Kramer Electronics 4X4A
Contents
1. machine is not designed to cope directly with microphone level signals Those signals should be pre amplified first to line level signals prior the connection to the 4x4A KRAMER ELECTRONICS LTD 9 KRAMER 11 TECHNICAL SPECIFICATIONS INPUTS OUTPUTS AUDIO BANDWIDTH THD 1kHz 2 HARMONIC MAX OUTPUT LEVEL S N RATIO CROSSTALK POWER SOURCE DIMENSIONS WEIGHT ACCESSORIES OPTIONS Four Stereo Audio 1 Vpp 33kQ typical up to 5 2Vpp Four Stereo Audio 1 Vpp 220 Q typical up to 5 2Vpp Max on 3 5mm mini phone connectors 100 kHz 3dB Less than 0 018 Less than 0 002 5 2 Vpp 7dBm Better than 90 dB 79 dB 1kHz 12 VDC 20 mA 12cm x 7 5cm x 2 5cm 4 7 x 2 95 x 0 98 W D H 0 28 kg 0 62 Ibs Approx Power supply mounting brackets 19 rack adapter for 1 or 3 machines model VA 50P power supply for six 12VDC powered units KRAMER ELECTRONICS LTD 10 KRAMER 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 wa2. KRAMER Kramer Electronics Ltd USER MANUAL 4x1 Audio Switcher Distributor Model 4x4A IMPORTANT Before proceeding please read paragraph entitled Unpacking and Contents KRAMER ELECTRONICS LTD KRAMER Section 1 1 1 1 2 1 3 2 3 3 1 4 4 1 5 5 1 6 7 TA 7 2 8 9 10 10 1 10 2 11 Figure Table Table Of Contents Name INTRODUCTION A Word on Video Audio Switchers A Word on Distribution Amplifiers Computer and Presentation Audio Related Problems HOW DO I GET STARTED UNPACKING AND CONTENTS Optional Accessories 4X4A AUDIO SWITCHER DISTRIBUTOR Getting to Know your 4x4A INSTALLATION Rack Mounting CONNECTING TO AUDIO DEVICES USING THE MACHINE Turning On the Machine Operation TYPICAL APPLICATIONS TAKING CARE OF YOUR MACHINE TROUBLESHOOTING Power and Indicators Audio Signal TECHNICAL SPECIFICATIONS Limited Warranty List Of Illustrations Description 4x4A Front Rear Panel Features List Of Tables Description 4x4A Front Rear Panel Features KRAMER ELECTRONICS LTD 1 5 D ye OOOO DWDWAAIAIAIAIANADAAPAAHRWWNN j Page Page KRAMER 1 INTRODUCTION Congratulations on your purchase of this Kramer Electronics Audio Switcher Distributor 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 aroun
3. btained 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 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 D gt Servicing the machines can only be done by an authorized Kramer technician Any user who makes changes or modifications to the unit wthout the expressed approval of the manufacturer will void user authority to operate the equipment Use the DC power supply included to power the machine Please use recommended interconnection cables to connect the machine to other components B gt B gt KRAMER ELECTRONICS LTD 12 KRAMER KRAMER The list of Kramer distributors appears on our web site www kramerelectronics com 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 kramerel netvision net il
4. cer in a rugged compact desktop unit It accepts one unbalanced line level stereo input via RCA connectors and provides one set of unbalanced stereo outputs on RCA connectors as well as one set of balanced stereo outputs on XLRs The separate L R GAIN controls affect only the balanced stereo outputs The VOLUME and AUTO LEVEL controls which comprise the LEVEL PROCESS are engaged when the LEVEL PROCESS button is turned on and otherwise they are bypassed Depending on front panel settings the SP 4200 can provide true stereo signal processing including noise reduction by up to 25 dB without sonic artifacts downward audio expansion dynamic adjustment adaptive threshold for all level operation effective Dolby B decoding AGC operation and level transcoding VS 81A to add more sources to switch from The Kramer VS 81A is a high quality mechanical 8x1 switcher for stereo audio using RCA connectors It is designed for applications requiring a compact desktop unit for routing stereo audio signals High quality switching components provide excellent isolation between inputs The VS 81A is extremely rugged and dependable Its unpowered passive design can be an advantage in applications where various regulatory compliance would otherwise be KRAMER ELECTRONICS LTD 5 KRAMER required The hard wire passive signal path can also switch other signal formats 4 4X4A AUDIO SWITCHER DISTRIBUTOR This section describes the controls and con
5. clean undisturbed picture transitions The switched sources should be genlocked Matrices and switchers may sometimes be RS 232 or RS 485 422 controlled Each of these options is a way of remotely controlling a video audio device switcher etc using a PC with a serial port or another device that uses a similar communication protocol The simplest connection between the RS 232 controller and the controlled device uses two wires TRANSMIT RECEIVE and a common ground wire Finally wide video bandwidth permits these matrix switchers to be used in the most demanding applications There are many factors effecting signal quality when it is transmitted from a source to an acceptor gt 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 KRAMER ELECTRONICS LTD 2 KRAMER gt 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 gt Sockets and connectors of the sources and acceptors so often ignored should be of best quality as Zero Ohm connection resistance should be assured Cheap connectors tend to rust causing breaks in the signal path gt Amplifying circuitry quality is extremely im
