Kramer Electronics Welding System 482xl User Manual

KRAMER ELECTRONICS LTD.  
USER MANUAL  
MODEL:  
482xl  
Bidirectional Audio Transcoder  
P/N: 2900-000134 Rev 3  
 
1
Introduction  
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been  
providing a world of unique, creative, and affordable solutions to the vast range of  
problems that confront video, audio, presentation, and broadcasting professionals  
on a daily basis. In recent years, we have redesigned and upgraded most of our  
line, making the best even better!  
Our 1,000-plus different models now appear in 11 groups that are clearly defined  
by function: GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers;  
GROUP 3: Control Systems; GROUP 4: Format/Standards Converters; GROUP 5:  
Range Extenders and Repeaters; GROUP 6: Specialty AV Products; GROUP 7:  
Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9:  
Room Connectivity; GROUP 10: Accessories and Rack Adapters and GROUP 11:  
Sierra Products.  
Congratulations on purchasing your Kramer 482xl Bidirectional Audio Transcoder,  
which is ideal for the following typical applications:  
Video and audio production facilities  
Audio recording studios  
Live sound applications  
482xl - Introduction  
1
 
 
2
Getting Started  
We recommend that you:  
Unpack the equipment carefully and save the original box and packaging  
materials for possible future shipment  
Review the contents of this user manual  
Go to http://www.kramerelectronics.com to check for up-to-date  
user manuals, application programs, and to check if firmware  
upgrades are available (where appropriate).  
i
2.1  
Achieving the Best Performance  
To achieve the best performance:  
Use only good quality connection cables (we recommend Kramer high-  
performance, high-resolution cables) to avoid interference, deterioration in  
signal quality due to poor matching, and elevated noise levels (often  
associated with low quality cables)  
Do not secure the cables in tight bundles or roll the slack into tight coils  
Avoid interference from neighboring electrical appliances that may adversely  
influence signal quality  
Position your Kramer 482xl away from moisture, excessive sunlight and dust  
This equipment is to be used only inside a building. It may only be  
connected to other equipment that is installed inside a building.  
!
2
482xl - Getting Started  
 
   
2.2  
2.3  
Safety Instructions  
Caution:  
There are no operator serviceable parts inside the unit  
!
Warning: Use only the Kramer Electronics input power wall  
adapter that is provided with the unit  
Warning: Disconnect the power and unplug the unit from the wall  
before installing  
Recycling Kramer Products  
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC  
aims to reduce the amount of WEEE sent for disposal to landfill or incineration by  
requiring it to be collected and recycled. To comply with the WEEE Directive,  
Kramer Electronics has made arrangements with the European Advanced  
Recycling Network (EARN) and will cover any costs of treatment, recycling and  
recovery of waste Kramer Electronics branded equipment on arrival at the EARN  
facility. For details of Kramer’s recycling arrangements in your particular country  
482xl - Getting Started  
3
 
   
3
Overview  
The 482xl is a high−performance audio transcoder for balanced and unbalanced  
stereo audio signals. The unit has two separate channels (both function  
independently; use just one channel or both channels simultaneously) that  
convert:  
An unbalanced audio input signal to a balanced audio output signal on one  
channel  
Balanced audio is more immune to noise and interference.  
A balanced audio input signal to an unbalanced audio output signal on the  
other channel  
In addition, the 482xl Bi-directional Audio Transcoder features:  
Gain or attenuation adjustments while transcoding, to compensate for the  
14dB change between IHF audio levels and the state-of-the-art balanced  
DAT input levels  
Very low-noise and low-distortion components  
3.1  
Defining the 482xl Bidirectional Audio Transcoder  
This section defines the 482xl.  
4
482xl - Overview  
 
   
Figure 1: 482xl Bidirectional Audio Transcoder  
#
Feature  
Function  
1
UNBAL  
TO BAL  
L LEVEL Trimmer  
Adjust the left unbalanced audio output signal  
level  
Insert a screwdriver into the small hole and  
carefully rotate it, trimming the appropriate level  
2
R LEVEL Trimmer  
Adjust the right unbalanced audio output signal  
level  
3
4
BAL TO  
UNBAL  
L LEVEL Trimmer  
Adjust the left balanced audio output signal level  
R LEVEL Trimmer  
Adjust the right balanced audio output signal  
level  
5
6
ON LED  
Illuminates when receiving power  
BALANCED IN 5-pin Terminal Block  
Connect to the balanced audio source  
Connector  
7
8
9
UNBAL OUT 3-pin Terminal Block  
Connector  
Connect to the unbalanced audio acceptor  
Connect to the unbalanced audio source  
Connect to the balanced audio acceptor  
+12V DC connector for powering the unit  
UNBAL IN 3-pin Terminal Block  
Connector  
BALANCED OUT 5-pin Terminal  
Block Connector  
10 12V DC  
482xl - Overview  
5
 
