Chapter 2 – Testing
Page 24 of 30 9450 Duolink Exit Alarm Receiver Hardware Installation Guide
0510-1103-G
To tune and test the DuoLink:
1. Perform the Antenna Survey (**9450 13 1)
2. Remove the plug covering the Gain Control
3. Using the door antenna screwdriver (0500-0097), turn the Gain
Control clockwise until the signal LED on the DuoLink begins to blinks
4. Once the LED begins to blink, turn the Gain Control back, counter-
clockwise one full turn (back 360°)
WARNING: Some door receiver locations are relatively free of the typical
RF noise levels that are found at normal mounting locations in facilities.
For these locations, adjusting the door receiver gain control with the
standard tuning procedure (see step 6 above) can result in too much gain.
Excessive sensitivity to thunderstorm lightning RF noise, excessive
coverage into undesired areas, and over-sensitivity to random occurring
RF noise events (such as floor-buffer/polisher, RFI, and false auto-enrolls)
can be reduced or eliminated by testing the door receiver setup with a test
tag transmitter to confirm that the door receiver has 100% of the needed
coverage and not more. If coverage is tested and found to be excessively
higher than needed, reduce the door receiver gain control counter-
clockwise until there is 100% coverage at that location and not more.
5. Confirm the range and coverage using the DuoLink and a transmitter
to ensure the area is covered properly while at the same time not
covering more than what is needed. To do this, place the exit
controller into Test Mode (** 9450 88 1) and perform the following
within 5 minutes, after which point the exit controller will automatically
exit Test Mode
Approach the DuoLink with a test transmitter at a slow walking
pace (approximately 4 feet per second)
Verify that the DuoLink begins blinking when the transmitter is
within 4 feet
Verify that the exit controller successfully decodes the transmitter
(indicated by a blink of its red LED) before the transmitter
reaches the doorway
6. If the above tests fail, the Gain Control must be turned an additional
1/8 turn clockwise, then repeat Step 5
7. Repeat these procedures for each additional DuoLink
8. With all DuoLinks tuned and connected to the exit controller, open the
monitored door(s) or alternatively open the Door In input on the exit
controller
9. Attempt to egress the covered area from different directions at a fast
walking pace (approximately 5-6 feet per second) and verify that the
exit controller issues an alarms for every attempt
10. If the above test fails, Steps 3-6 will need to be repeated on all
DuoLinks
11. Once the DuoLinks have been tuned and have passed testing,
replace the Gain Control plug on each one
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