Sennheiser Car Satellite Radio System AC 3000 User Guide

Active Transmitter Combiner 8:1  
AC 3000  
Bedienungsanleitung  
Instructions for use  
Notice d‘emploi  
Istruzioni per luso  
Instrucciones para el uso  
Gebruiksaanwijzing  
 
Active Transmitter Combiner 8:1  
AC 3000  
Instructions for use  
13  
 
   
Contents  
Delivery includes ..................................................................... 17  
Operating elements ................................................................ 17  
Connection diagram ............................................................... 18  
Putting the unit into operation ............................................ 18  
Operation .................................................................................. 20  
Troubleshooting ...................................................................... 20  
Accessories ............................................................................... 21  
Specifications ........................................................................... 21  
Garantee ................................................................................... 22  
Brief description  
With the AC 3000 8-to-1 active transmitter combiner, the  
signals of up to eight SR3054 transmitters or up to four  
SR 3056 twin transmitters can be combined onto a single  
antenna (A 2003 UHF directional antenna or A 1031 U  
omni-directional antenna).  
The active transmitter combiner allows you to make high-  
quality transmission systems with up to 8 channels.  
Areas of application:  
y Multi-channel in ear monitoring system for broadcast or  
stage use  
y Multi-channel system suitable for any application where  
talk-back signals are to be transmitted (e.g. studio)  
14  
 
Safety instructions  
Danger!  
Overheating or overvoltages (caused by lightning striking  
the mains supply etc.) can cause units with a mains connec-  
tion to catch fire!  
Always set up the unit in a well-ventilated place! Make sure  
that the air vents of the unit are not covered or blocked!  
Never stack more than two units directly one above the  
other! Do not set up the unit near any heat sources and  
never expose the unit to direct sunlight (see page 15)! Use  
an overvoltage protection or, during a thunderstorm, dis-  
connect the unit from the mains!  
The AC 3000 contains mechanically moving parts (fans).  
Since dust and pollution can impair their function, you  
should regularly check the fans for proper operation and  
clean out any dust if necessary. The failure of one or several  
fans can cause overheating and permanent damage to the  
unit.  
Warning!  
If you open units or use damaged mains cables, you can  
receive a dangerous electric shock!  
Never open the unit and only use undamaged mains cables!  
If a unit should be defective, repair must be carried out by  
authorized personnel! If units are opened by you in breach  
of this instruction, the warranty becomes null and void.  
Warning!  
If units and cables are set up improperly, persons can be  
injured or units can be damaged!  
Set up the unit on an even surface or mount it into a rack!  
Lay the cables in such a way that no-one can stumble over  
them!  
15  
 
 
Attention!  
If liquids or small parts which conduct electricity find their  
way into the interior or to the sockets of the unit, this can  
cause a short-circuit which may damage the unit!  
Keep liquids and small parts which conduct electricity away  
from the unit! Use a damp cloth for cleaning the unit. Do not  
use any solvents or cleansing agents!  
16  
 
Delivery includes  
y 1 active transmitter combiner 8:1  
y 1 mains cable  
y 1 rack-mounting kit  
y 4 set of self-adhesive plastic feet  
y 1 instruction manual  
You additionally require BNC cables for connecting the  
transmitters and the antenna to the AC 3000, an antenna  
(A 2003 UHF passive directional antenna or A 1031 U pas-  
sive omni-directional antenna) and up to eight SR 3054  
transmitters or up to four SR 3056 twin transmitters.  
Operating elements  
³ ᕢ  
8
³ POWER LED  
· POWER (ON/ OFF) switch  
» 8 RF inputs RF IN 1 to RF IN 8 for connecting the  
transmitters  
¿ 3 low-noise fans  
´ BNC socket for antenna output ANT  
² IEC mains socket  
8 LEDs for RF signal indication  
17  
 
   
Connection diagram  
The below connection diagram shows the connections for  
an 8-channel system.  
ANT  
8:1  
Putting the unit into operation  
Setting up the unit  
̈ Set up the AC 3000 on an even, horizontal surface so that  
it cannot fall over or mount it into a 19" rack.  
Warning!  
During operation, the AC 3000 and the connected  
transmitters produce considerable waste heat! Make  
sure that the air vents of the units are not covered or  
blocked and provide for a duct of sufficient size to ensure  
a free air flow between the units – especially when  
mounting several transmitter combiners or transmitters  
into a desk, chassis or rack! Never stack more than two  
units directly one above the other!  
18  
 
