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MRF89XA
APPENDIX A:
FSK AND OOK RX
FILTERS VS. BIT
RATES
TABLE A-1:
FSK RX FILTERS VS. BIT RATE
Bit Rate
Fdev (from
FDEVREG)
Filter Setting
(from
FILCREG)
Fdev + BR/2
(from
FDEVREG
and BRSREG)
RX 3dB BW
Programmed Actual
Maximum
Drift
kbps
100
66.67
50
40
33.33
28.57
25
22.22
20
18.18
16.67
15.38
14.29
12.5
10
5
2
± kHz
200
133
100
80
67
57
50
44
40
36
33
33
33
33
33
33
33
Hex
FF
E9
D6
B5
A4
A3
A3
72
72
72
72
41
41
41
41
41
41
kHz
250
166.7
125
100
83.3
71.4
62.5
55.6
50
45.5
41.7
41
40.5
39.6
38.3
35.8
34.3
kHz
400
250
175
150
125
100
100
75
75
75
75
50
50
50
50
50
50
kHz
306
214
158
137
116
96
96
69
69
69
69
47
47
47
47
47
47
± ppm
62
53
37
41
36
27
37
15
21
26
30
7
7
8
10
12
14
TABLE A-2:
OOK RX FILTERS VS. BIT RATE
Bit Rate
Fo + BR (from
PFCREG and
BRSREG)
Filter Setting
(from FILCREG)
RX 3 dB BW
Programmed Actual
Maximum Drift
kbps
kHz
Hex
kHz
kHz
± ppm
16.67 117 C1 150 154 41
12.5 113 C1 150 154 46
9.52 110 A0 125 129 22
8 108 A0 125 129 23
4.76 105 A0 125 129 27
2.41 102 A0 125 129 30
1.56 102 A0 125 129 30
Note 1: To comply with any regulatory body like FCC for example with Part 15 of the FCC Rules. Operation is sub-
ject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation. For
regulated FSK and OOK settings, see MRF89XA device module data sheet from Microchip Website.
? 2010–2011 Microchip Technology Inc.
Preliminary
DS70622C-page 0
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