USER MANUAL
Contents
1. 3 unbalanced stereo audio DA To achieve the best performance e 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 e Avoid interference from neighboring electrical appliances that may adversely influence signal quality and position your Kramer VM 3A away from moisture excessive sunlight and dust No operator serviceable parts inside unit Use only the Kramer Electronics input power wall adapter that is provided with this unit Eut Disconnect power and unplug unit from wall before installing or removing device or servicing unit 1 For example model number AD2512C part number 2535 000251 Your Audio Distributor 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 LEFT RIGHT INPUT OUT 1 OUT2 OUT 3 12 VDC t f r R GL R GL R GL R GL Figure 1 VM 3A Audio Distributor Table 1 Front Panel VM 3A Audio Distributor Features Feature Function 1 LEFT LEVEL Trimmer Adjusts the left output signal level 2 RIGHT LEVEL Trimmer Adjusts the right output signal level 3 ON LED llluminates when receiving power Table 2 Rear Panel VM 3A Audio Distributor Features Feature Function2. INPUT Detachable Terminal Block Connector Connects to the audio source OUT Detachable Terminal Block Connector Connects to the audio acceptor from 1 to 3 12 VDC 12V DC connector for powering the unit o aia se 1 Insert a screwdriver into the small hole and carefully rotate it trimming the appropriate output level KRAMER SIMPLE CREATIVE TECHNOLOGY Connecting Your Audio Distributor 5 Connecting Your Audio Distributor To connect the VM 3A as illustrated in the example in Figure 2 do the following 1 Connect the balanced stereo audio source to the INPUT terminal block connector 2 Connect the OUT terminal block connectors from 1 to 3 to up to three balanced stereo audio acceptors 3 Connect the 12V DC power adapter to the power socket and connect the adapter to the mains electricity not illustrated in Figure 2 4 Ifrequired adjust LEFT and RIGHT audio signal levels Balanced Stereo Source Balanced Balanced Stereo Audio Acceptor 1 Stereo Audio Acceptor 3 Figure 2 Connecting the VM 3A Audio Distributor 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 2 You do not have to connect all the outputs 5 Technical Specifications 6 Technical Specifications Table 3 includes the technical specifications Table 3 VM 3A Audio Distributor Tech
3. Kramer Electronics Ltd l KRAMER USER MANUAL Model VM 3A Audio Distributor Contents Contents 1 Introduction 2 Getting Started 2 1 Quick Start 3 Overview 4 Your Audio Distributor 5 Connecting Your Audio Distributor 6 Technical Specifications Figures Figure 1 VM 3A Audio Distributor Figure 2 Connecting the VM 3A Audio Distributor Tables Table 1 Front Panel VM 3A Audio Distributor Features Table 2 Rear Panel VM 3A Audio Distributor Features Table 3 VM 3A Audio Distributor Technical Specifications OU A UNE pa S AB Introduction 2 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 Groups which are clearly defined by function Congratulations on purchasing your Kramer VM 3A Audio Distributor This product is ideal for the following typical applications e Audio duplication studios delivering high quality audio duplicates e Audio broadcast and production studios for signal distribution e Presentation and multimedia audio distribution e Field audio distribution The package includes the following items e VM 3A Audio Distributor e Power adapter e This user m
4. and Regulations Part 15 Radio frequency devices Subpart B Unintentional radiators CAUTION BO 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 B gt Usethe supplied DC power supply to feed power to the machine po Please use recommended interconnection cables to connect the machine to other components 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 Safety Warning Disconnect the unit from the power supply before opening servicing Caution 9001 O 32 QS al Institute of Quality amp Control Kramer Electronics Ltd Web site www kramerelectronics com E mail info kramerel com 2900 001033 REV 3
5. anual Getting Started We recommend that you e Unpack the equipment carefully and save the original box and packaging materials for possible future shipment e Review the contents of this user manual 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 Download up to date Kramer user manuals from the Internet at this URL http www kramerelectronics com 1 Getting Started 2 1 Quick Start This quick start chart summarizes the basic setup and operation Step 1 Connect the input and the outputs see section 5 Balanced Stereo Source Connect the outpute 1 Connect the input Balanced Balanced Stereo Audio Acceptor 1 Stereo Audio Acceptor 3 If required adjust the LEFT and RIGHT audio signal levele Step 2 Connect the power 2 KRAMER SIMPLE CREATIVE TECHNOLOGY Overview 3 Overview The VM 3A is a high quality 1 3 balanced stereo audio distribution amplifier It accepts one balanced stereo input and distributes the signal to three identical outputs The VM 3A e Achieves a signal output level reaching up to 20dBm e Has front panel left and right signal level trimmer controls e Can function as a 1
6. ervice 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 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
7. 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 Removalor 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 WILLNOT 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 Forthe name of the nearest Kramer authorized s
8. nical Specifications INPUT 1 balanced audio stereo 4dBm 100k on detachable terminal blocks OUTPUTS 3 balanced audio stereo 4dBm 500 on detachable terminal blocks MAX OUTPUT LEVEL 20dBm BANDWIDTH 3dB gt 100 kHz S N RATIO 87dB CONTROL Output level control 0 5dB to 8 6dB COUPLING DC AUDIO THD NOISE 0 024 POWER SOURCE 12 VDC 48mA DIMENSIONS 11 7cm x 6cm x 3 2cm 4 6 x 2 4 x 1 3 W D H WEIGHT 0 28 kg 0 62 Ibs approx ACCESSORIES Power supply OPTIONS Rack adapter 6 KRAMER SIMPLE CREATIVE TECHNOLOGY LIMITED WARRANTY Kramer Electronics hereafter Kramer warrants this product free from defects in material and workmanship under the following terms HOWLONGIS 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 WHATIS COVERED AND WHATIS 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
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