SAR Report

FCC ID: A4R-X1

RF Exposure Info

Download: PDF
FCCID_1939298

FCC OET BULLETIN 65 SUPPLEMENT C 01-01 IEEE Std 1528-2003 and 1528a-2005 (Class II Permissive Change) SAR EVALUATION REPORT For Glass Model: XEB FCC ID: A4R-X1 Report Number: 13U14955-5A Issue Date: 4/15/2013 Prepared for Google Inc. 1600 Amphitheatre Parkway Mountain View, CA 94043 Prepared by UL CCS 47173 BENICIA STREET FREMONT, CA 94538, U.S.A. TEL: (510) 771-1000 FAX: (510) 661-0888

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 Revision History Rev. Issue Date Revisions Revised By -- 4/12/2013 Initial issue -- A 4/15/2013 Sections 7 and 9 – corrected references to other Dave Weaver sections Section 10 – clarified output power tolerances Section 12.3 – corrected system performance result table Section 15 – corrected power level used for test exclusion calculation Page 2 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 Table of Contents 1. Attestation of Test Results ............................................................................................................. 5 2. Test Methodology ........................................................................................................................... 6 3. Facilities and Accreditation ........................................................................................................... 6 4. Calibration and Uncertainty ........................................................................................................... 7 4.1. Measuring Instrument Calibration .............................................................................................. 7 4.2. Measurement Uncertainty .......................................................................................................... 8 5. Measurement System Description and Setup ............................................................................... 9 6. SAR Measurement Procedure ...................................................................................................... 10 6.1. Normal SAR Measurement Procedure ..................................................................................... 10 6.2. Volume Scan Procedures ........................................................................................................ 12 7. Device Under Test......................................................................................................................... 13 7.1. General Information ................................................................................................................. 13 7.2. Band and Air Interfaces ........................................................................................................... 13 7.3. Test Rationale.......................................................................................................................... 13 8. Simultaneous Transmission ........................................................................................................ 14 9. RF Exposure Conditions .............................................................................................................. 15 9.1. Exposure Conditions ................................................................................................................ 15 10. RF Output Power Measurement ............................................................................................... 16 10.1. Wi-Fi (2.4 GHz Band) ........................................................................................................... 16 10.2. Bluetooth .............................................................................................................................. 17 11. Tissue Dielectric Properties ..................................................................................................... 18 11.1. Composition of Ingredients for the Tissue Material Used in the SAR Tests .......................... 19 11.2. Tissue Dielectric Parameter Check Results .......................................................................... 19 12. System Performance Check ..................................................................................................... 20 12.1. System Performance Check Measurement Conditions ......................................................... 20 12.2. Reference SAR Values for System Performance Check....................................................... 20 12.3. System Performance Check Results .................................................................................... 20 13. SAR Test Results ...................................................................................................................... 21 13.1. Wi-Fi (2.4 GHz Band) ........................................................................................................... 