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SI4438 Datasheet(PDF) 21 Page - Silicon Laboratories |
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SI4438 Datasheet(HTML) 21 Page - Silicon Laboratories |
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21 / 44 page  Si4438 Rev 1.0 21 Table 13. Recommended Preamble Length Mode AFC Antenna Diversity Preamble Type Recommended Preamble Length Recommended Preamble Detection Threshold (G)FSK Disabled Disabled Standard 4 Bytes 20 bits (G)FSK Enabled Disabled Standard 5 Bytes 20 bits (G)FSK Disabled Disabled Non-standard 2 Bytes 0 bits (G)FSK Enabled Non-standard Not Supported (G)FSK Disabled Enabled Standard 7 Bytes 24 bits (G)FSK Enabled Enabled Standard 8 Bytes 24 bits OOK Disabled Disabled Standard 4 Bytes 20 bits OOK Disabled Disabled Non-standard 2 Bytes 0 bits OOK Enabled Not Supported Notes: 1. The recommended preamble length and preamble detection thresholds listed above are to achieve 0% PER. They may be shortened when occasional packet errors are tolerable. 2. All recommended preamble lengths and detection thresholds include AGC and BCR settling times. 3. “Standard” preamble type should be set for an alternating data sequence at the max data rate (…10101010…) 4. “Non-standard” preamble type can be set for any preamble type including …10101010... 5. When preamble detection threshold = 0, sync word needs to be 3 Bytes to avoid false syncs. When only a 2 Byte sync word is available the sync word detection can be extended by including the last preamble Byte into the RX sync word setting. |
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