Sennheiser Log Splitter ASA 1 User Manual

Antenna Splitter  
ASA 1  
Instruction manual  
 
 
Contents  
Important safety instructions ........................................................ 2  
The ASA 1 active antenna splitter ................................................ 4  
Delivery includes ............................................................................... 4  
Operating elements ......................................................................... 5  
Putting the ASA 1 into operation .................................................. 7  
Preparing the ASA 1 for use ................................................................. 7  
Connecting devices to the ASA 1 and  
switching the ASA 1 on ....................................................................... 12  
Making an 8-channel system using the ASA 1 ............................... 14  
Cleaning the ASA 1 ......................................................................... 16  
If a problem occurs ... ..................................................................... 16  
Accessories and spare parts ......................................................... 17  
Specifications .................................................................................. 18  
Manufacturer Declarations ........................................................... 19  
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  
equipment 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.  
1
 
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.  
• 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  
moisture. Do not place objects filled with liquids, such as  
vases or coffee cups, on the device.  
• Only use the NT 1-1 mains unit.  
• 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  
technician uses 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.  
2
 
 
Important safety instructions  
Intended use of the device  
Intended use of the ASA 1 includes:  
• having read and understood this instruction manual  
• using the device within the operating conditions and  
limitations described in this instruction manual.  
“Improper use” means using the ASA 1 other than as described  
in this instruction manual, or under operating conditions which  
differ from those described herein.  
3
 
The ASA 1 active antenna splitter  
The ASA 1 active antenna splitter  
The ASA 1 active antenna splitter has been designed to enable  
routing of UHF antenna signals to several receivers in a multi-  
channel system. Up to four diversity receivers may be supplied  
with signal by only two antennas. The integral RF amplifiers  
ensure that the ASA 1 does not introduce any additional UHF  
signal loss.  
The ASA 1 incorporates DC distribution to enable simultaneous  
powering of up to four receivers and two antenna boosters via  
its BNC sockets. The antenna boosters may be required in order  
to compensate for cable losses due to long antenna cables.  
A single NT 1-1 mains unit (to be ordered separately) is  
required to power the ASA 1, the connected receivers and  
antenna boosters.  
By linking two ASA 1, an 8-channel diversity system can be  
operated with only two antennas.  
Using the GA 3 rack adapter, two ASA 1 or one ASA 1 and one  
stationary receiver (e.g. EM 100 G3, EM 300 G3 or EM 500 G3)  
can be mounted into a 19” rack.  
The ASA 1 is suitable for the following areas of application:  
• Multi-channel RF installations  
• Permanent installations in small conference centres and  
similar venues  
Delivery includes  
1 ASA 1 antenna splitter  
1 set of device feet  
8 BNC cables  
1 instruction manual  
You additionally require the NT 1-1 mains unit with a suitable  
4
 
Operating elements  
Operating elements  
³
·
¾
º ¶  
²
´ ¿ »  
³ On/Off button  
· Operation indicator  
» Cable grip for cable of mains unit  
¿ DC IN socket  
for connection of NT 1-1 mains unit  
´ BNC socket RF OUT A  
RF output only for connection of an additional ASA 1  
(to create a 1-to-8 diversity splitter)  
² Four BNC sockets A1 to A4  
RF outputs of diversity section A for connection of  
the receivers  
Each of these RF outputs can power one receiver.  
BNC socket ANT RF IN A  
antenna input of diversity section A  
º BNC socket ANT RF IN B  
antenna input of diversity section B  
¾ Four BNC sockets B1 to B4  
RF outputs of diversity section B for connection of  
the receivers  
5
 
               
Operating elements  
Block diagram  
The below block diagram (also depicted on the base of the  
device) shows the signal flow in the device.  
6
 
