RAT7000B/RAT1000C

Antenna Tuner

RAT7000B 125W Automatic Antenna Tuner • Automatic antenna tuning

The RAT7000B is a 125W HF automatic antenna tuner specifically designed
to interface with Datron’s RT7000 and PRC1099A HF transceivers to
• 125W RF power handling
tune whip and long-wire antennas. The tuner is designed for operation
under the severe environmental conditions that can be encountered in
mobile usage. It is contained in a rugged, metal case which is immersible • 100 Channel memory for rapid tuning
and can be mounted in any attitude, but should be located as close as – ALE and silent tuning applications
possible to the radiating portion of the antenna for maximum system
efficiency. The tuner comes with a set of brackets for convenient mounting
to any surface in any orientation. An optional shock mount is available for
• MIL-STD-810 for environmental
the RAT7000B. performance
A 100 channel memory is standard in the tuner in order to permit
• Tunes whips and long wire antennas
scanning, ALE, and other silent tune applications. After each channel
has been initially tuned, the tuner “remembers” the settings for that
particular channel and automatically reverts to them each time that • Control Interface to RT7000 &
channel is selected. Channel tuning time in memory mode is less PRC1099A transceivers
than 10 ms.

The RAT7000B is designed to interface to the RT7000 or PRC1099A

radios via a RS485 serial port. This bi-directional port provides 9600 baud
communications with the radio enabling rapid selection of previously tuned
channels from the tuner memory. The tuner can also be used with other HF/
SSB transceivers provided a suitable RF and control interface is provided.

The tuner is designed primarily for use with end-fed, unbalanced antennas
(whips and long wires). It will effectively tune almost any antenna of this
type within the specified frequency range provided a good ground system
is used with the antenna.

The RAT7000B can be installed in a specific location and left there

indefinitely. It will provide continuous, reliable operation without requiring
periodic maintenance of any kind. It requires no adjustment during setup
and needs no re-alignment over time.

www.dtwc.com +1-760-597-1500 3055 Enterprise Court, Vista, CA 92081 USA

 RAT1000C 1000W Antenna Tuner
The RAT1000C is a 1kW automatic antenna tuner developed to interface
directly with Datron’s RT7000 HF transceiver and also can be used with any
HF transceiver having an appropriate RF power output and control interface.
The RAT1000C is designed to automatically match the 50 ohm output of the
transmitting system to a wide variety of end-fed unbalanced antennas such as
whips and long wires. The tuner can provide tactical security by permitting
remote location of the antenna up to 200 meters from the associated transmitter.

A control interface specific to the Datron RT7000 transceiver is resident inside

the RAT1000C. Upon initial tune, the antenna VSWR is monitored, and if it is
• Completely automatic
outside a preset limit, the tuner will automatically initiate a tune cycle. Matching
antenna tuning is accomplished and controlled by the intelligent tuning algorithm, which auto-
matically arrives at the optimum tuner element setting for any specific antenna
• 100 Channel memory - ALE and load impedance. The RAT1000C will tune almost any end-fed antenna within the
specified frequency range provided an effective ground system is employed.
silent tuning applications
The RAT1000C is designed for continuous operation under severe
• 1 kW RF power rating (designed environmental conditions. It is housed in a rugged, waterproof metal case
that should be mounted as close as possible to the radiating part of the
for use in data systems) antenna. Optional shock mounts may be used to mount the tuner to any
convenient surface in a vehicle, on a ship, or in a base station configuration.
• MIL-STD-810 for
In addition to the first-time automatic tuning mode, the RAT1000C has a built-
environmental performance
in 100-channel memory that allows “silent tuning” and permits a retune mode
whereby the tuning elements are automatically repositioned to a predetermined
• Tunes whips and long condition in less than 20 msecs. This “retune” mode is utilized when the
wire antennas associated radio system is operating in an ALE mode.

• Control interface to RT7000

transceiver

• Waterproof
RAT 7000B
General
• RF power input 125W PEP
• Duty cycle All modes including data operation, within
constraints of internal temperature
(see temperature spec)
• Frequency range 2 to 30 MHz
• Tuning range
whips and wires with minimum specified length
10 foot whip: 2.5 - 30 MHz
16 foot whip: 2 - 30 MHz
32 foot whip: 1.6 - 30 MHz
75 to 150 foot long wires: 2 - 30 MHz
NOTE: effective tuning depends on setting
up a good ground system in conjunction
with the antenna
• RF tune power 10W
• Tune time 3 - 5 s, initial tune (typical)
20 ms, memory tune (typical)
• Input impedance 50 Ohms
• Power requirements 12Vdc, 1.8A, max
• Memory channels 100
• Tuning accuracy 1.5:1 VSWR (typical)
• Continuous duty The minimum antenna lengths stated
operation (FSK) here must be adhered to:
75ft (2-30 MHz)
32ft (3-30 MHz)
16ft (5-30 MHz)
10ft (7-30 MHz)
• Control interface RT7000-series and PRC1099A

Mechanical, Environmental
• Size 5.25” x 13” x 16” (13.3 cm x 33 cm x 40.6 cm);
(H x W x D)
• Weight 13.8 lbs, (6.27 kg)
• Construction sealed metal case, MIL connectors;
• Temperature -30 to +60 degrees C (ambient inside case)
(operating) NOTE: this temperature can easily be exceeded if
the case is exposed to direct sunlight. For FSK
operation, it is important that the tuner is installed
so that the case is not exposed to direct sunlight.
• Shock, vibration MIL-STD-810 (with shock mount)
• Immersion Waterproof; immersion to 3 feet

Controls and Indicators

• Connectors MIL connectors: RF input, control input,
RF output; grounding lug

www.dtwc.com
 RAT7000B/RAT1000C
Antenna Tuner

RAT1000C
General
• RF power input 1000W, PEP or Average
• Duty cycle All modes including data operation,
within constraints of internal temperature
(see temperature spec)
• Frequency range 2 to 30 MHz
• Tuning range versus
16 foot whip: 3 - 30 MHz
antenna type
32 foot whip: 2 - 30 MHz
75 to 150 foot long wires: 2 - 30 MHz
NOTE: effective tuning depends on setting up
a good ground system in conjunction with
the antenna
• RF tune power from 10W
associated transceiver
• Tune time 3 - 5 s, first tune (typical)
Datron World Communications, Inc. < 20 ms, memory tune
• Input impedance 50 Ohms
3055 Enterprise Ct. • Input power requirements 28Vdc, 4A peak, 1.8A, average
• Tuning accuracy 1.5:1 VSWR, typical
Vista, CA, USA 92081 • Memory channels 100

Tel: +1-760-597-1500 Mechanical, Environmental

• Size 11.8” x 13.4” x 19.3” (30 cm x 34 cm x 49 cm);
Fax: +1-760-597-1510 (H x W x D)
• Weight 48 lbs (22 kg)
E-mail: sales@dtwc.com • Temperature (operating) -30 to +55 degrees C. (ambient inside case)
NOTE: this temperature can easily be exceeded
Web: http://www.dtwc.com if the case is exposed to direct sunlight. For FSK
operation, it is important that the tuner is installed
so that the case is not exposed to direct sunlight.
• Shock, vibration MIL-STD-810 (with shock mount)
• Immersion Waterproof; immersion to 3 feet
• Humidity, fungus, MIL-STD-810
sand & dust, salt, fog

Controls and Indicators

• Connectors RF input, control input, RF output, grounding lug

* Subject to export regulations

Specifications subject to change without notice - rev 0111
Made in the USA

www.dtwc.com