Grass Valley LDK 7500 User Guide - Manual (Page 114)

4-20 HD video mode Viper
Tally Indicators
The red tally indicators light to indicate that the camera is recording.
LCP connector
The optional Local Control Panel (LCP) connects to this 12-pin
connector.
Auxilary Functions
1
2
DC out LCP CVBS VF
2
1