Putting the ASA 1 into operation  
Putting the ASA 1 into operation  
Preparing the ASA 1 for use  
For table-top use, fix the device feet to the base of the ASA 1.  
Do not fit the device feet when mounting the ASA 1 into a  
19” rack.  
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 ASA 1 on delicate surfaces.  
̈ Ensure that the base of the ASA 1 is clean and free from  
grease before fitting the device feet.  
̈ Fix the device feet to the base of the ASA 1 by peeling off  
the backing paper and fitting them as shown on the left.  
̈ Place the ASA 1 on a flat, horizontal surface.  
Fastening the stacking elements (see “Accessories and spare  
The stacking elements are designed to help protect the  
operating elements from damage or deformation, e.g. if the  
ASA 1 is dropped.  
To fasten the stacking elements:  
µ
̈ Unscrew and remove the four recessed head screws (M4x8).  
̈ Secure the stacking elements µ to the ASA 1.  
7
 
Putting the ASA 1 into operation  
Stacking several ASA 1  
You can stack the ASA 1 and the receivers on top of each other.  
.
CAUTION!  
Danger of injury due to toppling stacks!  
High stacks can easily topple over.  
̈ Place the stack on an absolutely flat surface.  
̈ Secure the stack against toppling over.  
̈ Stack the devices so that the recesses of the stacking  
elements completely engage with each other.  
Mounting the ASA 1 into a 19” rack  
Do not fit the device feet when mounting the ASA 1 into a  
19” rack.  
CAUTION!  
Risks when rack mounting the device!  
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 specifications.  
̈ When rack mounting, take good care not to affect the  
ventilation required for safe operation. If necessary, provide  
additional ventilation.  
̈ Make sure that the mechanical loading of the rack is even.  
̈ When connecting to the power supply, observe the  
information indicated on the type plate. Avoid circuit  
overloading. If necessary, provide overcurrent protection.  
8
 
Putting the ASA 1 into operation  
̈ When rack mounting, please note that intrinsically harmless  
leakage currents of the individual mains units may  
accumulate, thereby exceeding the allowable limit value. As  
a remedy, ground the rack via an additional ground  
connection.  
For rack mounting the ASA 1, you require (see “Accessories and  
• the GA 3 19“ rack adapter  
Rack mounting ̈ Unscrew and remove the two recessed head screws (M4x8)  
one ASA 1  
on one side of the ASA 1.  
¹
Ƹ
¸
¸
̈ Hold one rack mount “ear” to the ASA 1.  
̈ Secure the rack mount “ear” ¸ to the side of the ASA 1  
using the two recessed head screws.  
̈ Repeat for the other rack mount “ear” as described above.  
̈ Secure the blanking plate ¹ to one of the rack mount  
“ears” ¸ using two recessed head screws (M 6x10).  
If you do not want to front mount the antennas:  
̈ Insert the two blanking plugs Ƹ into the holes of the  
blanking plate.  
9
 
 
Putting the ASA 1 into operation  
If you want to front mount the antennas:  
̈ Use the optional AM 2 antenna front mount kit (see  
ƹ
If you want to use remote antennas (see “Accessories and spare  
̈ Connect the remote antennas.  
To mount the ASA 1 into the rack:  
̈ Slide the ASA 1 with the mounted blanking plate into the  
19” rack.  
̈ Secure the rack mount “ears” ¸ to the 19” rack.  
If you are using the rod antennas ƹ:  
̈ Align the antennas in a V-shape to obtain the best possible  
reception.  
10  
 
Putting the ASA 1 into operation  
Rack mounting ̈ Place the two devices (e.g. the ASA 1 and a stationary  
two devices into  
the same 19” slot  
receiver) side by side upside-down onto a flat surface:  
ƺ
¸
¸
̈ Secure the jointing plate ƺ to the devices using six recessed  
head screws (M 3x6).  
̈ Secure the rack mount “ears” ¸ to the devices as described  
To mount the antennas:  
̈ Use remote antennas.  
To mount the devices into the rack:  
̈ Slide the devices into the 19” rack.  
̈ Secure the rack mount “ears” to the 19” rack.  
11  
 
