CAN-AIR/2 Configuration
For the RF-Transmission CAN-AIR/2 uses the 2.4 GHz ISM-Band. This frequency range is also
used for WLAN- (IEEE 802.11) and Bluetooth- (IEEE 802.15) services but with different RF
channel assignments.
Direct communication with units of these other standards and the CAN-AIR/2 is not possible.
Due to limitation of the bandwidth of the ISM-band disturbances of communication in the
transmission channels could occur by overlapping.
For the communication between two CAN-AIR/2 modules it is recommended to choose a free
„RF channel“ or frequency which is not occupied by other RF standards in the same area.
IMPORTANT
The assignment of the WLAN channels according to IEEE 802.11 is shown in the
following table.
WLAN
channel
Frequency
[GHz]
preferred
channel acc. to
WLAN
Channel
Frequency
[GHz]
preferred
channel acc. to
1
2.412
IEEE802.11 b/g
8
2.447
2
2.417
9
2.452
IEEE802.11 g
3
2.422
IEEE802.11 n
10
2.257
4
2.427
11
2.462
IEEE802.11 b/n
5
2.432
IEEE802.11 g
12
2.467
6
2.437
IEEE802.11 b
13
2.472
IEEE802.11 g
7
2.442
14
2.484
IEEE802.11 b
(
Reference: http://en.wikipedia.org/wiki/IEEE_802.11, under licence of: http://creativecommons.org/licenses/by-sa/3.0/deed.en)
Figure 21:
Bandwidth of the WLAN transmission according to protocol IEEE 802.11b
Please note that the bandwidth depends on the protocol used.
Protocol
Bandwidth
[MHz]
IEEE 802.11b
22
IEEE 802.11g
20
IEEE 802.11n
40
CAN-AIR/2
Hardware Manual • Doc. No.: C.2067.21 / Rev. 1.5
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