Change Impact Analysis

FCC ID: 2ACTZMSS9019

Operational Description

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FCCID_4478037

LYNX HARDWARE CHANGE IMPACT ANALYSIS (HCIA) FOR POWER AMPLIFIER & RF SWITCH UPDATES Aviation Communication and Surveillance Systems CAGE Code Initial Release Date Revision Date Document Number Revision 1WYD3 07-Mar-2019 27-Aug-2019 8210332-001 A Proprietary Notice This document and the information disclosed herein are proprietary data of Aviation Communication & Surveillance Systems, LLC. Neither this document nor the information contained herein shall be reproduced, used, or disclosed to others without the written authorization of Aviation Communication & Surveillance Systems, LLC. Notice Freedom of Information Act (5 USC 552) and Disclosure of Confidential Information Generally (18 USC 1905) This document is being furnished in confidence by Aviation Communication and Surveillance Systems, LLC. The information disclosed herein falls within exemption (b) (4) of 5 USC 552 and the prohibitions of 18 USC 1905. Export Notice This technical data is controlled under the Export Administration Regulations (EAR) and may not be exported to a Foreign Person, either in the U.S. or abroad, without proper authorization by the U.S. Department of Commerce. Copyright 2019 Aviation Communication and Surveillance Systems, LLC. All Rights Reserved.

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Record of Revisions Rev Date Authorization Description of Change - 07-Mar-2019 ECR018849 Initial Release Changed document to reflect new FCC-driven creation of 9001305-002 for the STAC1011-350B A 19-Aug-2019 ECR018849 power amplifier and Mod C. Updated ACSS logo on title page. ACSS Use or disclosure of the information on this sheet is subject to the RR-1 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Table of Contents 1 INTRODUCTION ................................................................................................................................... 2 1.1 Purpose .......................................................................................................................................... 2 1.2 Scope .............................................................................................................................................. 2 1.3 Description of Equipment ............................................................................................................... 2 1.4 Referenced Documents .................................................................................................................. 5 1.5 Acronyms and Abbreviations .......................................................................................................... 7 2 CCA DESIGN UPDATE ......................................................................................................................... 8 2.1 Executive Summary ........................................................................................................................ 8 2.2 Description of Hardware Changes .................................................................................................. 8 2.2.1 Power Amplifier ....................................................................................................................... 9 2.2.2 RF Switch updates ................................................................................................................ 10 3 CHANGE ANALYSIS ........................................................................................................................... 15 3.1 Complex Electronic Hardware Changes....................................................................................... 15 3.2 Software Changes ........................................................................................................................ 15 3.3 Failure Functional Analysis ........................................................................................................... 15 3.4 TSO Change Impact Analysis ...................................................................................................... 15 3.5 Conclusion .................................................................................................................................... 15 4 ENVIRONMENTAL QUALIFICATION TESTING ................................................................................ 16 END OF DOCUMENT ................................................................................................................................. 17 ACSS Use or disclosure of the information on this sheet is subject to the TC-1 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Table of Figures Figure 1-1: NGT-9000 Platform Hardware Block Diagram ........................................................................... 4 Figure 1-2: RF Transmitter / Receiver Block Diagram .................................................................................. 