Bar Antenna System Installation
68
750.001.003
Revised June 1999
© 1999 AXCESS
TM
Inc.
Required Materials
IMPORTANT!
The following materials should be on hand for the
installation of the Bar Antenna:
•
RG-58/U coaxial cable with 50 ohm impedance (nominal), solid
copper center conductor, 55% tinned copper braid or better,
100% foil shield coverage (for example, Belden 9310) of
sufficient length to reach the ATU. The maximum recommended
cable length is 20 feet.
•
2 three-piece crimp type male BNC connectors – see page 85 for
installing BNC connectors
•
Three-blade rotary coaxial cable stripper
•
Phillips and flathead screwdrivers
•
Step ladder for positioning the Bar Antenna above the door or
ceiling.
Prerequisite Tasks
The following tasks should be completed:
The
ATU has been installed
. If not, refer to the appropriate
section in this document and install the ATU before continuing
with the Bar Antenna installation.
The
Reader has been installed
. If not, refer to the appropriate
section in this document and install the Reader before continuing
with the Bar Antenna installation.
IMPORTANT!
Before permanently installing the Bar Antenna, lay out
and test the entire NT132 system.
Installation Considerations
Determine the
approximate
installation site of the Bar Antenna and of
any third-party gate controller if one is being used. Use the following
guidelines:
•
The ATU should be located no more than 20 feet (cable length)
from the antenna. A good location is directly above the doorway
where the Bar Antenna is to be installed – above the ceiling tiles
if desired, but accessible for tuning (Figure 29)
•
The Bar Antenna should be located at least 4 inches from any
metal.