Attenti DEU 500 User Manual

USER MANUAL

(Data Extending Unit)

User Manual

December 99

DEU

Table of Contents

Introduction................................................................................4

Physical Appearance................................................................. 5

Recommendations for optimum performance......................... 6

Extra coverage........................................................................... 7

Mounting two DEU s................................................................ 8

Mounting Surfaces ....................................................................9

Mounting Procedure..................................................................9

FCC Notice...........................................................................................11

1. Introduction

The DEU (Data Extending Unit) is a versatile combination of both a transmitter and receiver that is
designed to extend the range of the GMU (Group Monitoring Unit). The DEU’s unique design assists
in eliminating blind spots (areas where the GMU cannot receive a transmission) between the Tx
(transmitter) and the GMU.

The DEU’s effectiveness is its ability to receive weak transmissions that would not otherwise reach
the GMU because of poor site locations e.g. toilets, pillars, industrial noise etc, and boost these signals
onwards to the GMU. This feat therefore extends the transmission range between the GMU and the Tx
and maintains successful communication flow from Tx to GMU. The DEU acts as the bridge between
the Tx and the GMU.

The DEU receives transmissions from any Tx or another DEU (in the case where more than one DEU
is used) and transmits the received signal onwards, which in turn can be received by other DEU’s or
the GMU itself. This maintains that a transmission will successfully reach its destination, the GMU.

The DEU’s internal intelligence prevents two DEU’s from receiving and transmitting between one
another so entering into a loop. This maintains that the true transmission will be received by the GMU.