FCC ID: C8LT6-AV100 VHF Ground to Air 100W Amplifier

TITLE Park Air T6-AV100 VHF 100 W Power Amplifier User Documentation PRODUCT CODE T6-D-USER-AV100-EN Product Code:

Part Number:

Version Date of Issue:

Published By:

Telephone:

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T6-D-USER-AV100-EN 31-3T6AV1EN 1.0 May 2020 Northrop Grumman Park Air Systems Ltd Northfields Market Deeping Peterborough PE6 8UE UK From UK, 01778 345434 From outside UK, +44 1778 345434 sales@parkairsystems.com www.parkairsystems.com Park Air Systems Ltd 2020 All rights reserved. No part of this publication may be reproduced or transmitted in any form or by any means, electronic, mechanical, photocopying, recording or otherwise without the prior permission of the publisher. This information and intellectual property contained herein is confidential between Northrop Grumman and the client and remains the exclusive property of Northrop Grumman. Northrop Grumman does not warrant that this document is error free. Foreword This user documentation gives the necessary information for a user to install and understand the operation of the Park Air T6 VHF Power Amplifier used in series with either Park Air T6 VHF Transmitter or Park Air T6 VHF Transceiver supplied by Northrop Grumman. Copyright and trademarks This documentation could contain information provided by other equipment manufacturers. It is acknowledged that the copyright of any third party information is retained by the respective holder. Similarly, any trademarks and protected names or symbols contained in this documentation, or associated documentation, belong to their respective holder. Restrictions on use European States with restrictions on use EU / EFTA member states intended for use All countries Member states with restrictive use None T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page iii Health and safety Disposal This equipment is covered by the European Directive 2012/19/EU. Items must not be disposed of in domestic waste. Disposal must be made using designated collection facilities appointed by the government or the local authorities in your area. Directive 2011/65/EU including amendment 2015/863 (RoHS). Warnings A warning is used to show possible danger to personnel. In this documentation, warnings are shown by the following symbols:

Shows electrical danger to personnel Shows a specified danger to personnel Shows a non-ionizing radiation hazard Cautions A caution is used to show possible danger to the equipment. In this documentation, cautions are shown by the following symbols:

Shows the presence of electrostatic sensitive devices (ESDs) Shows a specified danger to the equipment T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page iv You must be suitably qualified to terminate a mains supply to the equipment. Dangerous voltage Dangerous voltage Antenna radiation You must be careful of high RF voltages on the ANTENNA connector on the rear of the amplifier. This is indicated by the RF voltage warning symbol ( ). The transmit antenna must be installed such that the resultant radiated field strength is below national limits, see Annex for limits and examples. The safe distance must be calculated for each installation. Fan replacement Fan replacement must be done by a skilled person. No user serviceable parts inside the amplifier There are no user serviceable parts inside the amplifier. Double pole/neutral fusing The amplifier uses a power supply which has both live and neutral fuses. The AC socket-outlet must be installed near the amplifier and must have easy access. AC socket-outlet Earth connection This equipment must be earthed. The earth terminal of the AC connector must be used as the safety earth. AC and/or DC supply The power cables are the amplifiers disconnect devices. AC supply fuse rating The amplifier AC supplies must have a 6.3 Amp time-delay fuse fitted. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page v Unauthorized modifications Changes or modifications made to equipment without the approval of Northrop Grumman, or parties authorized by Northrop Grumman, could invalidate the users authority to operate the equipment. ESDs Modern electronic equipment contains Electrostatic Sensitive Devices (ESDs). Use necessary precautions to prevent damage to such devices. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page vi CE type approval Declaration of conformity Company information Park Air Systems Limited (a wholly owned subsidiary of Northrop Grumman Corporation) Northfields, Market Deeping, Peterborough, PE6 8UE

+44 1778 345 434 Product, model (part number) and description PARK AIR T6 T6-AV100 (24-31631041/1) Amplifier for use with a ground to air T6 ransmitter or

ransceiver in the VHF aeronautical band Standards EN62368-1 (2014) EN301 489-1 (V2.2.2 2019-09) / EN301 489-22 (V1.3.1 2003-11) EN300 676-1 (V1.5.2 2011-03) / EN300 676-2 (V2.1.1 2015-12) EN50385 (2017) EN50581 (2012) Notified body TV SD DANMARK ApS Strandvejen 125, 2900 Hellerup, Denmark EU-type examination certificate DK-RED001656 i01 This declaration of conformity is issued under the sole responsibility of the manufacturer. The product has been tested to the listed standards and is confirmed as being in compliance with the essential requirements and provisions of Directive 2014/53/EU (RED), Directive 2012/19/EU (WEEE) and Directive 2015/863 (RoHS3). The technical documentation relevant to the product will be held at Park Air Systems Limited for not less than ten years after the last product has been manufactured. Neil Upton Technical Director, Park Air Systems Limited Documentation number: DOC-T6-014 Issue 1.0 Declaration of conformity 18 May 2020 T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page vii Park Air Sapphire The Sapphire concept builds on over 50 years of Park Air innovation, delivering a truly integrated approach to providing ground-to-air solutions. The aim of Sapphire is to optimise the customers experience. The result is a coherent and unified collection of system components, backed up by a tailored suite of support services. From radios, controllers and filters to headsets and antennas, the Sapphire portfolio includes everything required for ATC communication systems. Just as importantly, the Sapphire components are designed to integrate perfectly for stress-free implementation and operation. The name Park Air has been synonymous with ATC communications since 1966 and has always been a name you can trust. Now Sapphire represents the pinnacle of Park Air expertise, innovation and industry knowledge. At the heart of Sapphire is the latest evolution of the worlds leading ground-to-air radio platform, the Park Air T6. Packed with the latest technology, the T6 Radios offer outstanding performance for VHF and UHF coverage. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page viii Park Air V2 Services Use email or telephone to contact V2 Park Air Services. For help with configuration, installation or maintenance of equipment, use any of the contact methods listed below. Email:

support@uk.parkairsystems.com Telephone (24 hours): Within the UK, International, 01778 381557

