Codan Radio Radio Repeater Systems Training Guide - Manual (Page 18)

TRAINING GUIDE | RADIO REPEATER SYSTEM
Chapter 2: Repeater System Confi gurations Page 10
A more effi cient use of the two frequencies would be a talk-around repeater (or 2T1R) as shown in Figure 2-2. This system
uses 2 channel positions on the mobiles, portables and base station equipment.
Figure 2-2: Talk-Around Repeater
Two advantages of this system are:
i) While two fi eld mobiles (or portables) are working (talking to) and monitoring (listening to) each
other on channel 2, an outside call (from the offi ce or mobile or another location) via the repeater
will still be received.
ii) The repeater is not operating (“on the air”) for all conversations thus reducing possibilities for
interference and battery drain at the repeater site.
Repeater
From other
locations
Portables Ch.1: Tx-F1 Rx-F2 Through repeater
Ch.2: Tx-F2 Rx-F2 Talk around
Rx-F1
Tx-F2
Portable
Ch.1 & 2
Portable
Ch.1 & 2