Kramer VA-4 User Manual
KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
VA-4
Dual Channel Balanced Stereo
Audio Amplifier
P/N: 2900-000004 Rev 2A
VA-4 – Contents i
Contents
1 Introduction 1
2 Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 2
2.3 Recycling Kramer Products 3
3 Overview 4
3.1 Defining the VA-4 Dual Channel Balanced Stereo Audio Amplifier 4
4 Connecting the VA-4 7
4.1 Connecting to the VA-4 via RS-232 8
5 Technical Specifications 10
6 Protocol 2000 11
Figures
UFigure 1: VA-4 Dual Channel Balanced Stereo Audio Amplifier Front PanelU 5
UFigure 2: VA-4 Dual Channel Balanced Stereo Audio Amplifier Rear PanelU 6
UFigure 3: Connecting the VA-4 Dual Channel Balanced Stereo Audio AmplifierU 8
UFigure 4: Crossed Cable RS-232 ConnectionU 9
UFigure 5: Straight Cable RS-232 Connection with a Null Modem AdapterU 9
VA-4 - 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 VA-4 Dual Channel Balanced Stereo
Audio Amplifier, which is ideal for the following typical applications:
• Presentation audio level control
• Recording studios and broadcast studios for on-line signal distribution
2 VA-4 - Getting Started
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
• Use Kramer high performance high resolution cables
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 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 VA-4 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.
2.2 Safety Instructions
Caution: No operator serviceable parts inside the unit
Warning:
You use only the power cord that is supplied with the
unit. Do not open the unit. High voltages can cause
electrical shock! Servicing by qualified personnel only.
Warning:
Disconnect the power and unplug the unit from the wall
before installing
i
!
!
VA-4 - Getting Started 3
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/.
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