4 Figure 2-1: Power Amplifier Schematic Excerpt ......................................................................................... 10 Figure 2-2: Schematic Excerpt, Transmitter Self-test Signal Routing......................................................... 11 Figure 2-3: Schematic Excerpt, Transmitter Feedback or Receiver Self-test ............................................. 11 ACSS Use or disclosure of the information on this sheet is subject to the TF-1 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Table of Tables Table 1-1: Summary of Hardware Modifications ........................................................................................... 2 Table 1-2: Lynx Hardware LRUs Affected .................................................................................................... 2 Table 1-3: Referenced Industry Documents ................................................................................................. 5 Table 1-4: Referenced ACSS Documents .................................................................................................... 6 Table 1-5: Acronyms and Abbreviations ....................................................................................................... 7 Table 2-1: Datasheet Specification Comparison ........................................................................................ 13 Table 2-2: 9002396-001 Switching Speed over Temperature. ................................................................... 14 Table 4-1: Summary of Environmental Test Conditions ............................................................................. 16 ACSS Use or disclosure of the information on this sheet is subject to the TT-1 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 1 INTRODUCTION 1.1 Purpose This Hardware Change Impact Analysis (HCIA) documents the hardware modifications, summarized in Table 1-1, due to long lead times and/or obsolescence. Table 1-1: Summary of Hardware Modifications No. Assembly Description of Modification 1 Circuit Card Assembly – P/N 9020020-003 is revised to allow using the 9002396-001 NGT-9000D+ HMC284 RF switch in place of the 9000783-001 AS186-302LF RF switch. The new switch has one less ground connection, but is otherwise physically equivalent and functionally has negligible differences. 2 Transistor, RF, High Power, Replaced P/N 9001305-001 with the 9001305-002 STAC1011- LDMOS 350B. The original part is the STAC1011-350A. Both parts use the same die, but the manufacturer changed the package, lead frame, and lead plating to address manufacturing yield and obsolescence issues. The 9001305-002 part number results from the need to identify LRUs with MOD C, not from any significant difference between the STAC1011-350A and STAC1011-350B. Table 1-2: Lynx Hardware LRUs Affected Part Number Hardware Mod Input Power Unit Size Affected CCAs 9200-17000-01 C DC Panel Mount 9020020-003, Remote 9200-17500-01 C DC 9020020-003, Mount All design changes were analyzed for impact to each applicable TSO. The engineering analysis categorizes the impacts to each TSO as one of the following (per 14 CFR 21.619):  Minor Impact - the applicable change has a minor impact on the TSO function. It does not require a major reevaluation of the substantiation data to demonstrate compliance to the TSO requirements.  Major impact - the applicable change has a major impact on the TSO function and does require a major reevaluation of the substantiation data to demonstrate compliance to the TSO requirements. 1.2 Scope This HCIA applies to the Lynx product line, and provides justification for the Major/Minor TSO change classification of the hardware modification. 1.3 Description of Equipment The LYNX Platform hardware was developed by Aviation Communications and Surveillance Systems (ACSS) in Phoenix, Arizona, USA. A top-level, hardware block diagram of the Lynx Platform hardware is ACSS Use or disclosure of the information on this sheet is subject to the Page 2 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A shown in Figure 1-1. An additional block diagram detailing the functions specific to the RF processing is shown in Figure 1-2 because this diagram explicitly shows the coaxial interfaces to the antennas. The following CCAs are used for implementing the functions:  Circuit Card Assembly –NGT-9000D+ This single Circuit Card Assembly provides the internal signal routing to all internal assemblies within the LRU, the display (if installed), and to the external connector. This assembly includes the 12-28VDC power supply input filtering and conversion to regulated outputs. The CCA Assembly also hosts the application software and contains all of the hardware for RF and I/O processing. This includes interfacing with an optional UAT/GPS receiver that is unaffected by current changes to the CCA Assembly. Additionally, the CCA Assembly contains the circuitry to process both received and transmitted 1030MHz and 1090MHz RF signals. Received 1030MHz and 1090MHz signals are converted