User Manual for Distribution Amplifiers - AV-iQ
Contents
1. KRAMER ELECTRONICS Ltd USER MANUAL Distribution Amplifiers Models VM 1110 VM 1610 VM 5AD VM 80A IMPORTANT Before proceeding please read paragraph entitled Unpacking and Contents KRAMER ELECTRONICS LTD Section Table AUN Table Of Contents Name INTRODUCTION A Word On Distribution Amplifiers Factors Affecting Quality of Results SPECIFICATIONS How do I Get Started UNPACKING AND CONTENTS Optional Accessories VM SERIES AMPLIFIERS Getting to Know Your VM 1110 Amplifier Getting to Know Your VM 1610 Amplifier Getting to Know Your VM 5AD Amplifier Getting To Know Your VM 80A Amplifier INSTALLATION Rack Mounting Connecting to Audio Devices USING THE VM AUDIO AMPLIFIERS Powering On the Amplifier Coupling Audio Control VM 1610 80A Only Balanced Stereo Control VM S5AD Only Using A Microphone Programming the VM 1110 and VM 1610 Programming the VM 80A Audio System Setup TAKING CARE OF YOUR AUDIO AMPLIFIER TROUBLESHOOTING Power and Indicators Audio Signal List Of Illustrations VM 1110 Front Rear Panel Features VM 1610 Front Rear Panel Features VM SAD Front Rear Panel Features VM 80A Front Rear Panel Features Audio System Setup List Of Tables VM 1110 Front Rear Panel Features VM 1610 Front Rear Panel Features VM SAD Front Rear Panel Features VM 80A Front Rear Panel Features Page OCOTCOCOCOCOCOOANDAAHHHPWNNNY OrAINN KRAMER ELECTRONICS LTD 1 1 12. allow moisture to build up Take care not to allow dust or particles to build up inside unused or open connectors KRAMER ELECTRONICS LTD l1 10 TROUBLESHOOTING NOTES 1 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 2 If the recommended actions still do not result in satisfactory operation please consult your KRAMER Dealer 10 1 Power And Indicators Problem No Power 10 2 Audio Signal Problem No audio at the output device regardless of input selected Audio level is too low Remedy 1 Remedy 1 Confirm that the rocker switch is in the ON position and that the Power lamp is illuminated Confirm that power connections are secured at the amplifier and at the receptacle Make sure the receptacle is active outputting the proper mains voltage If there is still no power check the fuse Remove power cord from the AC outlet and from the machine and then using a flat head screwdriver remove the fuse holder located directly below the power connector Confirm that the fuse is good by looking at the wire connected to the ends of the fuse If the wire is broken replace the fuse with another with the same value Confirm that your sources and output device are powered on and connected p
3. amplifier designed for studio and other demanding applications The VM 1610 has two inputs and can be programmed by the user to function as a 1 10 or as a 2 x 1 5 DA State of the art Bi Fet amplifying circuitry and a high power discrete buffering system make the VM 1610 an excellent performer All circuitry is active with no transformers thus ensuring hum free and full bandwidth operation Front rear panel features of the VM 1610 are described in Figure 2 and Table 2 NOTE For operation instructions refer to section 8 K 1 10 Balanced Audio Stereo Distributor CHANNEL 1 6 6 G G G 6 6 6 CHANNEL 2 SERIAL our our2 ours our OUTS INPUT INPUT OUT our ours our OUTS Le aia cha Rrra ATEL Reels ERS chy eRe ELS AR rL Raka ERa pin eRe cbs Ra pe delto teld EETA 46 deldoldoldo delde 6 230 VAC A ME E we Vra Gi Figure 2 VM 1610 Front Rear Panel Features Table 2 VM 1610 Front Rear Panel Features Feature 1 Illuminated power switch 2 CH 2 LEVEL Left Gain trimmer 3 CH 2 LEVEL Right Gain trimmer 4 MODE 1 10 2x1 5 selector 5 CH 1 LEVEL Left Gain trimmer 6 CH 1 LEVEL Right Gain trimmer Function Supplies power to the unit Controls the left channel audio gain the machine is factory preset for accurate 1 1 signal transparency Controls the Right ch
