SAR Caldata

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RF Exposure Info

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CETECOM ICT Services GmbH Untertuerkheimer Str. 6-10, 66117 Saarbruecken, Germany Phone: +49 (0) 681 598-0 Fax: -8475 SAR-Laboratory Phone: +49 (0) 681 598-8454 . Accredited testing laboratory DAR registration number: DAT-P-176/94-D1 Federal Motor Transport Authority (KBA) DAR registration number: KBA-P 00070-97 Appendix to test report 1-0876-01-04/08 Calibration data, Phantom certificate and detail information of the DASY4 System As of 2008-11-13 Page 1 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 Table of Content 1 Calibration report “Probe ET3DV6”.................................................................................................................................... 3 2 Calibration report “1900 MHz System validation dipole” ................................................................................................. 12 3 Calibration certificate of Data Aquisition Unit (DAE) ...................................................................................................... 21 4 Certificate of “SAM Twin Phantom V4.0/V4.0C” ........................................................................................................... 22 5 Application Note System Performance Check ................................................................................................................... 24 2008-11-13 As of 2008-11-13 Page 2 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 1 Calibration report “Probe ET3DV6” As of 2008-11-13 Page 3 of 29

CETECOM* Calibration Laboratory of Schwatzerisctr Kaibrientienst Schmid & Partner Service sulsse sitelonnage Engineering AG Servalo ustzzone d tarmturs Zoughausstratse 43, 8004 zurien, Suzarand Swizs Caliration Servicn Acorediec y the Sitss Acerediaion Servics (BA8) Acerediation No.: SGS 108 The Swise Aceredtafion Sorvieo is ono ofthe signatories to the EA WutilsteraAgreement for the recognlton of cabratlon certleates Glossary: TSL tissue simulating liquid NORMixy,z sensitivity in free space ConvF sensitivity in TSL / NORMy,z DCP diode compression point Polarization q @ ratation around probe axis Polarization 8 8 rotation around an axis that is in the plane normal to probe axis (at measurement center), Le., 5 = 0 is normal to probe axis Calibration is Performed According to the Following Standards: a) IEEE Sid 1528—2003, "IEEE Recommended Practice for Determining the Peak Spatial~ Averaged Specific Absarption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques®, December 2003 b} 1EC 62209—1, *Procedure to measure the Specific Absorption Rate (SAR) for hand—held devices used in close proximily to the ear (frequency range of 300 MHz to 3 GHz)‘, February 2005 Methods Applied and Interpretation of Paramsters: * NORMxy.z: Assessed for E—field polarizsion 8 0 (f < 900 MHz in TEM—cell; f> 1800 MHz: R22 waveguide}. NORMx.y.z are only intermediate values, L.e., the uncertainties of NORKx,y,z does not effect the E"—field uncertainty inside TSL (see below ConvF). * NORM(fxy.z = NORMx.y,z * frequency_response (see Frequency Response Chart). This linearization is implemented in DASY4 software versions later than 4.2, The uncertainty of the frequency response is included in the stated uncertainty of ConvF, «— DCPxy,z: DCP are numerical linearization parameters assessed based on the data of power sweep (no uncertainty required). DCP does not depend on frequency nor media. «_ ConvF and Boundary Effect Parameters: Assessed in flat phantom using E—field (or Temperature Transfer Standard for f < 800 MHz) and inside waveguide using analytical field distributions based on power measurements forf> 800 MHz. The same setups are used for assessment of the parameters applied for boundary compansation (alpha, depth) of which typical uncertainty values are given. These parameters are used in DASY4 software to improve probe accuracy clase to the boundary. The sensitivity in TSL corresponds to NORMxy,z " ConvF whereby the uncertainty corresponds to that given for ConvF, A frequency dependent Convi~ is used in DASY version 4.4 and higher which allows extending the validity from : 50 MHz to x 100 MHz. * Spherical isotropy (3D deviation from isofropy); in a field of low gradients reallzed using a fat phantom exposed by a patch anterina. =— Sensor Offset. The sensor offset correspondsto the offset of virtual measurement center from the probe tip (on probe axis}. No tole—ance required Gertate No: ET3—1580_Augo8 Page 2 or9

