Y3J-DCXBTAVIATION HEADSET 2.4 GHz BLUETOOTH INTERFACE

Futura Med w/Bernard Fashion Quick Reference Guide W W W. D AV I D C L A R K . C O M DCPRO MANUAL 5-10.indd 15/22/13 10:29 AM Congratulations on your purchase of the most technologically advanced electronic noise-cancelling headset available. As with all of our products, The DC PRO-X Electronic Noise Cancelling Headset is backed by extraordinary customer service and support. David Clark Company assumes full responsibility for the quality and performance of our products. We are committed to a policy of service whereby we will respond in a prompt and positive manner to any question or issue regarding one of our products. David Clark Company products have set the standards of performance and excellence for pilots throughout the world. Your new DC PRO-X continues this legacy. We have earned a reputation for excellence; we intend to keep it by continuing to deserve your confidence. Robert A. Vincent, President Thank you for purchasing the DC PRO-XHybrid Electronic Noise-Cancellation Technology Your DC PRO-X features leading-edge Hybrid Electronic Noise-Cancelling Technology (ENC) with feed-forward and feed-back technology for superior active noise reduction. Feed-forward noise cancelling is accomplished through an exterior microphone in the ear dome that is isolated from the speaker. The exterior microphone acquires the noise before it gets to the ear. Feed-back noise cancelling is performed by the internal microphone placed near the speaker. The signals are then inverted to produce a reverse, ‘anti-noise’ signal. This hybrid technology results in unsurpassed active noise reduction performance. External Microphone Internal Speaker Internal Microphone Amplifier Bluetooth & Audio DSP Inversion Circuit Inversion Circuit External Noise Signal Internal Noise Signal Cancellation Processor T H A N K Y O U . . . H Y B R I D E N C T E C H N O L O G Y 2 WWW.DAVIDCLARK.COM WWW.DAVIDCLARK.COM 3 Futura Med w/Bernard Fashion Anti-Noise Signal HYBRID DCPRO MANUAL 5-10.indd 2-35/22/13 10:29 AM DC PRO-X Features 1 3 2 5 6 7 10 9 4 12 ® Technologically Advanced. Intelligently Designed. 1. Very light, yet rugged magnesium alloy headband and suspension 2. Fully adjustable suspension assembly for personalized comfort 3. Ultra-soft leatherette head pad with breathable, vented design 4. Swivel hinge stirrups disperse clamping pressure for secure yet comfortable fit 5. Plush, ‘rest on ear’, Dura-Stitched leatherette ear seals reduce heat build up 6. Hybrid ENC technology for best-in-class active noise attenuation 7. Dual Voice Coil Drivers provide Fail-Safe operation to ensure full communication in the event of battery loss or system failure 8. Digital Signal Processing (DSP) Technology provides high- fidelity audio for superior communications and music listening 9. M-55 Electret Microphone with enhanced noise cancelling 10. Full flex boom for precise mic placement 11. Bluetooth ® wireless technology provides seamless integration for connecting to cell phones, MP3, tablets or other personal electronic devices 12. Collapsible design for compact storage in David Clark headset bag DC PRO-X Features H E A D S E T F E A T U R E S Futura Med w/Bernard Fashion 4 WWW.DAVIDCLARK.COM WWW.DAVIDCLARK.COM 5 Approved FAA TSO-C139 8 11 Bluetooth Control Module DCPRO MANUAL 5-10.indd 4-55/22/13 10:29 AM Control Module - Quick Reference Guide Power On/Off Volume Controls Bluetooth Mono/Stereo Switch Auto Shutoff Switch Power Press to turn unit on or off • Solid Yellow: Initializing • Pulsing Green: On • Pulsing Red: On, Low Batteries Volume Up/Down • Adjust listen level volume up or down • Left/right adjustments are independent • Only usable when power is on; Levels default to max when unit is off Mono/Stereo • Set per type of intercom/audio panel Auto Shutoff When set to ON, unit will turn off automatically after 5 minutes when: • Intercom/audio panel turned off • Not connected to intercom/audio panel • Not in a phone call Bluetooth ® Wireless Technology Press and hold for 2 sec. to turn on Bluetooth ® Wireless Technology: • Pulsing Purple: Initializing • Pulsing Green: On, Not Connected • Pulsing Yellow: Pairing Mode • Pulsing Blue: Paired and Connected To Pair: • Turn Bluetooth ® Wireless Technology on (pulsing green) • Press Bluetooth ® Wireless Technology button to enter pairing mode (flashing yellow) • Search for devices from your phone/device • Select DC PRO-X and initiate pairing on your device • If prompted for PIN code, enter 0 0 0 0 Control Module - Quick Reference Guide The Control Module is powered by two (2) ‘AA’ batteries for up to 50 hours of continuous use. C O N T R O L M O D U L E F E A T U R E S 6 WWW.DAVIDCLARK.COM WWW.DAVIDCLARK.COM 7 ® DCPRO MANUAL 5-10.indd 6-75/22/13 10:29 AM C O N T R O L M O D U L E D C P R O - X U S A G E 8 WWW.DAVIDCLARK.COM WWW.DAVIDCLARK.COM 9 Control Module Operation 1. Fail Safe - if batteries are dead or the unit is turned off, microphone and earphones will function when connected to aircraft intercom. 2. The DC PRO-X headset is shipped with the Auto Shutoff feature OFF. In this mode, the Hybrid ENC will function whenever the power is ON. 3. When Auto Shutoff is set to ON, unit will turn off automatically after 5 minutes when: • Intercom/audio panel turned off • Not connected to intercom/audio panel • Not in a phone call 4. Auto shutoff can be enabled/disabled via a small switch located under the batteries (see Quick Start diagram page 6). 5. External Audio Management • Aux audio is muted upon transmit or receive from intercom or radio to ensure priority of audio voice communications 6. Cell Phone Interface • All intercom parties hear cell phone outbound audio but cell phone recipient’s voice is heard only by the headset connected/paired to the cell phone • Sidetone is present when connected to aircraft intercom. Sidetone may not be (dependent on cell phone functionality) present when using the headset and cell phone when not attached to the aircraft intercom Proper Fitting The adva…