+44 1778 381557 Mail:

Customer Services Department Northrop Grumman Park Air Systems Ltd Northfields Market Deeping Peterborough PE6 8UE UK Web Site:

www.parkairsystems.com/contact T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page ix About this user documentation This user documentation has nine sections:

Section 1. Overview Section 2. Description - the human machine interface and detailed connectivity Section 3. Installation - as standalone, in the Park Air C4 Cabinet and any 19 cabinet Section 4. Amplifier/radio interaction - how to use the Park Air T6-AV100 VHF 100 W Power Amplifier. Section 5. Maintenance - routine and interruptive tasks including part replacement Section 6. Connector information - interface types and specification Section 7. Specification Section 8. Associated equipment Section 9. Fault finding Annex - antenna radiation information. A cross-reference to a section is shown as the section or sub-section number and the title. An example is, 4.2.2 Settings for amplifier RF power output. A cross-reference to a page is shown as the page number. An example is, page 4-1. A glossary of terms can be found in Glossary of abbreviations, acronyms and technical terms on page xi. To help the reader, the first time a term is used in the book, it is italicised and emboldened. An example is, main/standby. A table of associated equipment from the Park Air Sapphire range can be found in Associated equipment. To help the reader, the first time any associated equipment is mentioned in the book, it is italicized. An example is Park Air C4 Cabinet. The electronic (PDF) version of this documentation has text-links to help the reader navigate topics as shown in the examples:

Example Text-link Example T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page x Glossary of abbreviations, acronyms and technical terms Ampere alternating current amplitude modulation air traffic control built-in-test American Wire Gauge (U.S. standard set of non-ferrous wire conductor sizes) Conformit Europenne (European health & safety product certification) Canadian Standards Association (provides product certification and product testing Federal Communication Commission (regulates radio communications within the United Main/standby The radio is operationally main or standby (analogue radio control terminology) MARC multi access remote control services for Canada) decibel dB relative to an isotropic antenna direct current Electromagnetic Compatibility Directive electrostatic sensitive device European Union States of America and its territories) International Electrotechnical Commission Hertz kilogram metre light emitting diode normally closed (contact terminal status) normally open (contact terminal status) unit of resistance organic light emitting diode press-to-transmit or push-to-talk radio frequency 8 position 8 contact (8P8C) connector Restriction of Hazardous Substances Directive Volt-Ampere (apparent power) very high frequency voltage standing wave ratio ultra high frequency Volt Watt Underwriters Laboratories (global safety certification) A AC AM ATC AWG BIT CE CSA dB dBi DC EMC ESD EU FCC Hz IEC kg LED m N/C N/O Ohm OLED PTT RF RJ45 RoHS V VA VHF VSWR UHF UL W 4-wire E & M Analogue transmit and receive audio with squelch and PTT signalling T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page xi Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page xii Foreword Copyright and trademarks Restrictions on use Health and safety Disposal Warnings Cautions CE type approval Park Air Sapphire Park Air V2 Services About this user documentation Glossary of abbreviations, acronyms and technical terms 1 Overview 1.1 Introduction 1.1.1 Standalone operation 1.1.2 Park Air C4 Cabinet installation 1.2 Park Air T6-AV100 VHF 100 W Power Amplifier 1.2.1 T6 VHF Amplifier product code 1.2.2 T6 VHF Amplifier accessories 1.2.3 T6 VHF Amplifier documentation 1.2.4 T6 VHF Amplifier spares 1.3 Features 1.3.1 Built-in-test 1.3.2 Internal RF bypass 2 Description 2.1 Front panel interfaces 2.1.1 On/off switch 2.1.2 Power supply indicator 2.1.3 Fault indicator display 2.1.4 Busy indicator 2.1.5 Status indicator 2.2 Rear panel connectors and symbols 2.2.1 Radio connectivity 2.2.2 AC and DC connectivity 2.2.3 Antenna connectivity 2.3 Antenna configurations 2.3.1 Standalone radio configuration 2.3.2 Main/standby configurations 2.4 Labels 2.4.1 Product label 2.4.2 Serial number label 3 Installation 3.1 Standalone installation 3.1.1 Connect the cables 3.1.2 Switch on the amplifier 3.2 Park Air C4 Cabinet installation 3.2.1 Tool-free installation 3.2.2 Connect the cables 3.2.3 Amplifier removal 3.3 Installation in 19 cabinet 3.3.1 19 cabinet accessories 3.3.2 Mounting adaptor installation 4 Amplifier/radio interaction 4.1 Turn the amplifier on 4.2 Turn the radio on T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 1 iii iii iii iv iv iv iv vii viii ix x xi 1-1 1-1 1-1 1-2 1-3 1-3 1-3 1-3 1-3 1-3 1-3 1-3 2-1 2-1 2-1 2-1 2-2 2-2 2-2 2-3 2-4 2-4 2-4 2-5 2-5 2-6 2-9 2-9 2-9 3-1 3-2 3-2 3-2 3-3 3-3 3-4 3-4 3-5 3-5 3-5 4-1 4-1 4-1 4.2.1 Home screen 4.2.2 Settings for amplifier RF power output 4.2.3 Status 5 Maintenance 5.1 Fan replacement 6 Connector information 6.1 Rear panel connectors 7 Specification 8 Associated equipment 8.1 Table of associated equipment 9 Fault finding Annex Antenna radiation limits - health and safety Countries within the European Union Canada United States of America 7.1 Park Air T6 VHF 100 W Power Amplifier specifications 7.2 Park Air T6 VHF 100 W Power Amplifier features and benefits 4-1 4-2 4-4 5-1 5-1 6-1 6-1 7-1 7-1 7-1 8-1 8-1 9-1 Annex-1 Annex-1 Annex-1 Annex-3 Annex-4 T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2 1 Overview 1.1 Introduction The Park Air T6-AV100 VHF 100 W Power Amplifier enhances the capabilities of Park Air T6-TV VHF 50 W Transmitters and Park Air T6-TRV V H F 50 W Transceivers1 for the most challenging of RF environments. The T 6 Amplifier is placed in series with a standard T6 Transmitter or Transceiver and provides amplification of the R F output up to 100 W. The amplifier provides class-leading RF performance whilst integrated into a small ligh t package. Intelligent built-in-test to monitor its own performance and allow RF pass through to safeguard The T6 VHF 100 W Power Amplifier features:

Class-leading RF co-location performance communications Extended service interval and service lifetime Tool-free installation into the Park Air C4 Cabinet No materials specified in the Restriction of Hazardous Substances Directive The T6 VHF 100 W Power Amplifier accessories:

Mounting adaptor for 19 cabinets. Associated accessories are shown in 8.1 Table of associated equipment 1.1.1 Standalone operation The T6 VHF Amplifier can compliment standalone T6 Transmitters or Transceivers with the addition of a suitable AC and/or DC supply, an antenna and a Park Air S2 Hand Microphone or Park Air S2 Headset. Installation details are shown in 3.1 Standalone installation. 1. The T6 50 W Transmitters/Transceivers must be operating a firmware version of 65-00000841/10.8.0 or later. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 1-1 Overview 1.1.2 Park Air C4 Cabinet installation The T6 Radios, T6 Amplifiers and Park Air Z4 Filters are specifically designed to fit the C4 Cabinet. The T6 Amplifier requires a 2U 19 partition. The C4 Cabinet can accommodate various combinations of T6 Radios, T6 Amplifiers and Z4 Filters. The C4 family of cabinets has the following capacity options:

22U, 32U or 42U capacity. Typical T6 Radio and T6 Amplifier installation (rear):

Installation details are shown in 3.2 Park Air C4 Cabinet installation. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 1-2 Overview 1.2 Park Air T6-AV100 VHF 100 W Power Amplifier The product codes and product names of the amplifier, accessories and documentation for the T6 VHF Amplifier. T6-A-CMA2 19 cabinet mounting adaptor for one amplifier See 3.3 Installation in 19 cabinet 1.2.1 T6 VHF Amplifier product code Product code Product name T6-AV100 T6 VHF 100 W Power Amplifier 1.2.2 T6 VHF Amplifier accessories Product code Product name 1.2.3 T6 VHF Amplifier documentation Product code Product name T6-D-USER-AV100-EN User documentation for T6-AV100 in English T6-D-USER-AV100-FR User documentation for T6-AV100 in French T6-D-USER-AV100-ES User documentation for T6-AV100 in Spanish 1.2.4 T6 VHF Amplifier spares Product code Product name 69A12006025 Cooling fan Notes Notes Notes Notes See 5.1 Fan replacement 1.3 Features 1.3.1 Built-in-test The T6 Amplifier continually monitors its own environment and performance. Fault detection alerts the radio to enter a Reduced Service state, decreasing the power output and alerting the operator with diagnostic information before loss of service occurs. See 7.2 Park Air T6 VHF 100 W Power Amplifier features and benefits. 1.3.2 Internal RF bypass On failure the T6 Amplifier automatically switches into bypass mode. This allows transmission to continue at a reduced power, see 7.2 Park Air T6 VHF 100 W Power Amplifier features and benefits. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 1-3 Overview Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 1-4 Overview 2 Description The T6 VHF Amplifier interfaces are shown in this section. 2.1 Front panel interfaces Power supply indicators Fault indicator display Busy indicator On/off switch Status indicator Control Notes On/off switch Front panel on/off of the amplifier See 2.1.1 On/off switch Power supply indicator Connected power source types See 2.1.2 Power supply indicator Fault indicator display Fault code icons See 2.1.3 Fault indicator display Busy indicator Transmitting when illuminated See 2.1.4 Busy indicator Status indicator Ready or reduced service status See 2.1.5 Status indicator 2.1.1 On/off switch Control Notes On/off switch The power cables are the power disconnect devices. Note:

This action symbol is used in the document. 2.1.2 Power supply indicator Power supply indicator Function Notes AC power supply connected DC power supply connected The AC indicator illuminates amber The amplifier requires two separate AC power supplies The DC indicator illuminates amber The amplifier requires two separate DC power supplies Note:

These action symbols are used in the document. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-1 Description 2.1.3 Fault indicator display Fault code indicator Fault Notes Internal fault detected The spanner indicator illuminates amber High VSWR detected The antenna indicator illuminates amber Over-temperature detected The temperature indicator illuminates amber Fan failure detected The fan indicator illuminates amber Note:

2.1.4 Busy indicator These action symbols are used in the document. Busy indicator Function Notes The amplifier transmits The busy indicator illuminates amber 2.1.5 Status indicator The status indicator illuminates blue or red. Status indicator Action Notes Illuminates blue BIT status is Full Service Illuminates red BIT status is bypass mode or Reduced Service Note:

These action symbols are used in the document. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-2 Description 2.2 Rear panel connectors and symbols ANTENNA connector RF voltage warning symbol DC input 1 DC input 2 AC input 1 AC input 2 RADIO RF connector RADIO A connector RADIO B connector Earth stud connector User Documentation symbol Caution symbol Serial number label The symbols on the rear of the amplifier are described in the table below. Symbol Symbol name Notes RF voltage warning symbol You must be careful of high RF voltages on the ANTENNA connector on the rear of the amplifier. See 2.3 Antenna configurations. User Documentation symbol See this User Documentation before use of the amplifier. Caution symbol Caution is required when operating the amplifier. Each connector type is shown in the table below and associated connection cable colour codes. Connector Connector type Cable Notes DC input 1 & 2 Saf-D-Grid chassis plug See DC input connector on page 6-2 AC input 1 & 2 IEC-C16 chassis plug See AC input connector on page 6-2 ANTENNA N-type socket See ANTENNA connector on page 6-3 RADIO N-type socket See Radio connector on page 6-3 Earth stud connector M5 thread See Earth stud connector on page 6-2 RADIO A RJ45 socket Green See AMP (amplifier) connector on page 6-1 RADIO B RJ45 socket Green See AMP (amplifier) connector on page 6-1 FAC RJ45 socket Yellow T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-3 Description 2.2.1 Radio connectivity Connectivity from the radio to the amplifier is made using a RJ45 connection from the radios AMP connector to the amplifier RADIO A or RADIO B connector. T6 Radio T6 100 W Amplifier 2.2.2 AC and DC connectivity There are both AC and DC inputs that each require two power supplies. AC input and/or DC input 2.2.3 Antenna connectivity There are a number of standalone radio and main/standby antenna configurations that may include the T6 Amplifier. More information on antenna configurations can be found in 2.3 Antenna configurations. From radio Standalone radio operation Main/standby operation Transmit and/or receive Transmit and/or receive More information on all the connectors is shown in 6 Connector information. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-4 Description 2.3 Antenna configurations Dangerous voltage You must be careful of high RF voltages on the ANTENNA connector on the rear of the radio and amplifier. This is indicated by the RF voltage warning symbol ( ). RF switch control signal Only enable the RF switch control setting on a radio that is connected directly to either another Park Air T6 Radios internal relay or a Park Air Z4 Solid State Changeover Relay when DC control is required. The DC signal used for switching these relays can cause other equipment to not function correctly and reduce system performance. 2.3.1 Standalone radio configuration Single transmit or transmit/receive antenna:

Transmit antenna Transmit/receive antenna or Transmit and receive antennas:

Connect to RADIO A or RADIO B Transmit antenna Connect to RADIO A or RADIO B Receive antenna T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-5 Description 2.3.2 Main/standby configurations Transmit or transmit/receive antenna with RF link:

Main radio RF LINK Standby radio Transmit antenna Transmit/receive antenna or Notes:

standby radio.

(1) The RF switch control setting must be enabled on the

(2) When the RF switch control setting is enabled, the radio enforces a minimum 10 ms RF power delay. If a longer delay is needed, change the RF power delay setting. Transmit or transmit/receive antenna with a Park Air Z4 Solid State Changeover Relay (which is referred to in this section as a solid state relay):

Main radio DC switching option FAC cable option Common N/C N/O Standby radio Solid state relay Transmit antenna Transmit/receive antenna or DC switching option Notes:

(1) The solid state relay can be controlled by DC switching or a Facilities (FAC) cable.

(2) The main radio FAC cable supplies power to the RF relay. The standby radio FAC cable supplies power and the control signal. If the FAC cable option is required, both cables must be used.

(3) If the DC switching option is required, the RF switch control setting must be enabled on both radios.

(4) When the RF switch control setting is enabled, the radio enforces a minimum 10 ms RF power delay. If a longer delay is needed, change the RF power delay setting. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-6 Description Transmit and receive antennas with a solid state relay and a Park Air Z4 3dB Receiver Splitter (which is referred to in this section as a receiver splitter):

DC switching option FAC cable option N/C Common N/O Solid state relay Main radio DC switching option Transmit antenna Receive antenna Standby radio Notes:

Receiver splitter

(1) The solid state relay can be controlled by DC switching or a Facilities (FAC) cable.

(2) The main radio FAC cable supplies power to the RF relay. The standby radio FAC cable supplies power and the control signal. If the FAC cable option is required, both cables must be used.

(3) If the DC switching option is required, the RF switch control setting must be enabled on both radios.

(4) When the RF switch control setting is enabled, the radio enforces a minimum 10 ms RF power delay. If a longer delay is needed, change the RF power delay setting.

(5) Where a radio uses its RF LINK connector as a separate receive input, the separate antenna option must be enabled. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-7 Description Transmit and receive antennas with solid state relays:

FAC cable option DC switching option Main radio Standby radio Common N/C N/O Solid state relay Common N/C N/O Solid state relay DC switching option Transmit antenna Receive antenna Notes:

(1) The solid state relay can be controlled by DC switching or a Facilities (FAC) cable.

(2) The receive solid state relay must be controlled by a Facilities (FAC) cable.

(3) The main radio FAC cable supplies power to the RF relay. The standby radio FAC cable supplies power and the control signal. If the FAC cable option is required, both cables must be used.

(4) If the DC switching option is required for the transmit solid state relay, the RF switch control setting must be enabled on both radios.

(5) When the RF switch control setting is enabled, the radio enforces a minimum 10 ms RF power delay. If a longer delay is needed, change the RF power delay setting. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-8 Description 2.4 Labels 2.4.1 Product label The product label is on the bottom of the amplifier. 2.4.2 Serial number label A serial number label is on the rear of the amplifier. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-9 Description Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 2-10 Description 3 Installation Dangerous voltage Dangerous voltage Antenna radiation Earth connection You must be suitably qualified to terminate a mains supply to the equipment. You must be careful of high RF voltages on the ANTENNA connector on the rear of the amplifier. This is indicated by the RF voltage warning symbol ( ). The transmit antenna must be installed such that the resultant radiated field strength is below national limits, see Annex for limits and examples. The safe distance must be calculated for each installation. This equipment must be earthed. The earth terminal of the AC connector must be used as the safety earth. AC and/or DC supply The power cables are the amplifiers disconnect devices. AC supply fuse rating The amplifier AC supplies must have a 6.3 Amp time-delay fuse fitted. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-1 Installation 3.1 Standalone installation AC socket-outlet The AC socket-outlet must be installed near the amplifier and must have easy access. For T6 VHF Transmitter and Transceiver installation instructions, see the relevant product user guide. The T6 VHF Amplifier must have two suitable AC and/or DC supplies and a suitable antenna. The AC supply cable specification is shown with AC input connector on page 6-2 and the DC supply cable specification is shown with DC input connector on page 6-2. 3.1.1 Connect the cables

(1) Make sure the RF cable from the radio to the amplifier is correctly connected.

