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CC3230S Scheda tecnica(PDF) 35 Page - Texas Instruments |
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CC3230S Scheda tecnica(HTML) 35 Page - Texas Instruments |
35 / 104 page (5) Typical numbers assume a VSWR of 1.5:1. 8.7 TX Power Control The CC3230x has several options for modifying the output power of the device when required. It is possible to lower the overall output power at a global level using the global TX power level setting. In addition, the 2.4 GHz band allows the user to enter additional back-offs 1, per channel, region 2and modulation rates 3, via Image creator (see the UniFlash CC3x20, CC3x35 SimpleLink™ Wi-Fi® and Internet-on-a chip™ Solution ImageCreator and Programming Tool User's Guide for more details). Figure 8-1, Figure 8-2, and Figure 8-3 show TX power and IBAT versus TX power level settings for the CC3230S device at modulations of 1 DSSS, 6 OFDM, and 54 OFDM, respectively. For the CC3230SF device, the IBAT current has an increase of approximately 10 mA to 15 mA depending on the transmitted rate. The TX power level will remain the same. In Figure 8-1, the area enclosed in the circle represents a significant reduction in current during transition from TX power level 3 to level 4. In the case of lower range requirements (14-dBm output power), TI recommends using TX power level 4 to reduce the current. TX power level setting 19.00 17.00 15.00 13.00 11.00 9.00 7.00 5.00 3.00 1.00 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 280.00 264.40 249.00 233.30 218.00 202.00 186.70 171.00 155.60 140.00 1 DSSS Color by TX Power (dBm) IBAT (VBAT @ 3.6 V) Figure 8-1. TX Power and IBAT vs TX Power Level Settings (1 DSSS) 1 The back-off range is between -6 dB to +6 dB in 0.25dB increments. 2 FCC/ISED, ETSI (Europe), and Japan are supported. 3 Back-off rates are grouped into 11b rates, high modulation rates (MCS7, 54 OFDM and 48 OFDM), and lower modulation rates (all other rates). www.ti.com CC3230S, CC3230SF SWRS226 – FEBRUARY 2020 Copyright © 2020 Texas Instruments Incorporated Submit Document Feedback 35 Product Folder Links: CC3230S CC3230SF |
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