to a filtered intermediated frequency and routed to A/D converters for digitization and processing. The transmitter RF circuitry up-converts, filters, and amplifies the modulated signal provided by the digital circuitry via a D/A converter. POWER SUPPLY DC-DC DC-DC +14V Power Interrupt +8V Buck Buck 6000uf A/C Power EMI/Surge DC-DC DC-DC DC-DC PA +36V +17V +34V 12-28VDC Protect Buck/Boost Boost Boost 7000uf DC-DC -52V Boost PA +28V DC-DC +5V DC-DC 1000uf Buck +3.3V +1.0V FPGA Buck SUPPRESSION BUFFER 1 DC-DC Buck DC-DC +1.8V FPGA RS-232 OUTPUT 2 Buck DC-DC +12V RS-232 INPUT 3 Buck/Inv -12V Switch +3.3V I/O A429 OUTPUT DEI1072 1 +5V -52V A429 INPUT DEI1044-G 4 RF BLOCK DIAGRAM ARTIX 100T DISC OUTPUT 6 RF I/O PIN TX_PIN_TOP FPGA DIODE RX_PIN_TOP SWITCH TX_PIN_BOT DISC INPUTS 17 DRIVERS RX_PIN_BOT RS-422 I/O 1 1 ADC_MUX_CNTL ADMUX RF SELF-TEST ADC SPI BUS TX SELF-TEST FWD_PWR_SEL ANALOG ANALOG PS MUX MONITORS ADG708 1030/1090_CNTRL TX TX_BEARING CAL MODULATION TX_D/A BUS OSC 144MHz PROCESSOR TPS65951 26MHz ADCIN2 OSC AM-3715 BUFFER GPMC BUS I2C (CONTROL) XTAL 144MHz 32.7660 POWER TX_EN McBSP (AUDIO) KHz CURRENT_SENSE_ENABLE eMMC Memory MMC AMPLIFIER DAC SPI BUS 4GBytes USB ULPI 12W AUDIO 600 OHM AUDIO AMP LOCAL LO TUNING BUS 16KB USB OTG I2C OSCILLATOR 64MHZ EEPROM OSC 512MB SDRAM 64MHz 64MHZ FPGA SDRAM BUS BUFFER TOP RX /FRONT END I2C I2C BUFFER DCM LTC2293 A/D TOP 1090 A/D BUS TOP RX RS-232 RX / TX RS-232 MAINT #1 TOP 1030 A/D BUS RS-232 RX / TX RS-232 MAINT #2 BOT RX /FRONT RX_TR_L END VIDEO BUS 4 WIRE RES BOT/SUM RX SPI TOUCH SCREEN CONTROLLER LTC2293 A/D TOP RX BOT 1090 A/D BUS BOT 1030 A/D BUS UAT/GPS VIDEO BUS 1 (400X240) VIDEO BUS 2 (400X240) 1200 R Mode ALT ADS-B ON 2nm +24 LVDS BUS LCD BACKLIGHT CONTROL PALT 13000 ft RX CCA GPS TIME MARK ID N333TL TAS ABV -08 -01 0 1 2 3 4 5 6 7 ACSS Use or disclosure of the information on this sheet is subject to the Page 3 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Figure 1-1: NGT-9000 Platform Hardware Block Diagram 916MHz -5dBm LOCAL OSCILLATOR – 1204MHz 916MHz -7.5mA 916MHz TOP ANTENNA 0dB 916MHz +5dBm +13dBm 5dB 0dB -7dBm OMNI SKYWATCH TOP 1030 SPLITTER TX LO LO TUNING 0dB Synthesizer/ (RES) Splitter RF BUS VCO TOP 1090 GP2S1+ Amp SPLITTER RF Switch ADF4360-6 64MHz 0dB (RES) AS186-302 ABA-53563 BOT 1030 G=21.5dB SPLITTER 0dB P1dB=15dBm (RES) RX_MIXER_EN 9dB BOT 1090 RF SELF-TEST ß +0dBm à +25dBm 10dB FWD_PWR_SEL ß -20dBm ADC_MUX_CNTL ß +0 to -11dBm TX BEARING_CAL TX SELF-TEST à +25dBm 9dB 9dB à +18dBm ANTENNA AD7276AYRA 9000 BASE CAL RF SWITCH Log RF Switch RF Switch SPLITTER 13290- AMP 4-1 MUX 12bit ADC SPI AS186-302 AS186-302 (RES) 313LF DG203 A/D BUS SUM DELTA 9000D+ MAX4003 POWER AMPLIFIER TX 4dB +36V +28V MODULATION TX SELF-TEST 1030/1090_CNTRL 1030/1090_CNTRL RF I/O AD8216 AD8216 SWITCH I-SENSE I-SENSE 3dB RX_PIN_TOP 1030MHz 1030MHz RF Switch RF RF Switch RF Switch λ/4 CERAMIC CERAMIC 20dB RF AS186-302 AMP AS186-302 4dB AS186-302 I_SENSE_EN_L I_SENSE_EN_L AMP λ/4 λ/4 ABA-53563 MGA-31389 G=21dB 1090MHz +5dBm LPF G=21dB P1dB=15dBm TX_PIN_TOP 1030MHz +8dBm 1090MHz 1090MHz LDMOS LDMOS LDMOS P1dB=22dBm SAW SAW TX LO λ/4 λ/4 STAC1011-350 PD57018-E MW6S004NT1 4dB 4dB 3dB G=15dB G=16dB G=18dB 144MHz LPF @+55dBm @+40dBm @+24dBm TX_PIN_BOT RF RF λ/4 TX_EN TX_EN TX_EN AMP AMP D/A ADL-5350 250MHz LPF 250MHz LPF 70MHz HPF ETC1-1T 1 POLE LC ABA-56563 1 POLE LC 2 POLE LC ADA-4643 QUAD 12- G=-7dB G=21dB G=17dB AD-9707 14b BIT DAC RX_PIN_BOT DAC SPI P1dB=15dBm P1dB=13dBm MAX5715 114MHz (1090) BUS 1090MHz -5dBm 114MHz +5dBm 114MHz -5dBm 174MHz (1030) 1030MHz -3dBm 174MHz +2dBm 174MHz -9dBm TOP RX FRONT END 1090MHz ADS-B/TAS RECEIVER LTC2293 RX_TR_L (TOP RX) RF SWITCH 1030MHz XPDR RECEIVER 1060MHz 13290- LNA FILTER 313LF BOT RX FRONT END 1090MHz ADS-B/TAS RECEIVER LT5525 BOT/SUM RX TEMP COMP PAD P1dB = 7dBm 1090MHz RX_TR_L 3dB 3dB 2dB G = -3dB 2dB 2dB AN7-5N6 FILTER RF SWITCH RF SWITCH RF RF RF SPLITTER 13290- 13290- LNA AMP AMP AMP GP2S1+ 64MHz 313LF 313LF 1090MHz 1090MHz 174MHz BPF ADA-4643 ADA-4643 MGA-62563 ADA-4643 SAW SAW 2 POLE LC G=17dB G=17dB LTC2293 G=16dB G=17dB IL = 4dB P1dB=13dBm 916MHz LO P1dB=7dBm P1dB=13dBm P1dB=13dBm 1060/978MHz 12b DIPLEXER A/D 1030MHz XPDR RECEIVER 2dB 4dB 2dB LT5525 2dB ETC1-1-13 RF 12b UAT/GPS RX CCA RF AMP A/D UAT_RF LVDS BUS AMP GPS TIME MARK 114MHz BPF +5VDC 1030MHz ADA-4643 1030MHz ADA-4643 GPS_RF 2 POLE LC ETC1-1-13 SAW G=17dB SAW G=17dB Populate for 9000D, +, D+ IL = 4dB P1dB=13dBm 916MHz LO P1dB=13dBm Figure 1-2: RF Transmitter / Receiver Block Diagram ACSS Use or disclosure of the information on this sheet is subject to the Page 4 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 1.4 Referenced Documents Table 1-3: Referenced Industry Documents Source Document Rev/Date Description No. ARINC 429 1999 Mark 33 Digital Information Transfer System (DITS) February ARINC 718A Mark IV Air Traffic Control Transponder (ATCRBS/Mode-S) 15, 2002 ARINC 735B 12/14/2007 Traffic computer TCAS and ADS-B functionality RTCA DO-160G 12/08/2010 Environmental