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 5 of 29

CETECOM* ET3DV6 SN:1558 August 15, 2008 DASY — Parameters of Probe: ET3DV6 SN:1558 Sensilivity in Free Space® Diede Compression® NormX 203 s 10.1% wViVim)® DCP x 93 m Norm¥Y 188 a101% wV/tVim® per y 92 mV NormZ 170 at0t% pVi(imY® PCP Z 95 m Sensitivity in Tissue Simulating Liquid (Conversion Factors) Please seo Page 8. Boundary Effect TsL 900 NHz Typlcal SAR gradient5% per mm Sensor Center to Phentorn Suface Dislance 3.7 mm 4. tim $ARe Without Correction Algorithm 108 B4 SAR[%) With Corection Algorithm o8 04 TSE 1750 mz Typleal SA gradient: 10 % per rim Sensor Canter to Phantom Surtace Distance 37 mm 4.7 mm SARs, (%) Without Correction Algorthm 10. 61 SAR, (%) With Correction Algorithm oa o6 Sensor Offset Probe Tipto Sensor Center 2.7 mm (The raported uncertainty of measurement is stated as the standard uncertainty of measurementmultiplied by the coverage factor k=2, which for a normal distribution (corresponds to a coverage probability of approximately 95%. A Thuncariinia o Nerm2CY.2 d t afat the E—hld unceralny ieade T9L {seo Page 0) * Nameres!Insaieatonpammetor unsedainy not romures Gerifcate No: Er3—1658_Auso8 Poge 4 o9

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 7 of 29

CETECOM* ETSDVS SN:155§ August 15, 2008 Receiving Pattern (¢), 8 = 0° s T= 1800 MHz, WG R22 | pososs ce—x ~e—y <e—z —e—fat fZTLEL M | _E a|I 51— mm 06 + ‘ + —3— 30 MHz g ®8 | ofei~<] |—m— 100 We & 4* 11 gpe t —+— 0o k g‘g "HMes a | ag | m 1800 hi) 5& ne | | | —a—2500 hiz | «6 | lt 7 1 3 A4 1 —H — ul ! —. : 0 s 120 180 240 a0o Uncertainty of Axtal Isotropy Assessment: £ 0.5% (k=Z) Gortficate No: ET9—1058_Augos Page 6 ato

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 9 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 10 of 29

CETECOM* ETSDV6 SN:1558 August 15, 2008 Deviation from Isotropy in HSL Error (4, 8), f= 900 MHz Ervor IdB] |m—1ac—080moso—oms mant.s40 maac—o20 m—s 20003 momaz memoso me«ooso mossoso mem it Uncertainty of Spherical Isotrapy Assessment:#2.6% (K=2) Conicata No: ET3—165¢ Aug0 Page 0 of0

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 2 Calibration report “1900 MHz System validation dipole” As of 2008-11-13 Page 12 of 29

CETECOM* Calibration Laboratory of § SottwelzerisehorKaliberdionst Schmid & Partner g Sorvie sulese @itslonnage Engineering AG Serviio suirzero i tereture Zoughausstrasse 43 4004 2urich, Suizarand 5. sutss Caltration Sarvice Jormdted by the Sutes Acstacitaion Sanice (EAS) Accredtation no: SCS 108 The Swrise Accredtatlon Service Is one of the signatories o the EA Multiaterat Agreementfor the resounition of ealiration cerihcate Glossary: TSL tissue simulating liquid ConvE n TSL / NORM xy.z N/A icable or not measured Callbration is Performed Accerding to the Following Standards: a) IEEE Std 1528—2003, "IEEE Recommended Practice for Determining the Poak Spatial— Averaged Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques®, December 2003 6 CENELEC &N 50361, "Basic standard for the measurement of Specific Absorption Rate related to human exposure to electromagnetic fields from mobile phones (300 MHz — 3 GHz), July 2001 c) Federal Communications Commission Office of Engineering & Technology (FCC OET), "Evaluating Compliance with ECC Guidelines for Human Exposure to Rediofrequency Electromagnetic Fields; Additional Information for Evaluating Compliance of Mobile and Portable Devices with FCC Limits for Human Exposure to Rediafrequency Emissions‘, Supplement C (Edition 01—01) to Bulletin 65 Additional Documentation: d) DASY4/5 System Handbook Methods Applied and Interpretation of Paramoters: * Measurement Conditions: Further details are available from the Validation Report at the end of the certificate. All figures stated in the cortificate are valid at the frequency indicated. * Antenna Parameters with TSL: The dipole is mounted with the spacer to position its feed point exactly below the center marking of the flat phantom section, with the arms oriented parallel to the body axis. * Feed Point Impedance and Return Loss: These parameters are measured with thedipole positioned under the liquid filled phantom. The impedance stated is transformed from the measurement at the SMA connector to the feed point. The Return Loss ensures low reflected power. No uncertainty required. «_ Electrical Defay: One—way delay between the SMA connector and the antenna feed point. No uncertainty required. _ SAR measured: SAR measured at the stated antenna input power * SAR normalized: SAR as measured, normalized to an input power of 1 W at the antenna connector * SAR for nominal TSL parameters: The measured TSL paramefers are used to calculate the nominal SAR result. Gertficate No: D1200V7—531_May0A Page 2 of 9

