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SX1211
WIRELESS & SENSING
7.6.1. Sensitivity Flatness
Sensitivity over the Frequency Band
-90.0
-92.0
-94.0
-96.0
-98.0
-100.0
-102.0
-104.0
-106.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
-2.0
863
864
865
866
867
868
869
870
Frequency [MHz]
Sensitivity
SAW Ripple
Figure 61: Sensitivity Across the 868 MHz Band
Sensitivity over the Frequency Band
-90.0
-92.0
-94.0
-96.0
-98.0
-100.0
-102.0
-104.0
-106.0
14.0
12.0
10.0
8.0
6.0
4.0
2.0
0.0
-2.0
902
904
906
908
910
912
914
916
918
920
922
924
926
928
Frequency [MHz]
Sensitivity
SAW Ripple
Figure 62: Sensitivity Across the 915 MHz Band
Notes:
Measured in FSK mode only. OOK sensitivity characteristics will be similar.
The sensitivity difference along the band remains inside the ripple performance of the SAW filter (the nominal
passband of the 869 MHz SAW filter is 868 – 870 MHz)
The SAW filter ripple response is referenced to its insertion loss at 869 MHz and 915 MHz for each filter.
Rev 8 – February 2013
Page 77 of 92
www.semtech.com
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