Sennheiser Stereo Receiver AC 3200 User Manual

Active Transmitter Combiner 8:1  
AC 3200  
Instruction manual  
 
Contents  
Contents  
Important safety instructions ..................................................... 2  
The AC 3200 active transmitter combiner 8:1 ......................... 5  
Delivery includes ............................................................................. 5  
Connection diagram ....................................................................... 6  
Product overview ............................................................................ 7  
Putting the AC 3200 into operation ........................................... 8  
Cleaning the AC 3200 ................................................................... 12  
If a problem occurs ... ................................................................... 13  
Accessories and spare parts ....................................................... 14  
Specifications ................................................................................. 15  
Manufacturer Declarations ......................................................... 16  
1
 
Important safety instructions  
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 on  
the mains plug. 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.  
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 operable and easily accessible.  
2
 
 
Important safety instructions  
Hazard warnings on the rear of the  
AC 3200 active transmitter combiner 8:1  
The label shown on the left is attached to the rear of the  
AC 3200. The symbols on this label have the following meaning:  
This symbol is intended to alert the user to the presence of  
uninsulated dangerous voltage within the AC 3200’s enclosure  
that may be of sufficient magnitude to constitute risk of fire or  
electric shock.  
This symbol is intended to alert the user to the risk of electric  
shock if the AC 3200 is opened. There are no user serviceable  
parts inside. Refer servicing to qualified personnel only.  
This symbol is intended to alert the user to the presence of  
important operating and maintenance instructions in the  
literature accompanying this AC 3200.  
Overloading  
Do not overload wall outlets and extension cables as this may  
result in fire and electric shock.  
Replacement parts  
When replacement parts are required, be sure the service  
technician has used replacement parts specified by Sennheiser  
or those having the same characteristics as the original part.  
Unauthorized 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.  
3
 
Important safety instructions  
Intended use of the device  
Intended use of the AC 3200 includes:  
y using the device for professional purposes,  
y having read this instruction manual especially the chapter  
y 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.  
4
 
The AC 3200 active transmitter combiner 8:1  
The AC 3200 active transmitter  
combiner 8:1  
With the AC 3200 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 product page at  
The AC 3200 allows you to make high-quality 8-channel  
transmission systems suitable for the following areas of  
application:  
y Multi-channel monitoring systems for stage use  
y Multi-channel systems suitable for any application where  
talk-back signals are to be transmitted (e.g. studio)  
Delivery includes  
1
3
4
1
AC 3200 active transmitter combiner 8:1  
mains cable (EU/UK/US)  
self-adhesive device feet  
instruction manual  
5
 
   
Connection diagram  
Connection diagram  
The below connection diagram shows the connections for an  
8-channel system with a single antenna.  
AC 3200  
6
 
 
Product overview  
Product overview  
»
¿
·
´ ·  
³
70  
W
²
º
³ Rack mount “ears”  
· Air vents (on the sides)  
» 8 LEDs: operation indicators of the RF inputs  
¿ LED  
´ On/off switch  
² IEC mains socket  
8 RF inputs RF IN 1 to RF IN 8 for connecting the transmitters  
º BNC socket for antenna output ANT  
7
 
                 
Putting the AC 3200 into operation  
Putting the AC 3200 into  
operation  
Preparing the AC 3200 for use  
You can set up the AC 3200 on an even surface or mount it into  
a 19" rack.  
Setting up the device  
CAUTION! Danger of heat damage to the devices!  
During operation, the AC 3200 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 · on the sides of  
the AC 3200 are not covered or blocked and  
provide ducts of sufficient size or allow  
sufficient space to ensure a free air flow  
between the devices.  
̈ Regularily clean the air vents on the sides of  
the AC 3200 with a soft brush.  
̈ In order to avoid heat accumulation, make sure  
to install the AC 3200 as the uppermost device.  
̈ Never stack more than two devices directly one  
above the other!  
To ensure that the AC 3200 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  
possibility of staining.  
̈ Do not place the AC 3200 on delicate surfaces.  
8
 
