Kramer Electronics Stereo Amplifier VM 20HD User Manual

Kramer Electronics, Ltd.  
USER MANUAL  
VM-20HD  
Dual 1:10 HD/SD – SDI Distribution Amplifier  
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Introduction  
1 Introduction  
Welcome to Kramer Electronics (since 1981): a world of unique, creative and  
affordable solutions to the infinite range of problems that confront the video,  
audio and presentation professional on a daily basis. In recent years, we have  
redesigned and upgraded most of our line, making the best even better! Our  
500-plus different models now appear in 8 Groups1, which are clearly defined  
by function.  
Congratulations on purchasing your Kramer VM-20HD Dual 1:10 HD2/SD3 -  
SDI Distribution Amplifier, which is ideal for:  
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SDI production studios for signal distribution  
Broadcast studios for on-air operation  
SDI field production  
Using with SDI video sources such as professional digital cameras  
The package includes the following items:  
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VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
Power cord  
This user manual4  
2 Getting Started  
We recommend that you:  
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Unpack the equipment carefully and save the original box and packaging  
materials for possible future shipment  
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Review the contents of this user manual  
Use Kramer high performance high resolution cables5  
2.1 Quick Start  
This quick start chart summarizes the basic setup and operation steps.  
1 GROUP 1: Distribution Amplifiers; GROUP 2: Video and Audio Switchers, Matrix Switchers and Controllers; GROUP 3:  
Video, Audio, VGA/XGA Processors; GROUP 4: Interfaces and Sync Processors; GROUP 5: Twisted Pair Interfaces;  
GROUP 6: Accessories and Rack Adapters; GROUP 7: Scan Converters and Scalers; and GROUP 8: Cables and Connectors  
2 High Definition (HD) means a video format, consisting of either 720 active lines of progressive video or 1080 lines of either  
progressive or interlaced video  
3 Standard Definition (SD) means an NTSC or PAL compatible video format, consisting of 480 (for NTSC) or 576 (for PAL)  
lines of interlaced video  
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Getting Started  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
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Overview  
3 Overview  
The VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier is a high  
performance dual channel distribution amplifier for SDI (SMPTE 259M and  
SMPTE 344M) and HD-SDI (SMPTE 292M) signals. It will take one input  
per channel, provide reclocking and equalization and distribute each signal to  
10 outputs, using BNC connectors.  
In particular, the VM-20HD:  
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Can be configured as a 1:20 DA  
Has an active loop BNC connector on each channel, for cascading  
additional units  
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Has a video bandwidth of 1.485Gbps that allows it to be used for standard  
definition and high definition serial digital video signals (SD/HD-SDI)  
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Is SMPTE 259M, 292M and 344M compliant  
Supports data rates of 270, 1483.5, and 1485Mbps  
Provides automatic, multi-rate, equalization and reclocking for losses  
typical with long runs of 75W co-axial cable  
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Has HD and SD output indication LEDs for each channel  
To achieve the best performance:  
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Connect 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)  
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Avoid interference from neighboring electrical appliances and position  
your Kramer VM-20HD away from moisture, excessive sunlight and dust  
4 Your VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
Figure 1 and Table 1 define the VM-20HD Dual 1:10 HD/SD - SDI  
Distribution Amplifier:  
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Your VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
Figure 1: VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
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Your VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
Table 1: VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier Features  
#
Feature  
POWER Switch  
Function  
1
2
3
4
5
6
7
Illuminated switch for turning the unit ON or OFF  
The green LED lights when the SDI signal in channel A is SD  
The blue LED lights when the SDI signal in channel A is HD  
The blue LED lights when the SDI signal in channel B is HD  
The green LED lights when the SDI signal in channel B is SD  
Connects to the channel B SDI source  
SD1 LED  
HD2 LED  
HD2 LED  
SD1 LED  
VIDEO IN  
CHANNEL A  
CHANNEL B  
CHANNEL B LOOP  
Connects the channel B input to the video input of an  
BNC  
additional unit or to the channel A video input3  
Connectors  
8
9
VIDEO  
Connects to the channel B SDI acceptors (from 1 to 10)  
Connects to the channel A SDI source  
OUTPUTS  
VIDEO IN  
10  
11  
12  
CHANNEL A LOOP  
Connects the channel A input to the video input of an  
BNC  
additional unit or to the channel B video input3  
Connectors  
VIDEO  
Connects to the channel A SDI acceptors (from 1 to 10)  
AC connector enabling power supply to the unit  
OUTPUTS  
Power Connector with Fuse  
1 Standard Definition (SD) means an NTSC or PAL compatible video format, consisting of 480 (for NTSC) or 576 (for PAL)  
lines of interlaced video  
2 High Definition (HD) means a video format, consisting of either 720 active lines of progressive video or 1080 lines of either  
progressive or interlaced video  
3 To create a 1:20 distribution amplifier (connect the LOOP output of one of the channels to the VIDEO IN of the other  
channel)  
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Installing the VM-20HD on a Rack  
5 Installing the VM-20HD on a Rack  
This section describes what to do before installing on a rack and how to rack  
mount.  
