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< Use frequency band >

Audio type communication and data type communication " irregularity system " and the amateur band which can allow " occupied bandwidth " use
It does.
Trunk type communication (link between relay station) as for the frequency band which is used, from relationship of the occupied bandwidth which is needed 5.6
The amateur band above the GHz band is used.

< Transmission electric power >
Below the largest antenna power which is recognized in amateur bureau.

< Occupied bandwidth >

Communication system Transmission speed Occupied bandwidth
Audio type communication 4. The 8kbps from here Below
Data type communication Below Below
Trunk type communication Below 10 Below


< Carrier frequency interval >

Carrier frequency interval, considering the common characteristic of former analog FM system, makes as follows.
It interleaves as needed.

Communication system Transmission speed Carrier frequency interval Remark
Audio type communication 4. 8kbps 6. Above AMBE + data system
Data type communication 128kbps Above


< Sending and receiving frequency interval >

It adjusts sending and receiving frequency interval of audio type communication, to the frequency interval of former analog FM system.
Because data type communication makes simplex operation as a general rule, sending and receiving frequency becomes identical.
It adjusts sending and receiving frequency interval of trunk type communication to band plan.

< Audio coded system () >

Conversion rate Remark
AMBE 2. 4kbps FEC attaching mark 3. 6kbps


< Irregularity system >

Communication system Irregularity system
Audio type communication GMSK, QPSK and 4 value FSK
Data type communication GMSK, QPSK and 4 value FSK
Trunk type communication GMSK



< Multiplex system >

Multiplex system of trunk type communication makes ATM system. It conforms to ATM system concerning details.


< Transmission speed >

Communication system Transmission speed Preparation thought
Audio type communication Below
Data type communication Below With communication state X N time possible
Trunk type communication Below
Direct communication
Audio type communication Below Data type communication of 5600 M Hz band and 10 GHz band makes yes to the 5mbps.
Data type communication Below

Note: In the frequency band above the 24gHz it makes below the transmission speed 100Mbps.
Precision of transmission speed makes the below the ±10 ppm.


< Sending and receiving quality >

@ terminal bureau

Communication system Function Preparation thought Sending and receiving change time
Audio type communication Half duplex Manual operation and automatic operation change 100 m S or less
Data type communication Simplex operation At packet unit sending and receiving automatic change 50 mS or less


A relay station

Communication system Function Preparation thought Sending and receiving change time
Audio type communication Half duplex Automatic operation change 100 m S or less
Data type communication Simplex operation At packet unit sending and receiving automatic change 50 mS or less
Trunk type communication Full duplex systems It does not change sending and receiving

Note: Especially it does not stipulate the frequency band above the 24gHz.

Furthermore as for detailed technical information this

Standard system Ver4.3c of digitalization technology of amateur radio (PDF file - Japanese)
Abbreviation D-STAR (Digital Smart Technologies for Amateur Radio)

So far, you to move aside it started from everyone, in " the standard system Ver4.3 of digitalization technology of the amateur radio "
The inquiry which regards was collected to this way with the Q&A system.
Concerning standard system as for the inquiry we ask to JARL next generation communication commission.