77
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enabled. Click Record icon under Setup to find out.
•
The corresponding channel is not connected with video (no camera
attached). When the image appear blue screen the playback will be
intermittent
the time display is wrong.
Possible reasons:
•
The time setting is wrong. Day light saving time has not been set up
properly.
•
The battery is in bad connection or the voltage is too low.
DVr cannot control the ptZ.
Possible reasons:
•
Something wrong with the front-end PTZ.
•
The baud rate, address, protocol settings of the front-end PTZ and device
PTZ are inconsistent.
•
RS485 cable is connected incorrectly.
•
When multiple decoders are connected, the far end of AB cable of the
PTZ decoder must add a 120 OU resistance to remove reflection and
impedance matching, otherwise it will make the PTZ control unstable.
the motion detection is not working
Possible reasons:
•
The time period setting is not correct.
•
The motion detection area setting is not appropriate.
•
The sensitivity is too low.
no image or having mosaic effect when preview network image
or playback video files
Possible reasons:
•
Network speed is inconsistent or too slow.
•
The logged in user has no surveillance authority.
•
The device has no video output. Camera disconnected.
something wrong with the usB backup.
Possible reasons:
•
The CPU is busy please stop recording and then go on backup.