21 14. SAR Measurement Variability ................................................................................................... 22 14.1. The Highest Measured SAR Configuration in Each Frequency Band ................................... 22 Page 3 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 15. Standalone SAR Test Exclusion .............................................................................................. 23 15.1. Estimated SAR ..................................................................................................................... 23 16. Appendixes ................................................................................................................................ 24 16.1. System Performance Check Plots ........................................................................................ 24 16.2. SAR Test Plots for WiFi 2.4 GHz Band ................................................................................. 24 16.3. Calibration Certificate for E-Field Probe EX3DV4 - SN 3751 ................................................ 24 16.4. Calibration Certificate for D2450V2 - SN 899 ....................................................................... 24 17. External Photos ......................................................................................................................... 25 18. Antenna Locations & Separation Distances ............................................................................ 26 19. Setup Photos ............................................................................................................................. 27 Page 4 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 1. Attestation of Test Results Applicant Google DUT description Glass Model XEB Test device is An identical prototype Device category Portable Portabl Exposure category General Population/Uncontrolled Exposure Date tested 3/26/2013 FCC Rule Parts Freq. Range Highest 1-g SAR Limit 15.247 2412-2462 MHz Head: 1.42 W/kg (Ear Side) 1.6 W/kg Applicable Standards Test Results FCC OET Bulletin 65 Supplement C 01-01, IEEE Std 1528-2003 and 1528a-2005 Pass UL CCS tested the above equipment in accordance with the requirements set forth in the above standards. All indications of Pass/Fail in this report are opinions expressed by UL CCS based on interpretations and/or observations of test results. Measurement Uncertainties were not taken into account and are published for informational purposes only. The test results show that the equipment tested is capable of demonstrating compliance with the requirements as documented in this report. Note: The results documented in this report apply only to the tested sample, under the conditions and modes of operation as described herein. This document may not be altered or revised in any way unless done so by UL CCS and all revisions are duly noted in the revisions section. Any alteration of this document not carried out by UL CCS will constitute fraud and shall nullify the document. This report must not be used by the client to claim product certification, approval, or endorsement by NVLAP, NIST, any agency of the Federal Government, or any agency of any government (NIST Handbook 150, Annex A). This report is written to support regulatory compliance of the applicable standards stated above. Approved & Released For UL CCS By: Prepared By: Dave Weaver Bobby Bayani Wise Program Manager SAR Engineer UL CCS UL CCS Page 5 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 2. Test Methodology The tests documented in this report were performed in accordance with FCC OET Bulletin 65 Supplement C Edition 01-01, IEEE STD 1528-2003 and the following KDB Procedures: o 248227 D01 SAR meas for 802 11abg v01r02 o 447498 D01 General RF Exposure Guidance v05 o 690783 D01 SAR Listings on Grants v01r02 o 865664 D01 SAR measurement 100 MHz to 6 GHz v01 o 865664 D02 SAR Reporting v01 3. Facilities and Accreditation The test sites and measurement facilities used to collect data are located at 47173 Benicia Street, Fremont, California, USA. UL CCS is accredited by NVLAP, Laboratory Code 200065-0. The full scope of accreditation can be viewed at http://www.ccsemc.com. Page 6 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 4. Calibration and Uncertainty 4.1. Measuring Instrument Calibration The measuring equipment used to perform the tests documented in this report has been calibrated in accordance with the manufacturers’ recommendations, and is traceable to recognized national standards. Cal. Due date Name of Equipment Manufacturer Type/Model Serial No. MM DD Year Dielectronic Probe kit HP 85070C N/A N/A S-Parameter Network Analyzer Agilent 8753ES MY40001647 6 27 2013 Synthesized Signal Generator HP 8665B 3744A01084 5 3 2013 Data Acquisition Electronics SPEAG DAE3 427 1 9 2014 E-Field Probe SPEAG EX3DV4 3751 11 15 2013 Thermometer ERTCO 639-1S 8350 7 30 2013 System