Dv Mode Programming; About The D-Star System - Icom IC-80AD Instruction Manual

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DV MODE PROGRAMMING

About the D-STAR system

In the D-STAR (Digital Smart Technologies for Amateur
Radio) system, repeater linking via a 10 GHz backbone and/
or internet gateway provides you with much wider coverage
range during digital voice mode operation.
• D-STAR system outline
Repeater A
Area
440 MHz
Station A
Repeater C
440 MHz
Station C
34
10 GHz
Repeater B
Zone
440 MHz
Station B
Internet Internet
network network
10 GHz
Repeater D
440 MHz
Zone
Station D
In traditional repeater operation, stations that are communi-
cating must both be in the repeater's operating area. However,
D-STAR repeaters can be linked via a 10 GHz backbone, as
shown in the illustration at left. Using D-STAR, stations A and
B can communicate even though they are in widely separated
repeater operating areas.
Furthermore, D-STAR repeaters can be linkled through an
internet gateway, which can extend the communication range
dramatically. For example, when station B uses the internet
gateway connection, it can communicate with station C even
though they are thousands of miles apart! By using the gate-
way connection, long distance communication is possible
using 144 or 440 MHz digital voice!
In the D-STAR system, an independent repeater's operating
area is called an Area and a group that of linked repeaters
via a 10 GHz backbone is called a Zone.
About time-out timer function
The IC-80AD has a time-out timer function for digital re-
peater operation. The timer limits a continuous transmis-
sion to approx. 10 min. Warning beeps will sound approx.
30 sec. before time-out and then again immediately before
time-out.