4. example 2 Connect the audio acceptors to the output sockets of the balanced DA 3 Use the controls of the DA if available to adjust signal levels see sections 8 3 and 8 4 for more details KRAMER ELECTRONICS LTD 10 Some useful tips gt Use two mono Das as one stereo balanced DA gt Use a dual channel DA VM 1110 for example for maximal studio flexibility gt Do not use excessively long cables if possible as signal quality may degrade rapidly Use best cables and connectors XLRs gt You may feed a balanced DA with an unbalanced signal via a Transcoder FC 4208 for example Level R Level L Bal Mic Stereo POWER Line BAL O O co Balanced Unbalanced Audio Distributor VM 5AD KRAMER INPUT OUT 1 OUT 2 sot 3 4 5 O O 230 VAC Q O 5 10 60 Hz BALANCED AUDIO SOURCE F UP TO 5 ACCEPTORS Figure 5 Audio System Setup 9 TAKING CARE OF YOUR AUDIO AMPLIFIER Do not locate your amplifier in an environment where it is susceptible to dust or moisture These may damage the electronics and cause erratic operation or failure Do not locate your amplifier where temperature and humidity may be excessive Do not clean your amplifier with abrasives or strong cleaners Doing so may remove or damage the finish or may
5. one source with no discernible signal degradation They vary in the number of inputs programming capability number of outputs and operating format A good quality distribution amplifier amplifies the incoming signal pre compensates 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 distribution amplifier for correction and fine tuning of the source signal before multiplication so that all outputs are corrected in the same way Factors Affecting Quality of Results There are many factors affecting the quality of results when signals are transmitted from a source to an acceptor gt Connection cables Low quality cables are susceptible to interference they degrade signal quality and cause elevated noise levels They should therefore be of the best quality gt Sockets and connectors of the sources and acceptors So often ignored they should be of highest quality since Zero Ohm connection resistance is the target Sockets and connectors also must match the required impedance 75 ohms in video Cheap low quality connectors tend to rust thus causing breaks in the signal path gt Amplifying circuitry Must have quality performance when the desired end result is high linearity low distortion and low noise operation gt Distance between sources and acceptors Plays a majo
6. product at our option Kramer shall not be liable for y 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 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 y 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 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 gt Any user who makes changes or modifications to the unit without the express approval of the manufacturer will void user authority to operate the equipment gt Use the supplied AC power cord when applicable to supply power to t
7. 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 focus on the relevant sections 4 UNPACKING AND CONTENTS The items contained in your Kramer VM amplifier package are listed below Please save the original box and packaging materials for possible future transportation and shipment of the amplifier Amplifier AC power cable User manual Rubber feet Kramer concise product catalog VVVVV 4 1 Optional Accessories The following Kramer accessories can enhance implementation of your amplifier gt Rack Adapter Used to install smaller size machines in a standard 1U rack One or more machines may be installed on each adapter gt SP 4200 Audio ProcAmp can be serially connected between a VM amplifier and the audio source for noise reduction sound improvement The machine provides full stereo signal processing as follows Noise Reduction by up to 25dB from any source without sonic artifacts downward audio expansion dynamically adjusting adaptive threshold for all level operation effective Dolby B decoding AGC operation and level transcoding FC 4208 Balanced Unbalanced Audio Transcoder can be serially connected between a VM amplifier and the audio source for audio conversion of different formats The machine is a bi directional Transcoder between two popular audio formats It allo
