TransCore encompass 4, Manual

Page: 69 / 208

Encompass 4 Reader System Guide
TransCore Proprietary.
4-52
Note: Determine the read zone before you tighten all screws and straps permanently. Refer to the
section “Marking the Read Zone” on page 4-63.
After mounting the antenna, you must connect it to the Encompass 4 Reader. Follow the procedures
described previously in the section “Mounting the Antenna” on page 4-49 .
Caution
To avoid damage to the Encompass 4 Reader, you must connect the antenna before applying
power to the reader.
Note: The dimensions in Figure 42 are for demonstration purposes only and are approximations for
sites using the older ATA-type tags. Actual dimensions vary as lane geometry and tag style varies
from site to site. Adjust the antenna to match site and tag mounting positions to provide the most
direct line of sight to the tags.
Mounting the Antenna Overhead
Some site designs require that the antenna be mounted in an overhead location.
Procedures
To mount the antenna in an overhead location
1. Follow the manufacturer’s directions to attach the antenna assembly to the overhead location at
approximately 18 feet above the pavement surface.
2. Tighten slightly so that you can adjust the antenna up and down but not so slightly that there is a risk
of the antenna falling.
3. Adjust the assembly by pointing the antenna to the middle of the area where tags will be read, and
while in this position, tighten all screws and fastenings slightly.
For example, in toll lanes the Universal Toll Antenna (UTA) would be installed approximately 15 degrees
from the vertical.
Note: Adjust the antenna to provide the most direct line of sight to the tags.
Figure 43 illustrates an overhead-mounted antenna with approximate measurements for the read zone.
Note: Determine the read zone before you tighten all screws and straps permanently. Refer to the
section “Marking the Read Zone” on page 4-63.
After mounting the antenna, you must connect it to the Encompass 4 Reader. Follow the procedures
described previously in the section “Connect the Reader and Antenna” on page 4-36 .