Senstar Corporation 24000 User Manual
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Sensitivity jumper
The position of the Sensitivity Jumper is determined by the application requirements:
•
L = Low Security
•
M = Medium Security
•
H = High Security
(See page 2-1 for definitions of these terms.)
This jumper effectively reduces the maximum alarm sensitivity, preventing excessive sensitivity that may result in
nuisance alarms.
nuisance alarms.
Antenna pattern
The detection pattern is adjustable by use of the sensitivity adjustment, and by changing the configuration of the
transmitting and receiving antennas. The antenna configuration is changed by installing RF absorbent pads over
selected antenna elements (see Figure 4-1). When no antenna pads are installed, the microwave beam is narrowest
(11º). With eight of the elements covered, the beam is 16º, and with sixteen of the elements covered, the pattern is
24º. In general, the wide pattern should only be used when the separation distance between receiver and
transmitter is 15 m (50 ft.) or less. The medium range pattern should be used (if necessary) with separation
distances of between 15 m (50 ft.) and 30.5 m (100 ft.). The narrowest pattern (unmodified antenna) must be used
when the separation distance is greater than 30.5 m (100 ft.).
transmitting and receiving antennas. The antenna configuration is changed by installing RF absorbent pads over
selected antenna elements (see Figure 4-1). When no antenna pads are installed, the microwave beam is narrowest
(11º). With eight of the elements covered, the beam is 16º, and with sixteen of the elements covered, the pattern is
24º. In general, the wide pattern should only be used when the separation distance between receiver and
transmitter is 15 m (50 ft.) or less. The medium range pattern should be used (if necessary) with separation
distances of between 15 m (50 ft.) and 30.5 m (100 ft.). The narrowest pattern (unmodified antenna) must be used
when the separation distance is greater than 30.5 m (100 ft.).
NOTE: Always use the narrowest beam possible, commensurate with detection
requirements.
Install the absorbent pads on both the receiver and transmitter pair in accordance with the following instructions:
1. Select the number of strips of double-backed tape that will cover the elements necessary to provide the desired
detection pattern. Remove the paper backing, and stick the tape over the elements to be covered.
Note: Cover only the elements shown in the illustration (Figure 4-1).
2. Remove the other piece of paper backing from the tape, and firmly press the RF absorbent material to it.
3. Ensure that both the transmitting antenna and the receiving antenna configurations are identical.