Sennheiser AC 3200-II High Gain User manual

AC 3200-II
AC 3200-II High Gain
Instruction manual

AC 3200-II | 17
Contents
Contents
Important safety instructions ����������������������������������������������������������������������������������� 18
Active Transmitter Combiner 8:1 AC 3200-II ����������������������������������������������������� 19
Delivery includes ��������������������������������������������������������������������������������������������������������20
Connection diagram ���������������������������������������������������������������������������������������������20
Product overview ������������������������������������������������������������������������������������������������������� 21
Putting the AC 3200-II into operation ���������������������������������������������������������������������22
Preparing the AC 3200-II for use�������������������������������������������������������������������������22
Connecting devices ���������������������������������������������������������������������������������������������������24
Connecting the antenna ���������������������������������������������������������������������������������������24
Connecting a transmitter to the AC 3200-II ������������������������������������������������������25
Connecting the mains unit �����������������������������������������������������������������������������������25
Switching the AC 3200-II on and off �����������������������������������������������������������������������26
Recommendations and tips for optimum transmission �����������������������������������26
Cleaning and maintaining the AC 3200-II ���������������������������������������������������������������27
If a problem occurs �����������������������������������������������������������������������������������������������27
Specifications �������������������������������������������������������������������������������������������������������������29
Manufacturer declarations �������������������������������������������������������������������������������������� 30

18 | AC 3200-II
Important safety instructions
Important safety instructions
1� Read these safety instructions and the instruction manual of the product�
2� Keep these safety instructions and the instruction manual of the product�
Always include all instructions when passing the product on to third parties�
3� Heed all warnings�
4� Follow all instructions�
5� Do not use this apparatus near water�
6� Only clean the product when it is not connected to the power supply sys-
tem� Clean only with a dry cloth�
7� Do not block any ventilation openings� Install in accordance with the manu-
facturer‘s instructions�
8� Do not install near any heat sources such as radiators, heat registers,
stoves, or other apparatus (including amplifiers) that produce heat�
9� Only operate the product from the type of power source specified in the
chapter „Specifications“ and indicated on the power supply unit�
10� Protect the power cord from being walked on or pinched, particularly at
plugs and convenience receptacles�
11� Only use attachments/accessories specified by the manufacturer�
12� Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the apparatus� When a cart is used, use caution
when moving the cart/apparatus combination to avoid injury from tip-over�
13� Unplug the power supply unit from the wall socket,
• to completely disconnect the product from the power supply system,
• during lightning storms,
• when not using the product for long periods of time�
14� Refer all servicing to qualified service personnel� Servicing is required when
the apparatus has been damaged in any way, such as power-supply cord
or plug is damaged, liquid has been spilled or objects have fallen into the
apparatus, when the apparatus has been exposed to rain or moisture, does
not operate normally, or has been dropped�
15� Only use the supplied power supply unit�
16� Warning: To reduce the risk of fire or electric shock, do not expose this
apparatus to rain or moisture and objects filled with liquids, such as vases,
should not be placed on this apparatus�
17� When using the supplied device feet, do not place the product on delicate
surfaces� Delicate surfaces can become discolored or stained when they
come into contact with the plastic of the device feet�

AC 3200-II | 19
Important safety instructions
18� Always ensure that the power supply unit is
• in a safe operating condition and easily accessible,
• properly plugged into the wall socket,
• only operated within the permissible temperature range,
• not covered or exposed to direct sunlight for longer periods of time in order
to prevent heat accumulation�
Intended use
• The product is designed for indoor use�
• The product can be used for commercial purposes�
• It is considered improper use when the product is used for any application
not named in the corresponding instruction manual�
• Sennheiser does not accept liability for damage arising from improper use
or misuse of this product and its attachments/accessories�
• Before putting the products into operation, please observe the respective
country-specific regulations!
• Sennheiser is not liable for damages resulting from the loss of connection
due to flat or overaged (rechargeable) batteries or exceeding the transmis-
sion range�
• Sennheiser does not accept liability for damage arising from abuse or mis-
use of this product and its attachments/accessories�
Active Transmitter Combiner 8:1 AC 3200-II
With the AC 3200-II active transmitter combiner, the signals of up to eight
Sennheiser wireless monitoring transmitters can be combined onto a single an-
tenna, e�g� the A 2003 UHF directional antenna, the A 1031 U omni-directional
antenna or the A 5000 CP circularly polarized UHF antenna� For suitable trans-
mitters, please refer to the AC 3200-II product page at www�sennheiser�com�
The AC 3200-II allows you to make high-quality 8-channel transmission sys-
tems 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)�

20 | AC 3200-II
Delivery includes
Delivery includes
1 AC 3200-II active transmitter combiner 8:1
1 NT 12-125D mains unit
3 mains cables (EU/UK/US)
4 self-adhesive device feet
1 instruction manual
Connection diagram
The below connection diagram shows the connections for an 8-channel system
with a single antenna�
AC 3200-II
ANT
RF OUTPUT
RF OUTPUTS
RF INPUTS
Rack-mount transmitters

AC 3200-II | 21
Product overview
Product overview
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1 Rack mount “ears”
2 Air vents (on the sides)
3 8 LEDs: operation indicators of the RF inputs
4 LED
5 On-/Off switch
6 DC input socket for connecting the NT 12-125D mains unit
7 8 RF inputs RF IN 1 to RF IN 8 for connecting the transmitters
8 BNC socket for antenna output ANT

22 | AC 3200-II
Putting the AC 3200-II into operation
Putting the AC 3200-II into operation
Preparing the AC 3200-II for use
You can set up the AC 3200-II on an even surface or mount it into a rack�
Setting up the device
CAUTION
DANGER OF HEAT DAMAGE TO THE DEVICES
During operation, the AC 3200-II and the connected transmitters produce
considerable waste heat� If this heat cannot dissipate, it can cause damage to
the devices�
The devices are equipped with fans to assist dissipation of generated heat:
Make sure that the air vents 2 on the sides of the AC 3200-II are not covered
or blocked and provide ducts of sufficient size or allow sufficient space to
ensure a free air flow between the devices�
Regularly clean the air vents on the sides of the AC 3200-II with a soft brush�
In order to avoid heat accumulation, make sure to install the AC 3200-II as
the uppermost device�
Never stack more than two devices directly one above the other�
Never place several NT 12-125D mains units directly next to or on top of one
another�
To ensure that the AC 3200-II cannot slip on the surface on which it is placed,
four self-adhesive soft rubber feet are supplied�
CAUTION
RISK OF STAINING OF SURFACES
Some surfaces have been treated with varnish, polish or synthetics which
might cause stains when they come into contact with other synthetics� Despite
a thorough testing of the synthetics used by us, we cannot rule out the possi-
bility of staining�
Do not place the AC 3200-II on delicate surfaces�

AC 3200-II | 23
Putting the AC 3200-II into operation
Ensure that the base of the AC 3200-II is clean and free from grease before
fitting the rubber feet�
Fix the rubber feet to the base of
the AC 3200-II by peeling off the
backing paper and fitting them as
shown in the diagram on the right�
Place the AC 3200-II on an even,
horizontal surface�
Rack-mounting
CAUTION
RISKS WHEN RACK MOUNTING THE AC 3200-II
When installing the device in a closed or multi-rack assembly, please consider
that, during operation, the ambient temperature, the mechanical loading and
the electrical potentials will be different from those of devices which are not
mounted into a rack:
The ambient temperature within the rack must not exceed the temperature
limit specified in the AC 3200-II specifications�
When installing the device in a rack, take good care not to affect the ventila-
tion required for safe operation� If necessary, provide additional ventilation�
In order to avoid heat accumulation, make sure to install the AC 3200-II as
the uppermost device in the rack�
Provide for a duct or vent space of 1 U above the AC 3200-II to ensure that
the heated air can dissipate�
Never place several NT 12-125D mains units directly next to or on top of one
another�
Make sure the mechanical loading of the rack is even to avoid a hazardous
condition such as a severely unbalanced rack�
Make sure the two cables of the NT 12-125D mains unit are not exposed to
mechanical loading (e�g� pulling)�
When connecting the device to the power supply, observe the information
indicated on the mains unit� Avoid circuit overloading� If necessary, provide
overcurrent protection�
Ensure a reliable mains ground connection of the device by taking appropri-
ate measures – especially when you are using multi-outlet power strips or
extension cables�

