User`s manual

User’s Manual
146 Appendices
Symptom: The main monitor image is too dark.
Reason 1: The “Brightness” value is too low in “Monitor Setup” menu.
Solution: Adjust the Brightness to a higher value.
Reason 2: The camera iris is not adjusted properly.
Solution: Adjust camera iris to a larger value.
Reason 3: The camera cable is too long, which is weakening the video signal.
Solution: Minimize cable length, or use video amplifier.
Reason 4: The looping connector is in use, but the termination resistor is
enabled (ON).
Solution: Enter the Camera menu and disable the termination resistor (see
Configuration Table on page 44 for the termination resistor setting for a
camera channel).
Reason 4: The DigiMux is broken.
Solution: Contact a qualified service person.
Symptom: Some cameras cannot be displayed on the Main monitor.
Reason: The camera is malfunctioning or a cable is open or shorted.
Solution: Repair the camera and/or cable.
Reason: The DigiMux suffered an abnormal spike or shock, which damaged
some channels.
Solution: Use a good camera to test each channel. If some channels do not
function, return the unit to the dealer for repair.
Symptom: In multi-window display format, some windows interfere with other windows.
Reason: The video signal from one of the cameras does not comply with the
standard (RS170/A), and/or the vertical sync amplitude is too small.
Solution: Disconnect all cameras, one by one, until the failed camera is found.
Replace the failed camera.