RFM23 Datasheet, PDF (46/152 Pages) –

RFM23
F > error
BWmod
2
=> BW ch-sel = 2×F error
When the AFC is disabled it is recommended to set the bandwidth of the channel select filter (BWch-sel) according
to the following:
BW F ch-sel = BWmod+2× error
When the required bandwidth (BW) is calculated then the three filter parameters, ndec_exp, dwn3_bypass and
filset, can be found from the table below. When the calculated bandwidth value is not exactly available then select
the higher available bandwidth closest to the calculated bandwidth.

Table 17. Filter Bandwidth Parameters
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BW
[kHz]
ndec_exp dwn3_bypass
1C-[6:4]
1C-[7]
filset
1C-[3:0]
41.7
1
45.2
1
47.9
1
56.2
1
64.1
1
69.2
1
75.2
0
83.2
0
90.0
0
95.3
0
112.1
0
127.9
0
137.9
0
142.8
1
167.8
1
181.1
1
191.5
0
225.1
0
248.8
0
269.3
0
284.9
0
335.5
0
361.8
0
420.2
0
0
2
0
3
0
4
0
5
0
6
0
7
0
1
0
2
0
3
0
4
0
5
0
6
0
7
1
4
1
5
1
9
1
15
1
1
1
2
1
3
1
4
1
8
1
9
1
10
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