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According to the AN96841 guideline to set the PA/LNA part on Module, I only can get about -35dBm PA out with Handset detection. But it far away with the description on the Spec: 9.5dBm .
So, Is there any examples program or application profile to prove that?
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At which distance from the XT module do you obtain -35 dBm power? And what is the testing environment? Is it an open field with clear line of sight communication? Path losses reduce the transmitted power with distance. Have you used EVAL board or custom board for testing? What is the tx power level set in BLE component in Creator? You need to ensure that the tx power level is set to -6dBm in the BLE component to obtain 9.5dBm output power.
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At which distance from the XT module do you obtain -35 dBm power? And what is the testing environment? Is it an open field with clear line of sight communication? Path losses reduce the transmitted power with distance. Have you used EVAL board or custom board for testing? What is the tx power level set in BLE component in Creator? You need to ensure that the tx power level is set to -6dBm in the BLE component to obtain 9.5dBm output power.
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Hi,grsr: Thanks! It's very clear(within 10cm) to the EVAL Module on open air by Cypress Cysmart APP.
In addition, Why we must set the TX power level at -6dBm? if we set to 3dBm, is there any negative effection to the +9.5dBm power out?
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-35dBm output power within 10cm distance is expected. Free space path loss increases with the square of distance so that is why the RSSI is -35dBm. Basically the 9.5dBm output power is radiated by the chip antenna but with increasing distance, this radiated power reduces due to the path loss. The tx power level should be set at -6dBm to obtain 9.5dBm output power. The module was certified for 9.5dBm output power to ensure regulatory compliance. If you set it to 3dBm, the output power will easily exceed 9.5dBm and all the certifications will become invalid. That is why, you need to set the tx power level at -6dBm.
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Hi,grsr:
Thanks
if the PSoC BLE set to 3dBm, the CYBLE-224110-00 module could work still normally?is there any other bad influence? No thinking certification and no thinking power consumption.
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At 3dBm tx power, the XT module will still work normally but it will radiate power much greater than 10 dBm and this will violate BLE spec maximum output power limit of 10dBm. Not sure what you mean by bad influence but apart from this, I can't think of any other problem.