Dahua NVS1604HF-A, User Manual

Page: 141 / 158

141

PTZ decoder and NVS 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
NVS 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 NVS 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 NVS. 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.

NVS 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 NVS network card is not good.
16. Burn error /USB back error.
There are following possibilities:

Burner and NVS are in the same data cable.