Kramer Electronics VA-4 User's Manual
Contents
1. Fass ai pos ZE a je rones as es pas roen LED Hex Codes LIMITED WARRANTY The warranty obligations of Kramer Electronics for this product are limited to the terms set forth below Whatis Covered This limited warranty covers defects in materials and workmanship in this product What is Not Covered This limited warranty does not cover any damage deterioration or malfunction resulting from any alteration modification improper or unreasonable use or maintenance misuse abuse accident neglect exposure to excess moisture fire improper packing and shipping such claims must be presented to the carrier lightning power surges or other acts of nature This limited warranty does not cover any damage deterioration or malfunction resulting from the installation or removal of this product from any installation any unauthorized tampering with this product any repairs attempted by anyone unauthorized by Kramer Electronics to make such repairs or any other cause which does not relate directly to a defect in materials and or workmanship of this product This limited warranty does not cover cartons equipment enclosures cables or accessories used in conjunction with this product Without limiting any other exclusion herein Kramer Electronics does not warrant that the product covered hereby including without limitation the technology and or integrat2. 14 9 61 16 81 e9 81 14 7 60 16 81 ea 81 14 5 16 81 eb 81 14 2 58 16 81 ec 81 14 0 57 16 81 ed 81 13 7 16 81 ee 81 13 5 55 16 81 ef 81 7 j A 4 wj N 16 81 b2 81 16 81 b3 81 16 81 b4 81 16 81 b5 81 16 81 b6 81 16 81 b7 81 A N wj N o o N Protocol 2000 VA A 4 VA 4 Hex Codes for Gain Control Amplification Gain dB LED Hex Codes jo o 3f 80 81 81 16 81 a6 81 3f 80 81 81 16 81 a7 81 3f 80 81 81 16 81 a8 81 3f 80 81 81 16 81 a9 81 3f 80 81 81 16 81 aa 81 3f 80 81 81 16 81 ab 81 1 5 je 3f 80 81 81 16 81 ac 81 3f 80 81 81 16 81 ad 81 20 je 3f 80 81 81 16 81 ae 81 22 j9 3f 80 81 81 16 81 af 81 3f 80 81 81 16 81 b0 81 27 11 3f 80 81 81 16 81 b1 81 3f 80 81 81 16 81 b2 81 3f 80 81 81 16 81 b3 81 34 14 13 80 81 81 16 81 b4 81 37 15 3f 80 81 81 16 81 b5 81 39 fie 3 80 81 81 16 81 b6 81 42 117 3f 80 81 81 16 81 b7 81 44 18 3f 8081811681881 CEE mos fe pos fe 4 155 5 78 25 z 23 zi 3 35 2 Protocol 2000 Gain dB 9 ma je per os mao sever KE 7 e2 e EZME fe aoee BT e2 65 0 81 81 16 61 5 61 67 e ar a0 61 a1 76 at ea er es 60 380 81 81 16 81 ob 1 para 70 ea o romene EME pas 7 mee
3. Dual Channel Balanced Stereo Audio Amplifier Figure 4 Crossed Cable RS 232 Connection Figure 5 Straight Cable RS 232 Connection with a Null Modem Adapter OoN ARA ONNN O Introduction Welcome to Kramer Electronics Since 1981 Kramer Electronics has been providing a world of unique creative and affordable solutions to the vast range of problems that confront video audio presentation and broadcasting professionals on a daily basis In recent years we have redesigned and upgraded most of our line making the best even better Our 1 000 plus different models now appear in 11 groups that are clearly defined by function GROUP 1 Distribution Amplifiers GROUP 2 Switchers and Routers GROUP 3 Control Systems GROUP 4 Format Standards Converters GROUP 5 Range Extenders and Repeaters GROUP 6 Specialty AV Products GROUP 7 Scan Converters and Scalers GROUP 8 Cables and Connectors GROUP 9 Room Connectivity GROUP 10 Accessories and Rack Adapters and GROUP 11 Sierra Products Congratulations on purchasing your Kramer VA 4 Dual Channel Balanced Stereo Audio Amplifier which is ideal for the following typical applications e Presentation audio level control e Recording studios and broadcast studios for on line signal distribution 2 Getting Started We recommend that you Unpack the equipment carefully and save the original box and packaging materials for possible
