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CC1021-RTR1 数据表(PDF) 11 Page - Texas Instruments |
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CC1021-RTR1 数据表(HTML) 11 Page - Texas Instruments |
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11 / 92 page  CC1021 SWRS045 Page 11 of 91 4.3. RSSI / Carrier Sense Section Parameter Min Typ Max Unit Condition / Note RSSI dynamic range 55 dB See section 12.5 on page 33 for details. RSSI accuracy ± 3 dB See section 12.5 on page 33 for details. RSSI linearity ± 1 dB RSSI attach time 51.2 kHz channel filter BW 102.4 kHz channel filter BW 307.2 kHz channel filter BW 730 380 140 µs µs µs Shorter RSSI attach times can be traded for lower RSSI accuracy. See section 12.5 on page 33 for details. Shorter RSSI attach times can also be traded for reduced sensitivity and selectivity by increasing the receiver channel filter bandwidth. Carrier sense programmable range 40 dB Accuracy is as for RSSI Carrier sense at ±100 kHz and ±200 kHz offset 102.4 kHz channel filter BW, 433 MHz ±100 kHz ±200 kHz 102.4 kHz channel filter BW, 868 MHz ±100 kHz ±200 kHz -57 -44 -60 -44 dBm dBm dBm dBm At carrier sense level 98 dBm, CW jammer at ±100 kHz and ±200 kHz offset. Carrier sense is measured by applying a signal at ±100 kHz and ±200 kHz offset and observe at which level carrier sense is indicated. Table 5. RSSI / Carrier sense parameters 4.4. IF Section Parameter Min Typ Max Unit Condition / Note Intermediate frequency (IF) 307.2 kHz See section 12.1 on page 30 for details. Digital channel filter bandwidth 38.4 to 307.2 kHz The channel filter 6 dB bandwidth is programmable from 9.6 kHz to 307.2 kHz. See section 12.2 on page 30 for details. AFC resolution 1200 Hz At 19.2 kBaud Given as Baud rate/16. See section 12.13 on page 42 for details. Table 6. IF section parameters |
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