Y3J-U9920AIRCRAFT PUSH BACK FIXED PART GATEWAY CONTAINING DECT TRANSCEIVER (UPCS)

19541P‐41 (02‐11) ©2011 DAVID CLARK COMPANY INCORPORATED USER MANUAL Push Back Gateway U9920-GPB U9920-GPB(EU) (P/N: 40993G-01) (P/N: 40993G-02) 1 of 9 19541P‐41 (02‐11) C C a a u u t t i i o o n n s s a a n n d d W W a a r r n n i i n n g g s s READ AND SAVE THESE INSTRUCTIONS. Follow the instructions in this installation manual. These instructions must be followed to avoid damage to this product and associated equipment. Product operation and reliability depends on proper usage. DO NOT INSTALL ANY DAVID CLARK COMPANY PRODUCT THAT APPEARS DAMAGED. Upon unpacking your David Clark product, inspect the contents for shipping damage. If damage is apparent, immediately file a claim with the carrier and notify your David Clark product supplier. ELECTRICAL HAZARD ‐ Disconnect electrical power when making any internal adjustments or repairs. All repairs should be performed by a representative or authorized agent of the David Clark Company. STATIC HAZARD ‐ Static electricity can damage components. Therefore, be sure to ground yourself before opening or installing components. LI‐POLYMER ‐ This product is used with Li‐Polymer batteries. Do not incinerate, disassemble, short circuit, or expose the battery to high temperatures. Battery must be disposed of properly in accordance with local regulations. 2 of 9 19541P‐41 (02‐11) O O v v e e r r v v i i e e w w The U9920‐GPB (40993G‐01) Push Back Gateway is a portable wireless communication device that when used in conjunction with one or more U9910‐BSW (40992G‐01) or U9912‐BSW Wireless Belt Stations provides communication for up to four users as well as an interface to an aircraft intercom system. Only one gateway is required per system. Up to four belt stations can be connected to one gateway. Model U9920-GPB Push Back Gateway P/N 40993G-01 Rx Adjust Aircraft Connector Power Button Status LED Battery Compartment Battery Release Screw Link/PTT Button Figure 1: Overview of Gateway 3 of 9 19541P‐41 (02‐11) L L i i n n k k i i n n g g Before a belt station and a gateway can be connected, they must first be linked. As a security measure, the close‐link feature requires devices to be in proximity of about 1 to 3 ft (0.3 to 0.9m) in order to successfully link. This ensures that the units are not inadvertently linked with other units on the premises. Linking procedure: 1. Ensure power is on for both U9920‐GPB and belt station (see Power‐up/Power‐down) 2. Ensure units are within 1 to 3 ft (0.3 to 0.9m) of each other. 3. Simultaneously (within 1‐2 sec) press and release the PTT button on the U9920‐GPB and the belt station to link with. 4. Amber LED’s will flash on both devices. A momentary red LED indicates a successful close‐link. 5. Upon successful link the U9920‐GPB will attempt to establish a connection with the belt station. 6. Upon successfully establishing connection the LED on the gateway will flash a green pattern corresponding to the number of belt stations connected. Tip: Once linked, the devices will not need to be linked again unless they are purged (see Purging). Each belt station is able to be linked to only one gateway at a time. A gateway can have up to six belt stations linked and be connected to four of those six at one time. S S t t a a t t u u s s I I n n d d i i c c a a t t i i o o n n s s The power button has a multi‐color LED in the center which serves as a status indication for the gateway. Table 1 below lists these states. Table 1: LED Status Indications LED Color Blink Rate Status Red Solid Initializing/power up Red Once Connection Dropped Red Once Connection Established Red Any Low battery (approx. 1 hr remaining) Orange Slow Idle/Disconnected Orange Fast Link/Connection in Progress Orange Solid PTT asserted Green Slow Connected (pattern indicates number of belt stations connected) 4 of 9 19541P‐41 (02‐11) O O p p e e r r a a t t i i o o n n Power‐Up/Power‐Down To power up the U9920‐GPB Push Back Gateway, press and hold the POWER button for approximately two seconds. The LED will turn red and then begin flashing orange. If there are linked belt stations within range, they will automatically connect to the gateway in a few seconds after power up. To power down the U9920‐GPB, press and hold the POWER button for approximately two seconds. The LED will turn red and then turn off. The gateway is now powered down. Aircraft Interface The U9920‐GPB is designed for airport push back operations and can be connected to an aircraft intercom system. Once connected, up to four belt station (U9910‐BSW) users can communicate to the pilot of the aircraft by pressing the PTT button on the belt station. A Push Back Cable is required between the U9920‐GPB and the aircraft (cable P/N: 41035G‐02 included with gateway, standard 1/4" interphone connection). See Figure 2 below. Line up Orange Dots and Twist Figure 2: Push Back Cable Connection [additional figure showing aircraft interface] Aircraft Level Adjustment Audio levels can vary between aircraft. To compensate for this, the U9920‐GPB has a receive level adjust knob (see Figure 1). Turning this knob will increase or decrease the audio level coming from the aircraft and into the wireless intercom. By adjusting this knob, optimum performance can be achieved. 5 of 9 19541P‐41 (02‐11) Receive Level Adjustment Procedure 1. Connect at least one belt station to the U9920‐GPB gateway and ensure sidetone is present (see belt station User Manual). 2. Press and hold PTT 3. While holding PTT, begin speaking and slowly turn Receive Level Adjust knob on the U9920‐GPB gateway clockwise until you hear an echo of your own voice. 4. Turn the Receive Level Adjust knob slightly counter‐clockwise until the echo stops. 5. Release PTT. 6. You may wish to verify communication with the pilot or someone hard‐wired to the aircraft’s intercom. Communication Note: It is highly recommended for wireless push‐back systems that each headset user interface through a non‐VOX belt station (U9912‐BSW), as extremely high and varying noise …

