KRAMER ELECTRONIC S LTD.
USER MANUAL
MODEL:
VM-5 0A N
1:5 Audio Distributor
P/N: 2900-000050 Rev 3
VM-50AN – Contents
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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 VM-50AN 1:5 Audio Distributor 4
4 Using Your VM-50AN 1:5 Audio Distributor 6
4.1 Connecting the VM-50AN as a Balanced Stereo 1:5 Audio Distributor 6
4.2 Connecting the VM-50AN as an Unbalanced Stereo 1:5 Audio Distributor 7
4.3 Connecting the VM-50AN as a 1:10 Audio Distributor 8
5 Technical Specifications 10
Figures
Figure 1: VM-50AN 1:5 Audio Distributor 4
Figure 2: Connecting the VM-50AN as a Balanced Stereo 1:5 Audio Distributor 7
Figure 3: Connecting the VM-50AN as an Unbalanced Stereo 1:5 Audio Distributor 8
Figure 4: Connecting the VM-50AN as a 1:10 Audio Distributor 9
VM-50AN - 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 VM-50AN 1:5 Audio Distributor, which
is ideal for the following typical applications:
Video/audio duplication studios and retail outlets
Any audio system requiring multiple outputs from a single source
2
VM-50AN - Getting Started
Go to http://www.kramerelectronics.com/support/product_downloads.asp
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 VM-50AN away from moisture, excessive sunlight and
dust
VM-50AN - 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
VM-50AN - Overview
3 Overview
The VM-50AN is a high-performance distribution amplifier for balanced and
unbalanced stereo audio signals. It takes one balanced or unbalanced stereo input
and distributes the signal simultaneously to ten stereo outputs (five balanced and
five unbalanced).
In addition, the VM-50AN features:
A balanced/unbalanced input selection button
Left and right level (gain) controls
Operation as a stand-alone distributor, or as a companion to other Kramer
“50” series products like the VM-50V video DA, or the VM-50YC s-Video DA
The VM-50AN is housed in a desktop sized enclosure. Two units can be rack
mounted side-by-side with the optional RK-1 adapter in a 1U rack space.
3.1 Defining the VM-50AN 1:5 Audio Distributor
This section defines the VM-50AN.
Figure 1: VM-50AN 1:5 Audio Distributor
VM-50AN - Overview
5
#
Feature
Function
1
POWER Switch
Illuminated switch supplying power to the unit
2
INPUT MODE BAL/UNBAL Button
When released, selects the balanced stereo audio
input when pushed in, selects the unbalanced
stereo audio
3
RIGHT LEVEL Trimmer
Adjusts the right output signal level (use a small
screwdriver)
4
LEFT LEVEL Trimmer
Adjusts the left output signal level (use a small
screwdriver)
5
INPUT 3.5mm Mini Plug Connector
Connects to the unbalanced audio source
6
INPUT Terminal Block Connector
Connects to the balanced audio source
7
OUT 3.5mm Mini Plug Connector
Connects to the unbalanced audio acceptor (from 1
to 5)
8
OUT Terminal Block Connector
Connects to the balanced audio acceptor (from 1 to
5)
9
12 VDC 200mA
+12V DC connector for powering the unit
6
VM-50AN - Using Your VM-50AN 1:5 Audio Distributor
Always switch off the power to each device before connecting it to your
VM-50AN. After connecting your VM-50AN, connect its power and
then switch on the power to each device.
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4 Using Your VM-50AN 1:5 Audio Distributor
This section describes how to connect the VM-50AN as:
A balanced stereo 1:5 audio distributor, see Section 4.1
An unbalanced stereo 1:5 audio distributor, see Section 4.2
A 1:10 audio distributor, see Section 4.3
4.1 Connecting the VM-50AN as a Balanced Stereo 1:5 Audio Distributor
To connect and operate the VM-50AN as a balanced stereo 1:5 audio distributor,
as the example in Figure 2 illustrates, do the following:
1. Connect a balanced stereo audio source (for example, a balanced stereo
player) to the INPUT terminal block connector.
2. Connect up to five balanced stereo audio acceptors (for example, balanced
stereo recorders) to the OUT terminal block connectors.
