NORTHROP GRUMMAN Park Air T6-RV Operator's manual

PRODUCT CODE
TITLE
Park Air T6-RV VHF Receiver
User Documentation
T6-D-USER-RV-EN

Product Code: T6-D-USER-RV-EN
Part Number: 31-30T6RVEN
Version 1.3
Date of Issue: February 2017
Published By: Northrop Grumman
Park Air Systems Ltd
Northfields
Market Deeping
Peterborough PE6 8UE
UK
Telephone: From UK, 01778 345434
From outside UK, [phone]
Email [email protected]
Web site: www.northropgrummaninternational.com
© Park Air Systems Ltd 2017
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.

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Foreword
This user documentation gives the necessary information for a user to install and understand the operation of
the radio 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

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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.
RoHS Directive 2011/65/EU compliant.
Warnings
A warning is used to show possible danger to personnel. In this documentation, warnings are shown by the
following symbols:
Cautions
A caution is used to show possible danger to the equipment. In this documentation, cautions are shown by the
following symbols:
Shows electrical danger to personnel
Shows a specified danger to personnel
Shows a non-ionizing radiation hazard
Shows the presence of electrostatic sensitive devices (ESDs)
Shows a specified danger to the equipment

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Dangerous voltage
You must be suitably qualified to terminate a mains supply to the equipment.
No user serviceable parts inside the radio
There are no user serviceable parts inside the radio. Access to the fan is from the rear of the radio.
Double pole/neutral fusing
The radio uses a power supply which has both live and neutral fuses.
AC socket-outlet
The AC socket-outlet must be installed near the radio and must have easy access.
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 cord/s is/are the radio’s disconnect supply device/s.
AC supply fuse rating
The radio AC supply must have a 5 Amp time-delay fuse fitted.
Unauthorized modifications
Changes or modifications made to equipment without the approval of Northrop Grumman, or parties
authorized by Northrop Grumman, could invalidate the user’s authority to operate the equipment.
ESDs
Modern electronic equipment contains Electrostatic Sensitive Devices (ESDs). Use necessary
precautions to prevent damage to such devices.
RF switch control signal
Only enable the RF switch control setting on a radio that is connected directly to either another
Park Air T6 radio’s internal relay or a Park Air solid-state relay. The DC signal used for switching these
relays can cause other equipment to not function correctly and reduce system performance.

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J4 LINK cable
Do not use a standard CAT 6 cable to connect a pair of radios’ LINK connectors. The white J4 LINK
cable is a non-standard cable and must be used. It connects a pair of radios configured for automatic
ACTIVE/INACTIVE control with the Park Air J4-4WEMSWITCH. Only pins 3 and 7 are connected.
Frequency counter accuracy
Make sure the stability, accuracy and resolution specifications of the frequency counter used exceed
that of the reference oscillator. Wherever possible, use an external frequency standard, for example,
GPS or an off-air standard.

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CE type approval
ĞĐůĂƌĂƚŝŽŶŽĨĐŽŶĨŽƌŵŝƚLJ
ŽŵƉĂŶLJ
ŝŶĨŽƌŵĂƚŝŽŶ
WĂƌŬŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞ ;ĂǁŚŽůůLJŽǁŶĞ ƐƵďƐŝ ŝĂƌLJŽĨEŽƌƚŚƌŽƉ
'ƌƵŵŵĂŶŽƌƉŽƌĂƚŝŽŶͿ
EŽƌƚŚĨŝĞů ƐDĂƌŬĞƚĞĞƉŝŶŐWĞƚĞƌďŽƌŽƵŐŚWϲϴh
нϰϰϭϳϳϴϯϰϱϰϯϰ
WƌŽĚƵĐƚŵŽĚĞů;ƉĂƌƚ
ŶƵŵďĞƌͿĂŶĚ
ĚĞƐĐƌŝƉƚŝŽŶ
WZ</Zdϲ
dϲͲZs;ϮϰͲϬϯϲϭϬϬϯϭϭĨŝƌŵǁĂƌĞϲϱͲϬϬϬϬϬϴϰϭϮͿ
'ƌŽƵŶ ƚŽĂŝƌƌĞĐĞŝǀĞƌĨŽƌƵƐĞŝŶƚŚĞs,&ĂĞƌŽŶĂƵƚŝĐĂůďĂŶ ƵƐŝŶŐ
ϮϱϴϯϯŬ,njĐŚĂŶŶĞůƐƉĂĐŝŶŐ
^ƚĂŶĚĂƌĚƐ EϲϬϵϱϬͲϭ;ϮϬϬϲнϭϮϬϭϬŝŶĐŽƌƉŽƌĂƚŝŶŐĂŵĞŶ ŵĞŶƚϭϭϮϬϬϵͿ
EϯϬϭϰϴϵͲϭ;sϮϭϭϮϬϭϲͲϭϭͿEϯϬϭϰϴϵͲϮϮ;sϭϯϭϮϬϬϯͲϭϭ
EϯϬϬϲϳϲͲϭ;sϭϱϮϮϬϭϭͲϬϯͿEϯϬϬϲϳϲͲϮ;sϮϭϭϮϬϭϱͲϭϮͿ
EŽƚŝĨŝĞĚďŽĚLJ dms^md;ϬϭϲϴͿ
KĐƚĂŐŽŶ,ŽƵƐĞŽŶĐŽƌ ĞtĂLJ^ĞŐĞŶƐǁŽƌƚŚEŽƌƚŚ&ĂƌĞŚĂŵ
,ĂŵƉƐŚŝƌĞWKϭϱϱZ>
hͲƚLJƉĞĞdžĂŵŝŶĂƚŝŽŶĐĞƌƚŝĨŝĐĂƚĞdͲZϬϬϬϬϮϯ

