User's Manual

Walgreens Installation Guide
G-1-2002-2B
Walgreens Installation Guide 2B.doc
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5/27/2008 Page: A-4
Antenna Placement:
Description of Hardware
The transmitter (Tx/ATA) is the backbone of our in-store infrastructure. The Tx/ATA
transmits a radio signal in circular polarity downward. In other words, imagine a cone of
radio waves coming down from the Tx/ATA to the floor. The signal then proceeds to reflect
around the environment in random patterns based on the contents of that environment.
Water and metal, for example, are main affecting factors for radio waves.
The receiver (Rx/ARA) is the slave to the Tx/ATA; without the Tx/ATA, the Rx/ARA would
be useless. The Rx/ARA receives radio signals in circular polarity, just opposite of a
Tx/ATA. The Rx/ARA receives signals from the floor upward, although radio waves can
come in from all directions. It has the same environmental limitations as the Tx/ATA.
Both types of antennae must have a clear line-of-sight from the center of the
antenna directly to the floor. They cannot, and must not, be placed over metal
fixtures or liquids for any reason. An Rx/ARA can be installed over a display table,
but a Tx/ATA can never be installed over a display table.
A quick reference table that assumes that the installer is familiar with the terms in the
glossary has been included. A more detailed installation description for each antenna
follows the table.
Please note that all named antennae are installed in the exact same locations relative to
the fixtures or aisles described. For example Tx-1 will always be installed in the front of the
store by the cosmetics wall. The cosmetics wall may be on the right or left side of the store
depending on where the entrance to the store is located. We have provided examples
where RX-1, 2, 3 and 4 are installed along the front of the store in the left door
configuration and where the RX-4, 13, 3, 2, and 1 are installed along the front of the store
in the right door configuration to illustrate these configurations. To clarify this a little more
Rx-1 will be located closest to the door in most store settings while Rx-4 is located to the
opposite side of the store near photo.
Left Door, 9 Aisle Right Door, 10 Aisle
Cosmetics
Wall
Cosmetics
Wall
Photo
Photo