TechVision DVR-LT04120 User Manual page 134

 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. System is compatible
with WIN VISTA web control right now. But you need to disable user account control
function. Double click user account and then disable user account control. After
completing setup, please reboot the PC.
 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 DVR 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 DVR. 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.
 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.
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