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TROUBLESHOOTING QC40198 User Manual
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12. Combo DVR cannot control PTZ.
Possible causes:
Front panel PTZ error
PTZ decoder setup, connection or installation is not correct.
Cable connection is not correct.
PTZ setup is not correct.
PTZ decoder and combo DVR protocol and/or address do not match.
When there are several decoders, please add 120 Ohm between the PTZ decoder A/B cables
furthest end to deter reverberation or impedance matching. Otherwise the PTZ control is not stable.
The PTZ camera is too far from the DVR.
13. Motion detection function does not work.
Possible causes:
Period setup is not correct.
Motion detection zone setup is not correct.
Sensitivity is too low.
14. Cannot log in client-end or web.
Possible causes:
For Windows 98 or Windows ME user, please update your system to Windows 2000 sp4 or later. Or
you can install client-end software of lower version.
ActiveX control has not been enabled.
Video card driver on computer may need to be upgraded.
Network connection error.
Network setup error.
Password or user name is invalid.
15. There is only mosaic no video when previewing or playing back video file remotely.
Possible causes:
Network bandwidth is not sufficient.
Computer does not have enough resources to handle video flow.
There is multiple-cast group setup in combo DVR. This mode can result in mosaic. Usually we do
not recommend this mode.
There is privacy mask or channel protection setup.
Current user does not have monitoring rights.
Combo DVR local video output quality is not good.
16. Network connection is not stable.
Possible causes:
Network is not stable.
IP address conflict.
MAC address conflict.
PC or combo DVR network card is not good.