KRAMER ELECTRONIC S LTD.
USER MANUAL
MODEL:
48 2x l
Bidirectional Audio Transcoder
P/N: 2900-000134 Rev 3
482xl – Contents
i
Contents
1 Introduction 1
2 Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 3
2.3 Recycling Kramer Products 3
3 Overview 4
3.1 Defining the 482xl Bidirectional Audio Transcoder 4
4 Connecting the 482xl 6
4.1 Adjusting the Audio Output Level 7
5 Technical Specifications 8
Figures
Figure 1: 482xl Bidirectional Audio Transcoder 5
Figure 2: Connecting the 482xl Bidirectional Audio Transcoder 7
482xl - Introduction
1
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
2
482xl - Getting Started
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).
This equipment is to be used only inside a building. It may only be
connected to other equipment that is installed inside a building.
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!
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
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
482xl - Getting Started
3
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
!
2.2 Safety Instructions
2.3 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
go to our recycling pages at http://www.kramerelectronics.com/support/recycling/.
4
482xl - Overview
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.
482xl - Overview
5
#
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
BAL TO
UNBAL
L LEVEL Trimmer
Adjust the left balanced audio output signal level
4
R LEVEL Trimmer
Adjust the right balanced audio output signal
level 5 ON LED
Illuminates when receiving power
6
BALANCED IN 5-pin Terminal Block
Connector
Connect to the balanced audio source
7
UNBAL OUT 3-pin Terminal Block
Connector
Connect to the unbalanced audio acceptor
8
UNBAL IN 3-pin Terminal Block
Connector
Connect to the unbalanced audio source
9
BALANCED OUT 5-pin Terminal
Block Connector
Connect to the balanced audio acceptor
10
12V DC
+12V DC connector for powering the unit
Figure 1: 482xl Bidirectional Audio Transcoder
6
482xl - 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
on the power to each device.
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4 Connecting the 482xl
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).
482xl - Connecting the 482xl
7
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
2. Carefully rotate the screwdriver, adjusting the appropriate audio output level,
482xl Bi-directional Audio Transcoder, enabling access to the appropriate
trimmer.
as required.
8
482xl - 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:
Balanced: 21dBu; unbalanced: 21dBu @max gain.
BANDWIDTH (-3dB):
>100 kHz
CONTROLS:
-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:
0.049%
2ND HARMONIC:
0.005%
S/N RATIO:
95db/87dB @ balanced to unbalanced/unbalanced to
balanced, unweighted
POWER CONSUMPTION:
12V DC, 190mA (fully loaded)
OPERATING TEMPERATURE:
0° to +40°C (32° to 104°F)
STORAGE TEMPERATURE:
-40° to +70°C (-40° to 158°F)
HUMIDITY:
10% to 90%, RHL non-condensing
DIMENSIONS:
12cm x 7.5cm x 2.5cm (4.7" x 2.95" x 0.98"), W, D, H
WEIGHT:
0.3kg (0.66lbs) approx.
ACCESSORIES:
Power supply, mounting bracket
OPTIONS:
RK-3T 19" rack adapter
Specifications are subject to change without notice at http://www.kramerelectronics.com
5 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.
Web site: www.kramerelectronics.com
E-mail: info@kramerel.com
P/N:
2900-000134
Rev:
3
!
SAFETY WARNIN G
Disconnect the unit from the power
supply before opening and servicing
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