Codan-radio Radio Repeater Systems Training Guide Bedienungsanleitung PDF herunterladen (Seite 17)

RADIO REPEATER SYSTEM | TRAINING GUIDE

Chapter 2: Repeater System Conﬁ gurations Page 9

CHAPTER 2: REPEATER SYSTEM CONFIGURATIONS

DETERMINING CONFIGURATION

Radio system conﬁ guration is dependant on the frequencies available, location of repeater sites and

the end user’s operating requirements. Two frequencies are required for a single repeater system.

These frequencies are designated as F1 and F2. The separation between these two frequencies

determines the size of the duplexer used in the repeater.

Figure 2-1: Two Frequency Repeater

The repeater in Figure 2-1 shows an inefﬁ cient use of frequencies and would exhibit some unwanted

characteristics. For example, if the repeater went “off the air” users would not be able to communicate

with each other since all units are transmitting on one frequency and receiving on another frequency.

Portable

Repeater

Office

Tx-F1

Rx-F2

Tx-F1

Rx-F2

Rx-F1

Tx-F2

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Codan-radio Radio Repeater Systems Training Guide Bedienungsanleitung Seite 17