Conditions and Test Procedures for Airborne Equipment RTCA DO-181E 03/17/2011 Minimum Operational Performance Standards for Air Traffic Control Radar Beacon System/Mode Select (ATCRBS/Mode S) Airborne Equipment RTCA DO-229D 12/13/2006 Minimum Operational Performance Standards for Global Positioning System/Wide Area Augmentation System Airborne Equipment RTCA DO-197A 09/12/1994 Minimum Operational Performance Standards for an Active Traffic Alert and Collision Avoidance System I (Active TCAS I) RTCA DO-254 04/19/2000 Design Assurance Guidance for Airborne Electronic Hardware RTCA DO-260B 12/02/2009 Minimum Operational Performance Standards for 1090 MHz Extended Squitter Automatic Dependent Surveillance – Broadcast (ADS-B) and Traffic Information Services – Broadcast (TIS-B) RTCA DO-282B 12/2/2002 Minimum Operational Performance Standards for Universal Access Transceiver (UAT) automatic Dependent Surveillance Broadcast (ADS-B). ACSS Use or disclosure of the information on this sheet is subject to the Page 5 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Table 1-4: Referenced ACSS Documents Source Document No. Rev Description NGT-9000 Environmental Qualification Evaluation Test Plan ACSS 8020130-006 - and Procedures ACSS 8020132-001 - NGT-9000 FCC Test Plan and Procedures NGT-9000 FCC Test Plan and Procedures Power Amp ACSS 8020132-002 B Qualification ACSS 9000783-001 - Switches, SPDT ACSS 9001305 C 350W LDMOS Transistor ACSS 9002396-001 - Microcircuit, RF Switch, SPDT ACSS 9020020-003 G Circuit Card Assembly – NGT 9000D+ ACSS 9029000-20000 J NGT-9000RD End Item Assembly ACSS 9029000-40000 J NGT-9000D End Item Assembly ACSS 9200-17000-01 AG Transponder Panel Mount With Diversity ACSS 9200-17500-01 R Transponder Remote Mount With Diversity ACSS Use or disclosure of the information on this sheet is subject to the Page 6 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 1.5 Acronyms and Abbreviations Table 1-5: Acronyms and Abbreviations Acronym Description AC Alternating Current ACSS Aviation Communication and Surveillance Systems ADS-B Automatic Dependent Surveillance-Broadcast AF Audio Frequency ARINC Aeronautical Radio, Incorporated CCA Circuit Card Assembly CFR Code of Federal Regulations DC Direct Current ECR Engineering Change Request EMI Electromagnetic Interference EQT Environmental Qualification Testing ESD Electrostatic Discharge FCC Federal Communications Commision HCIA Hardware Change Impact Analysis kHz Kilohertz LED Light Emitting Diode LRU Line Replaceable Unit MCU Modular Concept Unit MHz Megahertz Mod Modification N/A Not Applicable PSA Power Supply Assembly PTT Push to Talk P/N Part Number RF Radio Frequency RFA Radio Frequency Transceiver Assembly RIA Rear Interconnect Assembly RTCA Radio Technical Commission for Aeronautics SW Switch TPA Transponder Processor Assembly TSO Technical Standard Order VAC Volts Alternating Current VDC Volts Direct Current ACSS Use or disclosure of the information on this sheet is subject to the Page 7 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 2 CCA DESIGN UPDATE 2.1 Executive Summary The manufacturer of the 9000783-001 RF switch, Skyworks Solutions Inc., notified ACSS in February 2018 that the RF switch would be discontinued, with the last shipment in March 2019. The switch described by part number 9002396-001, made by Analog Devices under the HMC284AMS8G part number, is appropriate for use in the same applications, and will be used to support future production. In addition, the manufacturer of the 9001305-001 RF power amplifier, STMicroelectronics, notified ACSS in January 2018 that they would be modifying the power amplifier packaging to address manufacturing yield and obsolescence issues. They are not modifying the die used to create the amplifier. This new version of the part is provided by the manufacturer as a form, fit, and function replacement for the power amplifier, and will be used as part number 9001305-002. Both devices have the same footprint as the parts they replace and are not anticipated to affect the manufacturing process. Data provided by the manufacturers show equivalent performance, and engineering evaluations have also been performed without demonstrated issues. The data indicates that the component changes are low risk, but to ensure continued compliance with certification baselines additional environmental testing will be performed. The RF power amplifierchange is being implemented as Hardware MOD C due to FCC certification considerations rather than any significant hardware impact. The original FCC certification has some defects that, when combined with more recent guidance from the FCC, result in resubmitting for FCC certification under a different FCC identifier. 2.2 FCC Considerations The Lynx products were originally certified with data obtained via test procedure 8020132-001 and under the FCC ID 2ACTZMSS90. Subsequent review of recent guidance updates provided by the FCC as well as the original submittal revealed two issues: 1) The submittal incorrectly identified the Lynx products as being Maritime Transponders. 