8. 1 2 INTRODUCTION Congratulations on your purchase of this Kramer Electronics 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 amplifiers such as the one you have just purchased Kramer also offers a full line of high quality switchers processors interfaces controllers and computer related products This manual includes configuration operation and information for the following products from the Kramer VM line of distribution amplifiers All these VM amplifiers are similar in operation and features gt VM 1110 1 10 Balanced Mono or 2x5 Stereo Audio Distributor gt VM 1610 1 10 or 2x1 5 Balanced Stereo Audio Distributor gt VM 5AD 1 5 Balanced Mono Unbalanced Stereo Audio Distributor gt VM 80A 1 8 or 2x 1 4 Balanced Stereo Audio Distributor A Word On Distribution Amplifiers Distribution amplifiers are used to distribute one source to several acceptors for simultaneous recording or monitoring of
9. 5 operating mode switches to select the desired mode of operation 5 When in stereo mode connect each channel to the appropriate inputs and outputs and select 2x1 5 mode of operation Programming The VM 80A The VM 80A mode of operation can be selected by pressing one of the 1 8 2x1 4 operating mode switches These programming switches illuminate as the selection is made and function as follows gt 1 8 position splits channel 1 input to all 8 outputs channels 1 amp 2 when pressed gt 2x1 4 position splits channels 1 amp 2 inputs to output channels 1 amp 2 respectively when pressed 1 Connect a balanced stereo audio source to the terminal blocks located on the rear panel of the machine using the appropriate cables and connectors and noting the correct polarity of the input signal 2 Connect up to 8 acceptors to the output sockets using the appropriate cables and connectors and noting the correct polarity 3 Operate source acceptors and the VM 80A 4 Use the 1 8 or the 2x1 4 operating mode switches to select the desired mode of operation Audio System Setup In broadcast and in high quality industrial studios audio signals are of the balanced type In order to distribute balanced audio signals a balanced audio source is needed Figure 5 illustrates a typical usage of a balanced audio amplifier Perform the following steps if necessary 1 Connect the audio source to the balanced audio DA VM 5AD for
10. annel audio gain the machine is factory preset for accurate 1 1 signal transparency gt 1 10 released Splits channel 1 input to all 10 outputs gt 2x1 5 pressed Splits channel 1 and channel 2 to outputs 1 5 of channels 1 and 2 respectively Controls the left channel audio gain the machine is factory preset for accurate 1 1 signal transparency Controls the Right channel audio gain the machine is factory preset for accurate 1 1 signal transparency 7 CHANNEL 1 OUT 1 5 L R terminal block connector 8 CHANNEL 1 INPUT L R terminal block connector 5 amplified and buffered audio outputs Stereo audio balanced input 9 CHANNEL 2 INPUT L R terminal block connector 10 CHANNEL 2 OUT 1 5 L R terminal block connector Stereo audio balanced input 5 amplified and buffered audio outputs 11 A 3 prong power connector fuse A 3 prong AC connector allows power to be supplied to the unit Directly underneath this connector a fuse holder houses the appropriate fuse KRAMER ELECTRONICS LTD 5 3 Getting to Know Your VM 5AD Amplifier The KRAMER VM SAD is a full spec state of the art 1 5 balanced audio distribution amplifier designed for studio and other demanding applications The VM 5AD splits a single input source either mono balanced or stereo unbalanced into five identical outputs without any discernible signal degradation The VM 5AD has an audi
11. eiving end there is a differential amplifier which amplifies only the difference between the antiphase signals thus canceling noise which is picked up along the way The balanced system is usually used either when very low signals are to be transmitted over long distances such as those generated from high quality microphones or at broadcast audio studios for highest quality signal recreation To enable stereo audio control select the Stereo position by pressing the Stereo BAL pushbutton to the In position Then gently adjust the Level R Level L Gain knobs to control the appropriate channel audio gain for satisfactory audio level To enable balanced audio level control select