Keri Systems V-Track - Manual (Page 3)

V-Track™ Automatic Long Range Vehicle ID System
Installation Guide
Page 3 of 20 P/N: 01538-001 Rev. G
2.1.2 Vertical Plane
Vertical orientation is adjusted so as to aim the antenna at a spot about twenty feet (6.5 M) on the road from the Exciter.
From this spot forward, the detection area will increase as you get closer to the gate. This is shown in Figure 3.
Figure 3: The Vertical Antenna Coverage Pattern
2.1.3 External Arming Input
Some installations prefer that the V-Track not be active until a vehicle approaches. The V-Track system is built with an
input for external arming. This allows the use of road loops, IR detectors, pressure sensors, etc. to activate the V-Track
system Antenna/Exciter. This system is not active until the loop input wires (brown and blue on the Exciter) are shorted
together. This can be accomplished by using the arming devices output; either an open collector or the dry contacts of a
relay.
The blue wire is the high input and the brown wire is the low (ground). If there is no external arming device used, these
two wires must be connected together and this will turn the Antenna/Exciter on and allow it to function any time a
transponder is in range.
20 Feet
EX-10
Exciter
5 to 9
Feet
Optional Speed Bump
LRT-5
Transponder