2) The FCC mandates that retested equipment can use the same identifiers as long as the test data matches the prior test results within 3dB. The prior test results incorrectly presented radiated emission levels at the noise floor and prevent subsequent test results from ever being within 3dB of the prior results. To rectify the certification basis the Lynx products are being retested and will be resubmitted under the FCC ID 2ACTZMSS9019. This change necessitates a change in the labels as well as a hardware modification change to be able to track those LRUs covered by the new FCC ID. The label and modification changes are instituted at the end item level described by part numbers 9029000-20000 and 9029000-40000. Since the basis of recertification includes the new STAC1011-350B, the 9001305 document is updated to describe the new part as the ACSS P/N 9001305-002. This new number causes revision of the 9020020- 003 CCA, which may then be used to validate and track those LRUs conforming to hardware modification C. 2.3 Description of Hardware Changes The 9020020-003 bill of materials is revised to allow the use of the 9002396-001 in lieu of the 9000783- 001 RF switch. No changes to manufacturing processes or tests are required because the size, weight, ACSS Use or disclosure of the information on this sheet is subject to the Page 8 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A and construction are unaffected. No schematic or assembly documentation changes are required. The affected reference designators are U17, U66, U68, U69, U70, and U71. The update to the RF amplifier is accomplished by revising the 9001305 document to include the 9001305-002 component. The 9020020-003 CCA is then updated to use the 9001305-002 (STAC1011- 350B). The reference designator (Q73) and all assembly notes remain unchanged, only the parts list is affected. The 9020020-003 CCA is used by all versions of NGT-9000 LRUs, so updating the single CCA addresses the component issues in all LRUs. The specific function of the components at each reference designator is described in the following sections. 2.3.1 Power Amplifier The power amplifier, Q73, provides the final amplification of modulated 1030MHz and 1090MHz, TAS and Transponder signals, to either the top or bottom antennas via PIN diode switches. The amplifier, shown in schematic excerpt Figure 2-1, and does not result in any additional component changes or modifications. STMicroelectronics Inc. provided information about the package changes as well as early issues with oscillations in a document titled “STAC1011-350A Package Update5.pdf”, which is archived with this document within AIM. Subsequently, STMicroelectronics provided environmental performance test data on the updated component that included temperature, vibration, and shock testing on multiple samples in the document “STAC1011-350B-STAC780-Final Reliability Report.pdf” which is also archived with this document in AIM. ACSS performed temperature testing using a hold-down mechanism which facilitated testing multiple amplifiers. Since solder was not involved, the hold-down mounting allowed the devices to oscillate. However, when mounted flush and with good CCA contact, the amplifiers met power and pulse fidelity requirements over temperature. Test data describing these tests and the results are included with this document in AIM in the document “Final Report on MLT PA Issues 2018.doc”. The mechanical differences between the packages have been compared with no significant issues found. The dimension differences are shown in the included document “NGT-9000 PA 9001305-001 Package Dimension Differences.xlsx”. The Design For Manufacturing analysis by Manufacturing Engineering and TTE China did not reveal any issues as shown in the email “RE: NGT-9000 PA 9001305-001 Package Dimension Differences.xlsx”, also included in AIM. ACSS Use or disclosure of the information on this sheet is subject to the Page 9 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Figure 2-1: Power Amplifier Schematic Excerpt 2.3.2 RF Switch updates The RF switches are used to for several functions including self-calibration, self-test, and controlling signal filter paths. U69 and U70, as shown in Figure 2-2, direct small signal RF to either the 1030MHz or 1090MHz bandpass filters. These signals may be used for self-calibration, self-test, or for amplification and transmission depending on the state as controlled by the FPGA. Key characteristics for each switch are greater than 20dB isolation between the selected and unselected switch outputs so as to meet spectral mask requirements (40dBc) and switching times less than 600ns to support DO-181E transponder reply delay requirements. U71 selects directing the filtered small signal RF to either be amplified for transmission or used for either calibration or self-test. In LRUs without the TAS function enabled, the switch may be bypassed by the