BAL position by releasing the Stereo BAL pushbutton to the Out position Then using the LEVEL L BAL knob gently adjust the audio stereo level for satisfactory audio level KRAMER ELECTRONICS LTD 8 4 1 Using A Microphone 8 5 8 6 8 7 A microphone is a device which converts sound waves to electrical impulses High quality microphones usually generate a very low signal level Low noise high fidelity pre amplification is required to boost the output of a microphone before the signal reaches the main audio amplifier where it is processed as a regular audio signal Pre amplifying low level microphone signals is achieved by precise matching of microphone impedance and use of low noise electronic amplifying devices In order to obtain the highest qual
12. hbutton 1 Should be pressed Mic position whenever microphone is used 2 Should be released Line position for normal operation no microphone Stereo BAL pushbutton 1 Enables stereo signal and should be pressed Stereo position when a stereo signal is applied to the input 2 Enables balanced signal and should be released Bal position when a balanced signal is applied to the input XLR INPUT female connector Audio input XLR OUT1 OUTS male connectors 5 amplified and buffered audio outputs 3 prong power connector fuse A 3 prong AC connector allows power to be supplied to the unit Directly underneath this connector a fuse holder houses the appropriate fuse KRAMER ELECTRONICS LTD 5 4 Getting To Know Your VM 80A Amplifier The KRAMER VM 80A is a Broadcast quality state of the art balanced stereo audio distribution amplifier designed for demanding applications such as broadcast and production studios The VM 80A has two balanced stereo audio inputs each splitting the input source into four identical outputs The VM 80A can function as a 1 8 DA or as two 1 4 DAs It has trimmers on the front panel to fine tune levels of each channel individually Units in the 80 series come in a convenient compact size enclosure Any two units fit side by side in a 19 rack using a special 1U rack adapter To achieve a larger distribution system the inputs of several machines may be looped by a
13. he machine and controllers gt Please use recommended interconnect cables to connect the machine to controllers and other components KRAMER ELECTRONICS LTD 15 For the latest information on our products and a list of Kramer distributors visit our Web site www kramerelectronics com Updates to this user manual may be found at http www kramerelectronics com manuals html We welcome your questions comments and feedback 001 o E o O Gi Toc jg Institute of lQuality amp Control O S PA lg Quality gt Kramer Electronics Ltd Web site www kramerelectronics com E mail info kramerel com P N 2900 001002 REV 2
14. ity output signal from a microphone its internal impedance should be matched to that of a pre amplifier with exactly the same input impedance Microphone impedance may vary from a few ohms to several mega ohms When a microphone is used not used perform the following steps 1 Press the Mic Line pushbutton located at the front of the machine to switch to Mic position This is done in order to compensate for microphone low input level 2 Release Mic Line pushbutton no microphone in normal operation Line position Programming The VM 1110 and VM 1610 The mode of operation programming is selected by activating one of the 1 10 2x1 5 operating mode switches These programming switches illuminate as the selection is made and function as follows gt 1 10 position splits channel 1 Input VM 1610 or input A VM 1110 to all 10 outputs gt 2x1 5 position splits channel 1 and channel 2 inputs to outputs 1 5 of channels 1 and 2 respectively VM 1610 Or Splits input A and input B to outputs 1A 5A and 1B 5B respectively VM 1110 1 Connect a balanced audio source to the input sockets located on the rear panel of the machine using the appropriate cables and connectors and noting the correct polarity of the input signal 2 Connect up to 10 acceptors to the output sockets using the appropriate cables and connectors 3 Operate source acceptors and the VM 1110 1610 4 Use the 1 10 2x1