CETECOM* Measurement Conditions DASY system confiquretion, as faras naot gven on page 1. DASY version provs var Extrapolation Advanced Extragolation Phantom Noduler Flat Phantom ¥5.0 Distance Dipole Genter» TSL 10 m wih Spacer Zoom Scan Resolution dsoy, oz = 8 mm [ Frequency 1900 MHz+ 1 NKz Head TSL parameters The falowing gerematers and oaloulaions ware appled. Tempornture Permitivity Conductivity Nominal Hoad TSL p-ramct;; — 220°C 40.0 140 mhoim Measured Haed TSL prrametars (22.020.2) °C 30426 % _’\:b mho/l;\ i-fi % Hoad TSL temporatura during tast @rczo2)‘C — SAR result with Hoad TSL SAR averaged over 1 om(1 5)of Head TBL condiion ] SAR mensured 250 mW inout power 847 mWw‘ g SAR nommalized nomalzed to 1W 357 mW g SAR for nominal Head TSL paremeters ‘ normalied to 1W — 37.8 MWV a247.0 % (ke2) SAR averaged over 10 em(10 5) of Head ToL. Conditon SAR measured 250 mW inout power 5.00 mw7g SAR nommalized normalied o 1W 20.0 mW!q SAR for nominal Head TSL paremators no;mahzed to 1W 1927 mW 1 q 2 16.5 % (ke2) ! Comection to nominal TBL parameters according to d}. chapler ‘SAR Sensiivites" Cerifeate No: D1900V2—531_Meyo® Page 3 oft

cErecom" Body TSL parameters The following parameters and calculations were appled Temperature Permittivity Gondiustivity Nominal Body TSL parameters 220°C sas 182 mhoim Measured Body TSL. narameters @20202)°C 52026 % 1.654 mhoim#6 % Body TSL temparnture during test cosso2)°C — SAR result with Body TSL SAR averaged over 1 em" (1 g) of Body TSL Gondition SAR measured 250 mW input power 9.78 mW / a SAR nommalzed normalized to 1W 304 mW g SAR for nminal Body TL parameters * _______| _ normalized to 1W 38.3 mW ! o # 17.0 % ( _ SAR avaraged over 10 om" (10 ) of Bocy TSL. conition SAR messured 250 n Input power 5.13 mW/g SAR nomnalized nomalized to 1W 20.5 mW/3 SAR for nominal Body TEL peremeters * nomalized to 1W 20.2 mW [ g 2 16.5 % (k=2) * Correion to nomina! TSL paramaters acoording to 0}, chapter BAR Sensitvties® Cortficata No: D1900v2—531_Maya Page 4 o19

CETECOM* Appondix Anterna Parameters with Head TSL [ impedance, transformed to feed point seon+s7in | Return Loss +24.6 cB Antenna Parameters with Body TSL impedance, transformed to feeel point «s2n+s3im Rowm Lose —24.0 48 General Antenna Parameters and Design Eleetrcal Delay (one direction) 1201 ns After long term use with 100W radiated power, only a slight warming of Ihe dipole nearthe taedpoint can be measured The dipols is mads of standard semirigid coxial cable. The center conductor of the fosing ini direcily connected to the second arm of the dipale. The antenna is therefare short—sroulted for DC—signols. No excessive force mus be applied to the dipole arms, because they might bend or the soidered connections near the feecpoint may be camaged Additional EUT Data Manufactured by sreao Manufactured on January 24, 2001 Certficate No: D1900V7—531_Mayo6 Page 5 ofa