resistors shown in the dashed-line squares because the 1030MHz transmissions are not needed. The key characteristic for the switch are greater than 20dB isolation between the selected and unselected switch output. U68 directs self-test and calibration signals to either a 50ohm resistor or U17, the antenna Cal switch. The key characteristic for the switch is isolation greater than 20dB, as this switch assists in preventing undesired coupling to and from antenna ports. U17 both isolates the self-test and transmitter filtering circuitry from the transmitter feedback signal while transmitting as well as directing the self-test signals between the antenna calibration port or to the receiver self-test switch. The key characteristics for the switch is isolation greater than 20dB. The self-test switch, U66, directs the receiver self-test signals to either the top or the bottom antenna inputs or, when transmitting, directs the transmitter forward power feedback signal from the correct antenna. The key characteristic is switch isolation greater than 20dB to ensure that the correct top/bottom path is used for both self-test and transmitter feedback. The schematic excerpts for these switches are shown in both Figure 2-2 and Figure 2-3. ACSS Use or disclosure of the information on this sheet is subject to the Page 10 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Figure 2-2: Schematic Excerpt, Transmitter Self-test Signal Routing Figure 2-3: Schematic Excerpt, Transmitter Feedback or Receiver Self-test ACSS Use or disclosure of the information on this sheet is subject to the Page 11 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A A comparison of the manufacturer’s datasheet specifications as shown in Table 2-1 demonstrated that the 9002396-01 meets or exceeds all of the stated specification except: 1) Noise BW: This is irrelevant as all applications are both narrowband and near 1GHz. 2) Isolation: The 9002396-001 has 9dB less isolation nominally, but has enough to ensure normal operation. This is demonstrated by failure-free operation over all the operating modes during temperature testing. 3) Control voltage: The control voltage maximum is 1/2V lower than the 9000783-001, but as the switch is driven by signals derived from regulated 5V sources, the 67% derating is well within the desired 80% guidelines. 4) Power input: The 9002396-001 maximum is 250mW (26dBm) vs 1000mW (30dBm) for the 9000783-001. The component most at risk is U66 because it is closest to the signal path of the very high power transmitted signal. The switch is isolated from the transmitted signal by both the directional coupler (20dB isolation) and the resistive 14dB attenuator. Thus, to exceed 250mW(26dBm), the transmitter would need to generate 26dBm + 20dB + 14dB = 60dBm (1000W). The power amplifier is only rated for 350W and is further isolated from the directional coupler by PIN diode switches and PCB losses. The reduction in maximum power handling capability still maintains high margins. 5) The 9000783-001 component specifies the switch will operate at 3V, while the 9002396-001 does not specify a lower limit. In addition, the manufacturer datasheet specifications were compared against design parameters used in the transmitter design “budget”. The 9002396-001 will meet the budget values, in some cases with more margin than the existing 9000783-001. ACSS Use or disclosure of the information on this sheet is subject to the Page 12 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 9000783-001 9002396-001 Skyworks ADI AS186- TX 302LF Budget HMC284AMS8 Control Voltage (V) 5 5 5 Current (mA) Insertion Loss Nom. (dB) -0.9 -0.8 -0.5 Insertion Loss Min at Cold (dB) -0.7 Insertion Loss Max at Hot (dB) -1.05 -1 -0.6 NF nom (dB) 0.8 NF T hot (dB) 1 P-1 dB (dBm) 28 30 28 P-1 dB Cold (dBm) 28.5 30 Output IP3 (dBm) 46 46 49 Noise BW (MHz) 4000 1000 3500 Switching Speed (ns) 50 20 Isolation (dB) -55 -46 Absolute Max Control Voltage (V) 8 7.5 Id (mA) Pin (dBm) 30 26 Hot Switch Level (dBm) 18 Iref (mA) Pdiss (mW) Storage Temp (C) -65 to 150 -65 to 150 Package MSOP-8 MSOP-8 Table 2-1: Datasheet Specification Comparison To verify the switching speed of the 9002396-001 demonstration card was obtained from the manufacturer. In the LRU, a differential driver (DS26C31) converts single ended logic signals from the FPGA to the differential signals needed by the RF switch devices. This differential driver can interact with the RF switch to affect switching time, so the combination of the switch on the demonstration card and driver was tested over temperature. The data from this testing is in the file “HMC284 Demo Card data.xls”, and is archived in AIM with this document. A summary of the test results is shown in Table 2-2, which demonstrates that the combined switch speed is much faster than the 600ns PIN diode switches as well as being very consistent over temperature. ACSS Use or disclosure of the information on this sheet is subject to the Page 13 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A THL = time from 50% to RF falls 20dBc. TLH = Time from 50% to RF rises to -1dBc. THL TLH T chamberTime File Name Time File Name +25C 36ns Screen0024.BMP 76ns Screen0023.BMP 100C 40ns Screen0052.BMP 80ns Screen0025.BMP -50C 34ns Screen0053.BMP 70ns Screen0054.BMP Table 2-2: 9002396-001 Switching Speed over Temperature. Additional temperature testing was performed on a related product. A T3CAS 9005000-55 TEQ01118 was selected to screen for suitability in this application because: 1) T3CAS is the source design from which the Lynx circuits were copied, and uses the same switch drivers and 5V rails. 