Validation Dipole SPEAG D2450V2 899 10 5 2013 Power Meter Agilent N1912A MY52310061 7 5 2013 Power Sensor Ch A Agilent N1921A MY52260009 7 5 2013 Power Sensor Ch B Agilent N1921A MY52270022 7 21 2013 Power Meter HP 438A 2822A05684 10 7 2013 Power Sensor A HP 8481A 2702A66876 8 1 2013 Power Sensor B HP 8482A 2349A08568 4 14 2013 Amplifier MITEQ 4D00400600-50-30P 1620606 N/A Directional coupler Werlatone C8060-102 2141 N/A Page 7 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 4.2. Measurement Uncertainty Per KDB 865664, when no measured SAR values exceed 1.5 W/kg, measurement uncertainty analysis does not need to be provided in the test report. Page 8 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 5. Measurement System Description and Setup The DASY5 system used for performing compliance tests consists of the following items:  A standard high precision 6-axis robot with controller, teach pendant and software. An arm extension for accommodating the data acquisition electronics (DAE).  An isotropic Field probe optimized and calibrated for the targeted measurement.  A data acquisition electronics (DAE) which performs the signal amplification, signal multiplexing, AD- conversion, offset measurements, mechanical surface detection, collision detection, etc. The unit is battery powered with standard or rechargeable batteries. The signal is optically transmitted to the EOC.  The Electro-optical converter (EOC) performs the conversion from optical to electrical signals for the digital communication to the DAE. To use optical surface detection, a special version of the EOC is required. The EOC signal is transmitted to the measurement server.  The function of the measurement server is to perform the time critical tasks such as signal filtering, control of the robot operation and fast movement interrupts.  The Light Beam used is for probe alignment. This improves the (absolute) accuracy of the probe positioning.  A computer running WinXP or Win7 and the DASY5 software.  Remote control and teach pendant as well as additional circuitry for robot safety such as warning lamps, etc.  The phantom, the device holder and other accessories according to the targeted measurement. Page 9 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 6. SAR Measurement Procedure 6.1. Normal SAR Measurement Procedure Step 1: Power Reference Measurement The Power Reference Measurement and Power Drift Measurements are for monitoring the power drift of the device under test in the batch process. The minimum distance of probe sensors to surface determines the closest measurement point to phantom surface. The minimum distance of probe sensors to surface is 2.1 mm. This distance cannot be smaller than the distance of sensor calibration points to probe tip as defined in the probe properties. Step 2: Area Scan The Area Scan is used as a fast scan in two dimensions to find the area of high field values, before doing a fine measurement around the hot spot. The sophisticated interpolation routines implemented in DASY software can find the maximum locations even in relatively coarse grids. When an Area Scan has measured all reachable points, it computes the field maximal found in the scanned area, within a range of the global maximum. The range (in dB) is specified in the standards for compliance testing. For example, a 2 dB range is required in IEEE Standard 1528 and IEC 62209 standards, whereby 3 dB is a requirement when compliance is assessed in accordance with the ARIB standard (Japan). If only one Zoom Scan follows the Area Scan, then only the absolute maximum will be taken as reference. For cases where multiple maximums are detected, the number of Zoom Scans has to be increased accordingly. Area Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01 Page 10 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 Step 3: Zoom Scan Zoom Scans are used to assess the peak spatial SAR values within a cubic averaging volume containing 1 g and 10 g of simulated tissue. The Zoom Scan measures points (refer to table below) within a cube whose base faces are centered on the maxima found in a preceding area scan job within the same procedure. When the measurement is done, the Zoom Scan evaluates the averaged SAR for 1 g and 10 g and displays these values next to the job’s label. Zoom Scan Parameters extracted from KDB 865664 D01 SAR Measurement 100 MHz to 6 GHz v01 (Draft) Step 4: Power drift measurement The Power Drift Measurement measures the field at the same location as the most recent power reference measurement within the same procedure, and with the same settings. The Power Drift Measurement gives the field difference in dB from the reading conducted within the last Power Reference Measurement. This allows a user to monitor the power drift of the device under test within a batch process. The measurement procedure is the same as Step 