Putting the ASA 1 into operation  
Connecting devices to the ASA 1 and switching  
the ASA 1 on  
Connecting the antennas  
Recommendation for optimum reception  
To ensure optimum reception even under difficult  
reception conditions, we recommend using remote  
antennas.  
̈ You can connect the following antenna types to the antenna  
inputs and º:  
– two A 1031-U or A 2003-UHF passive antennas  
– or a combination of passive antenna (A 1031-U or  
A 2003-U) and antenna booster (AB 3).  
º ¶  
Connecting the receivers  
You can connect up to four stationary receivers (e.g. EM 100 G3,  
EM 300 G3 or EM 500 G3) to the ASA 1. The splitter also  
incorporates DC distribution for powering the receivers.  
̈ Connect one of the receiver’s antenna inputs to one of the  
BNC sockets A1 to A4 ². Suitable BNC cables are included in  
the delivery.  
These receivers do not require their individual power supply.  
They are now powered via the BNC sockets A1 to A4 ².  
²
¾
̈ Connect the other antenna input of the receiver to one of  
the BNC sockets B1 to B4 ¾. Suitable BNC cables are  
included in the delivery.  
12  
 
 
Putting the ASA 1 into operation  
Connecting the ASA 1 to the mains  
For powering the ASA 1, the connected receivers and two  
optional antenna boosters, you require the NT 1-1 mains unit  
Using the correct mains unit  
Only use the NT 1-1 mains unit with the blue DC  
connector. It is designed for the ASA 1 and ensures safe  
operation.  
̈ Pass the cable of the NT 1-1 mains unit through the cable  
grip ».  
̈ Insert the blue DC connector of the NT 1-1 mains unit into  
the DC IN socket ¿.  
¿ »  
̈ Plug the mains unit into a wall socket.  
The operation indicator · lights up green. The ASA 1 is  
ready for operation.  
Switching the ASA 1 on  
̈ Briefly press the On/Off button ³.  
The operation indicator · lights up green. The RF signals of  
the connected antennas are distributed to all connected  
receivers.  
·
³
Setting the ASA 1 to standby mode  
̈ Press the On/Off button ³ for approx. 2 seconds.  
The operation indicator · goes off. The ASA 1 switches to  
standby mode. Connected antenna boosters are switched  
off. Connected receivers are switched off, provided that they  
are powered via the BNC sockets A1 to A4 ².  
·
³
Disconnecting the ASA 1 from the mains  
The On/Off button ³ only deactivates the supply voltage for  
the antenna boosters and receivers but does not disconnect the  
ASA 1 from the mains. To disconnect the ASA 1 from the mains:  
·
³
̈ Unplug the mains unit from the wall socket.  
The operation indicator · goes off. The ASA 1 is switched  
off.  
13  
 
 
Putting the ASA 1 into operation  
Making an 8-channel system using the ASA 1  
There are two ways to link two ASA 1 together to create a 1-to-8 diversity splitter:  
First possibility: Two antennas supply an 8-channel system  
ASA 1  
ASA 1  
AB 3*  
AB 3*  
* AB-3 antenna boosters are only required for longer antenna cables (from approx.  
10 m).  
14  
 
Putting the ASA 1 into operation  
Second possibility: Linking two 4-channel systems  
ASA 1  
ASA 1  
AB 3*  
AB 3*  
* AB-3 antenna boosters are only required for longer antenna cables (from approx.  
10 m).  
15  
 
Cleaning the ASA 1  
Cleaning the ASA 1  
CAUTION!  
Liquids can damage the electronics of the device!  
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 ASA 1 from the mains (see  
page 13).  
̈ Only use a slightly damp cloth to clean the device.  
If a problem occurs ...  
Problem  
Possible cause  
Possible solution  
Receivers  
cannot be  
switched on  
Receivers are not  
powered  
Check the connections  
of the NT 1-1 mains unit  
and/or check the BNC  
sockets A1 to A4 ²  
Disturbed RF Antennas are not  
Check the antenna  
reception  
connected correctly  
connections (see page 12)  
Connection cables are  
defective  
Replace the connection  
cables  
Excessive RF signal  
Only use the recommended  
attenuation due to too antenna cables (see  
long antenna cables  
or incorrect type of  
antenna cable  
or use shorter antenna  
cables  
or use AB-3 antenna  
boosters from the matching  
frequency range and  
connect them the correct  
way round  
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.  
16  
 
