Kramer Electronics Car Amplifier 123V User Manual

Kramer Electronics, Ltd.  
USER MANUAL  
Differential Video Line Amplifier  
Model:  
123V  
IMPORTANT: Before proceeding, please read paragraph entitled  
"Unpacking and Contents"  
KRAMER ELECTRONICS LTD.  
 
1
INTRODUCTION  
Congratulations on your purchase of this Kramer Electronics Differential  
Line Amplifier. Since 1981, Kramer has been dedicated to the development and  
manufacture of high quality video/audio equipment. The Kramer line has become  
an integral part of many of the best production and presentation facilities around  
the world. In recent years, Kramer has redesigned and upgraded most of the line,  
making the best even better. Kramer’s 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 the  
Kramer line of high quality format interfaces, such as the one you have just  
purchased, Kramer also offers a full line of high quality distribution amplifiers,  
switchers, processors, controllers and computer-related products. This manual  
includes configuration, operation and option information for the 123V.  
2
A WORD ON DISTRIBUTION AMPLIFIERS  
Distribution amplifiers distribute one signal to several users. They vary in the  
number of inputs, looping capability, number of outputs, operating format,  
bandwidth and input/output coupling. Distribution amplifiers are used to  
distribute one video and/or audio source to several video/audio acceptors for  
simultaneous recording or monitoring one source.  
A quality distribution amplifier amplifies the incoming signal (video and  
audio), pre-compensates the signal for potential losses (resulting from the use of  
long cables, for example) and generates several identical buffered and amplified  
outputs. Often, a signal processor is inserted between the source and the  
distribution amplifier for correction and fine-tuning of the source signal before  
multiplication, so that all copies are corrected in the same way.  
There are many factors effecting signal quality when it is transmitted from a  
source to an acceptor:  
Source and acceptor signal handling capability. Since different equipment  
offer different degrees of quality, the final result is determined by the  
performance of the lowest quality item. Using a low quality source will  
always result in low quality duplicates.  
The connection cables should be of the best quality you can afford. Low  
quality cables are susceptible to interference, deteriorate signal quality  
due to poor matching and cause elevated noise levels.  
Sockets and connectors of the sources and acceptors, so often ignored,  
should be of best quality, as "Zero Ohm" connection resistance should be  
assured. Sockets and connectors should match the required impedance (75  
ohms is used in video). Cheap connectors tend to rust, causing breaks in  
the signal path.  
KRAMER ELECTRONICS LTD.  
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Amplifying circuitry quality is extremely important and should posses  
high linearity, low distortion and low noise operation.  
The distance between source and acceptors plays a major role in the final  
result. If long distances (over 15 meters) exist between sources and  
acceptors - special means should be taken in order to avoid cable loss,  
such as using higher quality cables or, if necessary, line amplifiers.  
Interference from neighboring appliances can have an adverse effect on  
signal quality. Balanced audio lines are less prone to interference, but  
unbalanced audio and video lines, even though the cables are shielded,  
should be installed far away from mains carrying cables, electric motors,  
transmitters, etc.  
In some cases, either an induced interference on the cable carrying the  
signals, or ground loop problems may severely disturb the video image on  
the screen. To solve this problem, a differential video line amplifier,  
designed to eliminate the interfering signals, is needed.  
3
HOW DO I GET STARTED?  
The fastest way to get started is to take your time and do everything right the first  
time. Taking 15 minutes to read the manual may save you a few hours later. You  
don’t even have to read the whole manual. If a section doesn’t apply to you, you  
don’t have to spend your time reading it.  
4
UNPACKING AND CONTENTS  
The items contained in your Kramer format interface package are listed below.  
Please save the original box and packaging materials for possible future shipment.  
Amplifier (123V)  
DC Power Supply  
4 Rubber Feet  
User Manual  
Kramer Concise Product Catalog  
Mounting Brackets  
4.1  
Optional Accessories  
The following accessories, which are available from Kramer, can enhance  
implementation of your machine. For information regarding cables and additional  
accessories, contact your Kramer dealer.  
Rack Adapter - Used to adapt smaller machines to a standard 1U or 3U  
rack. One or more machines may be installed on each adapter.  
KRAMER ELECTRONICS LTD.  
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105V - (1:5 Video Distribution Amplifier) can be serially connected  
between the output of the amplifier and several acceptors for video  
distribution. The 105V splits a single video input source into five identical  
outputs. The 105V uses an external 12VDC power source, and therefore is  
suitable for fieldwork as well. The 105V uses state of the art technology and  
microchip design, boasting a signal bandwidth of over 200MHz, thus  
making it suitable for the most demanding applications.  