6. d 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 product you have just purchased Kramer also offers a full line of high quality distribution amplifiers switchers processors interfaces controllers and computer related products This manual includes configuration operation and option information for the 4x4A 1 1 A Word on Video Audio Switchers A video audio switcher usually switches between several sources inputs and one or more acceptors outputs A switcher that allows several inputs to be connected to several outputs simultaneously is called a matrix switcher Switchers may be of the electronic or mechanical type Most matrices are of the active electronic type with many crosspoints Vertical Interval Switching frequently used in video ensures that the transition from one video source to another such as switching between two genlocked cameras is smooth and without interference The switching and changeover is done during the blanked vertical interval period when the transition is hidden from the eye Vertical Interval Switching is needed when recording or transmitting a video program involving several video sources as in live broadcast to ensure
7. e front panel of the machine Adjust if necessary audio output levels using the LEVEL knob This knob effects all outputs simultaneously In emergency cases the 4x1A may be operated using a 9 Volt battery as power source which will last for several hours TYPICAL APPLICATION A typical application is a presentation session When a presentation session has several audio sources do the following gt gt 9 Connect all needed audio sources amplified microphone line level sources etc to the 4x4A Connect all the needed audio acceptors projector receiver amplifier recorder etc Turn on all sources and acceptors and turn on the 4x4A Adjust output level if necessary using the LEVEL button 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 KRAMER ELECTRONICS LTD 8 KRAMER 10 TROUBLESHOOTING NOTES Please note that if the output signal is disturbed or interrupted by ve
8. ice 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 11 KRAMER 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 aparticular 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 dher rights which vary from place to place NOTE All products returned to Kramer for service must have prior approval This may be o
9. nections of your Audio Switcher Distributor Understanding the controls and connections helps you realize the full power of your machine 4 1 Getting to Know Your 4x4A The Kramer 4x4A is a simple high quality 4x1 Stereo Audio switcher and 1 4 distribution amplifier It accepts four stereo audio inputs and distributes the selected input to 4 outputs The machine uses 3 5 mm mini phone connectors and is therefore perfectly suitable for PC originated multimedia and presentation applications A 12V power supply is provided but the optional VA 50P can power up to six Kramer devices requiring 12VDC The 4x4A is part of the Kramer TOOLS family of compact high quality and cost effective solutions for a variety of applications oe 1 2 3 4 1 2 3 4 OUTPUTS INPUTS ____ KRAMER FOOLS KRAMER 4 Inputs Audio Switcher DA 4x4A LEVEL INPUT SELECTOR ON 12V DC z J o 6 o Figure 1 4x4A Front Rear Panel Features KRAMER ELECTRONICS LTD 6 KRAMER Table 1 VS 33V Front Rear Panel Features Feature Function O Input Selector Switches Select 1 of 4 Stereo Audio inputs for amplification and distribution 5 ON Led Power indicator glows when power is supplied to the machine 12VDC feed connector A DC connector that allows power to be supplied to the unit 5 INSTALLATION 5 1 Rack Mounting The Kramer 4x4A may be rack mo
10. portant and should posses high linearity low distortion and low noise operation gt 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 gt 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 gt 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 1 2 A Word on Distribution Amplifiers The Audio Distributor feature of the 4x4A distributes one signal to four users Signal distributors in general vary in the number of outputs operating format and bandwidth Video Audio Distributors are used to distribute one source to several acceptors monitors audio devices etc for simultaneous recording or monitoring of one source preferably with no discernible signal degradation A good quality distributor amplifies the incoming signal pre compensates
11. rranty 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 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 Repair or attempted repair by anyone not authorized by Kramer d Any shipment of the product claims must be presented to the carrier e Removal or installation of the product f Any other cause which does not relate to a product defect g 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 setup 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 serv
12. ry 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 0 1 Power and Indicators No Power 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 s cover 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 Install cover and tighten the Philips screws 10 2 Audio Signal No Audio at the Confirm that your source and output devices are turned on output device and connected properly The input of your machine should be of an identical signal format to the output of your source stereo or mono Confirm that any other device in the signal path has the proper input and or output selected Audio level is too Confirm that the connecting cables are of high quality and high or too low properly inserted Check level controls located on your source input device or output display Adjust if necessary audio output levels using the LEVEL control button Bear in mind that the
