RFM23
BWmod
F
error
>
=> BW ch-sel = 2×F error
2
When the AFC is disabled it is recommended to set the bandwidth of the channel select filter (BWch-sel) according
to the following:
BW ch-sel = BWmod+2×F 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
BW
ndec_exp
1C-[6:4]
dwn3_bypass
1C-[7]
filset
[kHz]
1C-[3:0]
41.7
45.2
1
1
1
1
1
1
0
0
0
0
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
2
3
47.9
4
56.2
5
64.1
6
69.2
7
75.2
1
83.2
2
90.0
3
95.3
4
112.1
127.9
137.9
142.8
167.8
181.1
191.5
225.1
248.8
269.3
284.9
335.5
361.8
420.2
5
6
7
4
5
9
15
1
2
3
4
8
9
10
46
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