Sub 1 GHz Transceiver Architecture Description
MKW01xxRM Reference Manual, Rev. 3, 04/2016
5-14
Freescale Semiconductor, Inc.
5.7.6
DC Cancellation
DC cancellation is required in zero-IF architecture transceivers to remove any DC offset generated through
self-reception. It is built into the device and its adjustable cutoff frequency
fc
is controlled in
RegRxBw
:
10b / 24
6
5.2
2.6
01b / 20
6
6.3
3.1
00b / 16
6
7.8
3.9
10b / 24
5
10.4
5.2
01b / 20
5
12.5
6.3
00b / 16
5
15.6
7.8
10b / 24
4
20.8
10.4
01b / 20
4
25.0
12.5
00b / 16
4
31.3
15.6
10b / 24
3
41.7
20.8
01b / 20
3
50.0
25.0
00b / 16
3
62.5
31.3
10b / 24
2
83.3
41.7
01b / 20
2
100.0
50.0
00b / 16
2
125.0
62.5
10b / 24
1
166.7
83.3
01b / 20
1
200.0
100.0
00b / 16
1
250.0
125.0
10b / 24
0
333.3
166.7
01b / 20
0
400.0
200.0
00b / 16
0
500.0
250.0
Table 5-6. Available DCC Cutoff Frequencies Expressed as Percentage of RXBW
DccFreq
in
RegRxBw
fc in % of RxBw
000
16
001
8
010 (default)
4
011
2
100
1
Table 5-5. Available RxBw Settings
fc
4
RxBw
2
2
DccFreq
2
+
-----------------------------------------
=
Содержание MKW01Z128
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