You do not have to connect all the outputs.
3. Connect the 12V DC power adapter to the power socket, connect the
adapter to the mains electricity, and then turn on the power switch.
4. Release the BAL/UNBAL INPUT MODE button to select balanced stereo
audio operation.
5. Adjust the right and/or left output signal level, if required.
Insert a screwdriver into the hole and carefully rotate it, to trim the level.
VM-50AN - Using Your VM-50AN 1:5 Audio Distributor
7
Figure 2: Connecting the VM-50AN as a Balanced Stereo 1:5 Audio Distributor
4.2 Connecting the VM-50AN as an Unbalanced Stereo 1:5 Audio Distributor
To connect the VM-50AN as an unbalanced stereo 1:5 audio distributor, as the
example in Figure 3 illustrates, do the following:
1. Connect the unbalanced stereo audio source (for example, a PC sound
card) to the INPUT mini 3.5mm socket.
2. Connect up to five unbalanced stereo audio acceptors (for example,
balanced stereo recorders) to the OUT mini 3.5mm sockets.
You do not have to connect all the outputs.
3. Connect the 12V DC power adapter to the power socket, connect the
adapter to the mains electricity, and then turn on the power switch.
4. Push in the BAL/UNBAL INPUT MODE button to select unbalanced stereo
audio operation.
5. Adjust the right and/or left output signal level, if required.
Insert a screwdriver into the hole and carefully rotate it, to trim the level.
8
VM-50AN - Using Your VM-50AN 1:5 Audio Distributor
Warning:
Both formats cannot be connected to the machine at
the same time, as they share some of the input
connections
!
Figure 3: Connecting the VM-50AN as an Unbalanced Stereo 1:5 Audio Distributor
4.3 Connecting the VM-50AN as a 1:10 Audio Distributor
To connect the VM-50AN as a 1:10 audio distributor, as the example in Figure 4
illustrates, do the following:
1. Connect either (but not both simultaneously) the:
Balanced stereo audio source to the INPUT terminal block connector
(and release the BAL/UNBAL INPUT MODE button to select balanced
stereo audio operation), or
Unbalanced stereo audio source to the INPUT mini 3.5mm socket (and
push in the BAL/UNBAL INPUT MODE button to select unbalanced
stereo audio operation)
2. Connect up to 10 acceptors, as follows:
5 balanced stereo audio acceptors to the OUT terminal block
connectors, and
5 unbalanced stereo audio acceptors to the OUT mini 3.5mm sockets
VM-50AN - Using Your VM-50AN 1:5 Audio Distributor
9
3. Connect the 12V DC power adapter to the power socket, connect the
adapter to the mains electricity, and then turn on the power switch.
4. Adjust the right and/or left output signal level, if required.
Insert a screwdriver into the hole and carefully rotate it, to trim the level.
Figure 4: Connecting the VM-50AN as a 1:10 Audio Distributor
10
VM-50AN - Technical Specifications
INPUTS:
1 balanced stereo audio, +4dBm 50k on detachable
terminal block connector
1 unbalanced stereo audio, 1Vpp/50k on mini 3.5mm
socket
OUTPUTS:
5 balanced stereo audio, +4dBm 50 on detachable
terminal block connectors
5 unbalanced stereo audio, +22dBm 470 on mini
3.5mm sockets
MAX. OUTPUT LEVEL:
>24dBm
BANDWIDTH:
>40kHz; fully loaded
S/N RATIO:
84dB, unweighted
CONTROLS:
Level (for right and left): 0.4dB to 9.5dB
COUPLING:
Input: AC; Output: DC
AUDIO THD + NOISE:
0.002% @1kHz, balanced output
AUDIO 2nd HARMONIC:
0.022% @1kHz, balanced output
POWER CONSUMPTION:
12V DC, 200mA
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:
16.5cm x 12cm x 4.5cm (6.5” x 4.7” x 1.7”, W , D, H)
WEIGHT:
0.6kg (1.3lbs) approx.
ACCESSORIES:
Power supply
OPTIONS:
RK-1 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:
2900-000050
Rev:
3
!
SAFETY WARNIN G
Disconnect the unit from the power
supply before opening and servicing
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