15. nector connectors connectors connectors connectors Output Level 4dBm SO0ohm Up to Up to 20Vpp S0ohm 4dBm 490hm 24dBm 50ohm Output AC AC AC AC Coupling Audio S N Ratio gt 95dB 1 Vpp gt 92dB 1Vpp gt 88dB 1Vpp 100dB 1Vpp Audio 10 100kHz 3dB 10 100kHz 3dB 10 80kHz 3dB 10 20kHz 1dB Bandwidth Channel 60dB 60dB gt 60dB 65dB Matching Max audio gt 20Vpp 26V pp 20Vpp 20Vpp Output Audio THD lt 0 1 at 1kHz lt 0 011 at 1kHz 0 011 at kHz lt 0 02 at 1kHz Gain Range 0 5 to 9 4dB 0 5dB to 9 5dB 15 5dB to 35 6dB 0 2 to 5 8dB Crosstalk 62dB 84 5dB NA 60dB Controls Front selector Front panel selectors Front panel Front panel selectors switches for 1 10 or for 1 10 or 2x1 5 stereo balance and for 1 8 2x1 4 2x1 5 operation operation 4 trimmers Mic line pushbuttons operation 4 front two for each input accessible balanced channel gain trimmers Dimensions 48 3 x 17 8 x 48 3 x 17 8 x 24 5 x 18 x 4 5 cm 22 x 18 x 4 5 cm W D H 4 5 cm 4 5 cm 9 6 x 7 x 1 8 8 7 x7 x 1 8 19 x7 x 1U 19 x7 x 1U Weight 2 5 kg 5 5 lbs 2 6 kg 5 7 lbs 1 2kg 2 7 lbs 1 2kg 2 7 lbs Power Consumption Power Source Approx 230 115VAC 50 60Hz 115V U S A Approx 230 115VAC 50 60Hz 115V U S A Approx 230 115VAC 50 60Hz 115V U S A Approx 230 115VAC 50 60Hz 115V U S A KRAMER ELECTRONICS LTD 3 HOW DOI GET STARTED The fastest way
16. o level control knobs to change balanced or unbalanced audio signal levels it can accept microphone input level balanced mono or unbalanced stereo amplifying it to a line level signal The VM 5AD allows easy conversion between balanced and unbalanced signals for maximal flexibility in studios All circuitry is active with no transformers thus ensuring hum free full bandwidth operation The VM 5AD may be used to convert balanced signal levels and unbalanced signal levels in both directions using the level knobs A microphone signal balanced unbalanced may be converted to a standard 4dBm balanced level Front rear panel features of the VM SAD are described in Figure 3 and Table 3 NOTE For operation instructions refer to section 8 Ce a Level R Level L Bal Mic Stereo POWER Line _BAL O TEE Balanced Unbalanced Audio Distributor VM 5AD OUT 4 OUT 5 3 OQ OK wnt 5 p Figure 3 VM 5AD Front Rear Panel Features Table 3 VM 5AD Front Rear Panel Features Feature Function Illuminated Power Switch Supplies power to the unit LEVEL R knob Adjusts right stereo audio level when Stereo BAL pushbutton is in Stereo position LEVEL L BAL knob 1 Adjusts left stereo audio level when Stereo BAL pushbutton is in Stereo position 2 Adjusts balanced audio level when Stereo BAL is in BAL position Mic Line pus
17. parallel connection For signal enhancement and noise reduction an audio signal processor may be inserted Front rear panel features of the VM 80A are described in Figure 4 and Table 4 NOTE For operation instructions refer to sections 8 1 8 6 OO POWER MODE CH 2 LEVEL of LEVEL KRAMER O Q O 7 1 8 2x 1 4 Left Right Left Right 1 8 Audio Distributor VM 80A CH1IN CH 2 IN Bai 0 R L R L R L R R L k 0 0 G G G G G G G G G G G lol CH GEEREG REEE A sae _ FUSE OUTPUTS O Figure 4 VM 80A Front Rear Panel Features Table 4 VM 80A Front Rear Panel Features No Feature Illuminated Power Switch Function Supplies power to the unit 1 8 operating mode touch switch Illuminated when pressed 2x1 4 operating mode touch switch Illuminated when pressed CH2 LEVEL Left trimmer CH 2 LEVEL Right trimmer Splits channel 1 input to all 8 outputs channels 1 amp 2 when pressed Splits channels 1 amp 2 inputs to output channels 1 amp 2 respectively when pressed Controls Channel 2 left audio gain Controls Channel 2 Right audio gain CH 1 LEVEL Left trimmer Controls Channel 1 left audio gain CH 1 LEVEL Right trimmer CH 1 IN L R terminal block connecto
