GND |
| 15 | GND | Ground | GND |
| 16 | GND | Ground | GND |
| 17 | GND | Ground | GND |