Specifications

36 Pelco Manual C1920M-D (4/03)
The activity mask selects what portion of the camera’s field of view the multiplexer monitors
for activity. The entire grid is active on default.
To program an activity mask for a camera:
1. Press the desired CAMERA button for approximately three seconds until the Camera
menu appears. Type the password if requested. The currently selected menu item
blinks.
2. Use the arrow buttons to highlight SET DETECTION MASK.
3. Press the +/- button. The Activity Mask appears. The currently selected menu item or
activity box blinks.
4. Use the arrow buttons to move between menu items and activity boxes on the screen.
5. Highlight the sensitivity menu item. Press the +/- button to select the sensitivity. The
higher the sensitivity, the less motion needed to detect activity.
6. Turn activity boxes on or off.
To turn on all activity boxes, use the arrow buttons to choose SET ALL. Press the +/-
button. All boxes will contain a symbol as shown in Figure 26. The multiplexer will
monitor motion in those boxes.
To turn off all activity boxes, use the arrow keys to choose CLEAR ALL. Press the +/-
button. All boxes will be blank.
To turn on or off an individual box, use the arrow keys to select the box. Press the +/-
button to toggle a box on or off.
Turn off activity boxes where you want motion ignored (such as blowing trees,
highways, computer monitors, fluorescent lighting, and non-problem areas). An
example of a non-problem area would be a camera focused on a bank vault entrance
but ignoring tellers working nearby.
7. To test activity detection, highlight TEST and press the +/- button.
Create motion in front of the camera. Small black and white dashes will appear where
motion is detected.
To exit test mode, press the +/- key to return to the mask.
8. If you did not like what you saw in test mode, change the mask and test activity
detection again.
9. When you finish defining the activity mask, go to EXIT. Press the +/- button to exit
programming mode.
10. If necessary, repeat steps 1-9 to program the activity mask for other cameras.