911 Automatic antenna tuner The Barrett 911 automatic antenna tuner is designed for operation in both marine mobile and land base station installations.

Housed in a fully weatherproof enclosure the 911 will tune long wire antennas, wire loop antennas or whip antennas over a frequency range of 2 to 30MHz. Tuning is rapid, typically less than two seconds the first time RF is applied, either whilst the operator is talking or when the “Tune” control is activated on the transceiver.

The 911 tuner features a memory facility that stores the configuration required to tune to a frequency. On any subsequent use of that frequency the 911 reconfigures to the stored settings in typically 25 milliseconds. Following initial tuning the antennas VSWR is monitored. If any significant variation occurs the 911 will re-tune the antenna automatically.

The 911 is supplied complete with fully terminated control cables having an overall length of 6 metres. This comprises of a 1.5 metre stub cable with a 4.5 metre extension cable for connection to the transceiver. The cable is a composite design incorporating coaxial, power supply and control cables. Additional extension cables are available as required.

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Barrett has a long held reputation for the supply and support of HF communications equipment to the aid and humanitarian markets.

Barrett HF equipment provides easily installed, simple and reliable voice and HF based email communications in areas that have either poor communications infrastructure or where previous communications infrastructure has been destroyed.

Our commitment in the form of regular field support trips to assist in mission start ups throughout the world is well known.

Organisations and missions supported include:
. UNDPKO . UNAMA . Red Cross
. UNMET . Red Crescent . UNMOGIP
. UNMIL . UNAMI . UNAMSIL
. UNMID . UNICEF . UNIIC
. WFP

Barrett products suitable for use in these areas include:
Barrett 2050 HF transceiver
Barrett 2019 Automatic tuning mobile antenna
Barrett 2050 Wireless control HF transceiver
Barrett 2060 Automatic telephone interconnect
Barrett 2020 HF email system
Barrett 2062 HF-VHF/UHF crossgate
Barrett HF communications equipment provides vital communications for law enforcement and security organisations internationally.

Security organisations in places such as Iraq, Timor, Kazakhstan, Papua New Guinea, Solomon Islands and a number of African and South American countries have utilised Barrett's communications products where reliable and secure communications are paramount.

These organisations include:
. Police forces
. National Guard
. Customs
. Border Patrol
. Coast Guard
. Drug enforcement agencies
. Private security firms

Barrett products suitable for use in these areas include:
Barrett 2050 HF transceiver
Barrett 2019 Automatic tuning mobile antenna
Barrett 2050 Wireless control HF transceiver
Barrett 2060 Automatic telephone interconnect
Barrett 2020 HF email system
Barrett 2062 HF-VHF/UHF crossgate
Barrett HF communications equipment is ideally suited to provide primary and backup communications for the following

Public sector areas that include:
. Remote health provision . Forestry
. Telecommunications . Post
. Emergency services . Transport
. Agriculture . Fisheries
. Environmental protection . Energy
. Embassies . Consulates

Private sector industries that include:
. Mining . Agriculture
. Construction . Energy
. Transportation . Shipping

We also serve a significant recreational vehicle user market.

Barrett products suitable for use in these areas include:
Barrett 2050 HF transceiver
Barrett 2019 Automatic tuning mobile antenna
Barrett 2050 Wireless control HF transceiver
Barrett 2060 Automatic telephone interconnect
Barrett 2020 HF email system
Barrett 2062 HF-VHF/UHF crossgate
Barrett 2075 300 W to 1 kW HF transmitters
Our turnkey network design team will take your system requirements and produce an initial technical proposal.

On customer approval this initial technical proposal is finalised into a detailed technical document with system manuals and full installation programs.

Barrett turnkey systems have been used in areas that include:
HF systems for Air Traffic Control
Remote sited HF transmitters and receivers linked by landlines or microwave
LAN based control systems for remote sited HF transmitters and receivers
Operator consoles, Custom built interfaces, control systems, operator positions
MIL-STD HF data systems including 5066 stack based systems
Integration of new HF transmitters and receivers into existing systems
Turnkey mission based installations for humanitarian organisations
Vehicle tracking systems
High power transmitters for GMDSS systems
High power HF email and data systems
Military HF networks

All Barrett Communications products can be incorporated into a custom turnkey HF network depending on customer requirements.
Barrett 1 kW high power HF transmitters and remote HF receivers along with our 2076 remote site interface are used in conjunction with TransOceana DSC systems for GMDSS coast stations.

GMDSS coast stations that include Barrett equipment have been installed in various countries including Mauritius, Namibia and Thailand.

Barrett products used in these applications:
Barrett 2075 high power transmitters
Barrett 2050 HF receivers
Barrett 2076 remote site controllers
Barrett 2071 HF Rx multi-coupler
Barrett 912 broadband dipoles
Barrett 902 series masts
Military forces rely on HF and low band VHF radio to provide secure and highly reliable communications in demanding applications and environments.

Barrett HF radio and low band VHF communications equipment are more secure, autonomous and resistant to jamming than other communications mediums.

Barrett HF tactical transceivers provide:
. MIL-STD 188-141B ALE
. Frequency hopping
. AES and DES voice encryption

Barrett low band VHF tactical transceivers provide:
. Voice and data encryption
. Frequency hopping

Barrett products suitable for use in these areas include:
Barrett PRC-2090 tactical HF system
Barrett PRC-2080 tactical VHF system