Before Installing on a Rack  
How to Rack Mount  
To rack-mount a machine:  
Before installing on a rack, be sure that the environment is  
within the recommended range:  
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Attach both ear brackets to the  
machine. To do so, remove the  
screws from each side of the machine  
(3 on each side), and replace those  
screws through the ear brackets.  
Operating temperature range +5 to +45 Deg. Centigrade  
5 to 65% RHL, non-condensing  
-20 to +70 Deg. Centigrade  
Operating humidity range  
Storage temperature range  
Storage humidity range  
5 to 95% RHL, non-condensing  
!
CAUTION!!  
When installing on a 19" rack, avoid hazards by taking  
care that:  
1
It is located within the recommended environmental  
conditions, as the operating ambient temperature of a  
closed or multi unit rack assembly may exceed the  
room ambient temperature.  
2
Place the ears of the machine  
against the rack rails, and insert the  
proper screws (not provided) through  
each of the four holes in the rack  
ears.  
Once rack mounted, enough air will still flow around the  
machine.  
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The machine is placed straight in the correct horizontal  
position.  
Note that:  
4
You do not overload the circuit(s). When connecting  
the machine to the supply circuit, overloading the  
circuits might have a detrimental effect on overcurrent  
protection and supply wiring. Refer to the appropriate  
nameplate ratings for information. For example, for  
fuse replacement, see the value printed on the product  
label.  
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In some models, the front panel  
may feature built-in rack ears  
Detachable rack ears can be removed  
for desktop use  
Always mount the machine in the rack  
before you attach any cables or  
connect the machine to the power  
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The machine is earthed (grounded) in a reliable way  
and is connected only to an electricity socket with  
grounding. Pay particular attention to supply  
connections other than direct connections to the  
branch circuit (for example, the use of power strips),  
and that you use only the power cord that is supplied  
with the machine.  
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If you are using a Kramer rack adapter  
kit (for a machine that is not 19"), see  
the Rack Adapters user manual for  
installation instructions (you can  
download it at:  
http://www.kramerelectronics.com)  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
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Connecting the VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
6 Connecting the VM-20HD Dual 1:10 HD/SD - SDI Distribution  
Amplifier  
To connect the VM-20HD, as the example in Figure 2 illustrates, do the following1:  
1. Connect an HD-SDI/SD-SDI video source (for example, an HD/SD SDI  
camera) to the CHANNEL A VIDEO IN BNC connector.  
2. Connect the CHANNEL A LOOP BNC connector to the CHANNEL B  
VIDEO IN BNC connector.  
3. Connect up to2 20 VIDEO OUTPUT BNC connectors to the appropriate  
HD/SD SDI video acceptors (for example, HD/SD SDI displays).  