1. Step 5: Z-Scan (FCC only) The Z Scan measures points along a vertical straight line. The line runs along the Z-axis of a one-dimensional grid. In order to get a reasonable extrapolation the extrapolated distance should not be larger than the step size in Z- direction. Page 11 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 6.2. Volume Scan Procedures Step 1: Repeat Step 1-4 in Section 6.1 Step 2: Volume Scan Volume Scans are used to assess peak SAR and averaged SAR measurements in largely extended 3-dimensional volumes within any phantom. This measurement does not need any previous area scan. The grid can be anchored to a user specific point or to the current probe location. Step 3: Power drift measurement The Power Drift Measurement measures the field at the same location as the most recent power reference measurement within the same procedure, and with the same settings. The Power Drift Measurement gives the field difference in dB from the reading conducted within the last Power Reference Measurement. This allows a user to monitor the power drift of the device under test within a batch process. The measurement procedure is the same as Step 1. Page 12 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 7. Device Under Test 7.1. General Information Glass: Heads- UP Devices (HUD) with 802.11 b/g (HT20) 2.4GHz WLAN + BT. Normal operation Head worn Accessory N/A 7.2. Band and Air Interfaces Tx Frequency Bands 802.11b/g: 2412 - 2462 MHz Bluetooth: 2402 - 2480 MHz Modulation WiFi 802.11b/g Bluetooth Ver. 4.0 Duty Cycle 802.11b/g: 100% 7.3. Test Rationale The DUT resembles a pair of spectacles and is worn in the same manner. The antenna is located behind the ear (see section 17 and 18). A KDB enquiry was made to the FCC to determine how to perform SAR testing. Due to the shape of the DUT it was not possible to effectively test it using the head phantom. The DUT was tested against the flat phantom to ensure the closest antenna to user separation distance was assessed. Testing was performed to assess SAR upon the head and the ear. See section 19 for the test setup photos. Page 13 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 8. Simultaneous Transmission WiFi 2.4 GHz and Bluetooth cannot transmit simultaneously. Page 14 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 9. RF Exposure Conditions Refer to Section 18 “Antenna Location and Separation Distances” for the specific details of the antenna- to-antenna, antenna-to-edge(s) distances, and device orientation description. 9.1. Exposure Conditions Test Configurations SAR Required Note Head Side Yes Ear Side Yes Page 15 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 10. RF Output Power Measurement 10.1. Wi-Fi (2.4 GHz Band) Output Power IEEE 802.11 (dBm) Tolerance b g Target 15.0 15.0 Target powers are absolute maximums Required Test Channels per KDB 248227 D01 “Default Test Channels” Mode Band GHz Channel 802.11b 802.11g   # 2.412 1 802.11b/g 2.4 GHz 2.437 6     # 2.462 11 Notes:  = “default test channels”  = possible 802.11g channels with maximum average output ¼ dB  the “default test channels” # = when output power is reduced for channel 1 and /or 11 to meet restricted band requirements the highest output channels closest to each of these channels should be tested. Band Freq. Target Pwr Avg Pwr Mode Ch # (MHz) (MHz) (dBm) (dBm) 1 2412 15.0 15.0 802.11b 6 2437 15.0 15.0 11 2462 15.0 15.0 2.4 1 2412 15.0 14.7 802.11g 6 2437 15.0 15.0 11 2462 15.0 15.0 Page 16 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 10.2. Bluetooth Output Power GFSK (dBm) 8PSK (dBm) Tolerance Target 9.7 7.7 Conducted Avg Power Mode Channel # Freq. (MHz) (dBm) (mW) 0 2402 7.1 5.1 GFSK 39 2441 7.7 5.9 78 2480 7.6 5.8 0 2402 5.0 3.2 8PSK 39 2441 5.7 3.7 78 2480 5.7 3.7 Target powers are absolute maximums Page 17 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 11. Tissue Dielectric Properties IEEE Std 1528-2003 Table 2 Head Target Frequency (MHz) er s (S/m) 300 45.3 0.87 450 43.5 0.87 835 41.5 0.90 900 41.5 0.97 1450 40.5 1.20 1800 – 2000 40.0 1.40 2450 39.2 1.80 2600 39.0 1.96 3000 38.5 2.40 FCC OET Bulletin 65 Supplement C 01-01 Head Body Target Frequency (MHz) er s (S/m) er s (S/m) 150 52.3 0.76 61.9 0.80 300 45.3 0.87 58.2 0.92 450 43.5 0.87 56.7 0.94 835 41.5 0.90 55.2 0.97 900 41.5 0.97 55.0 1.05 915 41.5 0.98 55.0 1.06 1450 40.5 1.20 54.0 1.30 1610 40.3 1.29 53.8 1.40 1800 – 2000 40.0 1.40 53.3 1.52 2450 39.2 1.80 52.7 1.95 3000 38.5 2.40 52.0 2.73 5000 36.2 4.45 49.3 5.07 5100 36.1 4.55 49.1 5.18 5200 36.0 4.66 49.0 5.30 5300 35.9 4.76 48.9 5.42 5400 35.8 4.86 48.7 5.53 5500 35.6 4.96 48.6 5.65 5600 35.5 5.07 48.5 5.77 5700 35.4 5.17 48.3 5.88 5800 35.3 5.27 48.2 6.00 Page 18 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 11.1. Composition of Ingredients for the Tissue Material Used in the SAR Tests The following tissue formulations are