Kramer VM-3A User manual

Kramer Electronics, Ltd.
USER MANUAL
Model:
VM-3A
Audio Distributor

Contents
i
Contents
1 Introduction 1
2 Getting Started 1
3 Overview 1
4 Your Audio Distributor 2
5 Connecting Your Audio Distributor 3
6 Technical Specifications 3
Figures
Figure 1: VM-3A Audio Distributor 2
Figure 2: VM-3A Audio Distributor Connection 3
Tables
Table 1: Front Panel VM-3A Audio Distributor Features 2
Table 2: Rear Panel VM-3A Audio Distributor Features 2
Table 3: VM-3A Audio Distributor Technical Specifications 3

Introduction
1
1 Introduction
Dedication by Kramer Electronics since 1981, to the development and
manufacture of high quality video/audio equipment, makes the Kramer line
an integral part of the finest production and presentation facilities in the
world. In recent years, Kramer has redesigned and upgraded most of the line,
making the best even better! The Kramer line of professional video/audio
electronics is one of the most versatile and complete available and is a true
leader in terms of quality, workmanship, price/performance ratio and
innovation. In addition to our high quality distribution amplifiers, we also
offer excellent switchers and matrices, remote controllers, processors,
interfaces and computer-related products. Congratulations on purchasing your
Kramer VM-3A Audio Distributor.
This product is ideal for the following typical applications:
 Video/Audio duplication studios
 Retail outlets and home theater systems
 Any audio system requiring multiple outputs from a single source
The package includes the following items:
 VM-3A Audio Distributor
 Power adapter
 This user manual and the Kramer concise product catalog/CD
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
3 Overview
The VM-3A Audio Distributor is a high quality 1:3 Balanced Stereo Audio
Distribution Amplifier. The VM-3A:
 Splits a single input source to 3 identical outputs with no discernible
signal degradation
 Achieves a signal output level reaching +20dBm
 Has front panel right/left signal level trimmer controls
 Can function as a 1:3 unbalanced stereo audio DA

Your Audio Distributor
KRAMER ELECTRONICS, LTD.
2
Achieving the best performance means:
 Connecting only good quality connection cables, thus avoiding
interference, deterioration in signal quality due to poor matching, and elevated
noise levels (often associated with low quality cables)
 Avoiding interference from neighboring electrical appliances that may
adversely influence signal quality and positioning your Kramer VM-3A in a
location free from moisture and away from excessive sunlight and dust
4 Your Audio Distributor
Figure 1 illustrates the front and rear panels of the VM-3A. Tables 1 and 2
define the front and rear panels of the VM-3A, respectively.
Figure 1: VM-3A Audio Distributor
Table 1: Front Panel VM-3A Audio Distributor Features
# Feature Function
1 Left LEVEL Trimmer Adjusts
1
the left output signal level
2 Right LEVEL Trimmer
Adjusts
1
the right output signal level
3 ON LED Illuminates when receiving power
Table 2: Rear Panel VM-3A Audio Distributor Features
# Feature Function
1 INPUT Detachable Terminal Block Connector
Connects to the audio source
2 OUT Detachable Terminal Block Connector Connects to the audio acceptor (from 1 to 3)
3 12 VDC +12V DC connector for powering the unit
1 Insert a screwdriver into the small hole and carefully rotate it, trimming the appropriate OUTPUT level