4. XLR connectors to a balanced stereo audio acceptor Acceptor 2 Connect a PC or other control device to the RS 232 9 pn D sub port if control via RS 232 is required see Section 4 1 Connect the power cord to the mains electricity not shown in Figure 3 Select the stereo channel 1 or 2 by pressing the SELECT button and set the level using the and buttons as required ecting the VA 4 4 1 A Set Top Box Source 1 af Ni RS 232 Q i Balanced Balanced Balanced Stereo Audio Stereo Audio Stereo Audio gt Source 2 Acceptor 1 Acceptor 2 Figure 3 Connecting the VA 4 Dual Channel Balanced Stereo Audio Amplifier Connecting to the VA 4 via RS 232 You can connect to the unit via a crossed RS 232 connection using for example a PC A crossed cable or null modem is required as shown in method A and B respectively If a shielded cable is used connect the shield to pin 5 Method A Figure 4 Connect the RS 232 9 pin D sub port on the unit via a crossed cable only pin 2 to pin 3 pin 3 to pin 2 and pin 5 to pin 5 need be connected to the RS 232 9 pin D sub port on the PC Note There is no need to connect any other pins VA 4 Connecting the VA 4 Figure 4 Crossed Cable RS 232 Connection Hardware flow control is not required for this unit In the rare case where a controller requires hardware flow control short pin 1 to 7 and 8 and pin 4 to 6 on the
5. controller side Method B Figure 5 Connect the RS 232 9 pin D sub port on the unit via a straight flat cable to the null modem adapter and connect the null modem adapter to the RS 232 9 pin D sub port on the PC The straight cable usually contains all nine wires for a full connection of the D sub connector Because the null modem adapter which already includes the flow control jumpering described in Method A above only requires pins 2 3 and 5 to be connected you are free to decide whether to connect only these 3 pins or all 9 pins Null Modem Adapter Figure 5 Straight Cable RS 232 Connection with a Null Modem Adapter VA 4 Connecting the VA 4 EE 5 Technical Specifications INPUTS 2 balanced stereo up to 16dBm 33kQ on female XLR connectors OUTPUTS 2 balanced stereo up to 21dBm 50Q on male XLR connectors BANDWIDTH 3dB gt 100 kHz S N RATIO 80dB 6dB Gain unweighted CROSSTALK all hostile 74dB 1kHz 68dB 20kHz CONTROLS Level Control and Channel Selection Impedance selection COUPLING AC at output AUDIO THD NOISE 0 02 1kHz AUDIO 2nd HARMONIC 0 008 1kHz OPERATING TEMPERATURE 0 to 40 C 32 to 104 F STORAGE TEMPERATURE 40 to 70 C 40 to 158 F HUMIDITY 10 to 90 RHL non condensing DIMENSIONS 19 x 7 x 1U W D H WEIGHT 2 5 kg 5 5 Ibs approx ACCESSORIES Power cord Null modem adapter Windows based control
6. disposal to landfill or incineration by requiring it to be collected and recycled To comply with the WEEE Directive Kramer Electronics has made arrangements with the European Advanced Recycling Network EARN and will cover any costs of treatment recycling and recovery of waste Kramer Electronics branded equipment on arrival at the EARN facility For details of Kramer s recycling arrangements in your particular country go to our recycling pages at http Avww kramerelectronics com support recycling 3 Overview The VA 4 is a volume controller for two channels of balanced stereo audio signals on XLR connectors The volume of each stereo channel can be adjusted independently of the other stereo channel The VA 4 Features a digitally controlled volume control function Uses high quality low distortion audio components enabling transparent processing of the audio signals Lets you control the audio gain of each channel via the front panel or via RS 232 Includes a bright 7 segment LED display on the front panel showing the current gain or attenuation setting Stores settings in the non volatile memory upon shut down 3 1 Defining the VA 4 Dual Channel Balanced Stereo Audio Amplifier This section defines the VA 4 POWER _ Dual Channel Balanced Stereo Audio Amplifier Figure 1 VA 4 Dual Channel Balanced Stereo Audio Amplifier Front Panel Feature Function POWER Switch Illuminated switch supplyi
7. future shipment Review the contents of this user manual e Use Kramer high performance high resolution cables Go to http www kramerelectronics com to check for up to date user manuals application programs and to check if firmware upgrades are available where appropriate 2 1 Achieving the Best Performance To achieve the best performance Use only good quality connection cables to avoid interference deterioration in signal quality due to poor matching and elevated noise levels often associated with low quality cables Do not secure the cables in tight bundles or roll the slack into tight coils e Avoid interference from neighboring electrical appliances that may adversely influence signal quality