 
4
Connecting the 482xl  
Always switch off the power to each device before connecting it to your  
482xl. After connecting your 482xl, connect its power and then switch  
i
on the power to each device.  
To convert the audio input signals at the UNBAL IN (to the balanced audio output)  
and the BALANCED IN (to the unbalanced audio output) connectors, as the  
example illustrated in Figure 2 shows, do the following:  
1. Connect the unbalanced audio source (for example, an unbalanced audio  
player) to the UNBAL IN 3-pin terminal block connector.  
2. Connect the BALANCED OUT 5-pin terminal block connector to the  
balanced audio acceptor (for example, a balanced audio recorder).  
3. Connect the balanced audio source (for example, a balanced audio player)  
to the BALANCED IN 5-pin terminal block connector.  
4. Connect the UNBAL OUT 3-pin terminal block connector to the unbalanced  
audio acceptor (for example an unbalanced audio recorder).  
5. Connect the 12V DC power adapter to the power socket and connect the  
adapter to the mains electricity (not shown in Figure 2).  
6
482xl - Connecting the 482xl  
 
 
Figure 2: Connecting the 482xl Bidirectional Audio Transcoder  
4.1 Adjusting the Audio Output Level  
The 482xl Bi-directional Audio Transcoder comes factory pre-set for 1:1  
transparency.  
Readjusting the 482xl Bi-directional Audio Transcoder upsets this transparency. However, if  
necessary, you can fine-tune both channels’ audio output levels.  
To adjust the appropriate audio output levels:  
1. Insert a screwdriver into one of the four small holes on the lower side of the  
482xl Bi-directional Audio Transcoder, enabling access to the appropriate  
trimmer.  
2. Carefully rotate the screwdriver, adjusting the appropriate audio output level,  
as required.  
482xl - Connecting the 482xl  
7
 
   
5
Technical Specifications  
INPUTS:  
1 unbalanced audio stereo on a 3-pin terminal block  
connector;  
1 balanced audio stereo on a 5-pin terminal block.  
OUTPUTS:  
1 balanced audio stereo on a 5-pin terminal block  
connector;  
1 unbalanced audio stereo on a 3-pin terminal block  
connector.  
MAX. OUTPUT LEVEL:  
BANDWIDTH (-3dB):  
CONTROLS:  
Balanced: 21dBu; unbalanced: 21dBu @max gain.  
>100 kHz  
-57dB to + 6dB (balanced to unbalanced level);  
-16dB to + 19dB (unbalanced to balanced level)  
COUPLING:  
Balanced to unbalanced: in=AC, out=DC;  
Unbalanced to balanced: in=AC, out=DC  
THD+NOISE:  
2ND HARMONIC:  
S/N RATIO:  
0.049%  
0.005%  
95db/87dB @ balanced to unbalanced/unbalanced to  
balanced, unweighted  
POWER CONSUMPTION:  
OPERATING TEMPERATURE:  
STORAGE TEMPERATURE:  
HUMIDITY:  
12V DC, 190mA (fully loaded)  
0° to +40°C (32° to 104°F)  
-40° to +70°C (-40° to 158°F)  
10% to 90%, RHL non-condensing  
12cm x 7.5cm x 2.5cm (4.7" x 2.95" x 0.98"), W, D, H  
0.3kg (0.66lbs) approx.  
DIMENSIONS:  
WEIGHT:  
ACCESSORIES:  
Power supply, mounting bracket  
RK-3T 19" rack adapter  
OPTIONS:  
Specifications are subject to change without notice at http://www.kramerelectronics.com  
8
482xl - Technical Specifications  
 
 
 
For the latest information on our products and a list of Kramer distributors,  
visit our Web site where updates to this user manual may be found.  
We welcome your questions, comments, and feedback.  
SAFETY WARNING  
Disconnect the unit from the power  
supply before opening and servicing  
!
P/N:  
Rev:  
2900- 000134  
3
 

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