18. r CH 2 IN L R terminal block connector 10 CH 2 1 OUTPUTS L R terminal block connectors CH 1 OUTPUTS L R terminal block connectors 12 Power Connector J Controls Channel 1 Right audio gain Stereo audio balanced input Stereo audio balanced input Amplified and buffered audio outputs Amplified and buffered audio outputs A 3 prong AC connector allows power to be supplied to the unit Directly underneath this connector a fuse holder houses the appropriate fuse KRAMER ELECTRONICS LTD 6 6 1 8 1 8 2 8 3 8 4 INSTALLATION Rack Mounting The VM 1110 and VM 1610 amplifiers may be rack mounted in a standard 19 EIA rack assembly and include rack ears at the ends of the front panel Each of these devices uses one unit 1U of rack height 1 75 and does not require any specific spacing above or below the unit for ventilation To mount these amplifiers simply place the unit against the rails of your rack and insert standard screws through each of the four corner holes in the rack ears The VM 80A and VM 5AD amplifiers require a special see section 4 1 rack adapter contact your KRAMER dealer to be mounted in the 1U rack For installation of the VM 80A and VM 5AD follow the instructions in the installation guide enclosed with the adapter CONNECTING TO AUDIO DEVICES Audio sources and output devices such as amplifiers or recorders may be connected to the amplifier th
19. r role in the final result For long distances over 15 meters between sources and acceptors special measures should be taken in order to avoid cable losses These include using higher quality cables or adding line amplifiers gt Interference from neighboring electrical appliances These can have an adverse effect on signal quality Balanced audio lines are less prone to interference but unbalanced audio should be installed far from any mains power cables electric motors transmitters etc even when the cables are shielded KRAMER ELECTRONICS LTD 2 SPECIFICATIONS VM 1110 VM 1610 VM 5AD VM 80A Configuration 1 10 or 2x1 5 1 10 or 2x1 5 1 5 1 8 or 2x1 4 Input Type 2 balanced audio 2 stereo balanced 1 audio balanced 2 stereo audio balanced audio mono or unbalanced stereo MIC state 1 balanced mono Mic or unbalanced stereo Mic 5mV 10kohm Input Female XLR Terminal block Female XLR Terminal block Connections connectors connectors connectors connectors Input Level 4dBm 50kohm Up to Up to 4dBm 100kohm 24dBm 50Kohm 18Vpp SOKohm MIC state 5m V 10kohm Output Type 10 balanced audio 10 or 2x5 stereo 5 mono balanced or _ 8 or 2 x 4 stereo 5 stereo balanced balanced audio stereo unbalanced balanced audio audio audio Output Male XLR Terminal block Male XLR Terminal block Con
20. roperly Audio signals connected to the input of your amplifier should be properly wired to the output of your source Audio signals connected to the output of your amplifier should be properly wired to the input of your amplifier or recorder Confirm that any other amplifiers in the signal path have the proper input and or output selected Confirm that the connecting cables are of high quality and properly built Take special care in noting the wiring configuration of balanced to unbalanced cables Verify that both of the antiphase wires of the balanced audio inputs and outputs are properly connected Check level controls located on your source input device or output display or recorder KRAMER ELECTRONICS LTD 12 Problem Remedy Low frequency hum in 60Hz hum ground loop is caused by a difference in the ground the output signal potential of any two or more devices connected to your signal path This difference is compensated by passing that voltage difference through any available interconnection including your audio cables WARNING DO NOT DISCONNECT THE GROUND FROM ANY PIECE OF AUDIO EQUIPMENT IN YOUR SIGNAL PATH Check the following to remove ground loops 1 Confirm that all interconnected equipment is connected to the same phase of power if possible 2 Remove equipment connected to that phase that may introduce noise such as motors generators etc 3 Disconnect all cables and reconnect them one at a time
