ARF868 Radio Modems - User guide version V1.8.1
15
Page
of 26
2.3.3.2
Uso hasta 25 mW: número máximo de canales
El resto de la banda 863-870 MHz está segmentado en sub-bandas de 25 mW, cada una de ellas con sus propias exigencias reglamentarias. El
módem ARF868 explota al máximo las posibilidades de esta banda para permitir el máximo de aplicaciones. Las características están detalladas
en la siguiente tabla:
Parameters
Conditions
RF data rate
2.4kbps
9.6kbps
38.4kbps
57.6kbps
In
bold
, data rate by default.
Modification through AT COMMAND ATS254
(see chapter § 5.3)
Available channels
Up to 506
Up to 249
Up to 80
Up to 60
Modification through COMMAND ATS200
(see chapter §5.3)
Power up to 14dBm (500mW)
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.
See Appendix 1 at end of document for a
complete list of channels and frequencies
Available RF radia-
ted power
2 levels
+14 dBm
+10 dBm
In
bold
, RF power by default.
Modification through AT COMMAND ATS231
(see chapter §5.3)
Modulation
2 GFSK
4 GFSK
RX sensitivity
ARF868 MR
-122dBm
-116dBm
-112dBm
-110dBm
@BER 10
-3
Range ARF868 MR
TNC version
Up to 4km
Up to 2.5km
Up to 1km
Up to 1km
in open field
RX sensitivity
ARF868 MR
-109dBm
-106dBm
-100dBm
-100dBm
@BER 10
-3
Range ARF868 LR
TNC version
Up to 1km
Up to 700m
Up to 500m
Up to 500m
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 adja-
cent channel (N-1/
N+1)
46dBc
50dBc
39dBc
39dBc
Alternate channel
rejection (N-2/N+2)
46dBc
50dBc
39dBc
39dBc
Blocking
>75dB
@ +/-1 MHZ, +/-2 MHz, +/- 10 MHz
Conducted measurement