24 | AC 3200-II
Connecting devices
To mount the AC 3200-II into a 19" rack:
Slide the AC 3200-II into the 19" rack�
Secure the rack mount “ears” 1 to the rack using four screws (to be ordered
separately)�
Connecting devices
Connecting the antenna
CAUTION
DANGER OF DAMAGE TO THE DEVICES!
Do not daisy-chain several AC 3200-II� Do not connect other active combiners
to the AC 3200-II�
Never connect the AC 3200-II to other active combiners�
Only connect suitable antennas to the output of the AC 3200-II�
The AC 3200-II active transmitter combiner can be used with either the
A 2003 UHF directional antenna, the A 1031 U omni-directional antenna or the
A 5000 CP circularly polarized UHF antenna� The antenna transmits the signals
of all connected transmitters�
The signals are combined onto the antenna output with no distribution attenu-
ation�
To connect an antenna:
Connect the antenna using a low-attenuation 50-Ω-coaxial cable�
Connect the coaxial cable to the antenna output 8�
8

AC 3200-II | 25
Connecting devices
Connecting a transmitter to the AC 3200-II
To connect a transmitter:
Connect the BNC cable of the transmitter to one of the eight RF inputs
RF IN 1 to RF IN 8 7�
77 77
Connecting the mains unit
Connect the mains cable (EU, UK or US version, depending on your location)
to the input socket on the NT 12-125D mains unit�
Connect the DC connector of the mains unit to the DC input socket 6 of the
AC 3200-II�
Connect the mains connector of the mains cable to the mains power supply�
UK
EU
US
6
NT 12-125D

26 | AC 3200-II
Switching the AC 3200-II on and off
Switching the AC 3200-II on and off
Press the on/off switch 5�
The AC 3200-II switches on and the LED 4 lights up red�
Press the on/off switch 5
again�
The AC 3200-II switches off and
the LED 4 goes off�
34
5
After switch-off, the AC 3200-II is in standby mode� To disconnect
the device and the NT 12-125D mains unit from the mains power
supply, pull out the mains connector from the wall socket�
RF indicators
The AC 3200-II has 8 control LEDs 3 which light up green on the channels
where transmission power is available�
Recommendations and tips for optimum trans-
mission
• There should be a “free line of sight” between transmitting and receiving
antennas�
• To avoid overloading the receiver, observe a minimum distance of 5 m be-
tween transmitting and receiving antennas�
• Observe a minimum distance of 50 cm between the transmitting antenna
and metal objects (such as cross members or reinforced-concrete walls)�
• When using a multi-channel system:
Set all transmitters of your multi-channel system to intermodulation-free fre-
quencies�

AC 3200-II | 27
Cleaning and maintaining the AC 3200-II
Cleaning and maintaining the AC 3200-II
CAUTION
LIQUIDS CAN DAMAGE THE ELECTRONICS OF THE DEVICE
Liquids entering the housing of the device can cause a short-circuit and dam-
age the electronics�
Keep all liquids away from the device�
Do not use any solvents or cleansing agents�
Before cleaning, disconnect the NT 12-125D mains unit from the mains power
supply�
Only use a dry cloth to clean the device�
Regularly check the air vents for dust deposits� If necessary, remove the dust
with a soft brush�
If a problem occurs
Problem Possible cause Solution
The LED 4 does
not light up�
The AC 3200-II
doesn’t consume
current�
Check if the AC 3200-II is
connected to the NT 12-125D
mains unit, if the mains unit is
connected to the mains power
supply and if the on/off switch
5 is pressed�
Extra LEDs 3 light
up for RF inputs
which are not in
use�
The transmitting an-
tenna or the antenna
cable is not connect-
ed, of the wrong type,
damaged or faulty�
Check that the transmitting
antenna or the antenna cable
is correctly connected, of the
correct type, and is not dam-
aged or faulty�
Check that the transmitting
antenna or the antenna cable
is connected to the antenna
output 8 and that all trans-
mitters are connected to RF
inputs 7�
One or several LEDs
3 do not light up�
A transmitter is con-
nected to the corre-
sponding input but
the transmitter
is not switched on�
Switch the transmitter on�

28 | AC 3200-II
Cleaning and maintaining the AC 3200-II
Problem Possible cause Solution
Disturbed reception
or no reception
The transmitting
antenna is not within
the reception area�
Reduce the distance between
transmitter and receiver�
The receiver batteries
are not inserted or
batteries are low�
Replace the receiver batteries�
The antenna is not
connected correctly�Check if the antenna is con- nected correctly�
Too high cable atten-
uation due to too long
antenna cables
Use a shorter antenna cable
or the correct type of antenna
cable�
or wrong type of
antenna cable�Use low-attenuation 50-Ω-coaxial cable�
Interference or inter-
modulation during
multi-channel
operation�
Set all transmitters of your
multi-channel system to inter-
modulation-free frequencies�
If a problem occurs that is not listed in the above table or if the problem cannot
be solved with the proposed solutions, please contact your local Sennheiser
partner for assistance�
To find a Sennheiser partner in your country, search at www�sennheiser�com
under “Service & Support”�

AC 3200-II | 29
Specifications
Specifications
AC 3200-II AC 3200-II High Gain
Frequency range 500 to 870 MHz
Distribution attenuation 0 dB (±1 dB) +3 dB (±1 dB)
RF input power max� 100 mW
Inputs protected up to max� 250 mW
Impedance 50 Ω
Power supply 12 V ⎓
Current consumption max� 7�5 A
Power consumption max� 90 W
Temperature range –10 °C to +45 °C
Weight approx� 4 kg
Dimensions 436 x 215 x 44 mm
NT 12-125D
Type Mean Well GST160A12
Input voltage 100 to 240 V §
Input frequency 50 to 60 Hz
Current consumption max� 1�85 A
Output voltage 12 V ⎓
Output current max� 11�5 A
Temperature range - 30°C to +50 °C
Relative air humidity 20 - 90%
Weight approx� 660 g (without mains cable)
Dimensions 175 x 72 x 35 mm
Length of DC output cable approx� 100 cm/39 inch

30 | AC 3200-II
Manufacturer declarations
Manufacturer declarations
Warranty
Sennheiser electronic GmbH & Co� KG gives a warranty of 24 months on these
products�
For the current warranty conditions, please visit our website at
www�sennheiser�com or contact your Sennheiser partner�
In compliance with the following requirements
• WEEE Directive (2012/19/EU)
Notes on disposal
The symbol of the crossed-out wheeled bin (imprint available depending on
national requirements) on the product, the battery/rechargeable battery (if ap-
plicable) and/or the packaging indicates that these products must be disposed
of separately at the end of their operational lifetime in accordance with the na-
tional legislation� For packaging disposal, please observe the legal regulations
on waste segregation applicable in your country�
The separate collection of waste electrical and electronic equipment, batter-
ies/rechargeable batteries (if applicable) and packagings is used to promote
the reuse and recycling and to prevent negative effects caused by e�g� poten-
tially hazardous substances contained in these products� Herewith you make
an important contribution to the protection of the environment and public
health�
EU Declaration of conformity
• RoHS Directive (2011/65/EU)
Hereby, Sennheiser electronic GmbH & Co� KG declares that the radio equip-
ment type (accessory) AC 3200-II, AC 3200-II High Gain is in compliance with
Directive 2014/53/EU�
The full text of the EU declaration of conformity is available at the following
internet address: www�sennheiser�com/download�

Sennheiser electronic GmbH & Co. KG
Am Labor 1, 30900 Wedemark, Germany, www.sennheiser.com
Printed in Germany, Publ. 08/19, 538976/A05