C CETECOM* DASY4 Validation Report for Head TSL Date/Time: 08.05.2008 14:26:07 Test Laboratory: SPEAG, Zurich, Switzerland DUT: Dipole 1900 MHz; Type: D1900V2; Serial; D1900V2 — SN:631 Communication System: CW; Frequency: 1900 MHz;Duty Cycle: 1:1 Medium: HSL U10 BB; Medium parameters used: f= 1900 MHz: 0 = 1.44 mhorm; £, = 39.4; p = 1000 kg/m‘ Phantom section: Flat Section Measurement Standard: DASY4 (High Precision Assessmant) DASY4 Configuration: * Probe: ESSDVZ — SN3025; ComvR(4.0, 4.9, 4.9}; Calbraled; 28.04.2006 +. Sensor—Surtace: 3.4mm (Mechanical Surtace Detection) + Electronics: DAE4 Sn601; Calbrated: 14.09.2008 * Phantom: Flat Phantom 5.0 (front); Type: GDO0ORSOAA;; + Measuremant SW: DASY4, ¥4.7 Build 55; Postprocessing SW SEMCAD, V1.8 Buld 172 Pin = 250 mW; d = 10 mm/Zoom Scan (7x7x7)/Cube 0: Measurement giid: dx=5mm, dy=5mm, dz=5mm Reference Value =90.1 Vim; Power Drift =0.030 d8 Peak SAR (extrapalated) = 17.9 Wikg SAR(1 g) = 9.67 mWig; SAR(10 g) = 5 mWig Maximum value of SAR (measured) =11 4 mWig da 0.000 +10.9 "14.5 "18.1 0dB= 14mWlg Corfcale No: D1900V2—531_MayO® Page 6 of$

''''' CETECOM* Impedance Measurement Plot for Head TSL a my awes seraorce EBJ sn a uie ®sasize assire ssussph 1.800,000 so0 rets t Hankers asaus ces a 1.s080e on C#2 nankers amasses ce ae0000 ane Certiicate No: D1900V2.—531_May8 Page 7 08

CETECOM* DASY4 Validation Report for Bodly TSL Date/Time: 14.05.2008 16:36:27 Test Laboratory: SPEAG, Zurich, Switzerland DUT: Dipole 1900 MHz; Type: D1900V2; Serial: D1900V2 — SN:531 Communication System: CW; Frequency: 1800 MHz;Duty Cycie: 1:1 Medium: MSL U1O BB; Medium parameters used: f = 1900 MHz; 0 = 1.54 mhoim; £. = 52.2; p = 1000 kg/m® Phantom section: Flat Section Measurement Standard: DASY4 (High Precision Assessment) DASY4 Configuration: + Probe: ES3DV2— SN3026; ComF(4.5, 4.5, 4.5}; Callbrated: 28.08.2008 * Sensor—Surfacs: 3.4mm (Machanical Surface Detection) * Electronics: DAE4 Sn801; Callbrated: 14.09.2008 * Fhantom: Flat Phaniam 5.0 (back}; Type: QDOOOPSOAA;; + Measurement SW: DASY4, V4.7 Buld 71; Postprocessing SW: SEMCAD, V1.8 Buld 184 Pin = 250 mW; = 10 mmiZoom Scan (7x7x7)/Cube 0: Measurement grid: dx=&mm, dy=&mm, dz=&mm Reference Value = 90.1 V/m; PowerDrift=0.011 dB Peak SAR (extrapolated) = 17.4 W/kg SAR(1 g) = 9.78 mWig; SAR(10 g} = 5.13 mWig Maximum value of SAR (measured) = 11.8 mWig «n 0.008 420 240 ana 186 00B =11.8mWiq Gertficate No: D1900V2—531_May08 Page 8 or0

