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NARROW BAND - NB868 - User guide version V2.2.5 - Software version V2.3.0
14
Page
of 25
Blocking
>75dB
@ +/-1 MHZ, +/-2 MHz, +/- 10 MHz
Conducted measurement
2.3.4.2
Usage up to 25mW: maximum number of channels
The rest of the 863-870MHz band is segmented into sub-bands of 25mW, each with their regulatory requirements. The NB868 module makes
the best use of all the possibilities of this band to enable a maximum number of applications. The characteristics are given in the table below:
Parameters
Conditions
RF data rate
2.4kbps
9.6kbps
38.4kbps
57.6kbps Modification through AT COMMAND ATS254
Available channels
Up to 506 Up to 249 Up to 80
Up to 60 Modification through COMMAND ATS200
For each frequency is assigned a channel number «C» with
the formula : Frequency = 863.0125 + ((C-13)*0.0125) with
C= 13 to 571.
C values available depend on the data rate.
Please refer to the ARF868 channel list for more information
Modulation
2 GFSK
4 GFSK
Range
Up to
4km
Up to
2km
Up to 1km
Up to
1km
in open field
Duty cycle
Up to 1%
Depending on the frequency used and the
channel
See CEPT Recommendation 70-03 for more information
Spacing
12.5kHz*
25kHz
50kHz
75kHz
* spectral occupancy 2.4kbps being slightly greater than
12.5KHz, Adeunis RF advocates use N-2/N+2
Rejection on adjacent
channel (N-1/N+1)
46dBc
50dBc
39dBc
39dBc
Alternate channel
rejection (N-2/N+2)
46dBc
50dBc
39dBc
39dBc