Connecting Your Audio Distributor
3
5 Connecting Your Audio Distributor
To connect the VM-3A, as the example in Figure 2 illustrates, do the following:
1. Connect the balanced stereo audio source and up to 3 balanced stereo
audio acceptors
1
to the rear panel of the VM-3A.
2. Connect the 12V DC power adapter to the power socket and connect the
adapter to the mains electricity.
The balanced stereo audio input is buffered to the balanced stereo audio
outputs and the ON LED lights.
Figure 2: VM-3A Audio Distributor Connection
6 Technical Specifications
Table 3 includes the technical specifications.
Table 3: VM-3A Audio Distributor Technical Specifications
Inputs: 1 balanced audio +4dBm 100 kon detachable terminal block connectors
Outputs: 3 balanced audio +4dBm 100 kon detachable terminal block connectors
Bandwidth: 330kHz -3dB
THD: 0.04% @ 1kHz
Coupling: DC
S/N Ratio: 68dB
Max Input/Output:
20dBm
Gain Range: - 0.7dB to + 8.6dB
Dimensions: 11.7cm x 6cm x 3.2cm (4.6” x 2.4” x 1.3”, W, D, H)
Power Source: 12 VDC, 80mA
Weight: 0.28kg (0.62lbs.) approx.
Accessories: 12 VDC power supply
1 Switch OFF the power on each device before connecting it to your VM-3A. After connecting your VM-3A, switch on its
power and then switch on the power on each device

KRAMER ELECTRONICS, LTD.
4
LIMITED WARRANTY
Kramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the
following terms.
HOW LONG IS THE WARRANTY
Labor and parts are warranted for three years from the date of the first customer purchase.
WHO IS PROTECTED?
Only the first purchase customer may enforce this warranty.
WHAT IS COVERED AND WHAT IS NOT COVERED
Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered
by the warranty:
1. Any product which is not distributed by Kramer, or which is not purchased from an authorized Kramer dealer. If you are
uncertain as to whether a dealer is authorized, please contact Kramer at one of the agents listed in the web site
www.kramerelectronics.com.
2. Any product, on which the serial number has been defaced, modified or removed.
3. Damage, deterioration or malfunction resulting from:
i) Accident, misuse, abuse, neglect, fire, water, lightning or other acts of nature
ii) Product modification, or failure to follow instructions supplied with the product
iii) Repair or attempted repair by anyone not authorized by Kramer
iv) Any shipment of the product (claims must be presented to the carrier)
v) Removal or installation of the product
vi) Any other cause, which does not relate to a product defect
vii) Cartons, equipment enclosures, cables or accessories used in conjunction with the product
WHAT WE WILL PAY FOR AND WHAT WE WILL NOT PAY FOR
We will pay labor and material expenses for covered items. We will not pay for the following:
1. Removal or installations charges.
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the
responsibility of the Kramer dealer from whom the product was purchased.
3. Shipping charges.
HOW YOU CAN GET WARRANTY SERVICE
1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.
2. Whenever warranty service is required, the original dated invoice (or a copy) must be presented as proof of warranty coverage,
and should be included in any shipment of the product. Please also include in any mailing a contact name, company, address, and
a description of the problem(s).
3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.
LIMITATION OF IMPLIED WARRANTIES
All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to
the length of this warranty.
EXCLUSION OF DAMAGES
The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer
shall not be liable for:
1. Damage to other property caused by defects in this product, damages based upon inconvenience, loss of use of the product, loss
of time, commercial loss; or:
2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations on how long an
implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above
limitations and exclusions may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights, which vary from place to place.
NOTE: All products returned to Kramer for service must have prior approval. This may be obtained from your dealer.
This equipment has been tested to determine compliance with the requirements of:
EN-50081: "Electromagnetic compatibility (EMC);
generic emission standard.
Part 1: Residential, commercial and light industry"
EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.
Part 1: Residential, commercial and light industry environment".
CFR-47: FCC Rules and Regulations:
Part 15: “Radio frequency devices
Subpart B – Unintentional radiators”
CAUTION!
Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or modifications to
the unit without the expressed approval of the manufacturer will void user authority to operate the equipment.
Use the supplied DC power supply to feed power to the machine.
Please use recommended interconnection cables to connect the machine to other components.

Kramer Electronics, Ltd.
Web site: www.kramerelectronics.com
E-mail: [email protected]
2900–001033 REV 2
For the latest information on our products and a list of Kramer
distributors, visit our Web site: www.kramerelectronics.com.
Updates to this user manual may be found at
http://www.kramerelectronics.com/manuals.html.
We welcome your questions, comments and feedback.