dŚŝƐ ĞĐůĂƌĂƚŝŽŶŽĨĐŽŶĨŽƌŵŝƚLJŝƐŝƐƐƵĞ ƵŶ ĞƌƚŚĞƐŽůĞƌĞƐƉŽŶƐŝďŝůŝƚLJŽĨƚŚĞŵĂŶƵĨĂĐƚƵƌĞƌ
dŚĞƉƌŽ ƵĐƚŚĂƐďĞĞŶƚĞƐƚĞ ƚŽƚŚĞůŝƐƚĞ ƐƚĂŶ Ăƌ ƐĂŶ ŝƐĐŽŶĨŝƌŵĞ ĂƐďĞŝŶŐŝŶĐŽŵƉůŝĂŶĐĞ
ǁŝƚŚƚŚĞĞƐƐĞŶƚŝĂůƌĞƋƵŝƌĞŵĞŶƚƐĂŶ ƉƌŽǀŝƐŝŽŶƐŽĨŝƌĞĐƚŝǀĞϮϬϭϰϱϯh;ZͿŝƌĞĐƚŝǀĞ
ϮϬϭϮϭϵh;tͿĂŶ ŝƌĞĐƚŝǀĞϮϬϭϭϲϱh;ZŽ,^ϮͿ
dŚĞƚĞĐŚŶŝĐĂů ŽĐƵŵĞŶƚĂƚŝŽŶƌĞůĞǀĂŶƚƚŽƚŚĞƉƌŽ ƵĐƚǁŝůůďĞŚĞů ĂƚWĂƌŬŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞ 
ĨŽƌŶŽƚůĞƐƐƚŚĂŶƚĞŶLJĞĂƌƐĂĨƚĞƌƚŚĞůĂƐƚƉƌŽ ƵĐƚŚĂƐďĞĞŶŵĂŶƵĨĂĐƚƵƌĞ 

EĞŝůhƉƚŽŶ
dĞĐŚŶŝĐĂůŝƌĞĐƚŽƌWĂƌŬ ŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞĚ

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ĞĐůĂƌĂƚŝŽŶŽĨ^ƵŝƚĂďŝůŝƚLJĨŽƌhƐĞ
ŽŵƉĂŶLJ
ŝŶĨŽƌŵĂƚŝŽŶ
WĂƌŬŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞ ;ĂǁŚŽůůLJŽǁŶĞ ƐƵďƐŝ ŝĂƌLJŽĨEŽƌƚŚƌŽƉ
'ƌƵŵŵĂŶŽƌƉŽƌĂƚŝŽŶͿ
EŽƌƚŚĨŝĞů ƐDĂƌŬĞƚĞĞƉŝŶŐWĞƚĞƌďŽƌŽƵŐŚWϲϴh
нϰϰϭϳϳϴϯϰϱϰϯϰ
WƌŽĚƵĐƚŵŽĚĞů;ƉĂƌƚ
ŶƵŵďĞƌͿĂŶĚ
ĚĞƐĐƌŝƉƚŝŽŶ
WZ</Zdϲ
dϲͲZs;ϮϰͲϬϯϲϭϬϬϯϭͿ
'ƌŽƵŶ ƚŽĂŝƌƌĞĐĞŝǀĞƌĨŽƌƵƐĞŝŶƚŚĞs,&ĂĞƌŽŶĂƵƚŝĐĂůďĂŶ ƵƐŝŶŐ
ϮϱϴϯϯŬ,njĐŚĂŶŶĞůƐƉĂĐŝŶŐ
^ƚĂŶĚĂƌĚƐ EϯϬϬϲϳϲͲϭ;sϭϱϮϮϬϭϭͲϬϯͿEϯϬϬϲϳϲͲϮ;sϮϭϭϮϬϭϱͲϭϮͿ
ͲϭϯϳǀŽůƵŵĞƐϭϰĂŶ ϱ
ŽŶĚŝƚŝŽŶƐŽĨƵƐĞ /ŶĨŽƌŵĂƚŝŽŶŽŶƵƐĞƉĞƌĨŽƌŵĂŶĐĞĞŶǀŝƌŽŶŵĞŶƚŝŶƐƚĂůůĂƚŝŽŶĂŶ 
ŵĂŝŶƚĞŶĂŶĐĞĐĂŶďĞĨŽƵŶ ŝŶƚŚĞƉƌŽ ƵĐƚƵƐĞƌ ŽĐƵŵĞŶƚĂƚŝŽŶdϲͲ
Ͳh^ZͲZsͲE

dŚĞƉƌŽ ƵĐƚŚĂƐďĞĞŶƚĞƐƚĞ ƚŽƚŚĞůŝƐƚĞ ƐƚĂŶ Ăƌ ƐĂŶ ŝƐ ĞĐůĂƌĞ ĂƐďĞŝŶŐŝŶĐŽŵƉůŝĂŶĐĞ
ǁŝƚŚƚŚĞĞƐƐĞŶƚŝĂůƌĞƋƵŝƌĞŵĞŶƚƐĂŶ ƉƌŽǀŝƐŝŽŶƐŽĨŝƌĞĐƚŝǀĞϮϬϭϰϱϯh;ZͿ
/ŶƚĞƌŽƉĞƌĂďŝůŝƚLJZĞŐƵůĂƚŝŽŶ;ͿEŽϱϱϮϮϬϬϰ/ŶƚĞƌŽƉĞƌĂďŝůŝƚLJĐŚĂŶŶĞůƐƉĂĐŝŶŐ;ͿEŽ
ϭϬϳϵϮϬϭϮĂŶ /KŶŶĞdžϭϬĞ ŝƚŝŽŶϮǀŽůƵŵĞϯƉĂƌƚϮĐŚĂƉƚĞƌϮĂŶ ŝƐƚŚĞƌĞĨŽƌĞƐƵŝƚĂďůĞ
ĨŽƌdDƵƐĞ
dŚĞƚĞĐŚŶŝĐĂů ŽĐƵŵĞŶƚĂƚŝŽŶƌĞůĞǀĂŶƚƚŽƚŚĞƉƌŽ ƵĐƚǁŝůůďĞŚĞů ĂƚWĂƌŬŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞ 
ĨŽƌŶŽƚůĞƐƐƚŚĂŶƚĞŶLJĞĂƌƐĂĨƚĞƌƚŚĞůĂƐƚƉƌŽ ƵĐƚŚĂƐďĞĞŶŵĂŶƵĨĂĐƚƵƌĞ 

EĞŝůhƉƚŽŶ
dĞĐŚŶŝĐĂůŝƌĞĐƚŽƌWĂƌŬ ŝƌ^LJƐƚĞŵƐ>ŝŵŝƚĞĚ

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Park Air Sapphire
The Sapphire concept builds on almost 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 customer’s 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 world’s 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.

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V2 Park Air 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: [email protected]
Telephone (24 hours): Within the UK, 01778 381557
International, [phone]
Mail: Customer Services Department
Northrop Grumman
Park Air Systems Ltd
Northfields
Market Deeping
Peterborough PE6 8UE
UK
Web Site: www.northropgrummaninternational.com/capabilities/aviation-customer-support
Mobile App: The free Park Air Sapphire app is available from the App Store™ and Google Play™.