   
Putting the AC 3200 into operation  
̈ Ensure that the base of the AC 3200 is clean and free from  
grease before fitting the rubber feet.  
̈ Fix the rubber feet to the base of the AC 3200 by peeling off  
the backing paper and fitting them as shown in the diagram  
on the left.  
̈ Place the AC 3200 on an even, horizontal surface.  
Rack-mounting  
CAUTION! Risks when rack mounting the AC 3200!  
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 specifications.  
̈ When installing the device in a rack, take good  
care not to affect the ventilation required for  
safe operation. If necessary, provide additional  
ventilation.  
̈ In order to avoid heat accumulation, make sure  
to install the AC 3200 as the uppermost device  
in the rack.  
̈ Provide for a duct or vent space of 1 U above  
the AC 3200 to ensure that the heated air can  
dissipate.  
̈ Make sure the mechanical loading of the rack is  
even to avoid a hazardous condition such as a  
severely unbalanced rack.  
̈ When connecting the device to the power  
supply, observe the information indicated on  
the type plate. Avoid circuit overloading. If  
necessary, provide overcurrent protection.  
̈ Ensure a reliable mains ground connection of  
the device by taking appropriate measures.  
̈ When installing the device in a closed or multi-  
rack assembly, please note that intrinsically  
harmless leakage currents of the individual  
devices may accumulate, thereby exceeding  
the allowable limit value. As a remedy, ground  
the rack via an additional ground connection.  
9
 
Putting the AC 3200 into operation  
To mount the AC 3200 into a 19" rack:  
̈ Slide the AC 3200 into the 19" rack.  
̈ Secure the rack mount “ears” ³ to the rack using four  
screws (not included).  
Connecting the antenna  
CAUTION! Danger of damage to the devices!  
Do not daisy-chain several AC 3200. Do not  
connect other active combiners to the AC 3200.  
̈ Never connect the AC 3200 to other active  
combiners.  
̈ Only connect suitable antennas to the output  
of the AC 3200!  
The AC 3200 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 12).  
The signals are combined onto the antenna output with no  
distribution attenuation.  
To connect an antenna:  
̈ Connect the antenna using a low-attenuation 50 Ω coaxial  
cable.  
̈ Connect the coaxial cable to the antenna output º.  
º
Connecting a transmitter to the AC 3200  
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 .  
10  
 
   
Putting the AC 3200 into operation  
70  
W
Connecting the mains cable  
̈ Connect the suitable mains cable to the IEC mains socket ²  
and to the mains.  
70  
W
Note:  
The AC 3200 can be connected to any mains power supply  
with 100 V to 240 V AC (50 to 60 Hz).  
Switching the AC 3200 on and off  
̈ Press the on/off switch  
The AC 3200 switches on and the LED  
´ again.  
´.  
»
¿
´
¿ lights up red.  
̈ Press the on/off switch  
The AC 3200 switches off and the LED  
¿ goes off.  
Note:  
After switch-off, the AC 3200 is in standby mode. To  
disconnect the device from the mains, pull out the mains  
connector from the wall socket.  
RF indicators  
The AC 3200 has eight control LED » which light up on the  
channels where transmission power is available.  
11  
 
   
Recommendations and tips for optimum reception  
Recommendations and tips  
for optimum reception  
y There should be a “free line of sight” between transmitting and receiving antennas.  
y To avoid overloading the receiver, observe a minimum distance of 5 m between  
transmitting and receiving antennas.  
y Observe a minimum distance of 50 cm between the transmitting antenna and metal  
objects (such as cross members or reinforced-concrete walls).  
y When using a multi-channel system:  
Set all transmitters of your multi-channel system to intermodulation-free  
frequencies.  
Cleaning the AC 3200  
Liquids can damage the electronics of the device!  
CAUTION!  
Liquids entering the housing of the device can cause a short-circuit  
and damage the electronics.  
̈ Keep all liquids away from the device.  
̈ Do not use any solvents or cleansing agents.  
̈ Before cleaning, disconnect the device from the mains.  
̈ Only use a slightly damp cloth to clean the device.  
̈ Regularily check the air vents for dust deposits. If necessary, remove the dust with  
a soft brush.  
12  
 