provided for reference only as some of the parameters have not been thoroughly verified. The composition of ingredients may be modified accordingly to achieve the desired target tissue parameters required for routine SAR evaluation. Ingredients Frequency (MHz) (% by weight) 450 835 915 1900 2450 Tissue Type Head Body Head Body Head Body Head Body Head Body Water 38.56 51.16 41.45 52.4 41.05 56.0 54.9 40.4 62.7 73.2 Salt (NaCl) 3.95 1.49 1.45 1.4 1.35 0.76 0.18 0.5 0.5 0.04 Sugar 56.32 46.78 56.0 45.0 56.5 41.76 0.0 58.0 0.0 0.0 HEC 0.98 0.52 1.0 1.0 1.0 1.21 0.0 1.0 0.0 0.0 Bactericide 0.19 0.05 0.1 0.1 0.1 0.27 0.0 0.1 0.0 0.0 Triton X-100 0.0 0.0 0.0 0.0 0.0 0.0 0.0 0.0 36.8 0.0 DGBE 0.0 0.0 0.0 0.0 0.0 0.0 44.92 0.0 0.0 26.7 Dielectric Constant 43.42 58.0 42.54 56.1 42.0 56.8 39.9 54.0 39.8 52.5 Conductivity (S/m) 0.85 0.83 0.91 0.95 1.0 1.07 1.42 1.45 1.88 1.78 Salt: 99+% Pure Sodium Chloride Sugar: 98+% Pure Sucrose Water: De-ionized, 16 M+ resistivity HEC: Hydroxyethyl Cellulose DGBE: 99+% Di(ethylene glycol) butyl ether, [2-(2-butoxyethoxy)ethanol] Triton X-100 (ultra pure): Polyethylene glycol mono [4-(1,1, 3, 3-tetramethylbutyl)phenyl]ether Simulating Liquids for 5 GHz, Manufactured by SPEAG Ingredients (% by weight) Water 78 Mineral oil 11 Emulsifiers 9 Additives and Salt 2 11.2. Tissue Dielectric Parameter Check Results The temperature of the tissue-equivalent medium used during measurement must also be within 18C to 25C and within ± 2C of the temperature when the tissue parameters are characterized. The dielectric parameters must be measured before the tissue-equivalent medium is used in a series of SAR measurements. The parameters should be re-measured after each 3 – 4 days of use; or earlier if the dielectric parameters can become out of tolerance; for example, when the parameters are marginal at the beginning of the measurement series. Tissue dielectric parameters were measured at the low, middle and high frequency of each operating frequency range of the test device. Date Freq. (MHz) Liquid Parameters Measured Target Delta (%) Limit ±(%) e' 37.6800 Relative Permittivity (єr): 37.68 39.20 -3.88 5 Head 2450 e" 13.8300 Conductivity (σ): 1.88 1.80 4.67 5 e' 37.8300 Relative Permittivity (єr): 37.83 39.28 -3.69 5 3/25/2013 Head 2410 e" 13.7000 Conductivity (σ): 1.84 1.76 4.28 5 e' 37.5500 Relative Permittivity (єr): 37.55 39.17 -4.13 5 Head 2475 e" 13.8500 Conductivity (σ): 1.91 1.83 4.32 5 Page 19 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 12. System Performance Check SAR system verification is required to confirm measurement accuracy, according to the tissue dielectric media, probe calibration points and other system operating parameters required for measuring the SAR of a test device. The system verification must be performed for each frequency band and within the valid range of each probe calibration point required for testing the device. The same SAR probe(s) and tissue-equivalent media combinations used with each specific SAR system for system verification must be used for device testing. When multiple probe calibration points are required to cover substantially large transmission bands, independent system verifications are required for each probe calibration point. A system verification must be performed before each series of SAR measurements using the same probe calibration point and tissue-equivalent medium. Additional system verification should be considered according to the conditions of the tissue-equivalent medium and measured tissue dielectric parameters, typically every three to four days when the liquid parameters are remeasured or sooner when marginal liquid parameters are used at the beginning of a series of measurements. 12.1. System Performance Check Measurement Conditions  The measurements were performed in the flat section of the TWIN SAM or ELI phantom, shell thickness: 2.0 ±0.2 mm (bottom plate) filled with Body or Head simulating liquid of the following parameters.  The depth of tissue-equivalent liquid in a phantom must be ≥ 15.0 cm ± 0.5 cm for SAR measurements ≤ 3 GHz and ≥ 10.0 cm ± 0.5 cm for measurements > 3 GHz.  The DASY system with an E-Field Probe was used for the measurements.  The dipole was mounted on the small tripod so that the dipole feed point was positioned below the center marking of the flat phantom section and the dipole was oriented parallel to the body axis (the long side of the phantom). The standard measuring distance was 10 mm (above 1 GHz) and 15 mm (below 1 GHz) from dipole center to the simulating liquid surface.  The coarse grid with a grid spacing of 15 mm was aligned with the dipole. For 5 GHz band - The coarse grid with a grid spacing of 10 mm was aligned with the dipole.  Special 7x7x7 (below 3 GHz) and/or 8x8x7 (above 3 GHz) fine cube was chosen for the cube.  