User`s guide

Triplex Digital Video Multiplexer
Appendices 65
APPENDIX E: TROUBLESHOOTING GUIDE
If the solutions to common problems presented here do not correct the problem
experienced with the multiplexer, refer to a qualified service person for assistance.
Monitor and Display
Symptom: Main monitor display is not clear or the OSD is jittering.
Reason: If the color burst separation circuit of the monitor is not good enough,
the high frequency component of video signal could interfere with
color signal, making jitter on the display.
Solution: 1. Use monitor with S-VHS input
2. Use monitor of better quality
Symptom: Main monitor image too bright.
Reason: “Brightness” value is too high in “Monitor Setup” menu.
Solution: Adjust the brightness to a lower value.
Reason 2: Camera iris is not adjusted properly.
Solution: Adjust camera iris to a smaller value.
Reason 3: Camera video output signal does not comply with the standard
(RS170/A).
Solution: Use a camera that outputs correct video.
Reason 4: Termination resistor is not enabled (OFF) (and loop back connector is
not used).
Solution: Enter setup menu and enable the termination resistor.
Reason 5: The multiplexer is broken.
Solution: Ask a qualified service person.
Symptom: Main monitor image too dark.
Reason 1: “Brightness” value is too low in “Monitor Setup” menu.
Solution: Adjust the Brightness to a higher value.
Reason 2: Camera iris is not adjusted properly.
Solution: Adjust camera iris to a larger value.
Reason 3: Camera cable is too long making video signal too attenuated.
Solution: Minimize cable length, or use video amplifier.