   
If a problem occurs ...  
If a problem occurs ...  
Problem  
Possible cause  
The AC 3200 doesn’t consume Check if the AC 3200 is  
current connected to the mains and  
Possible solution  
The LED  
not light up  
¿ does  
if the on/off switch  
pressed  
´ is  
Extra LEDs » light up The transmitting antenna  
Check that the transmitting  
antenna is correctly connected,  
is not damaged, and that the  
connecting cable is undamaged  
and is of the correct type.  
for RF inputs which  
are not in use  
is not connected, the  
transmitting antenna is  
faulty or the wrong type,  
the cable to the transmitting  
antenna is damaged, faulty,  
or of the wrong type  
Check that the transmitting  
antenna is connected to the  
antenna output º and that  
all transmitters are connected  
to RF inputs ¶  
One or several  
LEDs » do not light  
up  
A transmitter is connected to Switch the transmitter on  
the respective input but is  
switched off  
Disturbed reception  
or no reception  
The transmitting antenna is  
not within the reception area transmitter and receiver  
Reduce the distance between  
The receiver batteries are not Replace the receiver batteries  
inserted or batteries are low  
The antenna is not connected Check if the antenna is  
correctly  
connected correctly  
Too high cable attenuation due Use a shorter antenna cable or  
to too long antenna cables or the correct type of antenna  
wrong type of antenna cable  
cable  
Use low-attenuation 50 Ω  
coaxial cable  
Interference or  
intermodulation during  
multi-channel operation  
Set all transmitters of your  
multi-channel system to  
intermodulation-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 agent for assistance.  
13  
 
 
Accessories and spare parts  
Accessories and spare parts  
The following accessories are available from your Sennheiser  
partner:  
Cat. No. Accessory/spare part  
003658 A 2003 UHF passive directional antenna  
004645 A 1031 U passive omni-directional antenna  
500887 A 5000 CP circularly polarized UHF antenna  
002324 GZL 1019-A1 BNC-BNC coaxial cable, type RG 58, length 1 m  
14  
 
 
Specifications  
Specifications  
Frequency range  
Distribution attentuation  
RF input power  
500 – 870 MHz  
0 dB (±1 dB)  
nominal value  
up to 100 mW per input  
inputs protected up to max. 250 mW  
Impedance  
50 Ω  
Power supply  
100 V – 240 V AC, 50 – 60 Hz  
max. 70 W  
Power consumption  
Temperature range  
Weight  
0 °C to 45 °C  
approx. 4 kg  
Type approvals  
Area  
USA:  
Conformity  
FCC-Part 74.861  
FCC ID: DMOAC3200 / limited to 698 MHz!  
RSS-123  
IC: 2099A-AC3200  
Canada:  
EU:  
0682  
complies with the requirements for radio and  
EMC (R&TTE):  
• EN 300422-1/-2  
• EN 300454-1/-2  
• EN 301489-1/-9  
complies with the requirements for safety (LVD):  
• EN 60065  
15  
 
 
Manufacturer Declarations  
Manufacturer Declarations  
Warranty  
Sennheiser GmbH & Co. KG gives a warranty of 24 months on this product.  
your Sennheiser partner.  
CE Declaration of Conformity  
0682  
This equipment is in compliance with the essential requirements and other relevant provisions  
of Directives 1999/5/EC and 2006/95/EC. The declaration is available on the internet site at  
Before putting the equipment into operation, please observe the respective country-specific  
regulations!  
Statements regarding FCC and industry Canada  
This device complies with Part 15 of the FCC Rules and with RSS-210 of Industry Canada.  
Operation is subject to the following two conditions: (1) this device may not cause harmful  
interference, and (2) this device must accept any interference received, including interference  
that may cause undesired operation.  
This equipment has been tested and found to comply with the limits for a Class B digital device,  
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection  
against harmful interference in a residential installation. This equipment generates, uses and  
can radiate radio frequency energy and, if not installed and used in accordance with the  
instructions, may cause harmful interference to radio communications. However, there is no  
guarantee that interference will not occur in a particular installation. If this equipment does  
cause harmful interference to radio or television reception, which can be determined by turning  
the equipment off and on, the user is encouraged to try to correct the interference by one or  
more of the following measures:  
• Reorient or relocate the receiving antenna.  
• Increase the separation between the equipment and receiver.  
• Connect the equipment into an outlet on a circuit different from that to which the receiver is  
connected.  
• Consult the dealer or an experienced radio/TV technician for help.  
Changes or modifications made to this equipment not expressly approved by Sennheiser  
electronic Corp. may void the FCC authorization to operate this equipment. Before putting the  
device into operation, please observe the respective country-specific regulations!  
16  
 
 
 
Sennheiser electronic GmbH & Co. KG  
Am Labor 1, 30900 Wedemark, Germany  
Phone: +49 (5130) 600 0  
Fax: +49 (5130) 600 300  
Printed in Germany  
Publ.09/08  
528244/A01  
 

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