Beyerdynamic AT 71 Operating Instructions Manual
Operating Instructions
Non-contractual illustrations. Subject to change without notice.
beyerdynamic GmbH & Co. KG
Theresienstr. 8 | 74072 Heilbronn | Germany
Tel.: +49 (0)7131 / 617-440 | Fax: +49 (0)7131 / 617-204
info@beyerdynamic.de | www.beyerdynamic.com
AS111024
Technical Specifications
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Bandwidth:
Gain:
Amplifier gain:
VSWR (Voltage Standing Wave Ratio):
Power consumption:
Connector:
Dimensions:
Weight:
470 MHz to 1GHz
2 4 dBi
12 1 dB (RX connector), 0 dB (RX/TX connector)
2 1 (RX connector), 2 1 (RX/TX connector)
1120 mW (RX connector), 0 mW (RX/TX connector)
TNC female
120 261 32 mm
200 g
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& IC - ID
THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES AND RSS-123 ISSUE2 OF
CANADA. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:
(1) This device may not cause interference.
(2) This device must accept any interference, including inteference that may cause
undesired operation of the device. This equipment complies with FCC RF radiation
exposure limits set forth for an uncontrolled environment.
Disposal
2005 -08-1 3
Never dispose used batteries with domestic waste.
Batteries / NiCad cells often contain heavy metals such as cadmium
(Cd), mercury (Hg) and lead (Pb) that makes them unsuitable for
disposal with domestic waste. You may return used
batteries/rechargeable batteries free of charge to local collection
points or recycling centres.
By doing so, you contribute to the conversation of the environment!
2 CE 44 7 A
AT 71
Omnidirectional Antenna
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When using the RX connector , please note that the inner wire of the antenna cable
does not touch the case itself. As the connector is provided with 8V DC, a short circuit
could occur.
The RX connection can only be connected to receivers and not to transmitters. When
connecting to transmitters, the transmitter can be damaged.
The shorter the length of the coaxial cable to connect the TX/RX connector to a
receiver, the better. The cable length should not exceed 20 m, otherwise the signal
strength could decrease too much. The coaxial cable, however, which is connected to
the RX connector should be longer than 20 m, otherwise the integrated booster
could cause an over-gain and therefore a signal saturation, which can result in a
deterioration of the anti-interference feature. The sensitivity will be improved by using
the RX connector , but the anti-interference feature may deteriorate.
The AT 71 omnidirectional antenna operates in the frequency range of 470 MHz to
1 GHz. The AT 71 can be used as a receiving or transmitting antenna. The integrated
12 dB booster has been designed to increase the signal strength with longer distances
and to compensate signal loss when using longer cables. The booster is powered via
coaxial cables, which are connected to antenna splitters or receivers with TNC
connectors. The AT 71 is ideal for both indoor and outdoor applications.
RX antenna cable connector:
Power LED:
TX/RX antenna cable connector:
Swivel adapter bracket:
The connector is provided with an integrated 12dB
booster, which is necessary when the antenna cable length exceeds 20 metres and
when the antenna is connected to a receiver or antenna splitter with an output power
of 8V DC.
The LED will illuminate at a power input of 8V DC from receivers. At the
same time the booster will start to operate.
Transmission output or antenna input, 0 dB, can
be connected to transmitters or receivers by using a cable with a maximum length of
20 m.
Can be mounted on a tripod or can be used with the
MS-50 wall-mounting kit.
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The TX/RX antenna cable connector can be connected to transmitters, receivers,
antenna combiners and antenna splitters with TNC socket by using an antenna cable
with a maximum length of 20 metres.
The RX connector can be connected to a receiver or antenna splitter by using an
antenna cable longer than 20 metres. After switching on, please check the power LED
of the antenna. If the LED is not illuminated, the integrated booster does not operate.
In order to achieve best results, adjust the antenna to a proper position.
! Mount the antenna onto a tripod or on top of the MS-50 wall-mounting kit as shown
in the illustrations below.
Supplied Accessory
1 x Operating Instructions
1 x 3/8" Adapter
Controls and Indicators
(Figure 1 )
Installation
(Mounting on the MS-50 wall-mounting kit)
(Figure 3)
(Mounting on a tripod)
(Figure 2)
Notes
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AT 71 Omnidirectional Antenna
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AT 71 Omnidirectional Antenna
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