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External Photos – U9920 Front Rear

Internal Photos – U9920 Circuit Board – Front Circuit Board – Rear Rear inside of product Transmitter Module – Front Transmitter without can Transmitter Module – Rear

Test Number: 125-11 Issue Date: 2/22/2011 Page 44 of 49 6. Measurement Data (continued) 6.11. Public Exposure to Radio Frequency Energy Levels (1.1307 (b)(1)) RSS-GEN 5.5, RSS 102 6.11.1. MPE Power Density Table. Power Density Channel MPE Distance (cm) DUT Output Power (dBm) DUT Antenna Gain (dBi) (mW/cm2) (W/m2) Limit (mW/cm2) Result (1) (2) (3) (4) (5) TX4 20 18.29 1.41 0.019 0.186 1 Compliant TX2 20 18.22 1.38 0.018 0.181 1 Compliant TX0 20 18.07 1.13 0.017 0.165 1 Compliant PD = OP + AG (4 x π x d²) PD = Power Density OP = DUT Output Power (dBm) AG = Antenna Gain (dBi) D = MPE Distance 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 6.3 of this test report. 3. Data supplied by the client. 4. Power density is calculated from conducted power output 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. Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.cw-inc.com

COMPLIANCE WORLDWIDE INC. TEST REPORT 125-11 In Accordance with the Requirements of Industry Canada RSS 213, Issue 2, December 2005 2 GHz License-exempt Personal Communications Service Devices (LE-PCS) Federal Communications Commission 47 CFR Part 15, Subpart D Technical Requirements for Unlicensed Personal Communication Systems (UPCS) Issued to David Clark Company, Inc. 360 Franklin Street, PO Box 15054 Worcester, MA 01615 For the Push Back Gateway Model Number: U9920 FCC ID: Y3J-U9920 IC: 9409A-U9920 Report Issued on February 22, 2011 This test report shall not be reproduced, except in full, without written permission from Compliance Worldwide, Inc. Compliance Worldwide, Inc. - 357 Main Street - Sandown, NH 03873 (603) 887 3903 Fax 887 6445 http://www.complianceworldwide.com Test Number: 125-11 Issue Date: 2/22/2011 Page 2 of 49 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 2.2. Model Number .......................................................................................................................................... 3 2.3. Serial Number ........................................................................................................................................... 3 2.4. Description ................................................................................................................................................ 3 2.5. Power Source ........................................................................................................................................... 3 2.6. Hardware Revision.................................................................................................................................... 3 2.7. Software Revision ..................................................................................................................................... 3 2.8. Modulation Type ....................................................................................................................................... 3 2.9. Operating Frequency ................................................................................................................................ 3 2.10. Emission Designator............................................................................................................................... 3 2.11. EMC Modifications .................................................................................................................................. 3 3. Product Configuration .........................................................................................................................................3 3.1. Operational Characteristics & Software .................................................................................................... 3 3.2. EUT Hardware .......................................................................................................................................... 3 3.3. EUT CablesTransducers........................................................................................................................... 3 3.4. Support Equipment................................................................................................................................... 4 3.5. EUT Diagram ............................................................................................................................................ 4 3.6. Test Setup Diagram .................................................................................................................................. 5 4. Measurements Parameters.................................................................................................................................5 4.1. Measurement Equipment Used to Perform Test ....................................................................................... 5 4.2. Measurement & Equipment Setup ............................................................................................................ 6 4.3. Measurement Procedure .......................................................................................................................... 6 4.4. Choice of Operating Frequencies ............................................................................................................. 6 5. Measurement Summary......................................................................................................................................7 6. Measurement Data .............................................................................................................................................8 6.1. Antenna Requirement ............................................................................................................................... 8 6.2. Type of Modulation and Access Protocol.................................................................................................. 8 6.3. Peak Transmit Power................................................................................................................................ 9 6.4. Emission Bandwidth................................................................................................................................ 12 6.5. Spurious Emissions at the antenna terminals ......................................................................................... 15 6.6. Power Spectral Density…

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Test Set up Photos – U9920 Radiated Front Radiated Rear High Frequency Radiated Rear Low Frequency Radiated Rear