inquiry to FCC_20181223

FCC ID: 2ACCJH102

RF Exposure Info

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FCCID_4137765

Air interface and operating mode ANSI Air Band Simultaneous Name of Voice Power Type C63.19 Interface (MHz) Transmitter Service Reduction Tested 850 VO Yes CMRS Voice* GSM 1900 BT and Wi-Fi NA GPRS/EDGE VD Yes Google Duo** 850 VO Yes CMRS Voice* WCDMA 1900 BT and Wi-Fi NA HSPA VD Yes Google Duo** Band VoLTE* LTE VD Yes BT and Wi-Fi NA 2/4/5/13/66 Google Duo** BT, GSM, Wi-Fi calling** Wi-Fi 2450 VD Yes WCDMA and NA Google Duo** LTE Wi-Fi, GSM, BT 2450 DT NA WCDMA and NA NA LTE VO: Legacy Cellular Voice Service from Table 7.1 in 7.4.2.1 of ANSI C63.19-2011 DT: Digital Transport (no voice) VD: IP Voice Service over Digital Transport * Ref Lev in accordance with 7.4.2.1 of ANSI C63.19-2011 and the July 2012 VoLTE interpretation ** Ref Lev −20 dBm0 1

Wi-Fi calling for T-coil measurement  1. Equipment setup  The test setup used for Wi-Fi calling T-coil measurement is shown in next page. The callbox used when performing Wi-Fi calling T-coil measurement is CMW500. The Data Application Unit (DAU) of the CMW500 was used to simulate IP Multimedia Subsystem (IMS) server.  2. Audio level settings  According to KDB 285076 D02, the average speech level of −20 dBm0 shall be used. The CMW500 was manually configured to ensure that the settings for speech input and full scale levels resulted in the -20dBm0 speech input level to the DUT for the Wi-Fi calling over IMS connection.  3. For the detail of test setup,  Following attached SPEAG document “TN-BK-10032018-C- VoWLAN_T-coil_w_CMW500” to perform Wi-Fi calling T-coil setup and measurement 2

Wi-Fi calling for T-coil measurement Test setup for Wi-Fi calling T-coil measurement 3

Follow the test plan to perform Wi-Fi calling T-coil testing Test plan Investigate the lowest and highest data rates to (1) Radio configuration investigation determine worst radio configuration to be used for testing by SNR comparison. (2) Codec Investigation Determine the worst-case codec by SNR comparison. Using the worst-case codec, a channel of worst band (3) Air Interface Investigation shall be tested 4

Follow the test plan to perform Wi-Fi calling T-coil testing_Radio configuration investigation 802.11b Radio configuration investigation 802.11n(20M) Radio configuration investigation Signal Signal Data Rate ABM1 ABM2 Data Rate ABM1 ABM2 Mode Channel Quality Mode Channel Quality [Mbps] [dB(A/m)] [dB(A/m)] [Mbps] [dB(A/m)] [dB(A/m)] [dB] [dB] 802.11b 6 1 2.37 -39.21 41.58 802.11n(20M) 6 MCS0 2.33 -39.39 41.72 802.11b 6 11 2.25 -39.30 41.55 802.11n(20M) 6 MCS7 2.40 -40.27 42.67 802.11g Radio configuration investigation 802.11n(40M) Radio configuration investigation Signal Signal Data Rate ABM1 ABM2 Data Rate ABM1 ABM2 Mode Channel Quality Mode Channel Quality [Mbps] [dB(A/m)] [dB(A/m)] [Mbps] [dB(A/m)] [dB(A/m)] [dB] [dB] 802.11g 6 6 2.22 -46.40 48.62 802.11n(40M) 6 MCS0 2.30 -41.77 44.07 802.11g 6 54 2.36 -46.76 49.12 802.11n(40M) 6 MCS7 2.34 -41.99 44.33 (1) Radio configuration investigation Investigate the lowest and highest data rates to determine worst radio configuration to be used for testing by SNR comparison. *Yellow represent the worst radio configuration *The data is for reference and example only 5

Follow the test plan to perform Wi-Fi calling T-coil testing_Codec investigation AMR Codec Investigation - VoWIFI over IMS WB AMR WB AMR NB AMR NB AMR Codec Setting: Orientation Band Standard Channel 23.85kbps 6.60kbps 12.2kbps 4.75kbps ABM1 (dBA/m) 2.17 2.25 2.67 2.36 ABM2 (dBA/m) -41.05 -40.3 -40.51 -40.44 Axial 2.4GHz 802.11b 6 Frequency Response Pass Pass Pass Pass Signal Quality (dB) 43.22 42.55 43.18 42.8 EVS Codec Investigation - VoWIFI over IMS EVS Primary EVS Primary EVS Primary EVS Primary Codec Setting: Orientation Band Standard Channel WB 13.2kbps WB 5.9kbps NB 13.2kbps NB 5.9kbps ABM1 (dBA/m) 3.41 2.49 3.9 3.98 ABM2 (dBA/m) -40.73 -40.28 -40.47 -39.62 Axial 2.4GHz 802.11b 6 Frequency Response Pass Pass Pass Pass Signal Quality (dB) 44.14 42.77 44.37 43.6 (2) Codec Investigation In this case, the worst radio configuration is 802.11b, hence, using 802.11b to determine the worst-case codec by SNR comparison. (WB AMR 6.6kbps is the worst codec in this case.) *Yellow represent the worst-case codec *The data is for reference and example only. 6

Following the test plan to perform Wi-Fi calling T-coil testing_Air interface investigation Air interface investigation for 2.4GHz WIFI Ambient Frequency Signal Bandwidth ABM1 ABM2 C63.19-2011 Mode Orientation Channel Noise Response Quality (MHz) [dB(A/m)] [dB(A/m)] Rating [dB(A/m)] Variation(dB) (dB) WLAN Axial 20 6 2.25 -40.30 -58.34 2.00 42.55 T4 802.11b Radial 20 6 -1.85 -41.94 -58.18 N/A 40.09 T4 (3) Air Interface Investigation Using the worst-case codec and radio configuration a channel of worst band shall be tested. The worst case mode for 2.4GHz WLAN in each probe orientation is tested. *The data is for reference and example only. 7


Document Created: 2018-12-21 16:50:33
Document Modified: 2018-12-21 16:50:33
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