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David ----+ Clark Date: 19-June-2013 To Whom It May Concern: Letter Of Agency David Clark Company Incorporated 360 Franklin Street, Box 15054 Worcester, MA 01615-0054 Phone: 508-751-5800 Fax: 508-753-5827 www.davidclark.com Please be advised that David Truesdell of David Clark Company Inc. authorizes Larry K. Stillings, President of Compliance Worldwide, Inc. to act on our behalf, until otherwise notified, for applications submitted for the purpose of obtaining an FCC Grant of Equipment Authorization. We certify that we are not subject to denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse ACT of 1988, U.S.C. 862. Further, no party, as defined in 47 CFR 1.2002(b), to the application is subject to denial of federal benefits, that includes FCC benefits. Thank you for your attention to this matter. si g , na 7 V,,-, ;~! David Truesdell

David Clark Company Incorporated David 360 Franklin Street, Box /5054 _a----+ Worcester, MA 0/6/5-0054 Clark Phone: 508-75/-5800 Fax: 508-753-5827 www.davidc1ark.com Request for Confidentiality Date: 19-J une-13 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: Y3J-DCXBT Pursuant to Sections 0.457 and 0.459 of the Commission's Rules, we hereby request confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram Y3J-DCXBT BlkDia.pdf Schematics Y3J-DCXBT Schem.pdf Operational Description Y3J-DCXBT OpDes.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Pursuant to DA04-1705 June 15, 2004 of the Commission's public notice, we also require temporary confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Internal Photos Y3J-DCXBT IntPho.pdf Temporary confidentiality from public disclosure is important for David Clark Company Inc. from a commercial perspective. It enables the company to complete its development and regulatory efforts prior to introducing the product to the marketplace. Releasing information on the product via the FCC website prior to formal market introduction can be confusing to our customers and places the company at a competitive disadvantage.

External Photos – David Clark Model DC PRO-X

Internal Photos - Y3J-DCXBT Bluetooth module Bluetooth module

Test Number: 287-13 Issue Date: 5/17/2013 Page 50 of 51 Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.cw-inc.com 6. Measurement Data (continued) 6.11. Public Exposure to Radio Frequency Energy Levels (15.247(i) (1.1307 (b)(1)) RSS-GEN 5.5, RSS 102 Power Density MPE Distance (cm) DUT Output Power (dBm) DUT Antenna Gain (dBi) (mW/cm2) (W/m2) Limit (mW/cm2) Channel Frequency (1) (2) (3) (4) (5) Result 2402 2.5 4.83 1.0 0.0487564 0.4875637 1 Compliant 2441 2.5 2.79 1.0 0.0304812 0.3048115 1 Compliant 2480 2.5 2.64 1.0 0.0294463 0.2944634 1 Compliant • PD = Power Density (mW/cm 2 ) • OP = DUT Output Power (dBm) • AG = DUT Antenna Gain (dBi) • d = MPE Distance (cm) 1. Reference CFR 2.1093(b): For purposes of this section, a portable device is defined as a transmitting device designed to be used so that the radiating structure(s) of the device is/are within 20 centimeters of the body of the user. 2. Section 6.6 of this test report. 3. Antenna gain value for this product was reported by the client. 4. Power density is calculated from power measurement and antenna gain. 5. Reference CFR 1.1310, Table 1: Limits for Maximum Permissible Exposure (MPE), Section (B): Limits for General Population/Uncontrolled Exposure. OP + AG (4 x π x d²) PD =

Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.complianceworldwide.com COMPLIANCE WORLDWIDE INC. TEST REPORT 287-13R1 In Accordance with the Requirements of FCC PART 15.247, SUBPART C INDUSTRY CANADA RSS 210, ISSUE 8 Low Power License-Exempt Radio Communication Devices Intentional Radiators Issued to David Clark Company 360 Franklin Street Worcester, MA 01604 for the DC Pro X Hybrid Electronic Noise-Cancelling Aviation Headset 2.4 GHz Bluetooth Interface FCC ID: Y3J-DCXBT IC: 9409A-DCXBT Report Issued on May 17, 2013 Report Revision R1 Issued on July 19, 2013 Tested by This test report shall not be reproduced, except in full, without written permission from Compliance Worldwide, Inc. Test Number: 287-13R1 Issue Date: 7/19/2013 Page 2 of 51 Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.cw-inc.com Table of Contents 1 Scope ................................................................................................................................... 3 2 Product Details..................................................................................................................... 3 2.1 Manufacturer ............................................................................................................................ 3 2.3 Serial Number........................................................................................................................... 3 2.4 Description................................................................................................................................ 3 2.5 Power Source ........................................................................................................................... 3 2.6 EMC Modifications.................................................................................................................... 3 3 Product Configuration .......................................................................................................... 3 3.1 Operational Characteristics & Software ................................................................................... 3 3.2 EUT Hardware.......................................................................................................................... 4 3.3 Support Equipment................................................................................................................... 4 3.4 Cables ...................................................................................................................................... 4 3.5 Block Diagram .......................................................................................................................... 5 4 Measurements Parameters..................................................................................................5 4.1 Measurement Equipment Used to Perform Test...................................................................... 5 4.2 Measurement & Equipment Setup ........................................................................................... 5 4.3 Measurement Procedure .......................................................................................................... 6 5 Measurement Summary.......................................................................................................7 6 Measurement Data...............................................................................................................7 6.1 Antenna Requirement .............................................................................................................. 7 6.2 Number of Hopping Channels ..................................................................................................8 6.3 Minimum 20 dB Bandwidth....................................................................................................... 9 6.4 Frequency Hopping Channel Separation ............................................................................... 11 6.5 Average Time of Occupancy ..................................................................................................13 6.6 Maximum Peak Conducted Output Power ............................................................................. 17 6.7 Band Edge Measurements.....................................................................................................20 6.8 99% (Occupied) Bandwidth.................................................................................................... 25 6.9 Combined Spurious Harmonic Radiated Emissions .............................................................. 27 6.10 Spurious Radiated Emissions .............................................................................................. 28 6.11 Public Exposure to Radio Frequency Energy Levels ........................................................... 50 8 Test Site Description ......................................................................................................................... 51 Test Number: 287-13R1 Issue Date: 7/19/2013 Page 3 of 51 Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.cw-inc.com 1. Scope This test report certifies that the David Clark Company DC Pro-X Hybrid Electronic Noise- Cancelling Aviation Headset 2.4 GHz Bluetooth Interface, as tested, meets the FCC Part 15.247, and Industry Canada RSS 210, Issue 8 requirements. The scope of this test report is limited to the test sample provided by the client, only in as much as that sample represents other production units. If any significant changes are made to the unit, the changes shall be evaluated and a retest may be required. Revision R1: Added reference to FCC Public Notice DA-00 in section 4.3. Revised the 99% power bandwidth measurements in Section 6.8. Proper DUT operating mode and measurement span to RBW ratios were followed. 2. Product Details 2.1. Manufa…

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Test Set Up Photos – David Clark Model DC PRO-X Front Radiated Emissions Rear Radiated Emissions Rear Radiated - Horn Antenna Rear Radiated – Loop