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 20 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 3 Calibration certificate of Data Aquisition Unit (DAE) As of 2008-11-13 Page 21 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 4 Certificate of “SAM Twin Phantom V4.0/V4.0C” As of 2008-11-13 Page 22 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 As of 2008-11-13 Page 23 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 5 Application Note System Performance Check 5.1.1.1 Purpose of system performance check The system performance check verifies that the system operates within its specifica-tions. System and operator errors can be detected and corrected. It is recommended that the system performance check is performed prior to any usage of the system in order to guarantee reproducible results. The measurement of the Specific Absorption Rate (SAR) is a complicated task and the result depends on the proper functioning of many components and the correct settings of many param-eters. Faulty results due to drift, failures or incorrect parameters might not be recognized, since they often look similar in distribution to the correct ones. The Dosimetric Assessment System DASY4 incorporates a system performance check procedure to test the proper functioning of the system. The system performance check uses normal SAR measurements in a simplified setup (the at section of the SAM Twin Phantom) with a well characterized source (a matched dipole at a specified distance). This setup was selected to give a high sensitivity to all parameters that might fail or vary over time (e.g., probe, liquid parameters, and software settings) and a low sensitivity to external effects inherent in the system (e.g., positioning uncertainty of the device holder). The system performance check does not replace the calibration of the components. The accuracy of the system performance check is not sufficient for calibration purposes. It is possible to calculate the field quite accurately in this simple setup; however, due to the open field situation some factors (e.g., laboratory re ections) cannot be accounted for. Calibrations in the at phantom are possible with transfer calibration methods, using either temperature probes or calibrated E-field probes. The system performance check also does not test the system performance for arbitrary field sit-uations encountered during real measurements of mobile phones. These checks are performed at SPEAG by testing the components under various conditions (e.g., spherical isotropy measurements in liquid, linearity measurements, temperature variations, etc.), the results of which are used for an error estimation of the system. The system performance check will indicate situations where the system uncertainty is exceeded due to drift or failure. 5.1.1.2 System Performance check procedure Preparation The conductivity should be measured before the validation and the measured liquid parameters must be entered in the software. If the measured values differ from targeted values in the dipole document, the liquid composition should be adjusted. If the validation is performed with slightly different (measured) liquid parameters, the expected SAR will also be different. See the application note about SAR sensitivities for an estimate of possible SAR deviations. Note that the liquid parameters are temperature dependent with approximately – 0.5% decrease in permitivity and + 1% increase in conductivity for a temperature decrease of 1° C. The dipole must be placed beneath the flat phantom section of the Generic Twin Phantom with the correct distance holder in place. The distance holder should touch the phantom surface with a light pressure at the reference marking (little hole) and be oriented parallel to the long side of the phantom. Accurate positioning is not necessary, since the system will search for the peak SAR location, except that the dipole arms should be parallel to the surface. The device holder for mobile phones can be left in place but should be rotated away from the dipole. The forward power into the dipole at the dipole SMA connector should be determined as accurately as possible. See section 4 for a description of the recommended setup to measure the dipole input power. The actual dipole input power level can be between 20mW and several watts. The result can later be normalized to any power level. It is strongly recommended to note the actually used power level in the „comment“-window of the measurement file; otherwise you loose this crucial information for later reference. System Performance Check The DASY4 installation includes predefined files with recommended procedures for measurements and validation. They are read-only document files and destined as fully defined but unmeasured masks, so you must save the finished validation under a different name. The validation document requires the Generic Twin Phantom, so this phantom must be properly installed in your system. (You can create your own measurement procedures by opening a new document or editing an existing document file). Before you start the validation, you just have to tell the system with which components (probe, medium, and device) you are performing the validation; the system will take care of all parameters. After the validation, which will take about 20 minutes, the results of each task are As of 2008-11-13 Page 24 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 displayed in the document window. Selecting all measured tasks and opening the predefined “validation” graphic format displays all necessary information for validation. A description of the different measurement tasks in the predefined document is given below, together with the information that can be deduced from their results: • The „reference“ and „drift“ measurements are located at the beginning and end of the batch process. They measure the field drift at one single point in the liquid over the complete procedure. The indicated drift is mainly the variation of the amplifier output power. If it is too high (above ± 0.1dB) the validation should be repeated; some amplifiers have very high drift during warm-up. A stable amplifier gives drift results in the DASY4 system below ± 0.02 dB. • The „surface check“ measurement tests the optical surface detection system of the DASY4 system by repeatedly detecting the surface with the optical and mechanical surface detector and comparing the results. The output gives the detecting heights of both systems, the difference between the two systems and the standard deviation of the detection repeatability. Air bubbles or refraction in the liquid due to separation of the sugar-water mixture gives poor repeatability (above ± 0.1mm). In that case it is better to abort the validation and stir the liquid. The difference between the optical surface detection and the actual surface depends on the probe and is specified with each probe. (It does not depend on the surface reflectivity or the probe angle to the surface within ± 30°.) However, varying breaking indices of different liquid compositions might also influence the distance. If the indicated difference varies from the actual setting, the probe parameter „optical surface distance“ should be changed in the probe settings (see manual). For more information see the application note about SAR evaluation. • The „area scan“ measures the SAR above the dipole on a parallel plane to the surface. It is used to locate the approximate location of the peak SAR with 2D spline interpolation. The proposed scan uses large grid spacing for faster measurement; due to the symmetric field the peak detection is reliable. If a finer graphic is desired, the grid spacing can be reduced. Grid spacing and orientation have no influence on the SAR result. • The zoom scan job measures the field in a volume around the peak SAR value assessed in the previous „area“ scan (for more information see the application note on SAR evaluation). If the validation measurements give reasonable results, the peak 1g and 10g spatial SAR values averaged between the two cubes and normalized to 1W dipole input power give the reference data for comparisons. The next section analyzes the expected uncertainties of these values. Section 6 describes some additional checks for further information or troubleshooting. 5.1.1.3 Uncertainty Budget Please note that in the following Tables, the tolerance of the following uncertainty components depends on the actual equipment and setup at the user location and need to be either assessed or verified on-site by the end user of the DASY4 system: • RF ambient conditions • Dipole Axis to Liquid Distance • Input power and SAR drift measurement • Liquid permittivity - measurement uncertainty • Liquid conductivity - measurement uncertainty Note: All errors are given in percent of SAR, so 0.1 dB corresponds to 2.3%. The field error would be half of that. the liquid parameter assessment give the targeted values from the dipole document. All errors are given in percent of SAR, so 0.1dB corresponds to 2.3%. The field error would be half of that. As of 2008-11-13 Page 25 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 System validation In the table below, the system validation uncertainty with respect to the analytically assessed SAR value of a dipole source as given in the P1528 standard is given. This uncertainty is smaller than the expected uncertainty for mobile phone measurements due to the simplified setup and the symmetric field distribution. Error Sources Uncertainty Probability Divi- ci ci Standard Standard vi2 or Value Distribution sor Uncertainty Uncertainty veff 1g 10g Measurement System Probe calibration ± 4.8% Normal 1 1 1 ± 4.8% ± 4.8% ∞ Axial isotropy ± 4.7% Rectangular √3 0.7 0.7 ± 1.9% ± 1.9% ∞ Hemispherical isotropy ± 0.0% Rectangular √3 0.7 0.7 ± 0.0% ± 0.0% ∞ Boundary effects ± 1.0% Rectangular √3 1 1 ± 0.6% ± 0.6% ∞ Probe linearity ± 4.7% Rectangular √3 1 1 ± 2.7% ± 2.7% ∞ System detection limits ± 1.0% Rectangular √3 1 1 ± 0.6% ± 0.6% ∞ Readout electronics ± 1.0% Normal 1 1 1 ± 1.0% ± 1.0% ∞ Response time ± 0.0% Rectangular √3 1 1 ± 0.0% ± 0.0% ∞ Integration time ± 0.0% Rectangular √3 1 1 ± 0.0% ± 0.0% ∞ RF ambient conditions ± 3.0% Rectangular √3 1 1 ± 1.7% ± 1.7% ∞ Probe positioner ± 0.4% Rectangular √3 1 1 ± 0.2% ± 0.2% ∞ Probe positioning ± 2.9% Rectangular √3 1 1 ± 1.7% ± 1.7% ∞ Max. SAR evaluation ± 1.0% Rectangular √3 1 1 ± 0.6% ± 0.6% ∞ Dipole Dipole axis toliquid distance ± 2.0% Normal 1 1 1 ± 1.2% ± 1.2% ∞ Input power and power drift ± 4.7% Rectangular √3 1 1 ± 2.7% ± 2.7% ∞ Phantom and Set-up Phantom uncertainty ± 4.0% Rectangular √3 1 1 ± 2.3% ± 2.3% ∞ Liquid conductivity (target) ± 5.0% Rectangular √3 0.64 0.43 ± 1.8% ± 1.2% ∞ Liquid conductivity (meas.) ± 2.5% Rectangular 1 0.64 0.43 ± 1.6% ± 1.1% ∞ Liquid permittivity (target) ± 5.0% Rectangular √3 0.6 0.49 ± 1.7% ± 1.4% ∞ Liquid permittivity (meas.) ± 2.5% Rectangular 1 0.6 0.49 ± 1.5% ± 1.2% ∞ Combined Uncertainty ± 8.4% ± 8.1% ∞ Expanded Std. Uncertainty ± 16.8% ± 1.2% As of 2008-11-13 