Distance between probe sensors and phantom surface was set to 3 mm. For 5 GHz band - Distance between probe sensors and phantom surface was set to 2.5 mm  The dipole input power (forward power) was 100 mW.  The results are normalized to 1 W input power. 12.2. Reference SAR Values for System Performance Check The reference SAR values can be obtained from the calibration certificate of system validation dipoles Target SAR Values (mW/g) System Dipole Serial No. Cal. Date Freq. (MHz) 1g/10g Head Body 1g 53.6 51.7 D2450V2 899 10/05/12 2450 10g 25.0 24.3 12.3. System Performance Check Results The 1-g and 10-g SAR measured with a reference dipole, using the required tissue-equivalent medium at the test frequency, must be within 10% of the manufacturer calibrated dipole SAR target. System Dipole Measured Results Target T.S. Delta Plot Date Tested Area Zoom Normalize (Ref. Type Serial # Liquid ±10 % No. Scan Scan to 1 W Value) 1g 53.10 52.20 52.2 53.6 -2.61 3/26/2013 D2450V2 899 Head 10g 23.30 23.80 23.8 25.0 -4.80 Page 20 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 13. SAR Test Results 13.1. Wi-Fi (2.4 GHz Band) Head SAR Power (dBm) 1-g SAR (W/kg) Test Dist. Freq. Plot Mode Ch #. Tune-up Note Position (mm) (MHz) Meas. Meas. Scaled No. limit 1 2412 Head side 802.11b 0 6 2437 15.0 15.0 0.600 0.600 of DUT 11 2462 1 2412 15.0 15.0 1.31 1.31 Ear side of 802.11b 0 6 2437 15.0 15.0 1.31 1.31 DUT 11 2462 15.0 15.0 1.42 1.42 1 Note(s): 1. According to KDB 447498, Testing of other required channels within the operating mode of a frequency band is not required when the reported 1-g or 10-g SAR for the mid-band or highest output power channel is ≤ 0.8 W/kg or 2.0 W/kg, for 1-g or 10-g respectively, when the transmission band is ≤ 100 MHz. Page 21 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 14. SAR Measurement Variability In accordance with published RF Exposure KDB procedure 865664 D01 SAR measurement 100 MHz to 6 GHz v01. These additional measurements are repeated after the completion of all measurements requiring the same head or body tissue-equivalent medium in a frequency band. The test device should be returned to ambient conditions (normal room temperature) with the battery fully charged before it is re-mounted on the device holder for the repeated measurement(s) to minimize any unexpected variations in the repeated results. 1) Repeated measurement is not required when the original highest measured SAR is < 0.80 W/kg; steps 2) through 4) do not apply. 2) When the original highest measured SAR is ≥ 0.80 W/kg, repeat that measurement once. 3) Perform a second repeated measurement only if the ratio of largest to smallest SAR for the original and first repeated measurements is > 1.20 or when the original or repeated measurement is ≥ 1.45 W/kg (~ 10% from the 1-g SAR limit). 4) Perform a third repeated measurement only if the original, first or second repeated measurement is ≥1.5 W/kg and the ratio of largest to smallest SAR for the original, first and second repeated measurements is > 1.20. 14.1. The Highest Measured SAR Configuration in Each Frequency Band Head Exposure Condition Test Configuration Meas. SAR (W/kg) Largest to Wireless Freq. Mode Ch #. Smallest Note Technologies Exposure Position (MHz) Original Repeated SAR Ratio WiFi 802.11b Head Ear 11 2462.0 1.420 1.410 1.01 1 2.4 GHz 1Mbps Note(s): 1. Second Repeated Measurement is not required since the ratio of the largest to smallest SAR for the original and first repeated measurement is not > 1.20. Page 22 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 15. Standalone SAR Test Exclusion Based on the criteria for Standalone SAR test exclusion listed in Section 4.3.1. of KDB 447498 D01 General RF Exposure Guidance v05: [(max. power of channel, including tune-up tolerance, mW)/(min. test separation distance, mm)]·[√f(GHz)] ≤ 3.0, for 1-g SAR Max. Power of Channel Min. Test Spearation Distance Frequency Result (dBm) (mW) (mm) (GHz) 9.7 9 5 2.441 2.9 Conclusion: The computed value is < 3; therefore, Bluetooth qualifies for Standalone SAR test exclusion. 15.1. Estimated SAR As there is no simultaneous transmission the calculation of estimated SAR is not required Page 23 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.

Report No.: 13U14955-5A Issue Date: 4/15/2013 FCC ID: A4R-X1 16. Appendixes Refer to separated files for the following appendixes. 16.1. System Performance Check Plots 16.2. SAR Test Plots for WiFi 2.4 GHz Band 16.3. Calibration Certificate for E-Field Probe EX3DV4 - SN 3751 16.4. Calibration Certificate for D2450V2 - SN 899 Page 24 of 27 UL CCS FORM NO: CCSUP4031G 47173 BENICIA STREET, FREMONT, CA 94538, USA TEL: (510) 771-1000 FAX: (510) 661-0888 This report shall not be reproduced except in full, without the written approval of UL CCS.


Document Created: 2013-04-15 10:10:48
Document Modified: 2013-04-15 10:10:48
© 2024 FCC.report
This site is not affiliated with or endorsed by the FCC