KDB Inquiry_20190602

FCC ID: B94-AX201D2WRG

Cover Letter(s)

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FCCID_4403522

Objective • To optimize and keep good Wi-Fi performance for different user scenario or operating modes accordingly for this HP x360 Convertible PC. • The 2.4/5GHz TX power of WLAN radio module can be adjusted to different operating modes, for example: – Lid Close  No TX transmission – Laptop  Power level 1 (full power) – Tablet  Power level 2 (reduced) • Regarding LTE/WWAN bands, LTE/WWAN radio will adjust TX power to different use operating modes, for example: – Lid Close  No TX transmission – Laptop  Power level 1 (reduced) – Tablet  Power level 2 (reduced) 1 HP Confidential

WWAN SKU – WLAN/WWAN Antennas, and Sensor’s Location • Plot 1: Front View of DUT Plot 2: Back View of DUT Slot for antenna radiation Plastic Bezel G sensor Metal LCD Screen chassis WLAN 2nd TX WLAN 1st TX Lid Hall sensor G sensor WWAN TX WWAN RX WWAN RX WWAN RX Metal chassis Metal chassis 2 HP Confidential

WLAN SKU – WLAN Antennas, and Sensor’s Location • Plot 1: Front View of DUT Plot 2: Back View of DUT Slot for antenna radiation Plastic Bezel G sensor Metal LCD Screen chassis WLAN 2nd TX WLAN 1st TX Lid Hall sensor G sensor Metal chassis Metal chassis 3 HP Confidential

The illustration of Lid Angle – Hall sensor is used for Lid-Close mode detection. Lid Rotate Angle (0°≤Lid angle<10 °) 90° – 2 G-sensors (one is on panel side and one is on base side) which are used for Lid angel calculation for Laptop / Tablet modes detection. (10°<Lid angle≤190°, it is Laptop mode; 190°<Lid angle≤360°, it is Tablet mode) 180° G sensor Hinge Axis Lid Hall sensor Lid Angle G sensor 270° Plot 11: Lid Angle 0°/360° 4 HP Confidential

The Illustration of Lid Angle vs. Operating modes Lid Rotate Angle DUT operating mode Lid Angle description 90° Lid Close 0° ≤ Lid angle < 10° (Lid Hall Sensor Trigger) Laptop 10° < Lid angle ≤ 190° 180° Tablet 190° < Lid angle ≤ 360° Hinge Axis Book 10° < Lid angle ≤ 360° (Vertical) 270° WLAN 2nd TX WLAN 1st TX 0°/360° Table 3 Plot 12: Lid Close 5 HP Confidential

The Illustration of Lid Angle vs. Operating modes Lid Rotate Angle DUT operating mode Lid Angle description 90° Lid Close 0° ≤ Lid angle < 10° (Lid Hall Sensor Trigger) Laptop 10° < Lid angle ≤ 190° LCD Screen 180° Tablet 190° < Lid angle ≤ 360° WLAN 2nd TX WLAN 1st TX Hinge Axis Book 10° < Lid angle ≤ 360° Lid Angle (Vertical) 270° 0°/360° Table 3 Plot 13: Laptop 6 HP Confidential

The Illustration of Lid Angle vs. Operating modes Lid Rotate Angle DUT operating mode Lid Angle description 90° 180° Lid Close 0° ≤ Lid angle < 10° (Lid Hall Sensor Trigger) Laptop 10° < Lid angle ≤ 190° LCD Screen Tablet 190° < Lid angle ≤ 360° WLAN 2nd TX WLAN 1st TX Hinge Axis Book 10° < Lid angle ≤ 360° Lid Angle (Vertical) 270° 0°/360° Table 3 Plot 14: Tablet 7 HP Confidential

The Illustration of Lid Angle vs. Operating modes 180° Lid Rotate Angle DUT operating mode Lid Angle description Hinge Axis Lid Angle 90° 270° Lid Close 0° ≤ Lid angle < 10° (Lid Hall Sensor Trigger) WLAN 1st TX Laptop 10° < Lid angle ≤ 190° 0°/360° LCD Screen Tablet 190° < Lid angle ≤ 360° WLAN 2nd TX Book 10° < Lid angle ≤ 360° (Vertical) Plot 15: Book mode Table 3 8 HP Confidential

Maximum Specified WLAN Radio TX Power Estimation • Table 4 DUT operating WLAN 1st WLAN 2nd MIMO mode No TX No TX No TX Lid Close transmission transmission transmission 2.4GHz: 20.5 2.4GHz: 20.5 2.4GHz: 18.0 Power level 1 Laptop 5GHz: 20.5 5GHz: 20.5 5GHz: 19.0 (full power) 2.4GHz: 16.0 2.4GHz: 16.0 2.4GHz: 16.0 Tablet Power level 2 5GHz: 15.5 5GHz: 15.5 5GHz: 15.5 (reduced) 2.4GHz: 16.0 2.4GHz: 16.0 2.4GHz: 16.0 Book 5GHz: 15.5 5GHz: 15.5 5GHz: 15.5 • Unit: dBm 9 HP Confidential

Maximum Specified WWAN Radio TX Power Estimation Power level 1 Power level 2 Power level 1 Power level 2 Mode Band Mode Band (reduced) (reduced) (reduced) (reduced) Band 2 17.0 14.0 WCDMA Band 2 17.0 14.0 Band 4 18.5 15.0 Band 4 18.5 15.0 Band 5 22.0 18.5 Band 5 22.0 18.5 Band 7 17.5 14.0 Band 12 21.5 19.0 LTE FDD Band 13 21.5 20.5 Band 17 21.5 19.0 Band 25 17.0 14.0 Band 26 22.0 18.5 Band 30 17.0 14.5 Band 66 18.5 15.0 Band 38 19.5 16.0 LTE TDD Band 41 19.5 16.0

Proposed SAR Evaluation for WLAN/WWAN DUT operating WLAN mode SAR evaluation Power setting Laptop Required Power level 1 Tablet Required Power level 2 Book Required Power level 2 DUT operating WWAN mode SAR evaluation Power setting Laptop Required Power level 1 Tablet Required Power level 2 Book Required Power level 2 Note • 1. For tablet mode, SAR is measured with lid angle 360 degree/fully flipped condition. • 2. For book mode, it’s included in the SAR evaluation of tablet mode, therefore, it’s not required to 11 HP Confidential have an extra test.


Document Created: 2019-07-16 16:21:14
Document Modified: 2019-07-16 16:21:14
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