2.4 GHz band low-power data communication system (Item 19-2 of Article 2 Paragraph 1 )



Items Technical standard
Assigned frequency ordesignated frequency 2,471 - 2,497MHz
Communication method One-way communication, simplex, semi-duplex, or duplex operation using spread spectrum (DS, FH or DS+FH)
Tolerance of frequency
(×10-6)
50
Tolerance of occupied bandwidth 26MHz
Antenna power Designated value : 10mW/MHz or less
Tolerance : +20%,-80%
Tolerance of unwanted emission intensity Below 2458MHz : 2.5µW
2458 to 2471MHz : 25µW
2497 through 2510MHz : 25µW
Over 2510MHz : 2.5µW
Spreading bandwidth 500kHz or more
Limit of secondary radiated emissions Below 1GHz : 4nW
1GHz or higher : 20nW
Interference prevention function Shall have the function of automatic transmission or reception of identification code.
Interference prevention device Carrier sensing or Correlation signal sensing(Limited to the equipment connected to telecommunication circuit.)
Note DS : Direct spreading
FH : Frequency hopping

Notice: Regulations in the Ordinance Regulating Radio Equipment shall have priority over the descriptions in the sheet when any difference is found between them. Further above descriptions do not cover all of the regulations.

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