AT7000B/RAT1000C
Antenna Tuner
AT7000B 125W Automatic Antenna Tuner
The AT7000B is a 125W HF automatic antenna tuner specifically designed
to interface with Datron’s TW7000 HF transceiver to tune whip and longwire 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, fiberglass case which is immersible and can be
mounted in any attitude, but should be located as close as 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.
A 100 channel memory is standard in the tuner in order to permit
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 channel is
selected. Channel tuning time in memory mode is less than 10 ms.
The AT7000B is designed to interface to the TW7000 radio 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.
• Automatic antenna tuning
• 125W RF power handling
• 100 Channel memory for rapid tuning
– ALE and silent tuning applications
• MIL-STD-810 for environmental
performance
• Tunes whips and long wire antennas
• Control Interface to TW7000
transceiver
The AT7000B 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 3030 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 TW7000 HF transceiver and can also 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.
• Completely automatic
antenna tuning
• 100 Channel memory
- ALE and silent tuning applications
• 1 kW RF power rating
(designed for use in data systems)
• MIL-STD-810 for
environmental performance
• Tunes whips and long
wire antennas
• Control interface to TW7000
transceiver
• Waterproof
A control interface specific to the TW7000 transceiver is resident inside
the RAT1000C. Upon initial tune, the antenna VSWR is monitored, and if it
is outside a preset limit, the tuner will automatically initiate a tune cycle.
Matching is accomplished and controlled by the intelligent tuning algorithm,
which automatically arrives at the optimum tuner element setting for any
specific antenna load impedance. The RAT1000C will tune almost any end-fed
antenna within the specified frequency range provided an effective ground
system is employed.
The RAT1000C is designed for continuous operation under severe 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 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.
In addition to the first-time automatic tuning mode, the RAT1000C has a
built-in 100-channel memory that allows “silent tuning” and permits a
retune mode whereby the tuning elements are automatically repositioned
to a predetermined condition in less than 20 msecs. This “retune” mode is
utilized when the associated radio system is operating in an ALE mode.
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