Adeunis RF ARF26 Manual do utilizador - Página 2

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GENERAL USE

The ARF26 radio module is a multi-channel FSK digital transmission radio-frequency
transceiver using the 868-870 MHz band. This transceiver proposes up to 9 transmission
channels enabling two-way half-duplex digital links up to 25 kBps Manchester. The
transceiver is composed of "rough" radio components; the transmission protocol (data
encoding/decoding) and radio module programming are performed by the associated logic.

CHOICE OF TRANSMISSION CHANNELS

The 868-870 MHz band is subdivided into 4 sub-bands authorising different duty cycles: ≤
0.1 %, ≤ 1%, ≤ 10% and ≤ 100%. The duty cycle of the product has to be calculated to know
which of the sub-bands can be used by the application. The table below presents the
different sub-bands with their duty cycle and the maximum number of channels that can be
envisaged in each sub-band.
Sub-band
n°
Band edges
868-868.6
(in MHz)
Duty cycle
Maximum
number of
channels
(*) The maximum apparent radiated power for sub-band #4 is limited to +7dBm.
The table below gives the details of the available channels:
Sub-band
868-868.6 MHz
duty cycle 1%
868.7-869.2 MHz
duty cycle 0.1%
869.4-869.65 MHz
duty cycle 10%
869.7-870 MHz
duty cycle 100%
05-11-V3-psn
1
2
868.7-869.2
≤ 1%
≤ 0.1 %
3
3
Channel
Frequency
1
868.100 MHz
2
868.300 MHz
3
868.500 MHz
4
868.783 MHz
5
868.950 MHz
6
869.117 MHz
7
869.525 MHz
8
869.775 MHz
9
869.925 MHz
3
869.4-869.65
869.7-870 (*)
≤ 10%
1
4
up to 100%
2
2