Items | Technical standard |
Assigned frequency or designated frequency | 2,400-2,483.5MHz |
Communication method | One-way communication, simplex, semi-duplex, or duplex operation of digital signal transmission including spread spectrum |
Tolerance of frequency (×10-6) | 50PPM |
Tolerance of occupied bandwidth | FH : 83.5MHz
FH + DS : 83.5MHz
FH + OFDM : 83.5MHz
OFDM , DS : 38MHz |
Antenna power | Designated value
(1) FH, FH+DS , FH+OFDM3mW/MHz
(used in the range of 2427 - 2470.75 MHz)
Occupied Bandwidth 38MHz: 5mW/MHz
(2) OFDM , DS other than (1)10mW/MHz
(3) Other than (1) & (2)10mW
Tolerance
+20%,-80% |
Antenna gain | 1) 2.14 dBi or less in principle
2) In case of directional antenna
(1) FH, FH+DS or FH+OFDM using 2427-2470.75 MHz
EIRP≦16.91 dBm/MHz
(2) OFDM or DS other than (1) EIRP≦22.14 dBm/MHz
(3) Other than (1) and (2): 22.14 dBm or less
(4) Half-power angle of directional antenna (e) in case of the item 2):e ≦ 360/A (The A is 10 in maximum.) |
Tolerance of spurious emission intensity | (1) Below 2387 MHz : 2.5μW
(2) 2387 to 2400 MHz : 25μW
(3) 2483.5 through 2496.5 MHz : 25μW
(4) Over 2496.5 MHz : 2.5μW |
Spreading bandwidth | DS,FH,FH+DS,FH+OFDM : 500kHz or more |
Spreading rate of spectrum | For DS system;(Spreading bandwidth) / (Frequency corresponding to transmission rate) ≧5 |
Holding time of hopping frequency | FH , FH+DS , FH+OFDM : 0.4 sec or lees
(The total sum of holding time at arbitrary frequencies within the time multiplied 0.4 sec by the spreading rate) |
Limit of secondary radiated emissions | (1) Below 1 GHz : 4 nW
(2) 1 GHz or higher : 20 nW |
Interference prevention function | Shall have the function of automatic transmission and reception of identification sign. |
Carrier Sensing function | Occupied Bandwidth 38MHz equipment only |
Structure | Shall be of the structure that the RF and modulator sections excluding antenna cannot easily be opened. |
Note | DS: Direct spread
FH: Frequency hopping
OFDM: Orthogonal frequency division multiplexing |
Note: The Technical Standards described here do not cover all of the regulated items.