RF Eposure Evaluation

FCC ID: WJ9-KSPHS8P

RF Exposure Info

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FCCID_4325169

KATHREIN KATHREN Sachsen Gni— Lndestrade > 0821 ons KATHREIN Sachsen GmbH Muehlau, 07.05.2019 Lindenstrae 3 09241 Mihla Germany Phone: +490 37226073 10 Fax +49 372260 73 24 1 RF Exposure and Transmitter Power info@athreinsachsen de wiw kathrein—sachsen de Considerations for the ARU 3570 Yourreference: s ECC ID: WJ9—ARU3560 ben The transmitter operation for the ARU 3570 covers the 902 — $28MHz operating band Yourleter: ies e ner un e Nactren anaugt (RF ID). The ARU 3570 supports one internal antenna and up to three external anten— nas but operates on only one antenna at a time. in addition, the ARU 3570 contains a Cellular module (FCC: WJS—KSPHSBP) that op— Our referen0#: Kckn Shr un Uras Zacien n ten erates in GSMB50 and GSM1900 frequency bands. The RF ID intenal antenna and the Cellular module antenna are in close proximity to each other. VAT Reg. No.: DE 140 915 677 The GSMB50 and GSM1900 do not transmit simultaneously Company headquarter: Mihlau HRB 2398 Chemniz The RF ID and Cellular module can transmit simultaneously. Managing diector(s) DanielSchcalda The following FCC Rule Parts and procedures are applicable: Bank detais: «_ Part 1.1310 — Radiofrequency radiation exposure limits * Part 21091 — Radiofrequency radiation exposure evaluation: mobile devices EUR—Accounts * KDB447498 DO1 v06 Mobile and Portable Devices RF Exposure Procedures Deutsche Bank Chemntz and Equipment Authorisation Policies iBAN: DEZ8 8707 0000 0263 7270 00 BIC: DEUTDESCXX MAXIMUM TRANSMITTER POWER CONSIDERATIONS Volsbank Chemnte Conducted power values are maximum average tune up with tolerance: iBAN: DEGD 8709 6214 0320 0014 47 BIC: GENODEFTCH RFID 915MHz: Spartasse Miteisachsen Transmitter power: iean: Deos B70s 2000 3545 0015 54 (Ref 15.247 (b)(4) — Antennas with gains >6dBi) BIC: Weranepirox 1) For external 13dBi gain antenna use, 304Bm max. power is reduced by 74B (13dBi — 6dB) EIRPmax = +23dBm + 13dBi antenna gain = +36dBm (3.98W) 2) For external 10dBi gain antenna use, 30dBm max. power is reduced by 40B (10dBi — 6dB) EIRPmax = +26dBm + 10dBi antenna gain = +36dBm (3.98W) 3) For external 8dBi gain antenna use, 30dBm max. power is reduced by 24B (8dBi — 6dB) EIRPmax = +28dBm + 8dBi antenna gain = +36dBm (3.98W) 4) For internal +7dBi gain antenna use, 30dBm max. poweris reduced by 10B (7dBi — 6dB) EIRPmax = +29dBm + 7dBi antenna gain = +36dBm (3.98W)

KATHREIN 5) For external 6dBi gain antenna use EIRPmax = +30dBm + 6dBi antenna gain = +36dBm (3.98W) Cellular GSMB50: Power conducted = 33.5dBm (2.24W) Antenna Gain: 3.90Bi EIRP = 37.4d4Bm = 5495.4mW Cellular GSM1900: Power conducted = 30.54Bm (1.12W) Antenna Gain: 2.5dBi EIRP = 33.0d4Bm = 1995.3mW

KATHREIN MPE CALCULATIONS The MPE calculation to calculate the safe operating distance for the user is. S = EIRP/MA4 t R" Where S = Power density EIRP = Effective Isotropic Radiated Power (EIRP = P x G) P = Conducted Transmitter Power G = Antenna Gain (relative to an isotropic radiator) R = distanceto the centre of radiation of the antenna (safe operating distance) RFID Power Density Requirement From table 1 (b) — Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for 2.4GHz Sreat = fi/1500 mWi/cm? = 902/1500 = 0.6 mWicm? Calculation: S = EIRP M t R* R=~ EIRP/4 ns R= 39817 (4 t x 0.6) R=\ 39817 (7.54) R=\ 527.98 R= 23¢m

KATHREIN Cellular: GSM850 (824MHz to 849MHz) Power Density Requirement From table 1 (b) — Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for GSMB50 Sreq2 = fuw,/1500 mWi/cm? = 824/1500 = 0.55 mWicm? Calculation: S = EIRP /4 t R* R=\ EIRP/4 6 R = v 5495.1/ (4 1t x 0.55) R= \ 5495.1/ (6.91) R=\795.24 R= 28.2cm Cellular: GSM1900 (1850MHz to 1910MHz) Power Density Requirement From table 1 (b) — Limits for General Population/ Uncontrolled Exposure of FCC Rule Part 1.1310 for GSM1900 Sreqs = 1.0 mW/cm* Calculation: S = EIRP /4 1t R* R=\ EIRP/4 ns R=v 1995.37 (4 tm x 1) R = v 1995.3/ (12.57) R=\ 158.74 R= 12.6cm Thereforeat a distance of 20cm, the power density of the GSM1900 transmission will be <1.

KATHREIN KDB 447498 D01 Section 7.2: SIMULTANEOUS TRANSMISSION CONSIDERATIONS For mobile exposure host platform devices to qualify for simultaneous transmission MPE test exclusion, all transmitters and antennas in the host must qualify for the standalone MPE test exclusion in KDB 447498 DO1, section 7.1. From KDB 447498 DO1, section7.1: "When a device qualifies for the categorical exclusion provision of § 2.1091(c), the minimum test separa— tion distance may be estimated, when applicable, by simple calculations according to plane—wave equiva— lent conditions, to ensure the transmitter andits antenna(s) can operate in manners that meet or exceed the estimated distance.®" The source—based time—averaged maximum radiated power, according to the maximum antenna gain, must be applied to calculate the field strength and power density required to es— tablish the minimum test separation distance." *‘ The type ofcalculations used to estimate minimum test separation distance for MPE complance must be appropriate fo the type of antenna(s) and exposure contions ovaluated " Therefore, a minimum test separation distance needs to be such that as per KDB 447498, the summa— tion of calculated MPE ratios for RFID + cellular is <1. Using an iterative process, 37cm is found to the optimum minimum separation distance that provides EMPE ratios <1.0 For RFID Calculation: S = 398154m R" S = 3081/(12.56 x 37°) S= 3981/(7238) S$1 = 0.231 mW/cm* For Cellular: GSM850 (824MHz to 849MHz) Calculation: S = 5495 4 m R S = 5495 /(12.56 x 37°) 5 = 5495 /(17203) S2= 0.319 mW/cm*

KATHREIN Therefore, EMPEratos = (S1) Sroq) + (S2) Sreqz) = (0.231/0.6) + (0.31970.55) =0.965 As the Z of MPE ratios <1.0 at a distance of 37cm, in accordance with KDB447498 Section 7.2, simulta— neoustransmission test exclusion applies for the transmitters. Conclusion The safe operating distance for the ARU 3570 for General Population/ Uncontrolled Exposure limits is: * A minimum of 23¢m when only the RFID is operational. * A minimum of 37¢m with simultaneous operationof the RFID and Cellular module. Forall antennas specified to be used with the equipment Signature: //‘2 Date: 05/07/2019 Daniel Schkalda Managing director


Document Created: 2019-05-09 12:07:34
Document Modified: 2019-05-09 12:07:34
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