Digital Video Recorder User Manual
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7. There is audio signal in the surveillance window but mo audio signal in the playback state.
Possible reasons are as follows:
(1)Setting issues: the audio option is not chosen.
(2)The according channel is not connected with the video.
8. The time is wrong
Possible reasons are as follows:
(1)Setting is wrong.
(2)The battery is in bad connection or the voltage is too low.
(3)The oscillation is damaged.
9. The DVR cannot control the PTZ.
Possible reasons are as follows:
(1)There is something wrong with the frontal PTZ.
(2)The setting, connection or the installation of the PTZ decoder is not correct.
(3)The connections are not correct.
(4)The PTZ setting of the DVR is not correct.
(5)The protocols of the PTZ decoder and the DVR are not matched.
(6)The address of the PTZ decoder and the DVR are not matched.
(7)When multiple decoders are connected, the far port of the PTZ decoder line A (B) must connect a
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resistance to reduce the reflection otherwise the PTZ control is not stable.
(8)The distance is too far.
10. The motion detect is not working
Possible reasons are as follows:
(1)The time range set is not correct.
(2)The motion detect area set is not correct.
(3)The sensitivity is too low.
(4)Limited by some hardware edition.
11 I cannot login via web.
Possible reasons are as follows:
(1)The system is windows 98 or windows me. We recommend updating to windows 2000sp4 or higher
edition or installing the software for low edition.
(2)ActiveX is hold back.
(3)The edition is not exceeded dx8.1. Update the display card driver.
(4)Network connection failure.
(5)Network setting issues.
(6)Invalid password or user name.
(7)The user edition is not matched the DVR program edition.
12 The image is not clear or there is no image in network preview state or video file playback state.
Possible reasons are as follows:
(1)Network is not stable.
(2)The user machine is resource limited.
(3Choose the play-in-team mode in the network setup of DVR.
(4)The region shelter or channel protection is set.
(5)The user has no surveillance purview.
(6)The real-time image of the hard disk recording machine itself is not clear.
13 Network connection is not stable.
Possible reasons are as follows:
