VDH-DRN374 Series Hardware Manual
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A : The possible causes:
1. PTZ error
2. Wrong settings, cabling and installation for the PTZ
3. Wrong wiring
4. Wrong PTZ settings in the DVR side
5. Protocols mismatch between PTZ and DVR
6. Mismatch between PTZ decoder and DVR ID address
7. When connected to several decoders, the farthest AB line of PTZ
decoder must add a 120 ohm resistor to eliminate reflection and
impedance matching, otherwise it will make PTZ unstable.
8. Distance beyond limitation
Q 12.
Motion detection not function
A : The possible causes:
1. Wrong schedule settings
2. Wrong area settings
3. Low sensitivity
4. Hardware limitation for different version
Q 13.
Fail to login by using client software or Web browsers
A : The possible causes:
1. Operating system is Win98 or Win Me and the client software can not
be installed or displayed normally; Upgrade the operating system to
Win2000sp4 or above, or use lower versions of the client software.
2. ActiveX control blocked; install the ActiveX control in the attached CD.
3. DX8.1 or above not installed; upgrade the display driver.
4. Networking error
5. Wrong Networking settings
6. Wrong user/password
7. Wrong client software for the DVR firmware
Q 14.
Mosaic or no video when Network preview and file playback
A : The possible causes:
1. Network traffic jam
2. Bandwidth limitation in the DVR side
3. Group mode is used in the DVR networking setting. More mosaics in
group mode, not recommended.
4. Masks or channel protection in DVR side
5. No rights for the user account
6. Bad DVR output
Q 15.
Networking not stable
A : The possible causes:
