Test Report

FCC ID: BRWDSTX1

Test Report

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FCCID_2371027

Electromagnetic Compatibility Test Report Tests Performed on a Horizon Hobby 2.4 GHz Transmitter Transciever, Model DX2E Radiometrics Document RP-7632 Product Detail: FCC ID: BRWDSTX1 IC: 6157A-STX1 Equipment type: DTS Test Standards: US CFR Title 47, Chapter I, FCC Part 15 Subpart C FCC Part 15 CFR Title 47: 2012 Industry Canada RSS-210, Issue 8: 2010 as required for Category I Equipment This report concerns: Class II Permissive Change FCC Part 15.247 Tests Performed For: Test Facility: Horizon Hobby Radiometrics Midwest Corporation 4105 Fieldstone Rd. 12 East Devonwood Champaign, IL 61822 Romeoville, IL 60446 (815) 293-0772 Test Date(s): (Month-Day-Year) July 9 to September 17, 2013 Document RP-7632 Revisions: Rev. Issue Date Affected Sections Revised By 0 September 17, 2013 1 May 2, 2014 6 Joseph Strzelecki Radiometrics Midwest Corporation (815) 293-0772 – www.radiomet.com Page 1 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Table of Contents 1 ADMINISTRATIVE DATA .................................................................................................................... 3 2 TEST SUMMARY AND RESULTS ...................................................................................................... 3 2.1 RF Exposure Compliance Requirements ..................................................................................... 4 3 EQUIPMENT UNDER TEST (EUT) DETAILS..................................................................................... 4 3.1 EUT Description ............................................................................................................................ 4 3.1.1 FCC Section 15.203 & RSS-GEN Antenna Requirements .................................................... 4 3.2 Description of Permissive Change ................................................................................................ 4 4 TESTED SYSTEM DETAILS .............................................................................................................. 4 4.1 Tested System Configuration ....................................................................................................... 4 4.2 Special Accessories...................................................................................................................... 4 4.3 Equipment Modifications ............................................................................................................... 5 5 TEST SPECIFICATIONS AND RELATED DOCUMENTS .................................................................. 5 6 RADIOMETRICS’ TEST FACILITIES .................................................................................................. 5 7 DEVIATIONS AND EXCLUSIONS FROM THE TEST SPECIFICATIONS ......................................... 6 8 CERTIFICATION ................................................................................................................................. 6 9 TEST EQUIPMENT TABLE ................................................................................................................ 6 10 TEST SECTIONS .............................................................................................................................. 6 10.1 Occupied Bandwidth ................................................................................................................... 6 10.2 Peak Output Power ..................................................................................................................... 9 10.3 Power Spectral Density ............................................................................................................ 10 10.4 Band-edge Compliance of RF Conducted Emissions ............................................................... 10 10.5 Spurious RF Conducted Emissions .......................................................................................... 12 10.6 Spurious Radiated Emissions (Restricted Band) ...................................................................... 13 10.6.1 Radiated Emissions Field Strength Sample Calculation .................................................... 13 10.6.2 Spurious Radiated Emissions Test Results ....................................................................... 14 10.7 Unintentional Emissions (Receive Mode) ................................................................................. 19 Notice: This report must not be reproduced (except in full) without the written approval of Radiometrics Midwest Corporation. RP-7632 Rev. 1 Page 2 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 1 ADMINISTRATIVE DATA Equipment Under Test: A Horizon Hobby, 2.4 GHz Transmitter Model: DX2E Serial Number: none This will be referred to as the EUT in this Report Date EUT Received at Radiometrics: (Month-Day-Year) Test Date(s): (Month-Day-Year) July 8, 2013 July 9 to September 17, 2013 Test Report Written By: Test Witnessed By: Joseph Strzelecki Jeff Walker Senior EMC Engineer Horizon Hobby Radiometrics’ Personnel Responsible for Test: Test Report Approved By Joseph Strzelecki Chris W. Carlson Senior EMC Engineer Director of Engineering NARTE EMC-000877-NE NARTE EMC-000921-NE 2 TEST SUMMARY AND RESULTS The EUT (Equipment Under Test) is a 2.4 GHz Transmitter, Model DX2E, manufactured by Horizon Hobby. The detailed test results are presented in a separate section. The following is a summary of the test results. Spread Spectrum Transmitter Requirements Environmental Phenomena Frequency Range FCC Section RSS- Section Test Result RF AC Mains Conducted Emissions 0.15 - 30 MHz 15.207 GEN; 7.2.2 N/A Note 1 RF Radiated Emissions (Unintential 30-25,000 MHz 15.209 GEN; 7.2.5 Pass Radiation Receive mode) 6 dB Bandwidth Test 2400 to 2483 MHz 15.247 a 210; A8.1 (4) Pass 20 dB Bandwidth Test 2400 to 2483 MHz 15.247 a 210; A8.1 (4) Pass Peak Output Power 2400 to 2483 MHz 15.247 b 210; A8.1 (1) Pass Band-edge Compliance of RF 2400 to 2483 MHz 15.247 d 210; A8.4 (2) Pass Conducted Emissions Spurious Radiated Emissions 30 MHz to 25 GHz 15.247 d 210; A8.5 Pass Power Spectral Density 2400 to 2483 MHz 15.247 e 210; A8.2 (1) Pass Note 1: AC conducted emissions were not done since the EUT is battery powered. The RSS-210 specification is not currently covered in Radiometrics’ Scope of Accreditation. This is technically very similar to FCC, CFR 47 Part 15 which is on Radiometrics scope. The middle channel was not tested since that channel was not changed. RP-7632 Rev. 1 Page 3 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 2.1 RF Exposure Compliance Requirements Since the EUT is less than 20 mW average, it is exempt from RSS-102 102 SAR and RF exposure evaluations. There are no power level adjustments and the antenna is permanently attached. The detailed calculations for RF Exposure are presented in a separate document. 3 EQUIPMENT UNDER TEST (EUT) DETAILS 3.1 EUT Description The EUT is a 2.4 GHz Transmitter, Model DX2E, manufactured by Horizon Hobby. The EUT was in good working condition during the tests, with no known defects. 3.1.1 FCC Section 15.203 & RSS-GEN Antenna Requirements The antenna is a half wave monopole. The antenna has a reverse polarity connector type that is not readily available to the general public. Therefore it meets the 15.203 Requirements. The antenna is permanently attached to the printed circuit board. The antenna is internal to the EUT and it is not readily available to be modified by the end user. Therefore, it meets the 15.203 Requirements. 3.2 Description of Permissive Change In the original version the transmitting frequency range is from 2418MHz to 2460MHz. In the new version, the range changed from 2402MHz to 2478MHz. The middle channel was not tested since that channel was not changed. 4 TESTED SYSTEM DETAILS 4.1 Tested System Configuration The system was configured for testing in a typical fashion. The EUT was placed on an 80-cm high, nonconductive test stand. The testing was performed in conditions as close as possible to installed conditions. Wiring was consistent with manufacturer's recommendations. Since the EUT is wall mounted, it was placed in an upright configuration during the tests. The EUT was tested as a stand-alone device. Power was supplied with a new battery. The identification for all equipment, plus descriptions of all cables used in the tested system, are: Tested System Configuration List Item Description Type* Manufacturer Model Number Serial Number 1 2.4 GHz Transmitter E Horizon Hobby DX2E none * Type: E = EUT, P = Peripheral, S = Support Equipment; H = Host Computer 4.2 Special Accessories No special accessories were used during the tests in order to achieve compliance. RP-7632 Rev. 1 Page 4 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 4.3 Equipment Modifications No modifications were made to the EUT at Radiometrics' test facility in order to comply with the standards listed in this report. 5 TEST SPECIFICATIONS AND RELATED DOCUMENTS Document Date Title FCC 2012 Code of Federal Regulations Title 47, Chapter 1, Federal CFR Title 47 Communications Commission, Part 15 - Radio Frequency Devices ANSI 2009 Methods of Measurement of Radio Noise Emissions from Low-Voltage C63.4-2009 Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz ANSI 2009 American National Standard for Testing Unlicensed Wireless Devices C63.10-2009 IC RSS-210 2010 Low Power Licence-Exempt Radiocommunication Devices (All Frequency Issue 8 Bands) Category I Equipment IC RSS-Gen 2010 General Requirements and Information for the Certification of Issue 3 Radiocommunication Equipment (RSS-Gen) FCC 558074 2005 Measurement of Digital Transmission Systems Operating under Section 15.247 The test procedures used are in accordance with the FCC 558074, Industry Canada RSS-GEN and ANSI document C63.4, "Methods of Measurement of Radio Noise Emissions from Low-Voltage Electrical and Electronic Equipment in the Range of 9 kHz to 40 GHz". The specific procedures are described herein. Radiated testing was performed at an antenna to EUT distance of 3 meters. The antenna was raised and lowered from 1 to 4 meters. 6 RADIOMETRICS’ TEST FACILITIES The results of these tests were obtained at Radiometrics Midwest Corp. in Romeoville, Illinois, USA. Radiometrics is accredited by A2LA (American Association for Laboratory Accreditation) to conform to ISO/IEC 17025: 2005 "General Requirements for the Competence of Calibration and Testing Laboratories". Radiometrics’ Lab Code is 121191 and Certification Number is 1495.01. Radiometrics’ scope of accreditation includes all of the test methods listed herein. A copy of the accreditation can be accessed on our web site (www.radiomet.com). Radiometrics accreditation status can be verified at A2LA’s web site (www.a2la2.org). The following is a list of shielded enclosures located in Romeoville, Illinois used during the tests: Chamber E: Is a custom made anechoic chamber that measures 52’ L X 30’ W X 18’ H. The walls and ceiling are fully lined with RF absorber. Pro-shield of Collinsville, Oklahoma manufactured the chamber. The floor has a 9’ x 9’ section of microwave absorber for testing above 1 GHz. Test Station F: Is an area that measures 10’ D X 12’ W X 10’ H. The floor and back wall are metal shielded. This area is used for conducted emissions measurements. A separate ten-foot long, brass plated, steel ground rod attached via a 6 inch copper braid grounds each of the above chambers. Each enclosure is also equipped with low-pass power line filters. The FCC has accepted these sites as test site number US1065. The FCC test site Registration Number is 732175. Details of the site characteristics are on file with the Industry Canada as site number IC8727A-1. RP-7632 Rev. 1 Page 5 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter A complete list of the test equipment is provided herein. The calibration due dates are indicated on the equipment list. The equipment is calibrated in accordance to ANSI/NCSL Z540-1 with traceability to the National Institute of Standards and Technology (NIST). 7 DEVIATIONS AND EXCLUSIONS FROM THE TEST SPECIFICATIONS There were no deviations or exclusions from the test specifications. 8 CERTIFICATION Radiometrics Midwest Corporation certifies that the data contained herein was taken under conditions that meet or exceed the requirements of the test specification and the data contained herein was taken with calibrated test equipment. The results relate only to the EUT listed herein. 9 TEST EQUIPMENT TABLE Frequency Cal Cal RMC ID Manufacturer Description Model No. Serial No. Range Period Date AMP-05 RMC/Celeritek Pre-amplifier MW110G 1001 1.0-12GHz 12 Mo. 01/24/13 AMP-20 Avantek Pre-amplifier SF8-0652 15221 8-18GHz 12 Mo 01/15/13 AMP-22 Anritsu Pre-amplifier MH648A M23969 0.1-1200MHz 12 Mo. 01/16/13 AMP-29 HP / Agilent Amplifier 11975A 2304A00158 2-8 GHz 12 Mo. 11/06/12 ANT-13 EMCO Horn Antenna 3115 2502 1.0-18GHz 24 Mo. 12/05/12 ANT-44 Impossible Super Log Antenna SL-20M2G 1002 20-2000MHz 24 Mo. 12/14/11 Machine ANT-48 RMC Std Gain Horn HW2020 1001 18-26 GHz 12 Mo. 04/05/13 ANT-53 EMCO Loop Antenna 6507 1453 1 kHz-30 MHz 24 Mo 10/26/11 HPF-01 Solar High Pass Filter 7930-100 HPF-1 0.15-30MHz 24 Mo. 01/24/12 HPF-06 Mini-Circuits High Pass Filter VHF-3800+ 31035 4-11 GHz 12 Mo. 08/06/12 MXR-02 HP / Agilent Harmonic Mixer 11970K 2332A00489 18-26.5GHz 12 Mo. 11/06/12 REC-03 Anritsu Spectrum Analyzer MS2601B MT94589 0.01-2200MHz 12 Mo. 04/08/13 REC-08 Hewlett Spectrum Analyzer 8566B 2648A13481 30Hz-22GHz 24 Mo. Packard 2209A01436 10/28/11 Hewlett REC-11 Packard Spectrum Analyzer E7405A US39110103 9Hz-26.5GHz 12 Mo. 06/13/13 THM-02 Fluke Temp/Humid Meter 971 93490471 N/A 12 Mo. 05/25/12 Note: All calibrated equipment is subject to periodic checks. 10 TEST SECTIONS 10.1 Occupied Bandwidth The spectrum analyzer was set to the MAX HOLD mode to record the worst case of the modulation. The EUT was transmitting at its maximum data rate. The trace was allowed to stabilize. The marker-to-peak function was set to the peak of the emission. Then the marker-delta function was used to measure 6 or 20 dB down one side of the emission. The marker-delta function was reset and then moved to the other side of the emission, until it is (as close as possible to) even with the reference marker level. The marker-delta reading at this point is the bandwidth of the emission. RP-7632 Rev. 1 Page 6 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 20 dB EBW 6 dB EBW Channel MHz MHz 2402 1.282 0.892 2478 1.455 0.922 20 dB Bandwidth (Low Channel) RP-7632 Rev. 1 Page 7 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 20 dB Bandwidth (High Channel) 6 dB Bandwidth (Low Channel) RP-7632 Rev. 1 Page 8 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 6 dB Bandwidth (High Channel) 10.2 Peak Output Power Since antenna conducted tests cannot be performed on the EUT, radiated tests were performed to show compliance with this requirement. The FCC procedures from power output option 2, Method #3 were used. The transmitter's peak power was calculated using the following equation: P = (E x d)^2 / (30) Where: E = the measured maximum peak field strength in V/m. d = Distance in meters from which the field strength was measured. (3 meters) P = The EUT power in watts The Field Strength was measured using the procedures described in section 10.9, with the exception of the resolution and video bandwidths. The spectrum analyzer was set to the following settings: Span = 3 MHz ; RBW = 1 MHz (> the 20 dB bandwidth of the emission being measured) VBW = 3 MHz; Sweep = auto; Detector function = peak; Trace = max hold Since the gain of the antenna is always less than 6dB, the limit is not reduced. dBuV/m Test Dist Power Peak EUT Limit MHz peak V/m meters Watts dBm dBm 2402 109.8 0.309 3 0.0286 14.6 30 2478 112.1 0.403 3 0.0487 16.9 30 Overall Test result: Pass by 13.1 dB RP-7632 Rev. 1 Page 9 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 10.3 Power Spectral Density Since antenna conducted tests cannot be performed on the EUT, radiated tests were performed to show compliance with this requirement. The FCC procedures from PSD option 1 was used. The power spectral density was measured as follows. The field strength was measured using the procedures described in section 10.9, with the following exceptions: The analyzer was tuned to the highest point of the maximized fundamental emission. The analyzer was set to RBW = 3 kHz, VBW > RBW, span = 300 kHz and a sweep = 100 Sec. Using this peak level, the transmitter's power spectral density was calculated using the following equation: P = (E x d)^2 / (30) Where: E = the measured maximum peak field strength in V/m, using the bandwiths in this section. d = Distance in meters from which the field strength was measured. (3 meters) P = The EUT power in watts 3kHz PSD Field 3 kHz Spectral Density from Freq Strength Test Distance EUT Limit MHz dBuV/m V/m Meters Watts dBm dBm 2402 100.7 0.108 3 0.0035 5.5 8 2478 100.9 0.111 3 0.0037 5.7 8 Overall Test result: Pass by 2.3 dB 10.4 Band-edge Compliance of RF Conducted Emissions The spectrum analyzer was set to the MAX HOLD mode to record the worst case of the modulation at the band-edge, with the EUT set to the lowest frequency. The trace was allowed to stabilize. Span = 30 MHz RBW = 100 kHz VBW = 1 MHz Sweep = auto Detector function = peak Trace = max hold Reading at Band Edge Minimum Allowed Channel Freq. (MHz) Delta (dB) dBc 2402 Lower Band edge 2400 35.3 20 2474 Upper Band edge 2483.5 45.8 20 Judgment: Passed by 15.2 dB RP-7632 Rev. 1 Page 10 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter RP-7632 Rev. 1 Page 11 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 10.5 Spurious RF Conducted Emissions Since antenna conducted tests cannot be performed on the EUT, radiated tests were performed to show compliance with this requirement. The EUT was tested in continous mode and peak readings were made from the lowest frequency generated in the EUT up through the 10th harmonic. The limit is 20 dB lower than the peak of the lowest fundamental. The data is shown graphically. Spurious Emissions Relative to Fundamental Vertical Lowest Limit 100 90 80 dBuV/m 70 60 50 40 30 0 5 10 15 20 25 GHz Spurious Emissions Relative to Fundamental Horizontal Lowest Limit 100 90 80 dBuV/m 70 60 50 40 30 0.0 5.0 10.0 15.0 20.0 25.0 GHz Judgement: Pass by 19 dB RP-7632 Rev. 1 Page 12 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 10.6 Spurious Radiated Emissions (Restricted Band) Radiated emission measurements were performed with linearly polarized broadband antennas. The results obtained with these antennas can be correlated with results obtained with a tuned dipole antenna. The radiated emission measurements were performed with a spectrum analyzer. The bandwidth used from 150 kHz to 30 MHz is 9 or 10 kHz and the bandwidth from 30 MHz to 1000 MHz is 100 or 120 kHz. Above 1 GHz, a 1 MHz bandwidth is used. A 10 dB linearity check is performed prior to start of testing in order to determine if an overload condition exists. From 30 to 1000 MHz, an Anritsu spectrum analyzer was used. For tests from 1 to 25 GHz, an HP 8566 spectrum analyzer was used. For tests from 1 to 10 GHz, a high pass filter was used to reduce the fundamental emission. A harmonic mixer was used from 18 to 25 GHz. Figure 4 herein lists the details of the test equipment used during radiated emissions tests. In addition, a high pass filter was used to reduce the fundamental emission. The was device was rotated through three orthogonal axis as per 13.1.4.1 of ANSI C63.4 during the radiated tests. Final radiated emissions measurements were performed inside of an anechoic chamber at a test distance of 3 meters. The anechoic chamber is designated as Chamber E. This Chamber meets the Site Attenuation requirements of ANSI C63.4 and CISPR 16-1. Chamber E is located at 12 East Devonwood Ave. Romeoville, Illinois EMI test lab. The entire frequency range from 30 to 25000 MHz was slowly scanned with particular attention paid to those frequency ranges which appeared high. Measurements were performed using two antenna polarizations, (vertical and horizontal). The worst case emissions were recorded. All measurements may be performed using either the peak, average or quasi-peak detector functions. If the peak detector data exceeds or is marginally close to the limits, the measurements are repeated using a quasi-peak detector or average function as required by the specification for final determination of compliance. The detected emission levels were maximized by rotating the EUT, adjusting the positions of all cables, and by scanning the measurement antenna from 1 to 4 meters above the ground. 10.6.1 Radiated Emissions Field Strength Sample Calculation The field strength is calculated by adding the Antenna Factor and Cable Loss, and by subtracting the Amplifier Gain from the measured reading. The basic equation is as follows: FS = RA + AF + CF - AG Where: FS = Field Strength RA = Receiver Amplitude AF = Antenna Factor CF = Cable Attenuation Factor AG = Amplifier Gain HPF = High pass Filter Loss PKA = Peak to Average Factor (This is zero for non-average measurements) The Peak to average factor is used when average measurements are required. It is calculated by the highest duty cycle in percent over any 100mS transmission. The factor in dB is 20 * Log(Duty cycle/100). RP-7632 Rev. 1 Page 13 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Figure 1. Drawing of Radiated Emissions Setup EUT 1x1.5m surface 80 cm above Flush-mount Turntable Notes:  AC outlet with low-pass filter at the base of the turntable  Antenna height varied from 1 to 4 meters  Distance from antenna to tested system is 3 meters  Not to Scale Antenna For Radiated Emissions Spectrum Preamp Analyzer 10.6.2 Spurious Radiated Emissions Test Results The following spectrum analyzer settings were used. Span = wide enough to fully capture the emission being measured RBW = 1 MHz for f  1 GHz, 100 kHz for f < 1 GHz VBW  RBW Sweep = auto Detector function = peak Trace = max hold A Video Bandwidth of 10 Hz was used for Average measurements above 1 GHz. RP-7632 Rev. 1 Page 14 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Manufacturer Horizon Hobby Specification FCC Part 15 Subpart B & RSS-210 Model DX2E Test Date July 17, 2013 Serial Number none Test Distance 3 Meters Abbreviations Pol = Antenna Polarization; V = Vertical; H = Horizontal; BC = Biconical (ANT-3); LP = Log-Periodic (ANT-6); HN = Horn (ANT-13) P = peak; Q = QP Notes Corr. Factors = Cable Loss – Preamp Gain – Duty Cycle Factor + HP Filter Loss Configuration EUT is transmitting at 2440 MHz ; in the X position Meter Antenna Corr. Field Strength Margin Reading Det. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 33.2 26.6 P 16.3 H/44 -28.4 14.5 40.0 25.5 105.6 38.3 P 11.7 H/44 -27.5 22.5 43.5 21.0 143.6 32.2 P 10.3 H/44 -27.1 15.5 43.5 28.0 191.2 41.2 P 9.9 H/44 -26.6 24.5 43.5 19.0 215.2 47.7 P 11.1 H/44 -26.3 32.5 43.5 11.0 226.8 53.3 P 11.7 H/44 -26.2 38.7 46.0 7.3 227.8 53.1 P 11.6 H/44 -26.2 38.4 46.0 7.6 240.1 49.9 P 11.8 H/44 -26.3 35.4 46.0 10.6 252.4 48.0 P 12.8 H/44 -27.6 33.2 46.0 12.8 276.5 44.0 P 13.1 H/44 -27.5 29.6 46.0 16.4 312.4 52.2 P 13.4 H/44 -27.5 38.1 46.0 7.9 336.4 42.3 P 14.0 H/44 -27.6 28.7 46.0 17.3 360.0 40.9 P 14.6 H/44 -27.4 28.1 46.0 17.9 384.0 47.6 P 15.5 H/44 -27.5 35.6 46.0 10.4 408.1 43.1 P 15.6 H/44 -27.4 31.3 46.0 14.7 455.7 36.0 P 16.1 H/44 -27.0 25.0 46.0 21.0 612.0 39.9 P 19.2 H/44 -26.8 32.3 46.0 13.7 732.0 39.2 P 20.4 H/44 -26.2 33.4 46.0 12.6 852.0 32.6 P 21.4 H/44 -25.6 28.4 46.0 17.6 226.8 42.4 P 11.7 V/44 -26.2 27.8 46.0 18.2 227.8 42.5 P 11.6 V/44 -26.2 27.9 46.0 18.1 312.4 48.9 P 13.4 V/44 -27.5 34.8 46.0 11.2 360.0 48.7 P 14.6 V/44 -27.4 35.8 46.0 10.2 384.0 54.0 Q 15.5 V/44 -27.5 42.0 46.0 4.0 395.8 51.9 P 15.4 V/44 -27.4 39.8 46.0 6.2 408.1 50.5 P 15.6 V/44 -27.4 38.7 46.0 7.3 431.6 44.8 P 16.5 V/44 -27.4 33.8 46.0 12.2 455.7 50.2 P 16.1 V/44 -27.0 39.3 46.0 6.7 491.6 36.3 P 17.2 V/44 -26.9 26.6 46.0 19.4 504.0 32.7 P 17.6 V/44 -26.9 23.5 46.0 22.5 612.0 39.7 P 19.2 V/44 -26.8 32.1 46.0 13.9 708.0 42.2 P 20.1 V/44 -26.5 35.8 46.0 10.2 780.0 45.2 P 20.6 V/44 -26.1 39.7 46.0 6.3 852.0 39.8 P 21.4 V/44 -25.6 35.6 46.0 10.4 924.0 38.6 P 21.8 V/44 -25.3 35.1 46.0 10.9 996.0 31.2 P 22.7 V/44 -24.4 29.5 54.0 24.5 Notes: Y position 36.8 34.9 P 16.0 H/44 -28.4 22.5 40.0 17.5 103.2 39.3 P 10.5 H/44 -27.6 22.3 43.5 21.2 RP-7632 Rev. 1 Page 15 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Meter Antenna Corr. Field Strength Margin Reading Det. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 215.2 38.6 P 11.1 H/44 -26.3 23.4 43.5 20.1 227.2 41.9 P 11.7 H/44 -26.2 27.4 46.0 18.6 336.4 41.4 P 14.0 H/44 -27.6 27.8 46.0 18.2 360.0 45.5 P 14.6 H/44 -27.4 32.7 46.0 13.3 384.0 47.0 P 15.5 H/44 -27.5 35.0 46.0 11.0 408.1 40.2 P 15.6 H/44 -27.4 28.5 46.0 17.5 455.7 41.2 P 16.1 H/44 -27.0 30.2 46.0 15.8 636.0 42.3 P 20.1 H/44 -26.5 35.8 46.0 10.2 708.0 42.7 P 20.1 H/44 -26.5 36.2 46.0 9.8 732.0 42.2 P 20.4 H/44 -26.2 36.4 46.0 9.6 780.0 40.0 P 20.6 H/44 -26.1 34.5 46.0 11.5 828.0 34.3 P 21.0 H/44 -25.8 29.5 46.0 16.5 876.0 33.9 P 21.3 H/44 -25.6 29.6 46.0 16.4 936.0 38.0 P 22.3 H/44 -25.1 35.1 46.0 10.9 948.0 38.3 P 22.4 H/44 -25.0 35.6 46.0 10.4 984.0 37.2 P 23.0 H/44 -24.5 35.6 54.0 18.4 45.2 32.9 P 15.0 V/44 -28.2 19.7 40.0 20.3 113.2 46.6 P 12.7 V/44 -27.4 31.9 43.5 11.6 215.2 41.2 P 11.1 V/44 -26.3 25.9 43.5 17.6 226.8 43.8 P 11.7 V/44 -26.2 29.2 46.0 16.8 227.8 43.6 P 11.6 V/44 -26.2 28.9 46.0 17.1 312.4 50.8 P 13.4 V/44 -27.5 36.7 46.0 9.3 336.4 42.4 P 14.0 V/44 -27.6 28.8 46.0 17.2 360.0 47.2 P 14.6 V/44 -27.4 34.3 46.0 11.7 384.0 50.7 P 15.5 V/44 -27.5 38.7 46.0 7.3 407.6 47.6 P 15.6 V/44 -27.4 35.8 46.0 10.2 455.7 46.0 P 16.1 V/44 -27.0 35.0 46.0 11.0 612.0 40.2 P 19.2 V/44 -26.8 32.6 46.0 13.4 708.0 39.1 P 20.1 V/44 -26.5 32.7 46.0 13.3 732.0 39.1 P 20.4 V/44 -26.2 33.2 46.0 12.8 780.0 38.6 P 20.6 V/44 -26.1 33.1 46.0 12.9 852.0 34.0 P 21.4 V/44 -25.6 29.9 46.0 16.1 924.0 35.4 P 21.8 V/44 -25.3 31.9 46.0 14.1 Notes: Z position 53.6 32.2 P 13.0 H/44 -28.1 17.1 40.0 22.9 191.2 41.0 P 9.9 H/44 -26.6 24.3 43.5 19.2 215.2 47.0 P 11.1 H/44 -26.3 31.8 43.5 11.7 226.8 52.9 P 11.7 H/44 -26.2 38.4 46.0 7.6 227.8 52.7 P 11.6 H/44 -26.2 38.1 46.0 7.9 252.4 47.9 P 12.8 H/44 -27.6 33.2 46.0 12.8 276.5 44.8 P 13.1 H/44 -27.5 30.4 46.0 15.6 312.4 54.9 P 13.4 H/44 -27.5 40.8 46.0 5.2 336.4 47.0 P 14.0 H/44 -27.6 33.4 46.0 12.6 360.0 49.8 P 14.6 H/44 -27.4 37.0 46.0 9.0 384.0 53.9 Q 15.5 H/44 -27.5 41.9 46.0 4.1 408.1 46.5 P 15.6 H/44 -27.4 34.8 46.0 11.2 RP-7632 Rev. 1 Page 16 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Meter Antenna Corr. Field Strength Margin Reading Det. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 443.4 37.3 P 17.2 H/44 -27.2 27.3 46.0 18.7 500.0 28.0 P 17.5 H/44 -26.9 18.7 46.0 27.3 503.3 29.9 P 17.6 H/44 -26.9 20.6 46.0 25.4 588.0 34.7 P 19.5 H/44 -26.7 27.5 46.0 18.5 612.0 43.9 P 19.2 H/44 -26.8 36.3 46.0 9.7 660.0 40.6 P 20.4 H/44 -26.6 34.3 46.0 11.7 684.0 42.2 P 20.3 H/44 -26.5 36.0 46.0 10.0 708.0 46.0 P 20.1 H/44 -26.5 39.6 46.0 6.4 732.0 47.4 Q 20.4 H/44 -26.2 41.6 46.0 4.4 756.0 48.9 Q 20.7 H/44 -26.1 43.4 46.0 2.6 780.0 48.1 Q 20.6 H/44 -26.1 42.6 46.0 3.4 804.0 44.6 P 20.7 H/44 -25.8 39.5 46.0 6.5 852.0 38.5 P 21.4 H/44 -25.6 34.3 46.0 11.7 900.0 32.6 P 21.8 H/44 -25.3 29.2 46.0 16.8 924.0 34.1 P 21.8 H/44 -25.3 30.5 46.0 15.5 43.6 35.4 P 15.4 V/44 -28.3 22.6 40.0 17.4 226.8 41.7 P 11.7 V/44 -26.2 27.1 46.0 18.9 360.0 42.9 P 14.6 V/44 -27.4 30.1 46.0 15.9 384.0 48.1 P 15.5 V/44 -27.5 36.1 46.0 9.9 408.1 50.1 P 15.6 V/44 -27.4 38.3 46.0 7.7 431.6 43.2 P 16.5 V/44 -27.4 32.3 46.0 13.7 455.7 46.3 P 16.1 V/44 -27.0 35.3 46.0 10.7 612.0 36.5 P 19.2 V/44 -26.8 28.8 46.0 17.2 708.0 36.9 P 20.1 V/44 -26.5 30.5 46.0 15.5 804.0 32.4 P 20.7 V/44 -25.8 27.3 46.0 18.7 876.0 34.2 P 21.3 V/44 -25.6 29.9 46.0 16.1 Judgment: Passed by 2.6 dB RP-7632 Rev. 1 Page 17 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Fundamental, Harmonic and Band edge emissions from 1 to 25 GHz Spectrum Analyzer Readings EUT Peak Ave Peak Ave Margin hrm Tx Peak Ave Peak Ave Corr. Emission Tot. FS Limit Under Vertical Polarization Horizontal Polarization Freq # Freq X Y Z Max X Y Z Max Fact. MHz dBuV/m dBuV/m Limit 1 2402 99.1 105.4 96.9 83.5 105.6 97.1 103.9 83.7 3.3 2402.0 108.9 87.0 125 115 16.1 be 2402 55.2 61.5 53.0 39.6 61.7 53.2 60.0 39.8 3.3 2390.0 65.0 43.1 74 54 9.0 2 2402 53.5 58.0 55.8 36.1 59.3 54.1 54.0 37.4 11.9 4804.0 71.2 49.3 74 54 2.8 3 2402 46.3 52.8 49.1 30.9 50.4 50.3 48.4 28.5 12.6 7206.0 65.4 43.5 74 54 8.6 4 2402 41.4 44.8 42.3 22.8 42.4 42.3 41.2 20.5 19.2 9608.0 64.0 42.0 74 54 10.1 1 2478 99.5 105.1 97.0 83.2 103.7 98.9 107.8 85.9 3.4 2478.0 111.2 89.3 125 115 13.8 BE 2478 53.7 59.3 51.2 37.4 57.9 53.1 62.0 40.1 3.4 2483.5 65.4 43.5 74 54 8.6 2 2478 52.8 53.9 55.2 33.3 52.6 53.0 51.0 31.1 11.9 4956.0 67.1 45.2 74 54 6.9 3 2478 46.6 49.2 47.0 27.3 48.1 45.6 46.9 26.2 13.1 7434.0 62.3 40.4 74 54 11.7 4 2478 41.6 41.4 41.1 19.7 41.8 41.7 41.4 19.9 22.6 9912.0 64.4 42.5 74 54 9.6 Column numbers (see below for explanations) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Judgment: Passed by 2.8 dB No other emissions were detected from 10 to 25 GHz. Column #1. hrm = Harmonic; BE = Band Edge emissions Column #2. Frequency of Transmitter. Column #3. Uncorrected readings from the spectrum analyzer with First Axis Rotation. Column #4. Uncorrected readings from the spectrum analyzer with Second Axis Rotation. Column #5. Uncorrected readings from the spectrum analyzer with Third Axis Rotation. Column #6. Average Reading based on peak reading reduced by the Duty cylce correction Column #7. Uncorrected readings from the spectrum analyzer with First Axis Rotation. Column #8. Uncorrected readings from the spectrum analyzer with Second Axis Rotation. Column #9. Uncorrected readings from the spectrum analyzer with Third Axis Rotation. Column #10. Average Reading based on peak reading reduced by the Duty cylce correction Column #11. Corr. Factors = Cable Loss – Preamp Gain + Antenna Factor Column #12. Frequency of Tested Emission Column #13. Highest peak field strength at listed frequency. Column #14. Highest Average field strength at listed frequency. Column #15. Peak Limit. Column #16. Average Limit. Column #17. The margin (last column) is the worst case margin under the peak or average limits for that row. RP-7632 Rev. 1 Page 18 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter 10.7 Unintentional Emissions (Receive Mode) Manufacturer Horizon Hobby Specification FCC Part 15.209 & RSS-210 Model DX2E Test Date 07/24/2013 Serial Number none Test Distance 3 Meters Abbreviations Pol = Antenna Polarization; V = Vertical; H = Horizontal; P = peak; Q = QP Notes Corr. Factors = Cable Loss – Preamp Gain – Duty Cycle Factor + HP Filter Loss Configuration Receive mode, Z Position Meter Antenna Corr. Field Strength Margin Reading Dect. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 35.6 32.4 P 16.2 H/44 -28.4 20.2 40.0 19.8 191.2 40.5 P 9.9 H/44 -26.6 23.8 43.5 19.7 215.2 46.9 P 11.1 H/44 -26.3 31.7 43.5 11.8 227.8 52.7 P 11.6 H/44 -26.2 38.0 46.0 8.0 240.1 52.1 P 11.8 H/44 -26.3 37.6 46.0 8.4 252.4 48.0 P 12.8 H/44 -27.6 33.2 46.0 12.8 312.4 44.5 P 13.4 H/44 -27.5 30.4 46.0 15.6 336.4 43.3 P 14.0 H/44 -27.6 29.7 46.0 16.3 360.0 51.1 P 14.6 H/44 -27.4 38.2 46.0 7.8 384.0 53.8 Q 15.5 H/44 -27.5 41.8 46.0 4.2 443.4 45.3 P 17.2 H/44 -27.2 35.3 46.0 10.7 612.0 45.0 P 19.2 H/44 -26.8 37.3 46.0 8.7 636.0 44.5 P 20.1 H/44 -26.5 38.0 46.0 8.0 708.0 42.9 P 20.1 H/44 -26.5 36.5 46.0 9.5 744.0 45.7 P 20.1 H/44 -26.3 39.5 46.0 6.5 768.0 44.9 P 20.8 H/44 -26.1 39.7 46.0 6.3 816.0 38.7 P 21.4 H/44 -25.7 34.4 46.0 11.6 863.0 35.8 P 21.1 H/44 -25.7 31.2 46.0 14.8 935.0 35.3 P 22.3 H/44 -25.2 32.5 46.0 13.5 34.8 34.6 P 16.2 V/44 -28.4 22.4 40.0 17.6 227.8 40.9 P 11.6 V/44 -26.2 26.3 46.0 19.7 360.0 44.8 P 14.6 V/44 -27.4 31.9 46.0 14.1 384.0 51.0 P 15.5 V/44 -27.5 39.0 46.0 7.0 407.6 45.6 P 15.6 V/44 -27.4 33.8 46.0 12.2 431.6 44.2 P 16.5 V/44 -27.4 33.3 46.0 12.7 443.4 49.8 P 17.2 V/44 -27.2 39.7 46.0 6.3 636.0 34.1 P 20.1 V/44 -26.5 27.7 46.0 18.3 744.0 35.4 P 20.1 V/44 -26.3 29.2 46.0 16.8 887.0 33.3 P 20.9 V/44 -25.5 28.7 46.0 17.3 935.0 33.2 P 22.3 V/44 -25.2 30.4 46.0 15.6 Configuration Y Position 44.0 32.5 P 15.4 H/44 -28.3 19.6 40.0 20.4 104.0 42.3 P 11.0 H/44 -27.5 25.7 43.5 17.8 227.8 42.0 P 11.6 H/44 -26.2 27.3 46.0 18.7 229.2 41.0 P 11.6 H/44 -26.2 26.4 46.0 19.6 312.4 52.1 P 13.4 H/44 -27.5 38.0 46.0 8.0 336.4 40.4 P 14.0 H/44 -27.6 26.9 46.0 19.1 360.0 48.9 P 14.6 H/44 -27.4 36.0 46.0 10.0 RP-7632 Rev. 1 Page 19 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Meter Antenna Corr. Field Strength Margin Reading Dect. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 372.3 45.4 P 15.0 H/44 -27.4 33.0 46.0 13.0 384.0 49.2 P 15.5 H/44 -27.5 37.2 46.0 8.8 407.6 38.8 P 15.6 H/44 -27.4 27.0 46.0 19.0 443.4 41.3 P 17.2 H/44 -27.2 31.3 46.0 14.7 588.0 40.1 P 19.5 H/44 -26.7 33.0 46.0 13.0 612.0 46.5 P 19.2 H/44 -26.8 38.8 46.0 7.2 636.0 43.7 Q 20.1 H/44 -26.5 37.3 46.0 8.7 660.0 43.9 P 20.4 H/44 -26.6 37.6 46.0 8.4 732.0 42.7 P 20.4 H/44 -26.2 36.9 46.0 9.1 768.0 42.6 P 20.8 H/44 -26.1 37.4 46.0 8.6 911.0 36.1 P 22.0 H/44 -25.3 32.8 46.0 13.2 959.0 40.7 P 21.9 H/44 -25.0 37.6 46.0 8.4 983.0 39.5 P 22.9 H/44 -24.5 37.8 54.0 16.2 33.6 38.1 P 16.3 V/44 -28.4 26.0 40.0 14.0 215.2 41.9 P 11.1 V/44 -26.3 26.7 43.5 16.8 227.2 43.6 P 11.7 V/44 -26.2 29.1 46.0 16.9 227.8 41.9 P 11.6 V/44 -26.2 27.3 46.0 18.7 240.1 42.2 P 11.8 V/44 -26.3 27.7 46.0 18.3 312.4 47.5 P 13.4 V/44 -27.5 33.4 46.0 12.6 360.0 46.5 P 14.6 V/44 -27.4 33.6 46.0 12.4 384.0 49.0 P 15.5 V/44 -27.5 37.1 46.0 8.9 407.6 45.6 P 15.6 V/44 -27.4 33.8 46.0 12.2 444.0 51.2 Q 17.2 V/44 -27.2 41.2 46.0 4.8 467.5 37.5 P 17.1 V/44 -27.0 27.5 46.0 18.5 588.0 39.0 P 19.5 V/44 -26.7 31.8 46.0 14.2 732.0 34.1 P 20.4 V/44 -26.2 28.2 46.0 17.8 911.0 39.1 P 22.0 V/44 -25.3 35.8 46.0 10.2 935.0 39.8 P 22.3 V/44 -25.2 36.9 46.0 9.1 Configuration X Position 34.0 34.7 P 16.3 H/44 -28.4 22.5 40.0 17.5 215.2 46.7 P 11.1 H/44 -26.3 31.5 43.5 12.0 227.2 52.8 P 11.7 H/44 -26.2 38.2 46.0 7.8 227.8 52.6 P 11.6 H/44 -26.2 37.9 46.0 8.1 240.1 52.1 P 11.8 H/44 -26.3 37.6 46.0 8.4 252.4 47.9 P 12.8 H/44 -27.6 33.2 46.0 12.8 276.5 43.9 P 13.1 H/44 -27.5 29.5 46.0 16.5 312.4 53.0 P 13.4 H/44 -27.5 38.9 46.0 7.1 336.4 40.0 P 14.0 H/44 -27.6 26.4 46.0 19.6 360.0 43.4 P 14.6 H/44 -27.4 30.6 46.0 15.4 384.0 51.7 P 15.5 H/44 -27.5 39.7 46.0 6.3 407.6 42.1 P 15.6 H/44 -27.4 30.3 46.0 15.7 443.4 43.1 P 17.2 H/44 -27.2 33.1 46.0 12.9 612.0 39.2 P 19.2 H/44 -26.8 31.5 46.0 14.5 684.0 34.7 P 20.3 H/44 -26.5 28.4 46.0 17.6 768.0 36.5 P 20.8 H/44 -26.1 31.2 46.0 14.8 935.0 33.3 P 22.3 H/44 -25.2 30.4 46.0 15.6 RP-7632 Rev. 1 Page 20 of 21

Radiometrics Midwest Corporation www.radiomet.com Testing of the Horizon Hobby, Model DX2E, 2.4 GHz Transmitter Meter Antenna Corr. Field Strength Margin Reading Dect. Factor Factors dBuV/m Under Limit Freq. MHz dBuV Type dB Pol/ ID# dB EUT Limit dB 43.2 39.0 P 15.3 V/44 -28.3 26.1 40.0 13.9 227.8 42.6 P 11.6 V/44 -26.2 28.0 46.0 18.0 229.2 41.6 P 11.6 V/44 -26.2 26.9 46.0 19.1 240.1 41.4 P 11.8 V/44 -26.3 26.9 46.0 19.1 360.0 48.2 P 14.6 V/44 -27.4 35.4 46.0 10.6 384.0 52.0 P 15.5 V/44 -27.5 40.0 46.0 6.0 407.6 45.8 P 15.6 V/44 -27.4 34.1 46.0 11.9 431.6 48.6 P 16.5 V/44 -27.4 37.7 46.0 8.3 444.0 53.8 Q 17.2 V/44 -27.2 43.7 46.0 2.3 467.5 42.9 P 17.1 V/44 -27.0 33.0 46.0 13.0 612.0 42.6 P 19.2 V/44 -26.8 35.0 46.0 11.0 768.0 40.2 P 20.8 V/44 -26.1 34.9 46.0 11.1 839.0 38.1 P 21.4 V/44 -25.8 33.7 46.0 12.3 911.0 40.3 P 22.0 V/44 -25.3 37.1 46.0 8.9 935.0 41.4 P 22.3 V/44 -25.2 38.5 46.0 7.5 983.0 38.1 P 22.9 V/44 -24.5 36.5 54.0 17.5 Judgment: Passed by 2.3 dB RP-7632 Rev. 1 Page 21 of 21


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