(2) Make sure the antenna cable is correctly connected.

(3) Make sure the cables from the radios AMP connector(s) are correctly connected.

(4) Make sure the AC and/or DC supply cables are correctly connected. 3.1.2 Switch on the amplifier Refer to 4 Amplifier/radio interaction for further details. To make sure the amplifier is operational:

(1) Make sure the status Indicator is blue

(2) Make sure the correct power supply indicators are illuminated AC and/or DC

(3) Do an operational test in accordance with local regulations or when required by the user. An accessory microphone or handset may be required. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-2 Installation 3.2 Park Air C4 Cabinet installation 3.2.1 Tool-free installation Identify the amplifier position Hold the amplifier with both hands Rear of amplifier Park Air C4 Cabinet (front) Cabinet shelf Cabinet shelf Place the rear feet of the amplifier on the cabinet shelf Slide the amplifier on the rear feet to the rear of the shelf Slide Rear of amplifier Rear feet Cabinet shelf Earth stud Earth stud Plain holes Cabinet shelf Slide the amplifier until the front feet locate into the keyed holes. Push the amplifier back until the rear feet locate into the rear holes and the front feet lock into the keyed holes.

(The front feet are profiled to lock in) Keyed holes Slide Push Front feet Cabinet shelf Front feet Cabinet shelf Tighten the earth stud . It must be tight.*

*Failure to comply with this instruction will result in non-compliance with the EMC Directive 2014/30/EU. The unit is correctly installed in the cabinet. Rear of amplifier Rear of amplifier Rear feet Rear of amplifier Cabinet shelf Tighten earth stud T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-3 Installation 3.2.2 Connect the cables If the amplifier is fitted to a wired position in the cabinet, the amplifier control cables are wrapped together.

(1) Connect the RJ45 cables as applicable, see 2.3 Antenna configurations. The cables are colour-coded. RJ45 cable colour RJ45 connection Yellow FAC Green AMP (Radio A) Green AMP (Radio B) The amplifier can be powered when the cabinet installation is complete or when decided by a suitably qualified person. Connect the RF cable/s. Connect the AC and /or DC supply cables. 3.2.3 Amplifier removal To remove an amplifier from a C4 Cabinet:

(2)

(3)

(1)

(2) Remove the cables in the opposite order to 3.2.2 Connect the cables. Remove the amplifier from the cabinet in the opposite order to 3.2.1 Tool-free installation. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-4 Installation 3.3 Installation in 19 cabinet To fit a T6 VHF Amplifier to a 19 cabinet, a mounting adaptor is to be used. 3.3.1 19 cabinet accessories Product code Product name T6-A-CMA2 19 cabinet mounting adaptor 3.3.2 Mounting adaptor installation To fit the mounting adaptor to a 19 cabinet:

(1)

(2) Identify the cabinet position where the amplifier is to be fitted. Use the four (4) cabinet fixing bolts provided to fit the mounting adaptor. To fit a T6 amplifier to the mounting adaptor, see 3.2.1 Tool-free installation. To complete the installation of the amplifier, see 3.2.2 Connect the cables. To remove the amplifier, see 3.2.3 Amplifier removal. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-5 Installation Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 3-6 Installation 4 Amplifier/radio interaction The T6 VHF Amplifier has easy to use functionality. Details of displays and indicators are shown in 2 Description. 4.1 Turn the amplifier on

(1) Make sure the radio is connected to two AC and/or DC supplies.

(2) Push

. (All indicators illuminate for approximately one second).

(3) The power indicators illuminate and/or

(4) The status indicator illuminates blue 4.2 Turn the radio on

(1) Make sure the radio is connected to an AC and/or DC supply.

(2) Push The radio then initialises.

(3)

(4) The icons illuminate The display shows:

The radio then shows the home screen. 4.2.1 Home screen An example of the home screen:

T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 4-1 Amplifier/radio interaction 4.2.2 Settings for amplifier RF power output RF power output of the amplifier can be adjusted through Park Air R4 MARC Server or the radios front panel. To change the amplifier power settings through the radio:

(1) Select

(2) Scroll so that Settings is shown in the middle parameter field. To enter the settings list:

(1) Push The settings list screen is shown. To change the RF power setting:

(1) Scroll so that the RF power setting is shown.

(2) Select or push

(3) Adjust the power Note:

To save the new setting:

(1) Select or push

(1) Select Power is adjusted in 2 W increments when radio and amplifier are connected. There is a 5 second delay between a setting being saved and it being stored in the radios memory. To go back to the menu screen:

T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 4-2 Amplifier/radio interaction To go back to the home screen:

(1) Select T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 4-3 Amplifier/radio interaction 4.2.3 Status This is the operational status of the radio. To find Status:

(1) Select

(2) Scroll so that Status is shown in the middle parameter field. To enter the status list:

(1) Push The status list screen is shown:

To select Status Messages, Monitoring or Status Reset:

(1) Scroll as necessary. Note:

(2) Push

(1) Select

(1) Select To go back to the menu screen:

To go back to the home screen:

Status list screen will display REDUCED SERVICE if a fault is detected. See 9 Fault finding. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 4-4 Amplifier/radio interaction Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 4-5 Amplifier/radio interaction 5 Maintenance No user serviceable parts inside the amplifier There are no user serviceable parts inside the amplifier. Double pole/neutral fusing The amplifier uses a power supply which has both live and neutral fuses. 5.1 Fan replacement Fan replacement Note:

To replace the fans:

Fan replacement must be done by a skilled person. Individual fan replacement is not recommended. In the event of a fan failure the fan/screen assembly must be replaced with genuine Park Air parts.

(1)

(2) Switch off the amplifier. Disconnect all cables from the amplifier. AC and/or DC supply The power cables are the amplifiers disconnect devices.

