Kramer Electronics, Ltd.
USER MANUAL
Model:
VS-421
4x1 Video Audio Switcher
Contents
1
Introduction 1
2
Getting Started 1
3
Overview 1
4
Your Video Audio Matrix Switcher 2
5
Connecting the Video Audio Switcher 3
6
Technical Specifications 4
Contents
Figures
Figure 1: VS-421 4x1 Video Audio Switcher 2
Figure 2: REMOTE PINOUT 3
Tables
Table 1: Front Panel Features and Functions of the VS-421 4x1 Video Audio Switcher 3
Table 2: Rear Panel Features and Functions of the VS-421 4x1 Video Audio Switcher 3
Table 3: VS-421 4x1 Video Audio Switcher Technical Specifications 4
i
Introduction
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 switchers and matrices, like the
VS-421 4x1 Video Audio Switcher, we also offer excellent distribution
amplifiers, presentation processors, interfaces, remote controllers and
computer-related products.
Congratulations on purchasing your Kramer VS-421 4x1 Video Audio
Switcher. This product is ideal for using with:
Any professional display system requiring video and audio switching
CCTV and security, point-of-sale, medical imaging, and rental
applications
Real time camera switching for broadcast and production systems
The package includes the following items:
VS-421 4x1 Video Audio Switcher
Power cord
This user manual
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 VS-421 4x1 Video Audio Switcher for composite video and audio stereo
signals enables the user to simultaneously route one of the 4 sources to a
monitor, projector, or an other receiving device.
In addition, the high performance VS-421 4x1 Video Audio Switcher:
Is controllable via the front panel buttons or via remote contact-closure
1
Your Video Audio Matrix Switcher
control (by shorting the corresponding pin to ground via a REMOTE terminal
block connector)
Includes a switch for choosing the vertical interval mode1 or the
immediate mode2
Includes video bandwidth exceeding 330 MHz, ensuring transparent
VGA / XGA performance even in critical broadcast and production
applications
Is useable for SDI (serial digital) and high line rate video signals
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 VS-421 4x1 Video
Audio Switcher in a location free from moisture and away from excessive
sunlight and dust
4 Your Video Audio Matrix Switcher
Figure 1 and Tables 1 and 2 define the VS-421 4x1 Video Audio Switcher:
Figure 1: VS-421 4x1 Video Audio Switcher
1 Produces glitch-free transitions when sources share a common reference sync
2 Switching occurs instantly
2
KRAMER ELECTRONICS, LTD.
Connecting the Video Audio Switcher
Table 1: Front Panel Features and Functions of the VS-421 4x1 Video Audio Switcher
# Feature Function
1 POWER Switch Illuminated switch supplying power to the unit
2 INPUT SELECTOR Buttons Select the video-audio source (from 1 to 4)
Table 2: Rear Panel Features and Functions of the VS-421 4x1 Video Audio Switcher
# Feature Function
1 VIDEO IN BNC Connectors Connects to the video-audio source (from 1 to 4)
2 REMOTE Detachable Terminal Block
Connector
3 IN = VERTICAL Switch Pushing in selects the vertical interval mode1,
4 VIDEO OUT BNC Connector Connects to the video-audio acceptor
5 AUDIO (R and L) IN RCA Connectors Connects to the video-audio source (from 1 to 4)
6 AUDIO (R and L) OUT RCA Connectors Connects to the video-audio acceptor
7 Power Connector with Fuse 230 VAC 50/60 Hz (115 VAC, U.S.A.) power inlet
Connects to a remote unit
releasing selects the immediate mode
5 Connecting the Video Audio Switcher
To connect a VS-421 4x1 Video Audio Switcher unit, do the following:
1. Connect up to 4 composite video-audio sources to the appropriate input
video connectors and input AUDIO L and AUDIO R connectors.
2. Connect the appropriate output video connector and output AUDIO L and
AUDIO R connectors to a composite video-audio acceptor.
3. Connect a remote unit2, if required, to the REMOTE terminal block 6 pin
connector, according to the PINOUT in Figure 2:
Figure 2: REMOTE PINOUT
4. Connect the power cord to the mains electricity.
1 Between Genlocked sources
2 A mechanical switcher with a common wire for ground or a security dry contact with a separate wire for ground
3
Technical Specifications
6 Technical Specifications
Table 3: VS-421 4x1 Video Audio Switcher Technical Specifications
Inputs:
Outputs:
Video Bandwidth: 330 MHz -3dB
Audio Bandwidth: 50 kHz, -1dB
Non Linearity: 0.1%
Diff. Gain: 0.1%.
Diff. Phase: 0.03 Deg
Luma S/N: >71 dB
K-Factor: <0.05%
Video Crosstalk: -65dB (SYNC)
Switching: Vertical interval or immediate
Control: 4 front-panel touch switches, contact closure
Dimensions: 24.5 cm x 18 cm x 4.5 cm (9.6" x 7" x 1.7"), W , D, H
Power Source: 230 VAC, 50/60 Hz (115VAC, U.S.A.) 4.6 VA
Weight: 1.4 kg. (3.1 lbs.) approx.
Accessories: Power cord
Options: 19" rack adapter RK-MEDN kit
4 composite video / SDI, 1Vpp / 75, on BNCs
4 audio stereo (or balanced mono), +30 dBm typ. on RCAs
1 composite video, 1Vpp / 75 on BNCs
1 audio stereo / balanced mono +30 dBm typ. on RCAs
4
KRAMER ELECTRONICS, LTD.
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 agent s 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) Carto ns, 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. T hese 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 t his product, damages based upon inconvenience, loss of use of t he product, loss
of time, commercial loss; or:
2. Any other damages, whether incidental, consequential or ot herwise. 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);
EN-50082: "Electromagnetic compatibility (EMC) generic immunity standard.
CFR-47: FCC Rules and Regulations:
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.
generic emission standard.
Part 1: Residential, commercial and light industry"
Part 1: Residential, commercial and light industry environment".
Part 15: “Radio frequency devices
Subpart B – Unintentional radiators”
5
For the latest information on our products and a list of Kramer
distributors, visit our Web site: www.kramerelectronics.com,
where updates to this user manual may be found.
We welcome your questions, comments and feedback.
P/N:
2900- 002032
Rev:
3
Kramer Electronics, Ltd.
Web site: www.kramerelectronics.com
E-mail: info@kramerel.com
P/N: 2900-002032 REV 3
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