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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 - standalone, the Park Air C4 cabinet and legacy T6 cabinet
Section 4. Front panel operation - how to use the Park Air T6-RV
Section 5. Web server operation - how to use the web server hosted in the radio
Section 6. Maintenance - periodic tasks and part replacement
Section 7. Connector information - interface types and levels
Section 8. Specification
Section 9. Associated equipment
Quick start - a copy of the quick start guide supplied with the radio
Index - to help the reader find keywords and topics.
A cross-reference to a section is shown as the section or sub-section number and the title. An example is,
4.2.4 Information.
A cross-reference to a page is shown as the page number. An example is, page 4-3.
A glossary of terms can be found in Glossary of abbreviations, acronyms and technical terms on page xii. To help
the reader, the first time a term is used in the book, it is italicized 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 a product 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:
AC input
Example
AC input connector
Connector Connection Characteristics
AC input
IEC-C16
chassis plug
Neutral
Input supply: 99 to 264 V AC. Frequency: 47 to 63 Hz.
No more than 55 VA while the radio transmits under any condition.
Earth
Live
Note:
The connections are shown as viewed on the rear panel of the radio.
Example

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Glossary of abbreviations, acronyms and technical terms
A Ampere
AC alternating current
ACARS aircraft communications addressing and reporting system
Active The radio is operationally active (IP RRC terminology)
AGC automatic gain control
ALC automatic level control
AM amplitude modulation
ATC air traffic control
ATM air traffic management
baud symbol rate or modulation rate in symbols per second or pulses per second
BIT built-in-test
co-location Refers to radios densely sited in space and/or frequency
CPLD complex programmable logic device
dB decibel
dBm dB relative to 1 mW
dBr dB relative to a specified level
DC direct current
ED-137 Interoperability standards for VoIP ATM components
ESD electrostatic sensitive device
Ethernet Computer network technologies
E1 E-carrier system frame structure (ITU-T adopted)
E-BIT external bit signal
GPS Global Positioning System
HDB3 coding High density bipolar of order 3 used in European E-carrier system
HMI Human Machine Interface
HTTPS Hypertext transfer protocol within a connection encrypted by transport layer security (TLS)
Hz Hertz
ICAO International Civil Aviation Organization
IEC International Electrotechnical Commission
Inactive The radio is operationally inactive (IP RRC terminology)
Inhibit(ed) Radio is prevented from transmitting and/or receiving by the user
IP Internet Protocol
ITU-T International Telecommunication Union - Telecommunications Standardisation Sector
kg kilogram
LAN local area network
LED light emitting diode
m metre
MAC media access control
Main/standby The radio is operationally main or standby (analogue radio control terminology)
MARC multi access remote control
Mbits megabits
Mute Function which silences transmit audio that is below a set level

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Glossary of abbreviations, acronyms and technical terms (continued)
Network jitter Variation in packet transit delay
Off-air standard An extremely high stability RF frequency source, for example GPS
Ohm unit of resistance
OLED organic light emitting diode
Phantom PTT DC control voltage applied to transmit audio input lines
Phantom squelch DC control voltage applied to receive audio output lines
pk-pk peak to peak
ppm parts per million
PTT press-to-transmit or push-to-talk
RCMS remote control and monitoring system
RF radio frequency
RJ45 8 position 8 contact (8P8C) connector
rms root mean square
RRC radio remote control
RSSI received signal strength indication
RS422 Differential signalling standard
RS485 Differential signalling standard for networks
Rx or RX receiver
SCT simultaneous call transmission
SDR software defined radio
Self-receiving The radio outputs its transmitted audio on its receive audio lines
SNMP Simple Network Management Protocol
squelch receive audio/audio level is stopped
subnet mask Defines the division between network and host parts of an IP address
Tone keying single frequency tone applied to transmit audio input lines used as the PTT signal
Tone squelch single frequency tone applied to receive audio output lines used as the squelch signal
TR transceiver
TTL transistor-transistor logic
Tx or TX transmitter
UHF ultra high frequency
USB universal serial bus
VVolt
VA Volt-Ampere
VCCS voice communications control system
VDL Mode 2 VHF air-ground Digital Link, data transmission Mode 2
VHF very high frequency
VoIP Voice over Internet Protocol
VSWR voltage standing wave ratio
WWatt
4-wire E & M Analogue transmit and receive audio with squelch and PTT signalling

