Chapter 10: Camera setup 
TruVision NVR 11 User Manual  79 
Camera tamper 
You can setup the recorder to alert you when the camera view has changed such as 
when someone has deliberately blocked the camera view by spraying paint on the lens 
or by moving the camera. Tampering detection only applies when the whole image is 
covered and all light is blocked. You can select a specific area of the camera screen to 
detect tampering. 
Note: It is strongly recommended not to configure for video tampering when using PTZ 
dome cameras. 
To set up video tampering detection: 
1.  From the menu toolbar, click Camera Setup > Camera Tamper. 
2.  Select a camera to configure for video loss detection. 
3.  Select the Enable Camera Tamper checkbox to enable the feature. 
4.  Select the tamper detection sensitivity level by clicking the sensitivity scroll bar. The 
maximum sensitivity value is 3. 
5.  Set up the tamper detection area. 
Using the mouse, click and drag a privacy-mask box in the camera view window 
over the desired area. You can set up one area. Click Clear to delete the area. Click 
Apply to save settings. 
6.  Select the arming schedule for the tamper.  
Click Actions and then select the Arming Schedule tab to select the day of the 
week and the time periods during the day when motion can be recorded. You can 
schedule up to eight time periods in a day. Default is 24 hours. 
Click Apply to save the settings. Click Copy to copy the settings to other days of 
the week and holiday period. 
Note: The time periods defined cannot overlap. 
7.  Select the response method. 
Click Actions and then select the Actions tab to select the method by which you 
want the recorder to notify you of the alarm: Full-screen monitoring, Enable alarm 
audio, Notify alarm host, Send email, and Trigger alarm output. See page 105 for 
the description of alarm notification types. 
Click Apply to save settings and then OK to return to the main window. 
8.  Click Exit to return to live view. 
Restricted access camera 
Restricted access cameras are cameras that are only visible to specific users.