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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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XRAG2 датащи(PDF) 20 Page - STMicroelectronics |
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XRAG2 датащи(HTML) 20 Page - STMicroelectronics |
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20 / 33 page  Tag-to-reader protocol XRAG2 20/33 6.1.6 Tag-to-reader Miller sub carrier modulation preamble As for the FM0 base band modulation, the Tag supports the two Miller subcarrier modulation preamble formats, according to the TRext parameter, as specified in the EPCglobal Class 1 generation 2 RFID UHF specification, revision 1.0.9. Figure 15 shows Miller preamble according to the value of the TRext parameter of the Query command starting the inventory round. Figure 15. Tag-to-reader Miller Preamble 6.1.7 Tag-to-reader Miller subcarrier modulation end of signaling In accordance with the EPCglobal Class 1 generation 2 RFID UHF specification, revision 1.0.9, the tag miller subcarrier modulation signaling ends with a dummy ‘1’. Figure 16 shows the different possible Miller subcarrier modulation end of signaling sequences. M=2 M=4 M=8 Miller preamble (TRext = 0) 010111 4M/LF 01 0 1 1 1 4M/LF Miller preamble (TRext = 1) 0 1 0111 16M/LF M=2 M=4 010 1 1 1 16M/LF 01 0111 16M/LF M=8 ai12331 |
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