4. Connect the power cord (not illustrated in Figure 2).  
Figure 2: Connecting the VM-20HD Dual 1:10 HD/SD - SDI Distribution Amplifier  
1 Switch OFF the power on each device before connecting it to your VM-20HD. After connecting your VM-20HD, switch on  
its power and then switch on the power on each device  
2 You do not have to connect all the outputs, connect only those that are required and leave the other output(s) unconnected  
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Technical Specifications  
7 Technical Specifications  
Table 2 includes the technical specifications:  
Table 2: Technical Specifications1 of the VM-20HD  
INPUTS:  
2 SMPTE-259M, 292M, 344M serial video, 75 ohms on a BNC  
connector  
OUTPUTS:  
22 equalized and reclocked SMPTE-259M, 292M, 344M outputs,  
75 ohms on BNC connectors  
RESOLUTION:  
8 and 10-bits (automatic)  
MAX. OUTPUT LEVEL: 800mVpp /75 ohms  
MAX. BAUD RATE:  
COUPLING:  
1.485Gbps  
AC  
POWER SOURCE:  
DIMENSIONS:  
WEIGHT:  
100-240VAC; 50/60Hz, 9VA  
19-inch (W), 7-inch (D), 1U (H)  
1.5kg. (3.3lbs.) approx.  
Power cord  
ACCESSORIES:  
1 Specifications are subject to change without notice  
KRAMER: SIMPLE CREATIVE TECHNOLOGY  
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LIMITED WARRANTY  
Kramer Electronics (hereafter Kramer) warrants this product free from defects in material and workmanship under the  
followingterms.  
HOW LONGIS THE WARRANTY  
Labor and parts are warranted for seven years from the date of the first customer purchase.  
WHOIS PROTECTED?  
Only the first purchase customer may enforce this warranty.  
WHAT ISCOVEREDANDWHAT ISNOT COVERED  
Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered  
by thewarranty:  
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  
2. Any product,on which theserial numberhas been defaced, modifiedor removed.  
3. Damage, deteriorationormalfunctionresultingfrom:  
i) Accident, misuse, abuse, neglect, fire, water, lightning orother acts ofnature  
ii) Product modification, orfailuretofollowinstructions suppliedwith theproduct  
iii) Repairorattemptedrepair by anyonenot authorized byKramer  
iv) Anyshipment of theproduct(claims must bepresentedtothe carrier)  
v) Removalor installationof theproduct  
vi) Anyothercause, whichdoes not relateto aproduct defect  
vii) Cartons, equipment enclosures, cables or accessoriesusedinconjunctionwiththeproduct  
WHAT WE WILLPAYFORAND WHAT WE WILLNOT PAYFOR  
Wewill pay laborand material expensesforcovereditems.Wewill notpayforthefollowing:  
1. Removal orinstallationscharges.  
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the  
responsibility oftheKramerdealer fromwhomthe 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 OFIMPLIED WARRANTIES  
All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to  
the length of this warranty.  
EXCLUSIONOFDAMAGES  
The liability of Kramer for any effective products is limited to the repair or replacement of the product at our option. Kramer shall  
not beliable for:  
1. Damage to otherproperty caused by defects inthis product, damages basedupon inconvenience, loss ofuseof theproduct, loss  
oftime, commercial loss;or:  
2. Any other damages, whether incidental, consequential or otherwise. Some countries may not allow limitations on howlong an  
implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above  
limitations andexclusions maynot applytoyou.  
Thiswarranty gives youspecificlegalrights, andyou may alsohaveotherrights, which varyfromplacetoplace.  
NOTE:Allproducts returned to Kramerfor servicemust haveprior approval.Thismay be obtainedfromyourdealer.  
Thisequipment has been testedtodeterminecompliancewiththerequirements of:  
EN-50081:  
"Electromagneticcompatibility(EMC);  
genericemissionstandard.  
Part 1: Residential, commercial and lightindustry"  
"Electromagneticcompatibility(EMC) genericimmunitystandard.  
Part 1: Residential, commercialand lightindustryenvironment".  
FCC Rules and Regulations:  
EN-50082:  
CFR-47:  
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 thesuppliedDCpower supplytofeedpowerto themachine.  
Pleaseuserecommended interconnection cablestoconnect themachineto other components.  
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For the latest information on our products and a list of Kramer  
where updates to this user manual may be found.  
We welcome your questions, comments and feedback.  
Safety Warning:  
Disconnect the unit from the power supply before  
opening/servicing.  
Caution  
Kramer Electronics, Ltd.  
P/N: 2900-000321 REV 2  
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