DX4100 Series Main BNC Output video display is blank or scrambled?
Pelco Video Management
Dip switch setting.
For the Main BNC Output to function, ensure the Rear-Panel Dip-Switch is set to TV.
1. Locate the S/W (switch) on the rear of the DX4104. See figure 1, #14 for the S/W switch.
2. Set the switch to the up position (TV). The position enables main monitor output to the main out BNC connector.
3. Reset power to the unit.