Sennheiser AC 3200-II High Gain User manual

AC 3200-II
Active Transmitter Combiner 8:1
Instruction manual

Contents
AC 3200-II | 1
Contents
Important safety instructions ......................................................................................... 2
The AC 3200-II active transmitter combiner 8:1 ........................................................... 4
Delivery includes ................................................................................................................ 4
Connection diagram .......................................................................................................... 5
Product overview ............................................................................................................... 6
Putting the AC 3200-II into operation ............................................................................ 7
Preparing the AC 3200-II for use ....................................................................................... 7
Connecting devices ............................................................................................................... 9
Connecting a transmitter to the AC 3200-II .................................................................. 10
Connecting the mains unit ................................................................................................ 10
Switching the AC 3200-II on and off ............................................................................... 11
Recommendations and tips for optimum transmission ............................................ 11
Cleaning and maintaining the AC 3200-II .................................................................... 12
If a problem occurs ... ...................................................................................................... 12
Specifications ................................................................................................................... 14
Manufacturer Declarations ............................................................................................. 15

Important safety instructions
2 | AC 3200-II
Important safety instructions
1. Read these instructions.
2. Keep these instructions. Always include these instructions when passing the
device on to third parties.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use the device near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with these
instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or
other devices (including amplifiers) that produce heat.
9. The device should be operated only from the type of power source indicated in the
chapter “Specifications” (see page 14) and on the mains unit. The device must
only be connected to properly grounded power outlets.
10. Protect the mains cable from being walked on or pinched, particularly at plugs,
convenience receptacles, and the point where it exits from the device.
11. Only use attachments/accessories specified by Sennheiser.
12. Use only with the cart, stand, tripod, bracket, or table specified by the
manufacturer, or sold with the device.
When a cart is used, use caution when moving the cart/apparatus
combination to avoid injury from tip-over.
13. Unplug the device during lightning storms or when unused for long periods of
time.
14. Refer all servicing to qualified service personnel. Servicing is required if the device
has been damaged in any way, such as mains cable or plug damage, 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.
15. To completely disconnect the device from the AC mains, disconnect the mains plug
from the AC receptacle.

Important safety instructions
AC 3200-II | 3
16. WARNING: To reduce the risk of fire or electric shock, do not expose the
device to rain or moisture.
17. Do not expose the device to dripping or splashing and ensure that no
objects filled with liquids, such as vases or coffee cups, are placed on the device.
18. The plug of the mains cable shall remain readily accessible.
Intended use
Intended use of the AC 3200-II includes:
• using the device for professional purposes,
• having read this instruction manual especially the chapter “Important safety
instructions” on page 2,
• using the device within the operating conditions and limitations described in this
instruction manual.
“Improper use” means using the device other than as described in this instruction
manual, or under operating conditions which differ from those described herein.
This instruction manual is also available on the Internet at www.sennheiser.com.
www Manual

The AC 3200-II active transmitter combiner 8:1
4 | AC 3200-II
The AC 3200-II active transmitter combiner 8:1
With the AC 3200-II active transmitter combiner, the signals of up to eight Sennheiser
wireless monitoring transmitters can be combined onto a single antenna, 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 transmitters, 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 systems
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 3200-II active transmitter combiner 8:1
1 NT12-125D mains unit
3 mains cables (EU/UK/US)
4 self-adhesive device feet
1 instruction manual

Connection diagram
AC 3200-II | 5
Connection diagram
The below connection diagram shows the connections for an 8-channel system with a
single antenna.
Rack-mount transmitters
AC 3200-II
ANT
RF OUTPUT
RF OUTPUTS
RF INPUTS

Product overview
6 | AC 3200-II
Product overview
1Rack mount “ears”
2Air vents (on the sides)
38 LEDs: operation indicators of the RF inputs
4LED
5On/off switch
6DC input socket for connecting the NT 12-125D mains unit
78 RF inputs RF IN 1 to RF IN 8 for connecting the transmitters
8BNC socket for antenna output ANT
ACTIVE TRANSMITTER COMBINER
AC 3200-II
23452
11
77
8776

Putting the AC 3200-II into operation
AC 3200-II | 7
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
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.
왘Ensure that the base of the AC 3200-II is clean and free from grease before fitting
the rubber feet.
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:
왘Make sure that the air vents 2on 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.
왘Regularly clean the air vents on the sides of the AC 3200-II with a soft brush.
왘In order to avoid heat accumulation, make sure to install the AC 3200-II as the
uppermost device.
왘Never stack more than two devices directly one above the other.
왘Never place several NT 12-125D mains units directly next to one another.
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 possibility of staining.
왘Do not place the AC 3200-II on delicate surfaces.

Putting the AC 3200-II into operation
8 | AC 3200-II
왘Fix 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.
왘Place the AC 3200-II on an even, horizontal
surface.
Rack-mounting
To mount the AC 3200-II into a 19’’ rack:
왘Slide the AC 3200-II into the 19’’ rack.
왘Secure the rack mount “ears” 1to the rack using four screws (to be ordered
separately).
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:
왘The ambient temperature within the rack must not exceed the
temperature limit specified in the AC 3200-II specifications.
왘When installing the device in a rack, take good care not to affect the
ventilation required for safe operation. If necessary, provide additional
ventilation.
왘In order to avoid heat accumulation, make sure to install the AC 3200-II as
the uppermost device in the rack.
왘Provide for a duct or vent space of 1 U above the AC 3200-II to ensure that
the heated air can dissipate.
왘Never place several NT 12-125D mains units directly next to one another.
왘Make sure the mechanical loading of the rack is even to avoid a hazardous
condition such as a severely unbalanced rack.
왘Make sure the two cables of the NT 12-125D mains unit are not exposed
to mechanical loading (e.g. pulling).
왘When connecting the device to the power supply, observe the information
indicated on the mains unit. Avoid circuit overloading. If necessary, provide
overcurrent protection.
왘Ensure a reliable mains ground connection of the device by taking
appropriate measures – especially when you are using multi-outlet power
strips or extension cables.

Putting the AC 3200-II into operation
AC 3200-II | 9
Connecting devices
Connecting the antenna
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 (see page 11).
The signals are combined onto the antenna output with no distribution attenuation.
To connect an antenna:
왘Connect the antenna using a low-attenuation 50-Ωcoaxial cable.
왘Connect the coaxial cable to the antenna output 8.
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.
왘Never connect the AC 3200-II to other active combiners.
왘Only connect suitable antennas to the output of the AC 3200-II.
8