Star Operation (Basic); Unique Features Of D-Star; What Is D-Star - Icom IC-705 Advanced Manual

13� D-STAR OPERATION (BASIC)

Unique features of D-STAR

• Easy Cross band operation through a
repeater
INTERNET INTERNET
430MHz 430MHz
CQCQ CQCQ
IMPORTANT! Before starting D-STAR, the following steps are required.
STEP 1
STEP 2
STEP 3
► You have completed the steps!!

What is D-STAR?

• D-STAR is a digital protocol standard developed by the Japan Amateur Radio League (JARL). The system
includes the DV mode for Digital Voice and the DD mode for Digital Data communications.
• D-STAR supports a comprehensive repeater system linked through the Internet, enabling you to make QSOs
with stations near or far from your location.
• D-STAR supports the DV mode at 4.8 kbps. Your call sign data, and either a short message, or GPS data can be
transmitted simultaneously with your voice signal.
Advanced Amateur radio technology of D-STAR
The DV mode has a bandwidth of only 6 kHz, compared to 16 kHz for the analog FM mode, with 5 kHz
deviation.
D-STAR utilizes the well-known GMSK modulation method that makes very efficient use of occupied
bandwidth.
D-STAR (F7W)
10 kHz 10 kHz 10 kHz 10 kHz
20 kHz 20 kHz
D-STAR occupies 10 kHz. The sound quality is good,
even though the bandwidth is narrow.
1200MHz 1200MHz
CQCQ CQCQ
Enter your call sign (MY) into the transceiver. (p. 13-3)
Register your call sign (MY) to a gateway repeater. (p. 13-4)
Enter your D-STAR equipment into your registration form. (p. 13-4)
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Frequency
6 kHz 6 kHz
10 kHz 10 kHz 10 kHz 10 kHz
20 kHz 20 kHz
• Easy call sign entry with the Repeater list
or TX/RX History
• The Call Sign Capture key
sign capture easy!
FM (F3E)
10 kHz 10 kHz 10 kHz 10 kHz
20 kHz 20 kHz
The regular FM mode occupies 20 kHz that is double
the bandwidth of D-STAR.
13-1
makes call
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Frequency
16 kHz 16 kHz
10 kHz 10 kHz 10 kHz 10 kHz
20 kHz 20 kHz