VDH-DXB Hardware Operation Manual
11
Q 5.
Live video problems: Such as bad colors, brightness error, image blink
…
A : The possible causes:
1. When using BNC as output, wrong NTSC/PAL matching will result in
B/W image.
2. Impedance mismatch between digital video recorder and monitor.
3. Video transmission distance is too far or video transmission line
attenuation is too much
4. Wrong settings of colors, brightness in the DVR
Q 6.
No recorded file in local side
A : The possible causes:
1. Wrong data cable or jumper error in the harddisk
2. Hard Disk error
3. Upgraded firmware can not recognize the existing file system
4. Desired files are overwritten
5. Recording not enabled
Q 7.
Bad image when playback
A : The possible causes:
1. Low recording quality
2. Data error when reading; small bit-rate; fuzzy when playback; Restart
can be better.
3. Wrong data cable or jumper error in the harddisk
4. Hard Disk error
5. DVR hardware error
Q 8.
No audio sound
A : The possible causes:
1. Not powered-microphone
2. Not powered-speaker
3. Audio cable error
4. DVR hardware error
Q 9.
Live video with audio, but no sound when playback
A : The possible causes:
1. Wrong setting: audio not enabled
2. No video to the paired channels; when the screen is blue, playback will
not be continuous.
