SWRA591 April   2019 CC1310 , CC1350

 

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6.1.5 WB-DSSS Frequency Offset Tolerance

Figure 28 and Figure 29 show the frequency offset performance of WB-DSSS scheme. In contrast to narrowband low data rate systems, the crystal accuracy is not critical in this case as the RX bandwidth is relatively large.

From the results, it can be seen that sensitivity remains unchanged for considerable amount of crystal drift (±50 ppm).

figure-29-swra591.gifFigure 28. SimpleLink Long Range Frequency Offset Performance (915 MHz, K = 4, DSSS = 1, 240 kbps)
figure-30-swra591.gifFigure 29. SimpleLink Long Range Frequency Offset Performance (915 MHz, K = 4, DSSS = 8, 30 kbps)