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AC 3
Active Antenna Combiner
Bedienungsanleitung
Instruction manual
Notice d'emploi
Manual de instrucciones
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Istruzioni per l'uso
Manual de instruções
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1
Contents
Contents
Important safety instructions ........................................................ 2
The AC 3 active transmitter combiner ......................................... 4
Delivery includes ............................................................................... 4
Operating controls ............................................................................ 5
Block diagram .................................................................................... 6
Putting the AC 3 into operation .................................................... 7
Preparing the AC 3 for use
............................................................ 7
Using the AC 3 ................................................................................. 12
Cleaning the AC 3 ........................................................................... 13
If a problem occurs ... ..................................................................... 14
Accessories ...................................................................................... 15
Specifications .................................................................................. 16
Manufacturer Declarations ........................................................... 17
Thank you for choosing Sennheiser!
We have designed this product to give you reliable operation
over many years. Over 60 years of accumulated expertise in the
design and manufacture of high-quality electro-acoustic equip-
ment have made Sennheiser a world-leading company in this
field.
Please take a few moments to read these instructions carefully,
as we want you to enjoy your new Sennheiser products quickly
and to the fullest
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2
Important safety instructions
Important safety instructions
· Read this instruction manual.
· Keep this instruction manual. Always include this instruction
manual when passing the device on to third parties.
· Heed all warnings and follow all instructions in this instruc-
tion manual.
· Clean only with a slightly damp cloth.
· Refer all servicing to qualified service personnel.
Servicing is required if the device has been damaged in any
way, liquid has been spilled, objects have fallen inside, the
device has been exposed to rain or moisture, does not operate
properly or has been dropped.
· WARNING: To reduce the risk of fire or electric shock, do not
use the device near water and do not expose it to rain or mois-
ture. Do not place objects filled with liquids, such as vases or
coffee cups, on the device.
· Only use the NT 3-1 table top power supply (see "Accesso-
ries" on page 15).
· Do not block any ventilation openings. Install the device in
accordance with the instructions given in this manual.
· Do not install the device near any heat sources.
· Only use attachments/accessories specified by Sennheiser.
Replacement parts
When replacement parts are required, be sure the service tech-
nician uses replacement parts specified by Sennheiser or those
having the same characteristics as the original part. Unauthor-
ized substitutions may result in fire, electric shock, or other
hazards.
Safety check
Upon completion of any service or repairs to this device, ask the
service technician to perform safety checks to determine that
the device is in a safe operating condition.
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3
Important safety instructions
Intended use of the device
Intended use of the AC 3 includes:
· having read and understood this instruction manual espe-
cially the chapter "Important safety instructions" on page 2,
· using the device within the operating conditions and limita-
tions described in this instruction manual.
"Improper use" means using the AC 3 other than as described
in this instruction manual, or under operating conditions which
differ from those described herein.
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4
The AC 3 active transmitter combiner
The AC 3 active transmitter
combiner
With the AC 3 4-to-1 active transmitter combiner, the signals of
up to four SR 300 IEM G3 type transmitters can be combined
onto a single antenna.
The integral active RF amplifiers ensure that the input signals
are combined onto the common antenna output with no distri-
bution attenuation.
The AC 3 incorporates DC distribution to enable simultaneous
powering of up to four transmitters via its BNC sockets. A single
NT 3-1 table top power supply (see "Accessories" on page 15)
is required to power the AC 3 and the connected transmitters.
Using the GA 3 rack adapter (see "Accessories" on page 15),
one AC 3 and one stationary SR 300 IEM G3 type transmitter
can be mounted into a 19" rack.
Alternatively, you can stack the AC 3. For stacking the AC 3,
mount the optional stacking elements (see "Accessories" on
page 15).
The AC 3 is suitable for the following areas of application:
· Multi-channel monitoring systems for stage use
· Multi-channel systems suitable for any application where
talk-back signals are to be transmitted (e.g. studio)
Delivery includes
1 AC 3 active transmitter combiner
1 set of device feet
4BNC cables
1 instruction manual
You additionally require the NT 3-1 table top power supply with
a suitable mains connector (see "Accessories" on page 15).
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