SP-11 - (Video/Audio Processor) can be serially connected between the  
output of the 123V and the acceptor for video control/correction. The  
machine provides camera control and luminance/white balance correction. It  
is also capable of performing composite to Y/C conversion and bi-  
directional Transcoding. The machine allows full control over the video  
signal: video gain down to full fade, log or linear definition control, log or  
linear contrast control, color saturation control, black level control, red,  
green and blue controls and a screen splitter control for “before-after”  
comparison. The input control is "audio-follow-video".  
VIDEO TESTER - A new, unique, patented, indispensable tool for the  
video professional, the Video Tester is used to test a video path leading  
to/from an amplifier. By pressing only one touch switch it can trace missing  
signals, distinguish between good and jittery (VCR sourced) signals, and  
identify the presence of good signals. Whenever a video signal is missing,  
because of bad connections, cable breaks or faulty sources, the Video Tester  
is all you need.  
5
DIFFERENTIAL VIDEO LINE AMPLIFIER /DA  
This section describes the controls and connections of your Video DA.  
Understanding the controls and connections helps you realize the full power of  
your machine.  
5.1  
Getting to Know Your 123V  
The KRAMER 123V, one of the KRAMER TOOLS, is a high quality, state-of-  
the art Differential Video Line Amplifier designed for studios, retail outlets,  
showrooms and other demanding applications. The 123V splits a single input  
source into three identical outputs while almost completely isolating the input  
from the outputs. The 123V uses special differential amplifying circuitry,  
eliminating noise and hum problems commonly found in long video lines. The  
123V uses an external 12VDC power source, and is therefore suitable for  
fieldwork as well. The machine has trimmers for easy adjustment of output video  
levels and cable equalization.  
KRAMER ELECTRONICS LTD.  
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Figure 1: 123V Front Panel Features  
KRAMER ELECTRONICS LTD.  
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Table 1: 123V Front Panel Features  
Feature  
Function  
3 BNCs for Composite Video outputs.  
Output level control trimmer.  
Cable Compensation control trimmer.  
Video input BNC.  
1.  
2.  
3.  
4.  
5.  
COMPOSITE OUT  
GAIN  
EQ.  
INPUT  
Becomes lit when power is connected.  
ON LED  
6.  
12VDC feed connector A DC connector that allows power to be  
supplied to the unit.  
6
INSTALLATION  
Rack Mounting  
6.1  
The Kramer 123V may be rack mounted in a standard 19” EIA rack assembly,  
using a special TOOLS Adapter. A 1U version hold up to 2 TOOLS while the 3U  
version hold up to 8 TOOLS. (See section 4.1). To mount the machine, follow the  
installation instructions enclosed with the rack mount adapter. It can be also table  
mounted using mounting brackets provided. The device does not require any  
specific spacing above or below the unit for ventilation.  
7
CONNECTING TO VIDEO DEVICES  
Video sources and output devices (such as monitors, projectors or recorders) may  
be connected to the machine through the BNC connector located on the back of  
the unit.  
8
USING THE MACHINE  
Turning on the Machine  
8.1  
Notes  
The machine should only be turned on after all connections are completed and all  
source devices have been turned on. Do not attempt to connect or disconnect any  
video, audio or control signals to the machine while it is turned on!  
The socket-outlet should be near the equipment and should be easily accessible.  
To fully disconnect equipment, remove the power cord from the socket.  
KRAMER ELECTRONICS LTD.  
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8.2  
Operation  
Connect a cable leading from the INPUT connector of the 123V machine to  
the output of the video source.  
Connect up to three video acceptors to the OUT sockets of the 123V  
machine. Use best available coaxial cables for connection.  
Connect an appropriate 12VDC source to the DC socket of the 123V  
machine. Observe polarity. The built-in LED will light.  
Operate source and acceptor(s).  
Adjust the GAIN and EQ. (cable equalization) control trimmers on the  
123V machine only if necessary. Those trimmers are preset at the factory  
for unity gain, so re-adjusting them unnecessarily might upset the signal  
transparency.  
9
TYPICAL APPLICATION  
Figure 2 shows a typical application of the 123V for elimination of hum and noise  
picked up from a long video line or as a result of ground related problems.  
Figure 2: 123V Typical Application  
KRAMER ELECTRONICS LTD.  