2) T3CAS uses 29 of the RF switches, so it provides more opportunities to demonstrate issues if they exist. 3) The T3CAS product has higher power transmissions and is specified for more sensitive receptions than the Lynx product. Again, it provides more opportunities to demonstrate issues. The T3CAS LRU was calibrated in the factory and shown to pass all pre-test, ESS, and final tests. The RF switches were then replaced with the proposed 9002396-001 and the tests repeated without recalibration. All factory tests again passed without any noted degradation. The factory test data is included in AIM with this document. ACSS Use or disclosure of the information on this sheet is subject to the Page 14 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 3 CHANGE ANALYSIS 3.1 Complex Electronic Hardware Changes No Complex Electronic Hardware changes occurred. 3.2 Software Changes No software changes occurred. 3.3 Failure Functional Analysis There is no known Lynx Failure Functional Analysis due to the changes. 3.4 TSO Change Impact Analysis The Lynx product is approved to the following TSOs:  ATCRBS/Mode S Transponder Function: o TSO-C112d  Airborne Multipurpose Electronic Display Function (9029000-20000 only): o TSO-C113a  GPS Function: o TSO-C145c  Traffic Advisory (TAS) Function: o TSO-C147  Universal Access Transceiver (UAT) Function: o TSO-C154c  Flight Information Services-Broadcast (FIS-B) Function: o TSO-C157a  Automatic Dependent Surveillance-Broadcast (ADS-B) Function: o TSO-C166b  Avionics Supporting ADS-B Operation Function: o TSO-C195a The impact of the change affects hardware only. Because of this, all TSO related hardware functions will be validated via system level testing during the applicable environments. The hardware changes described herein do not meet the 14 CFR 21.619(b) Major change criteria of requiring a substantially complete investigation to determine compliance with the applicable TSO’s. Therefore, the 9029000-XXXXX HW Mod C is a Minor TSOA change. 3.5 Conclusion All changes affect hardware only and has an insignificant affect with regards to the functionality and manufacturability of the LRU. Therefore, it is submitted as a Minor change impact Category 3. ACSS Use or disclosure of the information on this sheet is subject to the Page 15 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A 4 ENVIRONMENTAL QUALIFICATION TESTING Environmental Qualification Testing (EQT) Emissions and Susceptibility will be performed on the Lynx panel mount P/N 9200-17000-01 LRU according to the DO-160G environmental categories summarized in Table 4-1 and as described in the procedure document 8020130-006. The Panel mount LRU was selected for EMI testing because all affected hardware is in common between the panel mount and the remote LRU (P/N 920-17500-001), the panel mount includes the added complexity of the display, and because the display increases the aperture and hence the risk during EMI testing. Temperature and Humidity may be performed using either the Remote Mount (P/N 920-17500- 01) or the panel mount because the affected components are used in exactly the same manner on both assemblies. Performance under environmental conditions based on the various TSO requirements is specified in the Environmental Qualification Test Plan and Procedures, 8020130-006. However, unlike previous qualification efforts, during EMI and Susceptibility the panel mount LRU will be tested with the cable connectors facing the antennas because of a change to the installation kit planned to be evaluated concurrently with the changes described in this document. Additionally, since the power amplifier change could affect the results of FCC mandated tests, these tests will also be performed to evaluate the impact. This testing, described in 8020132-002, includes transmitter power, modulation, occupied bandwidth, and spurious emissions. Radiated spurious emission testing is performed on both the NGT-9000D (panel mount) and the NGT-9000RD (remote mount) due to differences in the display and mounting orientation. The same CCA’s/connectors/cables are used on both panel and remote mount LRUs, so testing involving the RF cables may be tested on only one version and be applicable to both LRU versions. Table 4-1: Summary of Environmental Test Conditions Means of DO-160G Section Justification Compliance The functionality of the new components