(3) Remove from the equipment cabinet (if applicable). On the rear of the amplifier:

Screws Screws

(4) With a T10 Torx screwdriver remove the eight (8) fixing screws. Remove the fan/screen assembly from the rear of the amplifier.

(5)

(6) Disconnect the fan connectors. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 5-1 Maintenance Clip-on connectors Check the heatsink cooling fins for blockages. Connect the new fan/screen assembly.

(7)

(8) Note:

The fan/screen assembly must be replaced with the same type. Note the cable and fan position:

Fan markings Cable position

(9) Insert the new fan/screen assembly into the rear of the amplifier.

(10) Fasten the fan/screen assembly with the eight (8) fixing screws.

(11) Install the amplifier to the cabinet (if applicable).

(12) Connect all the cables.

(13) Switch on the amplifier. The amplifier continually checks the correct function of the fan. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 5-2 Maintenance 6 Connector information 6.1 Rear panel connectors The rear panel connector pin-outs:

Connector Pin Signal Configuration Characteristics AMP (amplifier) connector PTT input Pull to ground to key T6 amplifier. Amplifier status (AS1) output See table below. Grounding contact input, pulled up to 5 V. Amber LED illuminates indicate PTT input is active. to Grounding contact output. Pulled to ground when the T6 amplifier is defective or switched off. AMP RJ45 Amplifier status (AS0) output See table below. Grounding contact output. 100 W output Floating to indicate T6 amplifier is 100 W. Grounding contact output. Reset bypass input Pull to ground to assert reset bypass. Grounding contact input, pulled up to 5 V. Green LED illuminates indicate reset bypass is asserted. to Inhibit output Pull to ground to indicate internal RF relays are switching. Grounding contact output. Green cable Ground (0 V) Connected to chassis earth. Supply input High impedance input. 27-29 V indicates to the amplifier that the radio is connected and switched on. 1 2 3 4 5 6 7 8 Amplifier status bits

(Low = pulled to ground) AS1 Low Low High High AS0 Low High Low High Amplifier status output signals Amplifier status Amplifier is connected and operating correctly. Amplifier is defective and switched to bypass mode. Amplifier is connected but operating with one power source type (AC or DC). Activated when one power source type is lost. Not used. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 6-1 Connector information Connector Connection Characteristics AC input connector 2 input supplies: 110 to 240 V AC. Frequency: 47 to 63 Hz. No more than 450 VA while the radio transmits under any condition. Neutral Earth Live Note:

AC inputs IEC-C16 chassis plug The connections are shown as viewed on the rear panel of the amplifier. The protective earthing connector (earth) must be connected. The cable used to connect between the equipment and the users AC power source must be 3-core (to IEC 227) rated 250 V AC at 8 A, and have a minimum cross-sectional area of 1.0 mm2 per core. Northrop Grumman recommends the use of polyvinyl chloride

(PVC) insulated cable. The cable must be fitted with the IEC approved equipment connector and conform to this specification:

If PVC insulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cable according to IEC publication 227

(designation H05 VV-F, H05 VVH2-F). For North America the cable must be UL listed/CSA recognised If rubber insulated, be of synthetic rubber and not lighter than ordinary tough rubber-sheathed flexible cable according to IEC publication 245 titled Rubber Insulated Cables of Rated Voltage up to and including 450/750 V (designation H05 RR-F). Connector Connection Characteristics DC input connector Negative -ve Not connected Positive +ve Note:

2 input supplies: 21 to 32 V DC. 20 A maximum. DC inputs Saf-D-Grid chassis plug Connector Earth stud M5 thread The connections are shown as viewed on the rear panel of the amplifier. The DC supply input protects against reverse polarity connection. The DC supply cable must have a minimum cross-sectional area of 2.5 mm2 or 12 AWG per core. If PVC insulated, be not lighter than ordinary polyvinyl chloride sheathed flexible cable according to IEC publication 227 (designation H05 VV-F, H05 VVH2-F). For North America the cable must be UL listed/CSA recognised. Earth stud connector Connection Note:

The amplifier is attached by the earth connection to the fixing-lug in the Park Air C4 cabinet. This must be attached. Failure to comply with this instruction may result in non-compliance with the EMC Directive 2014/30/EU. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 6-2 Connector information Connector Connection ANTENNA connector This connects the amplifier to the antenna RF path. Connector Connection Radio connector This connects the amplifier to the radio(s). ANTENNA N-type socket RADIO N-type socket T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 6-3 Connector information Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 6-4 Connector information 7 Specification 7.1 Park Air T6 VHF 100 W Power Amplifier specifications Parameter Value Operating frequencies 112 MHz to 156 MHz Output Power Dimensions Weight Waveform Interfaces 10 to 100 W maximum in 2 W steps 79 mm (2U) high 430mm (full-rack) wide 440 mm deep (including connectors)

<15 kg AM Voice with 25 kHz and 8.3 kHz channel spacings 2 x RJ45 connectors 2 x N-Type connectors Operating Temperature Range

