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SX1211
WIRELESS & SENSING
ACR in OOK Mode
60
50
40
30
20
10
0
-300
-200
-100
0
100
200
300
-10
-20
Offset [kHz]
Figure 71: ACR in OOK Mode
Notes:
In FSK mode, the unwanted signal is unmodulated (as described in the EN 300-220 V2.1.1).Co-Channel
Rejection (CCR, Offset = 0kHz) is positive due to the DC cancellation process of the zero-IF architecture
In OOK mode, the polyphase filter efficiency is limited, thus limiting the adjacent channel rejection at 2xFo
distance.
7.6.7. Output Power Flatness
Pout Over the Frequency Band
12.0
10.0
8.0
6.0
4.0
2.0
0.0
4.0
2.0
0.0
-2.0
-4.0
-6.0
-8.0
863
864
865
866
867
868
869
870
Frequency [MHz]
Pout
SAW Ripple
Figure 72: Pout for 869 MHz Band Operation
Rev 8 – February 2013
Page 82 of 92
www.semtech.com
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