Audio Alarm - Bosch MIC IP ultra 7100i User Manual

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en | Alarm

Tamper detection

Detect tampering of cameras and video cables by means of various options. Run a series of

tests at different times of the day and night to ensure that the video sensor is operating as

intended.

Sensitivity and Trigger delay [s] can only be changed if Reference check is selected.

Reference check

Save a reference image that can be continuously compared with the current video image. If

the current video image in the marked areas differs from the reference image, an alarm is

triggered. This detects tampering that would otherwise not be detected, for example, if the

camera is turned.

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Trigger delay [s]

Set delayed alarm triggering here. The alarm is only triggered after a set time interval in

seconds has elapsed and then only if the triggering condition still exists. If the original

condition has been restored before this time interval elapses, the alarm is not triggered. This

avoids false alarms triggered by short-term changes, for example, cleaning activities in the

direct field of vision of the camera.

Global change

You can set how large the global change in the video image must be for an alarm to be

triggered. This setting is independent of the sensor fields selected under Select Area. Set a

high value if fewer sensor fields need to change to trigger an alarm. With a low value, it is

necessary for changes to occur simultaneously in a large number of sensor fields to trigger an

alarm.

This option allows you to detect, independently of motion alarms, manipulation of the

orientation or location of a camera resulting from turning the camera mount bracket, for

instance.

Global change

Activate this function if the global change, as set with the Global change slide control, should

trigger an alarm.

7.3

The camera can create alarms on the basis of audio signals. You can configure signal strengths

and frequency ranges in such a way that false alarms, for example due to machine noise or

background noise, are avoided.

Notice!

i

First set up normal audio transmission before you configure the audio alarm here (see Audio).

Audio alarm

Select On if you want the device to generate audio alarms.

2020-11 | 1.4 |

Click Reference to save the currently visible video image as a reference.

Click Add mask and select the areas in the reference image that are to be ignored. Click

Set to apply.

Check the box Reference check to activate the on-going check. The stored reference

image is displayed in black and white below the current video image.

Select the Disappearing edges or Appearing edges option to specify the reference check

once again.

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