Page 26 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 Performance check repeatability The repeatability check of the validation is insensitive to external effects and gives an indication of the variations in the DASY4 measurement system, provided that the same power reading setup is used for all validations. The repeatability estimate is given in the following table: Error Sources Uncertainty Probability Divi- ci ci Standard Standard vi2 or Value Distribution sor Uncertainty Uncertainty veff 1g 10g Measurement System Probe calibration ± 4.8% Normal 1 1 1 0 0 ∞ Axial isotropy ± 4.7% Rectangular √3 0.7 0.7 0 0 ∞ Hemispherical isotropy ± 0.0% Rectangular √3 0.7 0.7 0 0 ∞ Boundary effects ± 1.0% Rectangular √3 1 1 0 0 ∞ Probe linearity ± 4.7% Rectangular √3 1 1 0 0 ∞ System detection limits ± 1.0% Rectangular √3 1 1 0 0 ∞ Readout electronics ± 1.0% Normal 1 1 1 0 0 ∞ Response time ± 0.0% Rectangular √3 1 1 0 0 ∞ Integration time ± 0.0% Rectangular √3 1 1 0 0 ∞ RF ambient conditions ± 3.0% Rectangular √3 1 1 0 0 ∞ Probe positioner ± 0.4% Rectangular √3 1 1 0 0 ∞ Probe positioning ± 2.9% Rectangular √3 1 1 0 0 ∞ Max. SAR evaluation ± 1.0% Rectangular √3 1 1 0 0 ∞ Dipole Dipole axis toliquid distance ± 2.0% Normal 1 1 1 ± 1.2% ± 1.2% ∞ Input power and power drift ± 4.7% Rectangular √3 1 1 ± 2.7% ± 2.7% ∞ Phantom and Set-up Phantom uncertainty ± 4.0% Rectangular √3 1 1 ± 2.3% ± 2.3% ∞ Liquid conductivity (target) ± 5.0% Rectangular √3 0.64 0.43 ± 1.8% ± 1.2% ∞ Liquid conductivity (meas.) ± 2.5% Rectangular 1 0.64 0.43 ± 1.6% ± 1.1% ∞ Liquid permittivity (target) ± 5.0% Rectangular √3 0.6 0.49 ± 1.7% ± 1.4% ∞ Liquid permittivity (meas.) ± 2.5% Rectangular 1 0.6 0.49 ± 1.5% ± 1.2% ∞ Combined Uncertainty ± 5.3% ± 4.9% ∞ Expanded Std. Uncertainty ± 10.6% ± 9.7% The expected repeatability deviation is low. Excessive drift (e.g., drift in liquid parameters), partial system failures or incorrect parameter settings (e.g., wrong probe or device settings) will lead to unexpectedly high repeatability deviations. The repeatability gives an indication that the system operates within its initial specifications. Excessive drift, system failure and operator errors are easily detected. As of 2008-11-13 Page 27 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 5.1.1.4 Power set-up for validation The uncertainty of the dipole input power is a significant contribution to the absolute uncertainty and the expected deviation in interlaboratory comparisons. The values in Section 2 for a typical and a sophisticated setup are just average values. Refer to the manual of the power meter and the detector head for the evaluation of the uncertainty in your system. The uncertainty also depends on the source matching and the general setup. Below follows the description of a recommended setup and procedures to increase the accuracy of the power reading: The figure shows the recommended setup. The PM1 (incl. Att1) measures the forward power at the location of the validation dipole connector. The signal generator is adjusted for the desired forward power at the dipole connector and the power meter PM2 is read at that level. After connecting the cable to the dipole, the signal generator is readjusted for the same reading at power meter PM2. If the signal generator does not allow a setting in 0.01dB steps, the remaining difference at PM2 must be noted and considered in the normalization of the validation results. The requirements for the components are: • The signal generator and amplifier should be stable (after warm-up). The forward power to the dipole should be above 10mW to avoid the influence of measurement noise. If the signal generator can deliver 15dBm or more, an amplifier is not necessary. Some high power amplifiers should not be operated at a level far below their maximum output power level (e.g. a 100W power amplifier operated at 250mW output can be quite noisy). An attenuator between the signal generator and amplifier is recommended to protect the amplifier input. • The low pass filter after the amplifier reduces the effect of harmonics and noise from the amplifier. For most amplifiers in normal operation the filter is not necessary. • The attenuator after the amplifier improves the source matching and the accuracy of the power head. (See power meter manual.) It can also be used also to make the amplifier operate at its optimal output level for noise and stability. In a setup without directional coupler, this attenuator should be at least 10dB. • The directional coupler (recommended ³ 20dB) is used to monitor the forward power and adjust the signal generator output for constant forward power. A medium quality coupler is sufficient because the loads (dipole and power head) are well matched. (If the setup is used for reflective loads, a high quality coupler with respect to directivity and output matching is necessary to avoid additional errors.) • The power meter PM2 should have a low drift and a resolution of 0.01dBm, but otherwise its accuracy has no impact on the power setting. Calibration is not required. • The cable between the coupler and dipole must be of high quality, without large attenuation and phase changes when it is moved. Otherwise, the power meter head PM1 should be brought to the location of the dipole for measuring. • The power meter PM1 and attenuator Att1 must be high quality components. They should be calibrated, preferably together. The attenuator (³10dB) improves the accuracy of the power reading. (Some higher power As of 2008-11-13 Page 28 of 29

