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Difference/Threshold
5. Click Apply
4.7.8 Buzzer
Configure the alarm duration of the buzzer on the NVR.
1. Go to Menu > Alarm > Buzzer
2. Set the alarm duration. The default is 30s.
• Maximum: When enabled, you cannot set the alarm duration. When an alarm occurs, the
buzzer will alarm continuously until the alarm ends.
• Custom: When enabled, you can set how long the buzzer will alarm after it is triggered. The
valid range is from 1 to 600(s). When an alarm occurs, the buzzer will alarm continuously within
the alarm duration, and stop automatically if the alarm ends first within the duration.
Note: To stop a buzzer alarm manually, right-click in the preview window, select Manual > Buzzer. See
Buzzer
for details.
3. Click Apply.
Drag the slider to adjust the difference and threshold.
• The difference between two sound volumes. An alarm occurs
when the rise or fall of volume exceeds the difference (range: 0-
400). This item is applicable when the detection type is Sudden
Rise, Sudden Fall, or Sudden Change.
• Threshold: The limit value of volume. An alarm occurs when
the detected volume exceeds the set value (range: 0-400). This
item is applicable when the detection type is Threshold.
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UNIGUARD 4 & 8 HDD Series
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