   
Connecting the antenna  
The AC 3000 active transmitter combiner can be used with  
either the A 2003 UHF directional antenna or the A 1031 U  
omni-directional antenna. The antenna transmits the sig-  
nals of all connected transmitters. The signals are combined  
onto the antenna output with no distribution attenuation.  
̈ Connect the antenna to the antenna output ANT ´.  
Note:  
Each AC 3000 requires its own antenna! Several  
AC 3000s cannot be daisy-chained!  
´
Connecting the transmitters  
You can connect up to eight SR 3054 transmitters or up to  
four SR 3056 twin transmitters to the AC 3000.  
̈ Use BNC cables to connect the transmitters to the RF  
inputs RF IN 1 to RF IN 8 ».  
Connecting the mains cable  
̈ Connect the mains cable to the IEC mains socket and  
to the mains.  
Note:  
8
The AC 3000 can be connected to any mains power  
supply with 100 V to 240 V AC (50 to 60 Hz).  
19  
 
Operation  
Turning the AC 3000 on and off  
̈ To turn the AC 3000 on, press the POWER (ON/ OFF)  
switch ·.  
³ ᕢ  
The POWER LED ³ lights up red.  
̈ To turn the AC 3000 off, press the POWER (ON/ OFF)  
switch · once more. The POWER LED ³ goes off.  
RF signal indication  
̈ The AC 3000 features eight control LEDs which will  
light up if an input signal is present at the corresponding  
input.  
Troubleshooting  
One or several LEDs for input signal indication do not  
light up  
̈ Check if transmitters are connected to the corresponding  
inputs.  
̈ Check if the corresponding transmitters are turned on.  
Disturbed reception or no reception  
Possible causes:  
y Transmitting antennas are not within the reception area  
y Transmitters or receivers are not turned on  
y Batteries are not inserted into the receiver or batteries  
are low  
y The antennas are not connected correctly  
y The connecting cables are defective  
y Too high cable attenuation due to too long antenna  
cables or wrong type of antenna cable  
y The selected transmission and receiving frequencies are  
not within the frequency window  
20  
 
   
Accessories  
The following accessories are available from Sennheiser:  
A 2003 UHF Passive directional antenna Cat. No. 03658  
A 1031 U Passive omni-directional antenna  
Cat. No. 04645  
GZL 1019 A1 BNC-BNC coaxial cable, length 1 m  
Cat. No. 02324  
GZL 1019 A5 BNC-BNC coaxial cable, length 5 m  
Cat. No. 02325  
GZL 1019 A10 BNC-BNC coaxial cable, length 10 m  
Cat. No. 023266  
Specifications  
Antenna combiner  
Frequency range  
8-to-1  
470 – 870 MHz  
Distribution attenuation 0 dB (±1 dB)  
RF input power  
Impedance  
max. 100 mW per input  
50  
Power supply  
Current consumption  
Temperature range  
Weight  
100 V – 240 V AC, 50 – 60 Hz  
max. 120 VA  
–10 °C to +55°C  
3 kg  
21  
 
   
Garantee  
The guarantee period for this Sennheiser product is 24 months  
from the date of purchase. Excluded are accessory items, recharge-  
able or disposable batteries that are delivered with the product;  
due to their characteristics these products have a shorter service  
life that is principally dependent on the individual frequency of use.  
The guarantee period starts from the date of original purchase. For  
this reason, we recommend that the sales receipt be retained as  
proof of purchase. Without this proof (which is checked by the  
responsible Sennheiser service partner) you will not be reimbursed  
for any repairs that are carried out.  
Depending on our choice, guarantee service comprises, free of  
charge, the removal of material and manufacturing defects through  
repair or replacement of either individual parts or the entire device.  
Inappropriate usage (e.g. operating faults, mechanical damages,  
incorrect operating voltage), wear and tear, force majeure and  
defects which were known at the time of purchase are excluded  
from guarantee claims. The guarantee is void if the product is mani-  
pulated by non-authorised persons or repair stations.  
In the case of a claim under the terms of this guarantee, send the  
device, including accessories and sales receipt, to the responsible  
service partner. To minimise the risk of transport damage, we  
recommend that the original packaging is used. Your legal rights  
against the seller, resulting from the contract of sale, are not affec-  
ted by this guarantee.  
The guarantee can be claimed in all countries outside the U.S. pro-  
vided that no national law limits our terms of guarantee.  
22  
 
Sennheiser electronic GmbH & Co. KG  
30900 Wedemark, Germany  
Phone +49 (5130) 600 0  
Fax +49 (5130) 600 300  
Printed in Germany  
Publ. 10/ 04  
93908 / A02  
 

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