Kramer Electronics Welding System 482xl User Manual

KRAMER ELECTRONICS LTD.

USER MANUAL

MODEL:

482xl

Bidirectional Audio Transcoder

P/N: 2900-000134 Rev 3

Contents

Introduction

Getting Started

Achieving the Best Performance

Recycling Kramer Products

Overview

3.1

Defining the 482xl Bidirectional Audio Transcoder

Connecting the 482xl

4.1

Adjusting the Audio Output Level

Technical Specifications

Figures

Figure 1: 482xl Bidirectional Audio Transcoder

Figure 2: Connecting the 482xl Bidirectional Audio Transcoder

482xl – Contents

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

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).

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.

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

go to our recycling pages at http://www.kramerelectronics.com/support/recycling/.

482xl - Getting Started

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

Figure 1: 482xl Bidirectional Audio Transcoder

Feature

Function

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

R LEVEL Trimmer

Adjust the right unbalanced audio output signal

level

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

ON LED

Illuminates when receiving power

BALANCED IN 5-pin Terminal Block

Connect to the balanced audio source

Connector

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

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.

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

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

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

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.

Web site: www.kramerelectronics.com

E-mail: [email protected]

SAFETY WARNING

Disconnect the unit from the power

supply before opening and servicing

P/N:

Rev:

2900- 000134

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