21. rough the female XLR type connectors VM 1110 and VM 5AD models or through terminal block type connectors VM 1610 and VM 80A models located at the back of the machine USING THE VM AUDIO AMPLIFIERS Powering On The Amplifier NOTES 1l The amplifier should only be powered on after all connections are completed and all source devices have been powered on Do not attempt to connect or disconnect any audio or control signals to the amplifier while it is powered on 2 The socket outlet should be near the equipment and should be easily accessible To fully disconnect equipment remove power cord from its socket after turning it off 1 Press the toggle switch on the far left of the front panel to the up position The toggle switch illuminates and the configuration button illuminates as well where applicable 2 Operate the acceptors Coupling The coupling implemented in the amplifiers described in this manual is AC Audio Control VM 1610 80A Only Using a flat screwdriver gently adjust the GAIN trimmers of the appropriate RIGHT or LEFT channels located at the front of the machine for satisfactory audio level Balanced Stereo Control VM 5AD Only Balanced audio is a signal that is divided into two antiphase signals traveling on two wires and sometimes with a third a ground reference wire Transmitting a balanced signal achieves a better signal to noise ratio and the signal is more immune to noise and interference On the rec
22. tion 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 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 For the name of the nearest Kramer authorized service center consult your authorized dealer KRAMER ELECTRONICS LTD 14 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
23. until the ground loop reappears Disconnect the affected cable and replace or insert an isolation device opto isolator or transformer in the signal path KRAMER ELECTRONICS LTD 13 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 year 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 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 installa
24. ws gain or attenuation while transcoding to compensate for the 14dB change between IHF audio levels and the newly adopted balanced DAT input levels Very low noise and distortion components are used throughout v KRAMER ELECTRONICS LTD 5 VM SERIES AMPLIFIERS This section describes all the controls and connections of your amplifier Understanding all of the controls and connections helps you realize its full power 5 1 Getting to Know Your VM 1110 Amplifier The KRAMER VM 1110 is a full spec state of the art 1 10 balanced audio distribution amplifier designed for studio and other demanding applications The VM 1110 splits the input source into ten identical outputs with no discernible signal degradation The VM 1110 has two inputs and can be programmed by the user to function as a 1 10 Mono DA or as a 2 x 1 5 stereo DA State of the art Bi Fet amplifying circuitry and a high power discrete buffering system make the VM 1110 an excellent performer All circuitry is active with no transformers thus ensuring hum free full bandwidth operation The VM 1110 may also be used to distribute unbalanced signals using an appropriate adapter and grounding the negative polarity signal Two VM 1110 machines can be used for 1 10 stereo operation in conjunction with the KRAMER VM 1010 used for video Front rear panel features of the VM 1110 are described in Figure 1 and Table 1 NOTE For operation instructions refer to section 8 1 10 2
25. x15 K Balanced Audio Distributor VM 1110 SERIAL 230 VAC 50 60 Hz FUSE o OUT o 3A o OUT o B o OUT o 4A o o INPUTA OO Figure 1 VM 1110 Front Rear Panel Features o J INPUT B o o OUT 1A o OUT o 1B o OUT 2 o A o OUT o 2B o OUT 4B o o OUT5A OUT 5B Table 1 VM 1110 Front Rear Panel Features Feature 1 Illuminated power switch Mode 1 10 pushbutton Illuminates when pushed 3 Mode 2 x1 5 pushbutton lluminates when pushed XLR INPUT A female connector Function Supplies power to the unit Splits input A to all 10 outputs when pressed Splits inputs A and B to outputs 1A 5A and 1B 5B respectively when pressed Audio input XLR INPUT B female connector XLR OUT 1A 5A male connectors XLR OUT 1B 5B male connectors A 3 prong power connector fuse ALAA A Audio input 5 amplified and buffered audio outputs 5 amplified and buffered audio outputs A 3 prong AC connector allows power to be supplied to the unit Directly underneath this connector a fuse holder houses the appropriate fuse KRAMER ELECTRONICS LTD 5 2 Getting to Know Your VM 1610 Amplifier The KRAMER VM 1610 is a full spec state of the art 1 10 balanced stereo audio distribution
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