Keri Systems V-Track - Manual (Page 9)

V-Track™ Automatic Long Range Vehicle ID System
Installation Guide
Page 9 of 20 P/N: 01538-001 Rev. G
4.1 Receiver Sensitivity Adjustment
For installations of a single Receiver, it is typically fine to leave the sensitivity control at maximum (the factory default
setting).
Installations that have access points 500 feet or less apart require Receiver sensitivity adjustment. Receivers are designed
to be sensitive, long range devices to offer the best possible operation. As a result, if you have access points in reasonably
close proximity the Transponder signal may be received by more than one Receiver. This results in incorrect system
operation and must not be allowed to happen.
If your site has access points in close proximity, following the System Setup and Checkout procedure Keri recommends
the following:
1. Remove the Receiver cover. There two LEDs, one Red and one Green (see Figure 6 on page 7). The Green LED
blinks off when a Transponder is in range and the Red LED blinks off when a proper code is detected and data is
shipped to the host controller.
2. Place your Transponder in the field of Access Point A. Make certain that the LED on the Transponder is blinking
indicating proper operation. Now, look at any nearby Receiver other than that of Access Point A. If its Red LED is
blinking, the sensitivity of that Receiver must be reduced by turning the control in a counter clockwise direction.
Reduce this setting until the Red LED no longer blinks, then turn an additional 1-2 degrees for a safety margin.
3. This procedure needs to be repeated at all Receivers, until all Access Points have been tested. Of course this means
that the Test Transponder will need to be placed at the antenna of each gate and all nearby Receivers checked for
proper sensitivity settings.
4. When this is completed, test to make sure the Transponder is still seen on the desired Receiver. If it is not possible to
reduce unwanted Transponder reads without degrading the desired signals, then the Receivers will need to placed
further apart.
With multiple gates, this task will take a few minutes per Access Point, but is well worth the time spent as it eliminates the
possibility of a vehicle opening an Access Point other than the one it is entering.
4.2 Transponder Enrolling
The V-Track Transponders you receive should be in consecutive ID numbers with no breaks or missing numbers. Keri
recommends enrolling these Transponders using the block enrollment feature provided by the Keri software (enrolling all
consecutively numbered Transponders into the cardholder database at one time by number range). If you are intending to
use learn enrollment (presenting Transponders to a reader one-at-a-time) please contact Keri Technical Support for
information.