RF Exposure

FCC ID: 2ADAKSFFR6UL2

RF Exposure Info

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FCCID_4375271

Test Report Prepared for: Etherstack Model: SFFR-6 Description: Small Form Factor Repeater Serial Number: 17050004 FCC ID: 2ADAKSFFR6UL2 To FCC Part 1.1310 Date of Issue: April 11, 2019 On the behalf of the applicant: Etherstack Inc. 1115 Broadway Suite 1276 New York, NY 10010 Attention of: Doug Chapman, V.P. Business Development N.A. Ph: (917)661-4110 Email: doug.chapman@etherstack.com Prepared By Compliance Testing, LLC 1724 S. Nevada Way Mesa, AZ 85204 (480) 926-3100 phone / (480) 926-3598 fax www.compliancetesting.com Project No: p1780014 Greg Corbin Project Test Engineer This report may not be reproduced, except in full, without written permission from Compliance Testing All results contained herein relate only to the sample tested p1780014_FCC_Part 1.1310_Rev 6.0 Page 1 of 6

Test Report Revision History Revision Date Revised By Reason for Revision 1.0 October 16, 2017 Greg Corbin Original Document Updated model and EUT description, 2.0 December 17, 2017 Greg Corbin updated antenna gain Updated FCC ID and revised MPE calculation with 3.0 June 8, 2018 Greg Corbin higher output power Revised MPE calculation due to higher gain 4.0 October 15, 2018 Greg Corbin antenna provided by manufacturer Corrected antenna gain typo on page 4, updated 5.0 October 22, 2018 Greg Corbin RF exposure calculations using the lowest frequency and highest measured output power. Updated MPE calculations to reflect rated power 6.0 April 8, 2019 Greg Corbin including tune-up tolerances p1780014_FCC_Part 1.1310_Rev 6.0 Page 2 of 6

ILAC / A2LA Compliance Testing, LLC, has been accredited in accordance with the recognized International Standard ISO/IEC 17025:2005. This accreditation demonstrates technical competence for a defined scope and the operation of a laboratory quality management system (refer joint ISO-ILAC-IAF Communiqué dated January 2009) The tests results contained within this test report all fall within our scope of accreditation, unless below Please refer to http://www.compliancetesting.com/labscope.html for current scope of accreditation. Testing Certificate Number: 2152.01 FCC Site Reg. #349717 IC Site Reg. #2044A-2 Non-accredited tests contained in this report: N/A p1780014_FCC_Part 1.1310_Rev 6.0 Page 3 of 6

EUT Description Model: SFFR-6 Description: Small Form Factor Repeater Firmware: 2.04.000 Software: N/A Serial Number: 17060004 Additional Information: The EUT is a UHF small form factor tactical repeater operating from 380 - 470 MHz per Table 1 below. The EUT is AC or DC powered, with 2 battery packs for battery power. A 7.15 dBi gain 5/8 wave collinear omnidirectional antenna was specified by the manufacturer. Worst case RF exposure calculations were calculated using the highest gain antenna and the highest output power which is the rated output power listed on the grant plus tune-up tolerances of +/- 0.29 dB. Table 1 Frequency Allocation Repeater Frequency Range (380 - 470 MHz) Frequency Range Sub-Bands Rule Part Extended Frequency (MHz) (MHz) FCC Part 90 406.1 - 470 406.1 - 420 421 - 430 450 - 470 380 - 406 430 - 450 FCC Part 22 454 - 460 454 - 455 456 - 460 N/A N/A N/A FCC Part 74 450 - 456 450 - 454 455 - 456 N/A N/A N/A 462.7375 - FCC Part 80 454 - 470 454 - 455 456 - 460 N/A N/A 470 RSS 119 406.1 - 470 406.1 - 430 450 - 470 N/A N/A N/A p1780014_FCC_Part 1.1310_Rev 6.0 Page 4 of 6

MPE Evaluation This is a portable device used in Uncontrolled Exposure environment. Limits Uncontrolled Exposure 0.3-1.234 MHz: Limit [mW/cm²] = 100 47 CFR 1.1310 1.34-30 MHz: Limit [mW/cm²] = (180/f²) Table 1, (B) 30-300 MHz: Limit [mW/cm²] = 0.2 300-1500 MHz: Limit [mW/cm²] = f/1500 1500-100,000 MHz Limit [mW/cm²] = 1.0 Test Data Test Frequency, MHz 406.1 Power, Conducted, mW (P) 29936 Antenna Gain Isotropic 7.15 dBi Antenna Gain Numeric (G) 5.19 Antenna Type 5/8 wave collinear omnidirectional Distance (R) 20 cm 𝑃∗𝐺 𝑆= 4𝜋𝑟 2 Power Density (S) mw/cm 2 30.91 mw/cm2 Power Density (S) = 30.91mw/cm2 Limit =(from above table) = 0.271 mw/cm2 The power density at 30.91 mw/cm2 is over the 0.271 mw/cm2 limit. The Minimum Safe Distance was calculated on the next page. p1780014_FCC_Part 1.1310_Rev 6.0 Page 5 of 6

Minimum Safe Distance Evaluation This is a mobile device used in Uncontrolled Exposure environment. Limits Uncontrolled Exposure 0.3-1.234 MHz: Limit [mW/cm²] = 100 47 CFR 1.1310 1.34-30 MHz: Limit [mW/cm²] = (180/f²) Table 1, (B) 30-300 MHz: Limit [mW/cm²] = 0.2 300-1500 MHz: Limit [mW/cm²] = f/1500 1500-100,000 MHz Limit [mW/cm²] = 1.0 Test Data Test Frequency, MHz 406.1 Power, Conducted, mW (P) 29936 Antenna Gain Isotropic 7.15 dBi Antenna Gain Numeric (G) 5.19 Antenna Type 5/8 wave collinear omnidirectional Limit (L) 0.271 mw/cm2 R=√(PG/4πL) Distance (R) cm Power mW (P) Numeric Gain (G) Limit (L) 213.6 cm 29936 5.19 0.271 mw/cm2 The minimum safe distance is 213.6 cm for a 7.15 dBi gain antenna. END OF TEST REPORT p1780014_FCC_Part 1.1310_Rev 6.0 Page 6 of 6


Document Created: 2019-04-11 08:56:50
Document Modified: 2019-04-11 08:56:50
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