-20 to +55C Standards See CE type approval on page vii. 7.2 Park Air T6 VHF 100 W Power Amplifier features and benefits Feature Benefit Environmental Impact and Efficiency Reduced whole life costs Radio Pair Operation An amplifier can be used with a pair of main/standby radios without any additional configuration Quality of Communications Class-leading RF performance Reduced environmental impact Safety RF bypass Flexible features Intelligent built-in-test Efficiency increased and power consumption decreased Ten-year service interval and fifteen-year service lifetime Reduced initial and ongoing costs No RoHS specified materials used Better environmental performance Excellent reverse intermodulation performance provides a reduction in the requirement for filtering and isolation in the radio system Automatic switchover to bypass mode if amplifier fails, ensuring transmission capability (reduced power) Independent AC and DC power options Continually monitors own environment and performance Enters a reduced service state when issues are detected Decreases power output Alerts operator with diagnostic information See 9 Fault finding Connect to the amplifier through the radios high resolution OLED graphical display Visual indications of amplifier activity Context-specific soft buttons Indicator icons Simplified installation, set-up and usability Tool free installation No tools required for cabinet installation Intuitive user interface T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 7-1 Specification Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 7-2 Specification 8 Associated equipment 8.1 Table of associated equipment Product code Product name Notes Park Air T6 VHF Transmitter A versatile multimode digital 50 W transmitter. Park Air T6 VHF Transceiver A versatile multimode digital 50 W transceiver. T6-TV T6-TRV C4-22U Park Air C4 22U Cabinet C4-32U Park Air C4 32U Cabinet C4-42U Park Air C4 42U Cabinet J4-4WEMSWITCH Park Air J4 2 Way Audio 4 Wire E&M Line Switch R4-MARCS MARC Server RCMS Application R4-O-MST6S3 Park Air T6 Radio Module for MARC Server S2-HST6 Park Air S2 Headset for use with T6 radios S2-MICT6 Park Air S2 Hand Microphone for use with T6 radios S4-IP Park Air S4 IP Controller For integration of Park Air T6 Radios, Z4 Filters and their accessories. Compatible with standard 19 inch rack-mount equipment. Includes cable management system and DIN-rails for rear-mounted components. Switches a single audio 4 Wire E&M line two ways under radio control for interfacing to main/standby T6 Radio pairs. DIN-rail mounted. Comprehensive role-based remote control and monitoring software, accessed via desktop or portable web browser devices, for use with radios and associated radio site equipment. Supplied with dongle licence key. Allows monitoring and control of Park Air T6 radios from MARC Server. Robust dual earpiece lightweight headset with PTT switch and noise cancelling flexible boom microphone. Includes integral coiled cable of length 3m (when fully extended) terminated in self-locking plug. For maintenance and general purpose use. Includes integral PTT switch and coiled cable of length 2m (when fully extended) terminated in self-locking plug. Remote Control Unit (RCU) hardware with colour LCD touch screen. Operates from AC supply or 12V nominal DC supply. Supplied with universal AC adaptor and lead, DC supply connector and 2m CAT 5 cable. Z4-FILTSV170 Park Air Z4 VHF 170mm Single Fixed Cavity Filter A high performance filter. 100 Watts power handling. Z4-SSRELAY Park Air Z4 Solid State Changeover Relay Z4-SPLIT3DB Park Air Z4 3dB Receiver Splitter Switches a single RF feed two ways under radio control for interfacing to main/standby radio pairs. DIN-rail mounted. Splits a single RF feed two ways under radio control for interfacing to main/standby radio pairs. DIN-rail mounted. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 8-1 Associated equipment Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 8-2 Associated equipment 9 Fault finding Use the fault finding guidelines below to resolve problems that may arise when operating the amplifier. If the problem remains contact the Park Air Customer Service department, see Park Air V2 Services. Symptom Displayed icons and message alerts Probable cause Remedy Amplifier will not power on No status indicator illuminated. No available power supply

(outage) Check power supply available. No power supply indicator illuminated. Power supply cables not connected correctly. Check both AC/AC and DC/DC power supply connectors. Radio home screen displays Reduced Service message. Status indicator illuminates red. Internal fault. Contact Park Air Customer Services. Spanner fault code indicator illuminated. Radio home screen displays Reduced Service message. Status indicator illuminates red. High VSWR. Reduction in power output Radio home screen displays Reduced Service message. Antenna fault code indicator illuminated. Status indicator illuminates red. Amplifier over-temperature. Temperature fault code indicator illuminated. Radio home screen displays Reduced Service message. Status indicator illuminates red. Fan failure. Fanfault code indicator illuminated. Check connections. Check RF feeder Check antenna Check surge arrestor devices. Check fans, if defective see fan failure remedy steps. Check cabinet fans (if fitted). Check ambient temperature. Check all ventilation for blockages/restrictions. 1. Turn off amplifier. 2. Disconnect power supply. 3. Connect radio directly to antenna. 4. Link radios (if required) 5. Replace fans. 6. Reconnect amplifier. 7. Complete a function test. Amplifier will not transmit Radio home screen displays VSWR message. No RF connection Check and secure all connections. Amplifier displays a single power source type Radio home screen displays Reduced Status -

Amplifier Absent power source type indicator is extinguished on amplifier. No available power supply

(outage) Check power supply available. Power supply cables not connected correctly. Check affected power supply connectors. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 9-1 Fault finding Intentionally blank T6-D-USER-AV100-EN Park Air Systems Limited 2020 Page 9-2 Fault finding Annex Antenna radiation limits - health and safety Antenna radiation The transmit antenna must be installed such that the resultant radiated field strength is below national limits. The safe distance must be calculated for each installation. Countries within the European Union The compliance boundaries can be calculated using method in EN 62232:2017, Determination of field strength, power density and flux density in the vicinity of radio communication base stations for the purpose of evaluating human exposure. The limits are shown in the table below:

Level Frequency

(MHz) Power density

(W/m2) Electric field strength

(V/m) Magnetic field strength

(A/m) Magnetic flux density

(T)

*Occupational level 100 - 400 100 - 400 2 0.073 61 28 0.2 0.092

*General population level Notes:

Example

*Occupation level limits in adherence to EU occupational limits directive 2013/35/EU.

