RFM22B Datasheet, PDF (22/74 Pages) List of Unclassifed Manufacturers – ISM TRANSCEIVER MODULE

RFM22B/23B
Table 12. Frequency Band Selection
fb[4:0] Value
N
Frequency Band
hbsel=0
hbsel=1
0
24
240–249.9 MHz
480–499.9 MHz
1
25
250–259.9 MHz
500–519.9 MHz
2
26
260–269.9 MHz
520–539.9 MHz
3
27
270–279.9 MHz
540–559.9 MHz
4
28
280–289.9 MHz
560–579.9 MHz
5
29
290–299.9 MHz
580–599.9 MHz
6
30
300–309.9 MHz
600–619.9 MHz
7
31
310–319.9 MHz
620–639.9 MHz
8
32
320–329.9 MHz
640–659.9 MHz
9
33
330–339.9 MHz
660–679.9 MHz
10
34
340–349.9 MHz
680–699.9 MHz
11
35
350–359.9 MHz
700–719.9 MHz
12
36
360–369.9 MHz
720–739.9 MHz
13
37
370–379.9 MHz
740–759.9 MHz
14
38
380–389.9 MHz
760–779.9 MHz
15
39
390–399.9 MHz
780–799.9 MHz
16
40
400–409.9 MHz
800–819.9 MHz
17
41
410–419.9 MHz
820–839.9 MHz
18
42
420–429.9 MHz
840–859.9 MHz
19
43
430–439.9 MHz
860–879.9 MHz
20
44
440–449.9 MHz
880–899.9 MHz
21
45
450–459.9 MHz
900–919.9 MHz
22
46
460–469.9 MHz
920–939.9 MHz
23
47
470–479.9 MHz
940–960 MHz
The chip will automatically shift the frequency of the Synthesizer down by 937.5 kHz (30 MHz ÷ 32) to achieve the
correct Intermediate Frequency (IF) when RX mode is entered. Low-side injection is used in the RX Mixing
architecture; therefore, no frequency reprogramming is required when using the same TX frequency and switching
between RX/TX modes.
Tel: [phone] Fax: [phone] E-mail: [e-mail] http://www.hoperf.com
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