DVR systems NVR38xx Series - Manual (Page 122)

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 PTZ decoder and device address is not compatible.
 When there are several decoders, please add 120 Ohm between the PTZ decoder A/B
cables furthest end to delete the reverberation or impedance matching. Otherwise the
PTZ control is not stable.
 The distance is too far.
12. Motion detection function does not work.
There are following possibilities:
 Period setup is not correct.
 Motion detection zone setup is not correct.
 Sensitivity is too low.
 For some versions, there is hardware limit.
13. Can not log in client-end or web.
There are following possibilities:
 For Windows 98 or Windows ME user, please update your system to Windows 2000 sp4.
Or you can install client-end software of lower version. Please note right now, our device
is not compatible with Windows VISTA control.
 ActiveX control has been disabled.
 No dx8.1 or higher. Please upgrade display card driver.
 Network connection error.
 Network setup error.
 Password or user name is invalid.
 Client-end is not compatible with device program.
14. There is only mosaic no video when preview or playback video file remotely.
There are following possibilities:
 Network fluency is not good.
 Client-end resources are limit.
 There is multiple-cast group setup in device. This mode can result in mosaic. Usually we
do not recommend this mode.
 There is privacy mask or channel protection setup.
 Current user has no right to monitor.
 Device 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 device network card is not good.
16. Burn error /USB back error.
There are following possibilities:
 Burner and device are in the same data cable.