will be tested over the specified temperature range. Since RF 4.5.1 transmissions and receptions are what are affected by thru Temperature Test the proposed changes, the RF Susceptibility operational 4.5.4 tests will be used to verify performance during this testing. No retest needed. The proposed replacements are the 4.5.5 In-Flight Loss of Cooling Analysis same size, mounting, and technology with no changes in power dissipation or part temperature rating. No retest needed. The proposed replacements are the Altitude, Decompression, & 4.6 Analysis same size, mounting, and technology with no changes Overpressure in power dissipation or part temperature rating. The functionality of the new components will be tested over the specified temperature variation range. Since RF transmissions and receptions are what are affected 5 Temperature Variation Test by the proposed changes, the RF Susceptibility operational tests will be used to verify performance during this testing. Humidity will be retested per 8020130-002 because of the repackaging of the power amplifier. Since RF transmissions and receptions are what are affected by 6 Humidity Test the proposed changes, the RF Susceptibility operational tests will be used to verify performance during this testing. No retest needed. The mass and physical geometry of 7.1 Operational Shocks Analysis the components are nearly the same as the former components. ACSS Use or disclosure of the information on this sheet is subject to the Page 16 proprietary notice on the title page. Proprietary

Doc Number Lynx Hardware Change Impact Analysis (HCIA) Revision 8210332-001 For the Power Amplifier & RF Switch Updates A Means of DO-160G Section Justification Compliance No retest needed. The mass and physical geometry of 7.2 Crash Safety Analysis the components are nearly the same as the former components. No retest needed. The mass and physical geometry of 8 Vibration Analysis the components are nearly the same as the former components. 9 Explosive Atmosphere Not Required Product not certified to these requirements. 10 Waterproofness Not Required Product not certified to these requirements. 11 Fluids Susceptibility Not Required Product not certified to these requirements. 12 Sand and Dust Not Required Product not certified to these requirements. 13 Fungus Not Required Product not certified to these requirements 14 Salt Spray Not Required Product not certified to these requirements. No retest needed. The proposed replacements are the 15 Magnetic Effect Analysis same size, mounting, and technology with no addition of nickel, iron, or ferrous material Power Input – Electrical No retest needed. The component changes are not on 16 Power Input Parameter Limits Analysis the DC power input and do not affect power supply (DC) loading in any way. No retest needed. The component changes are not on 17 Voltage Spike the DC power input and do not affect power supply Analysis loading in any way. No retest needed. The component changes are not on 18 AF Conducted Susceptibility Analysis the DC power input and do not affect power supply loading in any way. No retest needed. The component changes are not on 19 Induced Signal Susceptibility Analysis the DC power input and do not affect power supply loading in any way. Radiated susceptibility will be performed. Test All updates relate to the RF switching and reception of (Radiated) transmitted and received frequencies. These 20 RF Susceptibility frequencies of interest and their harmonics are well Not above 400MHz, the maximum test frequency for Applicable conducted susceptibility. No conducted tests is (Conducted) required because of the low upper frequency at which testing is performed. Radiated emissions testing will be performed. Test All updates relate to the RF switching and reception of (Radiated) transmitted and received frequencies. These 21 Emission of RF Energy frequencies of interest and their harmonics are well Not above 152MHz, the maximum test frequency for Applicable conducted emissions. No conducted tests are required (Conducted) due to the low upper frequency of conducted emissions testing. Lightning Induced Transient No retest needed. None of the changes are on 22 Susceptibility, including Analysis interface circuitry or are part of the protection against customer specified transients induced lightning transients. 23 Lightning Direct Effects Not Required Product not certified to these requirements. 24 Icing Not Required Product not certified to these requirements. No retest needed. None of the changes are on 25 Electrostatic Discharge (ESD) Analysis interface circuitry or are needed to withstand ESD. 26 Fire, Flammability Not Required Product not certified to these requirements. END OF DOCUMENT ACSS Use or disclosure of the information on this sheet is subject to the Page 17 proprietary notice on the title page. Proprietary


Document Created: 2019-08-27 10:37:59
Document Modified: 2019-08-27 10:37:59
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