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 DVR is damaged.
9
、
There
There
There
There is
is
is
is audio
audio
audio
audio signal
signal
signal
signal in
in
in
in the
the
the
the surveillance
surveillance
surveillance
surveillance window
window
window
window but
but
but
but mo
mo
mo
mo audio
audio
audio
audio signal
signal
signal
signal in
in
in
in the
the
the
the playback
playback
playback
playback
state.
state.
state.
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
10
10
10
、
The
The
The
The time
time
time
time is
is
is
is wrong.
wrong.
wrong.
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
11
11
11
、
The
The
The
The DVR
DVR
DVR
DVR can
can
can
can not
not
not
not control
control
control
control the
the
the
the PTZ.
PTZ.
PTZ.
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 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 120
Ω
resistance to reduce the reflection otherwise the PTZ control is not
stable.
8
The distance is too far.
12
12
12
12
、
The
The
The
The motion
motion
motion
motion detect
detect
detect
detect is
is
is
is not
not
not
not working,
working,
working,
working,
Possible reasons are as followed:
1
The time range set is not correct.