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10 TAKING CARE OF YOUR MACHINE  
Do not locate your machine in an environment where it is susceptible to dust or  
moisture. Both of these may damage the electronics, and cause erratic operation  
or failure. Do not locate your machine where temperature and humidity may be  
excessive. Doing so may also damage the electronics, and cause erratic operation  
or failure of your machine. Do not clean your machine with abrasives or strong  
cleaners. Doing so may remove or damage the finish, or may allow moisture to  
build up. Take care not to allow dust or particles to build up inside unused or  
open connectors.  
11 TROUBLESHOOTING  
NOTES  
Please note that if the output signal is disturbed or interrupted by very strong external  
electromagnetic interference, it should return and stabilize when such interference ends. If  
not, turn the power switch off and on again to reset the machine.  
If the following recommended actions do not result in satisfactory operation, please  
consult your KRAMER Dealer.  
11.1  
Power and Indicators  
Problem  
Remedy  
Confirm that power connections are secured at the  
machine and at the receptacle. Make sure the receptacle  
is active, outputting the proper voltage.  
If there is still no power use a Philips screwdriver to  
remove screws on both sides of the machine and release  
the panel.  
Locate the fuse inside your machine. Confirm that the  
fuse is good by looking for the wire connected between  
the ends of the fuse. If this wire is broken, replace fuse  
with another, with the same rating.  
No Power  
Install cover and tighten the Philips screws.  
KRAMER ELECTRONICS LTD.  
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11.2  
Video Signal  
Problem  
Remedy  
Confirm that your source and output devices are turned on  
and connected properly. The input of your machine  
should be of an identical signal format to the output of  
your source. Signals at the output of your machine should  
be of an identical signal format as at the input of your  
display.  
No video at the  
output device  
Confirm that any other device in the signal path have the  
proper input and/or output selected.  
Use the Video Tester to test the video path leading  
to/from your machine (see section 4.1"Video Tester")  
Verify that the lines are well matched through 75ohm  
impedances.  
Confirm that the connecting cables are of high quality and  
properly inserted.  
Check level controls located on your source input device  
or output display.  
Video level is too  
high or too dim.  
Adjust, only if absolutely necessary, the video level  
and/or cable equalization using the LEVEL and EQ.  
adjustment trimmers of the machine.  
12 TECHNICAL SPECIFICATIONS  
INPUT  
OUTPUTS  
1 Video, Differential, 1Vpp / 75on a BNC connector.  
3 Video, 1Vpp / 75on BNCs.  
VIDEO BANDWIDTH  
COUPLING  
DIFF. GAIN  
DIFF. PHASE  
S/N RATIO  
55 MHz -3dB.  
AC.  
0.25%.  
0.35 Deg.  
-76dB.  
K-FACTOR  
<0.05%.  
MAX. VIDEO OUTPUT 2 Vpp.  
POWER SOURCE  
WEIGHT  
12 VDC, 30mA.  
0.3 Kg (approx.), (0.66 Lbs.)  
DIMENSIONS  
12cm x 7.5cm x 2.5cm (4.7" x 2.95" x 0.98"), (W, D, H.)  
KRAMER ELECTRONICS LTD.  
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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  
2) Any product, on which the serial number has been defaced, modified or removed.  
3) Damage, deterioration or malfunction resulting from:  
a)  
Accident, misuse, abuse, neglect, fire, water, lightning or other acts of  
nature.  
b)  
Product modification, or failure to follow instructions supplied with the  
product.  
c)  
d)  
e)  
f)  
Repair or attempted repair by anyone not authorized by Kramer.  
Any shipment of the product (claims must be presented to the carrier).  
Removal or installation of the product.  
Any other cause, which does not relate to a product defect.  
Cartons, equipment enclosures, cables or accessories used in  
conjunction with the product.  
g)  
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).  
KRAMER ELECTRONICS LTD.  
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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  
Kramer’s liability for any defective 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.  
NOTICE  
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"  
"Electromagnetic compatibility (EMC) generic immunity standard.  
Part 1: Residential, commercial and light industry environment".  
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 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.  
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The list of Kramer distributors appears on our web site:  
From the web site it is also possible to e-mail factory headquarters.  
We welcome your questions, comments and feedback.  
Kramer Electronics Ltd.  
3 Am VeOlamo Street. Jerusalem 95463, Israel Tel: (972-2)-654-4000.  
Fax: (972-2)-653-5369, E-mail: [email protected]  
 

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