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14040868 App H Body Detect Validation
Apple Inc. E8147A SMARTPHONE BCG-E8147A BCGE8147A e8147a
Apple Inc. E8139A SMARTPHONE BCG-E8139A BCGE8139A e8139a
Apple Inc. E8146A SMARTPHONE BCG-E8146A BCGE8146A e8146a
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Document DEVICE REPORTGetApplicationAttachment.html?id=6103041Model Number: A2632 Date: 7/29/2022 POWER REDUCTION VERIFICATION This device supports manufacturer's proprietary power reduction mechanism called, `Detect mode' for the cellular, Wi-Fi and Bluetooth transmitters. There are additional power reduction mechanisms for the Wi-Fi and Bluetooth transmitters based on the operating state of the cellular and (for Bluetooth) Wi-Fi transmitters. Details of these mechanisms can be found in the Operational Description. The verification plan consists of measuring the power levels of the cellular, Bluetooth and Wi-Fi transmitters under different operating conditions related to the power reduction mechanisms. A. Verification of Body Detect mechanism was performed for the following test cases for cellular, Wi-Fi and Bluetooth transmitters. · In-hand · On a stationary object (placed on a table) B. Verification of power reduction levels for Wi-Fi was performed with cellular transmitter on and off. C. Verification of power reduction levels for Bluetooth and Wi-Fi was performed with different combinations of cellular transmitter on and off and Wi-Fi transmitter on and off. For testing purposes the device was loaded with a power table1 for each transmitter that had different power settings for each of the operating states. The target / expected power level and measured power levels are detailed in the following tables and clearly show that mechanisms operate as expected. RLAN: Based on the utilization ratio, a power control algorithm will allow the active WLAN to increase power until the utilization ratio approaches the limit. The algorithm will then disable the power increase until the utilization ratio decreases. A predictive power control feature further ensures regulatory compliance by disabling all transmitters if there are any scenarios where aggregate maximum WLAN transmissions over the next 1-second interval could cause the utilization ratio to exceed the regulatory limit. Smart Tx: This device incorporates the Smart Transmit (SmartTX) SAR averaging algorithm provided by Qualcomm for cellular technologies. SmartTX contrils the Tx power of the cellular-based wireless device in real-time to maintain the time-averaged Tx power, and in turn, time-averaged RF exposure, below the predefined time-averaged power limit characterized for each technology and band. Model Number: A2632 Date: 7/29/2022 Table 1 Body detect validation for cellular Target Power Measured Power Air Transport Band Mode A (Head) Mode B (Body) Stationary In Hand On Knee GSM 1900 (2Slots) 31.00 dBm 27.50 dBm 28.50 dBm 20.30 dBm 25.10 dBm WCDMA B4 25.20 dBm 19.10 dBm 20.10 dBm 12.20 dBm 17.30 dBm B2 25.70 dBm 21.50 dBm 21.40 dBm 13.90 dBm 19.20 dBm B25 25.70 dBm 21.50 dBm 21.40 dBm 14.80 dBm 18.90 dBm LTE FDD B30 25.70 dBm 21.40 dBm 22.40 dBm 14.40 dBm 19.40 dBm B7 25.30 dBm 19.70 dBm 19.40 dBm 12.70 dBm 17.20 dBm LTE TDD B41 25.70 dBm 22.20 dBm 23.20 dBm 15.20 dBm 20.70 dBm B48 23.90 dBm 21.60 dBm 21.60 dBm 14.30 dBm 19.60 dBm All measured values were within the expected tolerances of the target / expected power levels programmed into the power table for the head versus body states. Mechanism of body detect was verified. 1 The power tables used for the mechanism validation may not match the production power tables detailed in the main SAR report because production power levels are not established at the time these measurements were made. Model Number: A2632 Date: 7/29/2022 Table 2 Body detect and Cellular State validation for Wi-Fi Body detect Head (device stationary on table) Body (device in hand) Cellular State ON OFF ON OFF 2.4 GHz 11n HT20 Ch6 SISO E: 16 M: 15.9 E: 20.5 M: 20.3 E: 17.75 M: 17.7 E: 20.75 M: 20.6 5.0 GHz 802.11n HT20 Ch40 SISO Ant6 E: 13.5 M: 13.2 E: 18 M: 17.8 E: 14 M: 13.75 E: 18 M: 17.65 All measured power values (M) were within the expected tolerances of the target / expected power levels (E) programmed into the power table for the head versus body and cellular on/off states. Mechanism of body detect and cellular state was verified Table 3 Body detect and Cellular State validation for Wi-Fi Body detect Head (device on table) Body (device in hand) Cellular State ON OFF ON OFF 5GHz Wi-Fi ON OFF ON OFF ON OFF ON OFF state Expected power condition Plow mode A BT Table P1 PHigh mode A BT Table P3 PHigh mode A BT Table P5 PStandalone BT Table P7 Plow mode B BT Table P2 PHigh mode B BT Table P4 PHigh mode B BT Table P6 PStandalone BT Table P8 Power (dBm) E: 8 M: 7.7 E: 14 M: 13.8 E: 14 M: 13.7 E: 18.5 M: 18.1 E: 9 M: 8.9 E: 15 M: 14.75 E: 15 M: 14.8 E: 18.5 M: 18.35 Bluetooth transmitter set for channel 39 in EDR mode. All measured power values (M) were within the expected tolerances of the target / expected power levels (E) programmed into the power table for the head versus body, cellular on/off and Wi-Fi on/off states. Mechanism of body detect and cellular state and Wi-Fi state was verified 2 The power tables used for the mechanism validation may not match the production power tables detailed in the main SAR report because production power levels are not established at the time these measurements were made
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