CETECOM ICT Services GmbH Calibration Data and Phantom Information to test report no.: 1-0876-01-04/08 heads come with a built-in calibrated attenuator.) The exact attenuation of the attenuator at the frequency used must be known; many attenuators are up to 0.2dB off from the specified value. • Use the same power level for the power setup with power meter PM1 as for the actual measurement to avoid linearity and range switching errors in the power meter PM2. If the validation is performed at various power levels, do the power setting procedure at each level. • The dipole must be connected directly to the cable at location “X”. If the power meter has a different connector system, use high quality couplers. Preferably, use the couplers at the attenuator Att1 and calibrate the attenuator with the coupler. • Always remember: We are measuring power, so 1% is equivalent to 0.04dB. 5.1.1.5 Laboratory reflections In near-field situations, the absorption is predominantly caused by induction effects from the magnetic near-field. The absorption from reflected fields in the laboratory is negligible. On the other hand, the magnetic field around the dipole depends on the currents and therefore on the feedpoint impedance. The feedpoint impedance of the dipole is mainly determined from the proximity of the absorbing phantom, but reflections in the laboratory can change the impedance slightly. A 1% increase in the real part of the feedpoint impedance will produce approximately a 1% decrease in the SAR for the same forward power. The possible influence of laboratory reflections should be investigated during installation. The validation setup is suitable for this check, since the validation is sensitive to laboratory reflections. The same tests can be performed with a mobile phone, but most phones are less sensitive to reflections due to the shorter distance to the phantom. The fastest way to check for reflection effects is to position the probe in the phantom above the feedpoint and start a continuous field measurement in the DASY4 multimeter window. Placing absorbers in front of possible reflectors (e.g. on the ground near the dipole or in front of a metallic robot socket) will reveal their influence immediately. A 10dB absorber (e.g. ferrite tiles or flat absorber mats) is probably sufficient, as the influence of the reflections is small anyway. If you place the absorber too near the dipole, the absorber itself will interact with the reactive near-field. Instead of measuring the SAR, it is also possible to monitor the dipole impedance with a network analyzer for reflection effects. The network analyzer must be calibrated at the SMA connector and the electrical delay (two times the forward delay in the dipole document) must be set in the NWA for comparisons with the reflection data in the dipole document. If the absorber has a significant influence on the results, the absorber should be left in place for validation or measurements. The reference data in the dipole document are produced in a low reflection environment. 5.1.1.6 Additional system checks While the validation gives a good check of the DASY4 system components, it does not include all parameters necessary for real phone measurements (e.g. device modulation or device positioning). For system validation (repeatability) or comparisons between laboratories a reference device can be useful. This can be any mobile phone with a stable output power (preferably a device whose output power can be set through the keyboard). For comparisons, the same device should be sent around, since the SAR variations between samples can be large. Several measurement possibilities in the DASY software allow additional tests of the performance of the DASY system and components. These tests can be useful to localize component failures: • The validation can be performed at different power levels to check the noise level or the correct compensation of the diode compression in the probe. • If a pulsed signal with high peak power levels is fed to the dipole, the performance of the diode compression compensation can be tested. The correct crest factor parameter in the DASY software must be set (see manual). The system should give the same SAR output for the same averaged input power. • The probe isotropy can be checked with a 1D-probe rotation scan above the feedpoint. The automatic probe alignment procedure must be passed through for accurate probe rotation movements (optional DASY4 feature with a robot-mounted light beam unit). Otherwise the probe tip might move on a small circle during rotation, producing some additional isotropy errors in gradient fields. As of 2008-11-13 Page 29 of 29


Document Created: 2009-01-07 12:15:07
Document Modified: 2009-01-07 12:15:07
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