Kramer VM-51 User manual

KRAMER ELECTRONICS LTD.
USER MANUAL
MODEL:
VM-51
1:5 Video Distributor
P/N: 2900-001036 Rev 2

VM-51 – Contents
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Contents
1Introduction 1
2Getting Started 2
2.1 Achieving the Best Performance 2
2.2 Safety Instructions 3
2.3 Recycling Kramer Products 3
3Overview 4
3.1 Defining the VM-51 1:5 Video Distributor 4
4Connecting the VM-51 6
5Technical Specifications 7
Figures
Figure 1: VM-51 1:5 Video Distributor 4
Figure 2: Connecting the VM-51 1:5 Video Distributor 6

VM-51 - 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-51 1:5 Video Distributor, which is
ideal for the following typical applications:
Video duplication studios, delivering high-quality video duplicates
Retail stores and other point-of-sale systems requiring an identical picture on
several monitors
Field and CCTV video distribution needs

2
VM-51 - 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
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).
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-51 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.
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VM-51 - Getting Started
3
2.2 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
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-51 - Overview
3 Overview
The VM−51 is a high−performance distribution amplifier for composite or SDI
video signals. It takes one input, provides correct buffering and isolation and
distributes the signal to five identical outputs.
The VM-51 features:
High bandwidth of 420MHz (−3dB)
Level (gain) and EQ (peaking) controls
Compact size, part of the Kramer TOOLS™ family of compact, high−quality
and cost−effective solutions
3.1 Defining the VM-51 1:5 Video Distributor
This section defines the VM-51.
Figure 1: VM-51 1:5 Video Distributor

VM-51 - Overview
5
#
Feature
Function
1
OUT BNC connectors
Connects to the video acceptors (up to 5)
2
INPUT BNC connector
Connects to the video source
3
Gain Trimmer
Adjusts the video signal level (using a small screwdriver)
4
EQ. Trimmer
Adjusts the video EQ. (equalization) compensation
5
ON LED
Illuminates when receiving power
6
12V DC
+12V DC connector for powering the unit

6
VM-51 - Connecting the VM-51
4 Connecting the VM-51
Always switch off the power to each device before connecting it to your
VM-51. After connecting your VM-51, connect its power and then
switch on the power to each device.
To connect the VM-51 as illustrated in the example in Figure 2:
1. Connect a composite video source (for example, a CV player) to the video
INPUT BNC connector.
2. Connect up to 5 video output BNC connectors to the appropriate video
acceptors (for example, CV displays).
Not all outputs need to be connected.
3. Connect the power adapter to the power socket and connect the adapter to
the mains electricity.
4. Adjust, if required, the output signal level (Gain) and/or the equalization level
(EQ.).
Figure 2: Connecting the VM-51 1:5 Video Distributor
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VM-51 - Technical Specifications
7
5 Technical Specifications
INPUTS:
1 composite video, 1Vpp/75Ω on a BNC connector
OUTPUTS:
5 composite video, 1Vpp/75Ω on BNC connectors
MAX. OUTPUT LEVEL:
2.3Vpp /75Ω
BANDWIDTH (-3dB):
360MHz
DIFF. GAIN:
0.05%
DIFF. PHASE:
0.07deg
K-FACTOR:
<0.05%
S/N RATIO:
73dB
CONTROLS:
Level: -0.9 to +1.9dB, EQ.: 0 to +4.5dB @ 5.8MHz
COUPLING:
DC
POWER CONSUMPTION:
12V DC, 80mA.
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:
9.9cm x 4.7cm x 2.4cm (3.9” x 1.85” x 0.94”) W, D, H
WEIGHT:
0.2 kg (0.44 lbs) approx.
ACCESSORIES:
Power supply, mounting brackets
Specifications are subject to change without notice at http://www.kramerelectronics.com

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: [e-mail]
P/N:
2900-001036
Rev:
2
!
SAFETY WARNING
Disconnect the unit from the power
supply before opening and servicing