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Possible reasons are as followed:
1
It is not an active tone arm.
2
It is not an active sound box.
3 The audio lines are damaged.
4 The hardware of the NVR is damaged.
There is audio signal in the surveillance window but mo audio signal in the playback
9、
state.
Possible reasons are as followed:
1
Setting issues: the audio option is not chosen.
2
The according channel is not connected with the video.
10、
The time is wrong.
Possible reasons are as followed:
1
Setting is wrong..
2
The battery is in bad connection or the voltage is too low.
3
The oscillation is damaged.
11、 The NVR can not control the PTZ.
Possible reasons are as followed:
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 NVR is not correct.
5 The protocols of the PTZ decoder and the NVR are not matched.
6 The address of the PTZ decoder and the NVR are not matched.
7 When multiple decoders are connected, the far port of the PTZ decoder line A(B) must
connect a 120
stable.
8
The distance is too far.
12、
The motion detect is not working,
Possible reasons are as followed:
1
The time range set is not correct.
resistance to reduce the reflection otherwise the PTZ control is not
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