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Cyber security recommendations
(1) Change the default password on your equipment - the T6 web server is provided with a default password
as described in this documentation, this should be changed on all equipment immediately after
installation.
(2) Change your passwords on a regular basis - the T6 web server requires a password to be accessed, these
passwords should be changed regularly.
(3) Backup the configuration of each piece of equipment on a regular basis - this will ensure that if a piece
of equipment is attacked it can be restored quickly and easily.
(4) Test backups to make sure they work and you have the data and configurations you need - restore your
data and/or configuration to another piece of equipment to check that the backups you are taking will
work when you need them most.
(5) Secure equipment physically - this prevents access to equipment for unauthorised personnel and should
include secure rooms and locking USB and Ethernet ports.
(6) Keep backup media secure - this should include both physical security, such as fire-proof storage in an
off site location, and cyber security, such as password protection that follows the advice previously
given.
(7) Document network set up - keep an up to date record of your network set up to help restore it quickly
in the event of an attack.
(8) Set locks on the radio - the front panel, IP ports and E1 port on the Park Air T6 radio can be locked from
the web server.

T6-D-USER-RV-EN Page 1-1 Overview
© Park Air Systems Limited 2017
1 Overview
1.1 Introduction
The Park Air T6-RV VHF receiver is a class-leading analogue and IP, voice and data radio, with the flexibility for
any ATC scenario, integrated into a small light package.
The Park Air T6-RV options:
There are four frequency range options that extend from 112 to 155.975 MHz
Software defined analogue and digital waveform options
Park Air SCT - Simultaneous Call Transmission detection.
The options are shown in 1.2.2 Park Air T6-RV options.
The Park Air T6-RV features:
Class-leading RF co-location performance
Less power consumption
Extended service interval and service lifetime
2U height and half-width (compared to 19-inch standard fitting)
Tool-free installation into the Park Air C4 cabinet
No materials specified in the Restriction of Hazardous Substances (RoHS 2)
Backwards compatibility with the legacy T6 range for example, the Park Air E1-RIC.
The radio’s IP connectivity provides:
VoIP operation in accordance with all editions of ED-137
Monitoring and control in accordance with ED-137
Comprehensive monitoring and control of radio features through SNMP v1, v2c and v3
HTTPS web server interface.
The Park Air T6-RV accessories:
Connector kit
Mounting adaptor for legacy cabinets.
The accessories are shown in 1.2.3 Park Air T6-RV accessories.

T6-D-USER-RV-EN Page 1-2 Overview
© Park Air Systems Limited 2017
1.1.1 Standalone operation
The Park Air T6-RV can be used as a standalone desktop radio with the addition of a suitable AC and/or DC supply,
a VHF antenna and a headset. Park Air Sapphire products are:
Park Air T6-A-CK connector kit
Park Air S2-HST6 headset.
Installation details are shown in 3.1 Park Air T6 standalone installation.
1.1.2 Park Air C4 cabinet installation
The Park Air T6 radios and Park Air Z4 filters are specifically designed to fit the Park Air C4 cabinet. The C4 cabinet
(40U) can accommodate up to 40 T6 radios or Z4 filters.
The Park Air C4 options:
40U or 30U capacity.
Typical T6 radio and Z4 filter installation (rear):
Installation details are shown in 3.2 Park Air C4 cabinet installation.

T6-D-USER-RV-EN Page 1-3 Overview
© Park Air Systems Limited 2017
1.2 Park Air T6-RV
The product codes and product names of the radio, options, accessories and documentation for the T6-RV radio.
1.2.1 Park Air T6-RV product code
1.2.2 Park Air T6-RV options
1.2.3 Park Air T6-RV accessories
1.2.4 Park Air T6-RV documentation
Product code Product name Notes
T6-RV VHF receiver
Product code Product name Notes
T6-O-112-137 112 MHz to 137 MHz frequency range for T6 radios
T6-O-112-156 112 MHz to 156 MHz frequency range for T6 radios
T6-O-118-137 118 MHz to 137 MHz frequency range for T6 radios
T6-O-118-156 118 MHz to 156 MHz frequency range for T6 radios
T6-O-AMV AM-voice waveform for T6 radios Includes VoIP in accordance with all editions of
ED-137
T6-O-SCT Simultaneous Call Transmission detection algorithm for T6
radios
Product code Product name Notes
T6-A-CK Connector kit for T6 radios
Includes AC mains power lead, DC power
connector, N-type connector and RJ45 to RJ45
patch cable
T6-A-CMA1 Cooper B-Line cabinet mounting adaptor for one or two T6
radios
Product code Product name Notes
T6-D-USER-RV-EN User documentation for T6-RV in English

T6-D-USER-RV-EN Page 1-4 Overview
© Park Air Systems Limited 2017
1.3 Features
1.3.1 Web server
A web server is hosted in the radio. The web server can be accessed via a network connection to any of the IP
ports on the radio.
The web server monitors the radio and changes the settings. The web server provides greater control of radio
settings than the front panel.
Options and firmware can be installed via the web server.
See 5 Web server operation on page 5-1 for further information.
1.3.2 Simultaneous Call Transmission (SCT) detection
The Park Air T6-RV VHF receiver is able to detect, and alert the operator of, Simultaneous Call Transmission
events as defined in ED-137.
With the SCT option installed and enabled, if an SCT event is detected by the receiver, the radio alerts the
connected VCCS equipment via the IP connection. The VCCS then alerts the operator.
With the audio alert enabled, the radio provides an audible alert to the operator via the IP, E1 and audio
connection(s) as appropriate.
The SCT option can be turned on and off from the radio front panel and the web server, see 4.2.1 Settings on
page 4-2 and 5.2.1 Settings on page 5-2. The audio alert and the detection algorithm are configurable via the
radio’s web server, see 5.2.1 Settings on page 5-2.
1.3.3 Internal RF switch control
The internal RF relay can be used to switch the RF path between a main/standby or transmit/receive pair. The
radios are linked using the ANTENNA and RF LINK connectors, see 2.3 Antenna configurations on page 2-8.
Use the web server to enable the RF switch control setting, see 5.2.1 Settings on page 5-2. With the setting
enabled and the radio keyed, a DC signal is present on the ANTENNA connector.
The RF switch control setting can also be used to control the Park Air Z4-SSRELAY solid-state relay without a
facilities connection, see 2.3 Antenna configurations on page 2-8.
RF switch control signal
Only enable the RF switch control setting on a radio that is connected directly to either another
Park Air T6 radio’s internal relay or a Park Air solid-state relay. The DC signal used for switching these
relays can cause other equipment to not function correctly and reduce system performance.

T6-D-USER-RV-EN Page 2-1 Description
© Park Air Systems Limited 2017
2 Description
The T6-RV interfaces are shown in this section.
2.1 Front panel interfaces
Control Notes
On/off switch Front panel on/off of the radio See 2.1.1 On/off switch
Display Parameter fields and soft function icons See 2.1.2 Display
Soft function keys See 2.1.3 Soft function keys
Busy indicators See 2.1.5 Busy indicator
Rotary/push switch Volume control, display control and selection See 2.1.6 Rotary/push switch
Status indicator BIT and radio inhibit status See 2.1.7 Status indicator
Connector Connectivity
LAN 3 10/100 Mbps, RJ45
See LAN 3 connector on page 7-1
Reference
frequency
monitor
20 MHz high impedance output,
SMB
See Reference frequency monitor connector on page 7-1
Microphone/
headset Receive audio, LEMO™
See Microphone/headset connector on page 7-1
Busy indicators Rotary/push switch
Display
On/off switch
Soft function keys Status indicator Loudspeaker
Microphone/headset
connector
Reference frequency
monitor connector
LAN 3 connector
Laptop
Headset

T6-D-USER-RV-EN Page 2-2 Description
© Park Air Systems Limited 2017
2.1.1 On/off switch
Note:
This action symbol is used in the document.
2.1.2 Display
This is a high resolution OLED display.
2.1.3 Soft function keys
There are three soft function keys below the display. Soft function icons are displayed above the keys and shown
in 2.1.4 Soft function icons.
2.1.4 Soft function icons
2.1.5 Busy indicator
Control Notes
On/off switch The power cord is the power disconnect device.
Soft function icon Function Notes
Home
Menu
Squelch override The busy indicator illuminates
Receive inhibited The soft function key is disabled
Back Previous menu
Left or right Moves the cursor
Enter Same as when the rotary/push switch is pushed
Save
Busy indicator Function Notes
The radio receives The busy indicator illuminates amber.
A signal is present or the squelch has been defeated


Note:
In the example, two parameter fields are
shown and one is blank. Up to three
parameter fields can be shown or blank.
The display brightness decreases after 24
hours
Parameter fields
Soft function key icons