User's Manual

Table Of Contents

28 MDS iNet 900 Installation Guide MDS 05-2873A01, Rev. A

DRAFT 6—8/29/01

8.0 REPEATER ASSITED LANS

Repeater Systems

A repeater works by re-transmitting data from the outlying remote site

to the Access Point station and vice-versa. It introduces a small amount

of end-to-end transmission delay, but this is not a problem in most sys-

tems.

The geographic location of a repeater station is especially important. A

site must be chosen that allows good communication with both the

Access Point and the outlying remote site. This is often on top of a hill,

or other elevated terrain from which both sites can be “seen” by the

repeater station antennas. A detailed discussion on the effects of terrain

is given in Section 3.2, Site Selection (beginning on page 6).

The following paragraphs contain specific requirements for repeater

systems.

Option 1—Traditional with two-radio repeater

Although the range between iNet LANS is up to 50 miles over average

terrain, it is possible to extend the range considerably by connecting two

units together at one site in a “back-to-back” fashion to form a repeater,

as shown in Figure 16.

Invisible place holder

Figure 16. Typical LAN with dual-transceiver repeater

For more detailed information on this configuration, see “TRADI-

TIONAL REPEATER CONFIGURATION WITH TWO RADIOS” on

page 20

1. What are the advantages and/or limitations of each of these two repeater con-

figurations?

iNet S.A.

iNet A.P.

iNet S.A.

RTU

HOST

COMPUTER

RTU

REPEATER

LINK

Cross-Over

Cable

POINT-TO-POINT LINK