Codan-radio Radio Repeater Systems Training Guide Uživatelský manuál stáhnout pdf (Strana 20)

TRAINING GUIDE | RADIO REPEATER SYSTEM

Chapter 2: Repeater System Conﬁ gurationsPage 12

Figure 2-4 represents a Y conﬁ guration. Star and Y conﬁ gurations use repeating links as the center

site. Note that the drop repeater frequencies at (A) and (D) are the same. As the system expands,

three pairs of drop frequencies are usually adequate for re-use. Terrain will often provide enough

separation between mobiles using the repeaters so that interference between them is not an issue.

The strongest signal will normally be captured by the closest repeater. Note also that the antenna on

the repeating link at (C) will probably have to be multi-directional.

Figure 2-4: Y Linked Conﬁ guration System

To / From Mobiles and

Base Stations

To / From Mobiles and

Base Stations

Drop

Repeater

Switched link

Repeater

Tx-F1

Rx-F2

Tx-F3

Rx-F4

Drop

Repeater

Switched link

Repeater

Tx-F3

Rx-F4

Tx-F5

Rx-F6

Repeating

link Repeater

Drop

Repeater

Tx-F4

Rx-F3

Tx-F7

Rx-F8

Drop

Repeater

Switched link

Repeater

Tx-F1

Rx-F2

Tx-F3

Rx-F4

(A) (B)

(C)

(D)

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Codan-radio Radio Repeater Systems Training Guide Uživatelský manuál Strana 20

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