*General population level limits in adherence to EU general public limits directive 1999/519/EC. The safe distance from the antenna can be predicted using the equations:

R =

PG

4S S

H2 S

E2 S

B 0 2 where, R = distance to centre of radiation in metres (m) P = average power input to antenna in Watts (example, 100 W carrier with 95% modulation = 145 W) G = antenna gain as a ratio (example, 2 dB = 10 2/10 = 1.585) S = power density in W/m2H H = magnetic field strength (A/m) T6-D-USER-AV100-EN Park Air Systems Limited 2020 Annex Page 1 E = electric field strength (V/m) B = magnetic flux density (T)

= impedance of free space (377 in far field) 0 = permeability of free space (4x10-7 ) (H/m). Based on this formula and using a 2 dBi antenna, For occupational workers (RF and microwave):

The predicted safe distance from the centre of the radiation would be approximately 1.4 m for values as shown in the table. For persons not classed as occupational workers, and including the general public:

The minimum safe distance would be 3.1 m for values as shown in the table. Note:

Safe distances are rounded up to the nearest 0.1 m. Correct at 27th February 2020. For Canada, please see overleaf. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Annex Page 2 Canada The RF power density limits according to Health Canada Safety Code 6, are shown in the table below:

Frequency MHz Occupational level W/m2 General population level W/m2 112.000 118.000 127.500 136.975 155.975 225.000 300.000 399.975 6.83 7.01 7.28 7.55 8.06 9.68 11.18 12.90 1.29 1.29 1.29 1.29 1.29 1.29 1.29 1.57 The general equation for Occupational level:

RF power density = 0.6455 f 0.5 W/m2 where, f = frequency in MHz. The general equations for General population level:

For 100 to 300 MHz, RF power density = 1.291 W/m2 and, for 300 to 400 MHz, RF power density = 0.02619 f 0.6834 W/m2 where, f = frequency in MHz. Example where, The safe distance from the antenna can be predicted using the equation:

R =

PG

4S R = distance to centre of radiation in metres (m) P = average power input to antenna in Watts (example, 100 W carrier with 95% modulation = 145 W) G = antenna gain as a ratio (example, 2 dB = 10 2/10 = 1.585) S = power density in W/m2. Based on this formula and using a 2 dBi antenna, frequency of 118.000 MHz and a measured carrier power of 100 W, for occupational workers:

The predicted safe distance from the centre of the radiation would be approximately 1.7 m. For persons not classed as occupational workers, and including the general public:

The minimum safe distance would be 3.8 m. Note:

Safe distances are rounded up to the nearest 0.1 m. Correct at 27th February 2020. For United States of America, please see overleaf. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Annex Page 3 United States of America The RF power density limits according to FCC directive CFR 47 Part 2.109, are shown in the table below:

Frequency MHz 112.000 - 300.000 399.975 Occupational level W/m2 General population level W/m2 10.0 13.34 2.00 1.57 The general equations for Occupational level:

For 100 to 300 MHz, RF power density = 10 W/m2, and For 300 to 400 MHz, RF power density = f /30 W/m2 where, f = frequency in MHz. The general equations for General population level:

For 100 to 300 MHz, RF power density = 2.0 W/m2 and, for 300 to 400 MHz, RFR power density = f /150 W/m2 where, f = frequency in MHz. Example The safe distance from the antenna can be predicted using the equation:

R =

PG

4S where, R = distance to centre of radiation in metres (m) P = average power input to antenna in Watts (example, 100 W carrier with 95% modulation = 145 W) G = antenna gain as a ratio (example, 2 dB = 10 2/10 = 1.585) S = power density in W/m2. Based on this formula and using a 2 dBi antenna, frequency of 118.000 MHz and a measured carrier power of 100 W, for occupational workers:

The predicted safe distance from the centre of the radiation would be approximately 1.4 m. For persons not classed as occupational workers, and including the general public:

The minimum safe distance would be 3.1 m. Note:

Safe distances are rounded up to the nearest 0.1 m. T6-D-USER-AV100-EN Park Air Systems Limited 2020 Annex Page 4

Model: T6-AV100 PCIN:

S/N:

24-31631041/1 289694 MOD:

1 2 3 4 5 6 7 8 PARK AIR AC SUPPLY DC SUPPLY 110-240V ~ 2 x 4.5A 47-63Hz 21-32V 2 x 20A POWER 2 x 450VA max 2137A-T6AV100 IC:

FCC ID:

C8LT6-AV100 This device complies with part 15 of the FCC Rules. Operaon is subject to the condion that this device does not cause harmful interference. ETL LISTED CONFORMS TO UL STD 62368-1 CERTIFIED TO CSA C22.2 STD NO. 62368-1 3052630 RoHS compliant WARNING To prevent electric shock do not remove covers. No user serviceable parts inside. This unit must be earthed. Read installaon instrucons before connecng supplies. Cauon: Double pole/Neutral fusing. Servicing must be carried out by suitably qualied personnel. AVERTISSEMENT Pour viter tout risque dlectrocuon, ne pas rerer les capots. Pas de pares rparables par lulisateur lintrieur. Lquipment doit tre mis la terre. Lire les instrucons dinstallaon avant de raccorder les alimentaons lectriques. Cauon: Double ple/Fusibles Neutres. Lentreen ne doit tre eectu que par du personnel dment quali. S/N:

289694 Model:

T6-AV100 S/N:

289694 Model:

T6-AV100

Park Air Systems Ltd Northfields Market Deeping Peterborough PE6 8UE, UK Tel Fax www.parkairsystems.com

+44 17 78 34 54 34

+44 17 78 34 28 77 11th March 2021 TUV SUD BABT TCB Octagon House, Segensworth Road, Fareham, Hampshire, PO15 5RL Confidentiality Request FCC ID: C8LT6-AV100 Pursuant to Sections 0.457(d)(1)(ii) and 0.459 of the Commissions Rules, Park Air Systems Ltd hereby requests permanent confidential treatment of information accompanying this application as outlined below:

Block diagrams Schematics PCB layouts Parts lists Technical description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these matters might be harmful to the Applicant and provide unjustified benefits to its competitors. The Applicant understands that pursuant to Rule 0.457(d)(1)(ii), disclosure of this Application and all accompanying materials will not be made before the date of the Grant for this Application. Yours sincerely, P. Ackerman Principal Test and Acceptance Engineer Tel: +44 (0)1778 381575 Email: p.ackerman@uk.parkairsystems.com Park Air Systems Ltd Registered in England 1951792 Registered Office: Northfields, Market Deeping, Peterborough, PE6 8UE, UK. A subsidiary of Northrop Grumman Corporation.