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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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UM1865 датащи(PDF) 122 Page - STMicroelectronics |
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UM1865 датащи(HTML) 122 Page - STMicroelectronics |
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122 / 132 page  Vendor specific commands UM1865 122/132 DocID027514 Rev 1 The controller will generate a command complete event. 4.7.8 Set_Tx_power_level Description: This command sets the TX power level of the BlueNRG-MS. By controlling the EN_HIGH_POWER and the PA_LEVEL, the combination of the 2 determines the output power level (dBm). See the table below. When the system starts up or reboots, the default TX power level will be used, which is the maximum value of 8 dBm. Once this command is given, the output power will be changed instantly, regardless if there is Bluetooth communication going on or not. For example, for debugging purpose, the BlueNRG-MS can be set to advertise all the time. And use this command to observe the signal strength changing. The system will keep the last received TX power level from the command, i.e. the 2nd command overwrites the previous TX power level. The new TX power level remains until another Set TX Power command, or the system reboots. Table 284. Set_Tx_power_level Command name Parameters Return Set_Tx_power_level (0xFC0F) EN_HIGH_POWER PA_LEVEL Status Table 285. Set_Tx_power_level command parameters Parameter Size Description EN_HIGH_POWER 1 byte Can be only 0 or 1. Set high power bit on or off. PA_LEVEL 1 byte Can be from 0 to 7. Set the PA level value. Table 286. Tx_power_level command parameters combination EN_HIGH_POWER PA_LEVEL TX Power Level (dBm) 0 0 -18 0 1 -14.7 0 2 -11.4 0 3 -8.1 0 4 -4.9 0 5 -1.6 0 6 1.7 0 7 5.0 1 0 -15 1 1 -11.7 1 2 -8.4 |
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