13. the signal for potential losses resulting from the use of long cables noisy source etc and generates several identical buffered and amplified outputs Often a signal processor is inserted between the source and the distributor for correction and fine tuning of the source signal before multiplication so that all copies are corrected in the same way 1 3 Computer and Presentation Audio related problems Personal computers have built in audio cards that output music speech and other sound generated in computers Multimedia and presentation sessions use this sound and other audio sources as well from VCRs microphones receivers KRAMER ELECTRONICS LTD 3 KRAMER etc Selecting between those sources in a live presentation can become a serious problem Another problem in such applications is that a sound card or any other audio source usually has only one output and in many circumstances more outputs are needed The Kramer 4x4A provides a perfect solution to those problems having 4 stereo inputs to selects from and a built in distribution amplifier with 4 individual outputs In addition the machine allows for audio level control of the selected source for level correction and fine tuning 2 HOW DOI 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 sec
14. tion doesn t apply to you you don t have to spend your time reading it 3 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 Switcher DA 4x4A User Manual DC Power Supply Kramer Concise Product Catalog 4 Rubber Feet Mounting Brackets 3 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 gt Rack Adapter Used to adapt smaller machines to a standard 1U or 3U rack Three machines can be installed in a 1U adapter and up to eight machines Kramer Tools may be installed in a 3U rack space gt 482 Balanced Unbalanced Stereo Audio Transcoder for interfacing with professional balanced audio sources and acceptors The 482 is a bi directional versatile tool converting between balanced and unbalanced stereo the two most commonly used audio standards The machine allows gain or attenuation while transcoding to compensate for the 14 dB change between IHF audio levels and the newly adopted balanced DAT input levels Very low noise and distortion components are used throughout The 482 has an unbalanced stereo audio input and a balanced stereo output and KRAMER ELECTRONICS LTD 4 KRAMER in the second channel a balanced stereo audio inp
15. unted in a standard 19 EIA rack assembly using a special Adapter see section 3 1 To mount the machine follow the installation instructions enclosed with the rack mount adapter It can be also table mounted using the brackets provided The device does not require any specific spacing above or below the unit for ventilation 6 CONNECTING TO AUDIO DEVICES Audio sources and output devices such as audio amplifiers and monitors projectors or recorders may be connected to the machine through the 3 5 mm mini plug connectors located on the back panel 7 USING THE MACHINE 7 1 Turning On the Machine 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 signal 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 7 KRAMER 7 2 8 Operation Connect up to four audio sources to the INPUT sockets of the 4x4A machine Use best available cables for connection Connect up to four audio acceptors to the OUTPUT sockets of the machine Connect an appropriate 12VDC source to the DC socket of the 4x4A machine Observe polarity The power LED will light Operate sources and acceptor s Select the appropriate source by pressing one of the selector switches on th
16. ut and an unbalanced stereo output Both channels function independently of the other Although fed from an external 12VDC source wall transformer battery belt car battery etc the machine generates internally a high voltage DC supply and is therefore capable of outputting high level signals as required for the most demanding applications The 482 is part of the Kramer TOOLS family of compact high quality and cost effective solutions for a variety of applications gt FC 4208 for interfacing with professional audio equipment The Kramer FC 4208 is a high quality format converter designed to transcode between balanced and unbalanced audio signals A total of eight channels are provided and all operate simultaneously The first four channels convert balanced signals on XLR connectors to the unbalanced format on RCA connectors and the second four channels operate in the opposite direction converting unbalanced signals to the balanced format The FC 4208 provides a cut boost control for each channel which allows the user to set optimum output levels Very low noise and distortion components are used throughout It is rugged dependable and is housed in a professional 19 rack mountable enclosure requiring one vertical space gt SP 4200 for audio processing and noise reduction The machine is a unique audio processor which combines the functions of a preamp audio dynamics processor unbalanced to balanced converter and noise redu
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