Icom IC-U82 - Manual (Page 63)

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11
DIGITAL MODE OPERATION
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About D-STAR system
In the D-STAR system, repeater linking via a 10 GHz band
backbone and internet network (gateway connection) capa-
bilities are available. This system provides you with much
wider coverage range during digital voice mode operation.
• D-STAR system outline (440 MHz band)
For current existing repeater operation, stations that are com-
municating must be in the same repeater’s operating area.
However, in the D-STAR system as in the illustration at left,
the repeaters can be linked via the system repeaters (with a
10 GHz signal). Thus stations A and B can communicate even
though they are in different repeater operating areas.
Also, the D-STAR system repeaters are connectable through
the internet network— gateway connection capability.
For example, when station B uses the gateway connection
station B can communicate with the station C!
By using the gateway connection, long distance communica-
tions like DX operation may be possible with 144 MHz (for IC-
V82)/ 440MHz (for IC-U82) digital voice!
In the D-STAR system, an independent repeater’s operating
area is called an Area and a group that links repeaters via a
10 GHz backbone is called a Zone.
NOTE: The digital repeater for either 144 MHz or 440 MHz
of amateur radio bands operation is not available at pre-
sent of November 2004. It will be designed in the future.
Station A
Repeater A
Repeater D
440 MHz signal
Station C
Repeater C
440 MHz signal
10 GHz signal
440 MHz
signal
Station D
Station B
Repeater B
10 GHz signal
440 MHz signal
Internet
network
Internet
network