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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CC2430-RTR1-F64Z датащи(PDF) 186 Page - Texas Instruments |
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CC2430-RTR1-F64Z датащи(HTML) 186 Page - Texas Instruments |
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186 / 234 page  CC2430 CC2430 PRELIMINARY Data Sheet (rev. 1.03) SWRS036A Page 186 of 232 Figure 55: Modulated spectrum plot 14.31 System Considerations and Guidelines 14.31.1 SRD regulations International regulations and national laws regulate the use of radio receivers and transmitters. SRDs (Short Range Devices) for license free operation are allowed to operate in the 2.4 GHz band worldwide. The most important regulations are ETSI EN 300 328 and EN 300 440 (Europe), FCC CFR-47 part 15.247 and 15.249 (USA), and ARIB STD-T66 (Japan). 14.31.2 Frequency hopping and multi- channel systems The 2.4 GHz band is shared by many systems both in industrial, office and home environments. CC2430 uses direct sequence spread spectrum (DSSS) as defined by [1] to spread the output power, thereby making the communication link more robust even in a noisy environment. With CC2430 it is also possible to combine both DSSS and FHSS (frequency hopping spread spectrum) in a proprietary non- IEEE 802.15.4 system. This is achieved by reprogramming the operating frequency (see the Frequency and Channel Programming section on page 183) before enabling RX or TX. A frequency synchronization scheme must then be implemented within the proprietary MAC layer to make the transmitter and receiver operate on the same RF channel. 14.31.3 Data burst transmissions The data buffering in CC2430 lets the user have a lower data rate link between the CPU and the radio module than the RF bit rate of 250 kbps. This allows the CPU to |
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