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• There is multiple-cast group setup in DVR. This mode can result in
a mosaic appearance. Usually we do not recommend this mode.
• There is privacy mask or channel protection setup.
• Current user has no right to monitor.
• DVR local video output quality is not good.
15. Network connection is not stable.
There are following possibilities:
• Network is not stable.
• IP address conflict.
• MAC address conflict.
• PC or DVR network card is not good.
16. Burn error /USB back error.
There are the following possibilities:
• Burner and DVR are in the same data cable.
• System uses too many CPU resources. Please stop recording first
and then begin backup.
• Data amount exceeds backup device capacity. It may result in
burner error.
• Backup device is not compatible.
• Backup device is damaged.
17. Keyboard cannot control DVR.
There are the following possibilities:
• DVR serial port setup is incorrect.
• Address is incorrect.
• When there are several switchers, power supply is not enough.
• Transmission distance is too far.
18. Alarm signal cannot been disarmed.