Accessories and spare parts  
Accessories and spare parts  
The following ASA 1 accessories are available from your  
Sennheiser partner:  
Cat. No. Accessory/spare part  
503158 NT 1-1 EU  
503873 NT 1-1 US  
503874 NT 1-1 UK  
Mains unit for powering the ASA 1,  
four receivers and two antenna boosters,  
EU version  
Mains unit for powering the ASA 1,  
four receivers and two antenna boosters,  
120 V version  
Mains unit for powering the ASA 1,  
four receivers and two antenna boosters,  
UK version  
Mounting material  
503167 GA 3  
Rack adapter  
009912 AM 2  
Antenna front mount kit  
(for GA 3 rack adapter)  
532711  
Stacking elements (1 pair)  
Antennas  
004645 A 1031-U  
Broadband remote antenna  
003658 A 2003-UHF  
Broadband directional antenna  
Antenna boosters  
502567 AB 3-A:  
502572 AB 3-G:  
502568 AB 3-B:  
502569 AB 3-C:  
502570 AB 3-D:  
502571 AB 3-E:  
516–558 MHz  
566–608 MHz  
626–668 MHz  
734–776 MHz  
780–822 MHz  
823–865 MHz  
Antenna cables (coaxial cable)  
002324 GZL 1019-A1 Type RG 58, BNC connectors, 1 m  
002325 GZL 1019-A5 Type RG 58, BNC connectors, 5 m  
002326 GZL 1019-A10 Type RG 58, BNC connectors, 10 m  
17  
 
 
Specifications  
Specifications  
ASA 1 antenna splitter  
Antenna cable  
2 x 1:4 or 1 x 1:8, active  
8 items, 50 cm, BNC  
Frequency range  
500 to 870 MHz at –3 dB  
Amplification In A – Out A  
Amplification In A – Out A1 ... A4  
Amplification In B – Out B1 ... B4  
Impedance  
0 ± 1 dB  
0 ± 1 dB  
0 ± 1 dB  
50 Ω  
Operating voltage  
13.8 V DC (with NT 1-1 mains unit)  
Total current consumption  
max. 2.0 A with 4 receivers and 2 antenna boosters  
Supply voltage of antenna boosters  
at ANT RF IN A and ANT RF IN B  
12 V, 130 mA  
Supply voltage of receivers at  
A1 ... A4  
12 V (protected from reverse feed), 350 mA  
5 to 95%  
Relative humidity  
Operating temperature range  
Storage temperature range  
Dimensions of housing  
Weight  
–10°C to +55°C  
–20°C to +70°C  
approx. 212 x 168 x 43 mm  
approx. 1090 g  
Type approvals  
In compliance with  
EMC  
Radio  
Safety  
EN 301489-1/-9  
EN 300422-1/-2  
EN 60065  
47 CFR 15  
subpart B  
Approved by  
Industry Canada RSS 210, IC: 2099A-G3 EM 100  
18  
 
Manufacturer Declarations  
Manufacturer Declarations  
Warranty  
Sennheiser electronic GmbH & Co. KG gives a warranty of  
24 months on this product.  
Additional warranty conditions can be found on our website at  
Warranty”.  
CE Declaration of Conformity  
This device is in compliance with the essential requirements  
and other relevant provisions of Directive 1999/5/EC. The  
Before putting the device 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 inter-  
ference that may cause undesired operation.  
Changes or modifications made to this equipment not expressly  
approved by Sennheiser electronic Corp. may void the FCC  
authorization to operate this equipment.  
19  
 

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