Position your Kramer VA 4 away from moisture excessive sunlight and dust This equipment is to be used only inside a building It may only be connected to other equipment that is installed inside a building 2 2 Safety Instructions Caution No operator serviceable parts inside the unit Warning You use only the power cord that is supplied with the unit Do not open the unit High voltages can cause electrical shock Servicing by qualified personnel only Warning Disconnect the power and unplug the unit from the wall before installing 2 VA 4 Getting Started 2 3 Recycling Kramer Products The Waste Electrical and Electronic Equipment WEEE Directive 2002 96 EC aims to reduce the amount of WEEE sent for
8. will not do Under This Limited Warranty If this product is returned to Kramer Electronics or the authorized dealer from which it was purchased or any other party authorized to repair Kramer Electronics products this product must be insured during shipment with the insurance and shipping charges prepaid by you If this product is returned uninsured you assume all risks of loss or damage during shipment Kramer Electronics will not be responsible for any costs related to the removal or re installation of this product from or into any installation Kramer Electronics will not be responsible for any costs related to any setting up this product any adjustment of user controls or any programming required for a specific installation of this product How to Obtain a Remedy under this Limited Warranty To obtain a remedy under this limited warranty you must contact either the authorized Kramer Electronics reseller from whom you purchased this product or the Kramer Electronics office nearest you For a list of authorized Kramer Electronics resellers and or Kramer Electronics authorized service providers please visit our web site at www kramerelectronics com or contact the Kramer Electronics office nearest you In order to pursue any remedy under this limited warranty you must possess an original dated receipt as proof of purchase from an authorized Kramer Electronics reseller If this product is returned under this limited warranty a return authorization numb
9. 5 Sf 80 81 81 16 81 86 81 16 81 97 81 21 3 16 81 cf 81 3f 80 81 81 16 81 87 81 16 81 98 81 24 1 86 16 81 0 81 3f 80 81 81 16 81 88 81 16 81 99 81 20 8 16 81 d1 81 3f 80 81 81 16 81 89 81 16 81 9a 81 20 6 16 81 d2 81 3f 80 81 81 16 81 8a 81 16 81 9b 81 20 3 16 81 d3 81 3f 80 81 81 16 81 8b 81 16 81 9c 81 20 1 16 81 d4 81 3f 80 81 81 16 81 8c 81 16 81 9d 81 19 8 16 81 d5 81 3f 80 81 81 16 81 8d 81 16 81 96 81 19 6 80 16 81 d6 81 5 9 24 3f 80 81 81 16 81 8e 81 16 81 Of 81 19 4 16 81 d7 81 56 23 3f 80 81 81 16 81 8f 81 16 81 a0 81 19 1 16 81 d8 81 3f 80 81 81 16 81 90 81 16 81 a1 81 18 9 16 81 d9 81 3f 80 81 81 16 81 91 81 16 81 a2 81 18 6 16 81 da 81 3f 80 81 81 16 81 92 81 16 81 a3 81 18 4 75 16 81 db 81 3f 80 81 81 16 81 93 81 16 81 a4 81 18 1 16 81 dc 81 7 3f 80 81 81 16 81 94 81 16 81 a5 81 17 9 16 81 dd 81 3f 80 81 81 16 81 95 81 16 81 a6 81 17 6 72 16 81 de 81 16 16 81 a7 81 17 4 16 81 df 81 15 16 81 a8 81 17 2 16 81 e0 81 16 81 a9 81 16 9 16 81 e1 81 16 81 aa 81 16 7 68 16 81 e2 81 16 81 ab 81 16 4 16 81 e3 81 16 81 ac 81 16 2 66 16 81 e4 81 16 81 ad 81 15 9 16 81 e5 81 16 81 ae 81 15 7 16 81 e6 81 16 81 af 81 15 4 16 81 e7 81 16 81 00 81 i 16 81 e8 81 61 1 ff gt NM i l 5 E a N af o 11 e Ay 5 ALN ao wj ef n gt gt 9 7 A A N YRS ol 1 16 81 01 81
10. D column The VA 4 has a gain resolution of 0 245dB each step is 0 245dB Hex codes are shown for channel 1 For channel 2 for 4 byte strings change the 2nd byte from 81 to 82 and for 8 byte strings change the 6th byte from 81 to 82 For example for gain with the LED showing 166 for channel 2 send 16 82 80 81 for the LED showing 26 send 3f 80 81 81 16 82 0 81 col 2000 VA 4 Hex Codes for Gain Control Attenuation Gain dB LED Hex Codes Gain dB LED Hex Codes Gain dB LED Hex Codes 407 1681 6081 27 e 16 81 83 81 26 2 107 16 81 13 81 GEE enaa 81 16 81 86 81 25 5 104 16 81 be 81 48 16 81 f6 81 16 81 88 81 25 0 102 11 3 46 16 81 f8 81 16 81 89 81 101 45 16 81 f9 81 wawe as oo eee z ees eres 20 we eeraa a enes 16 81 8d 81 97 10 0 41 16 81 fd 81 16 81 8e 81 23 5 96 16 81 0681 98 40 16 81 fe 81 16 81 8f 81 23 3 16 81 c7 81 9 6 39 16 81 ff 81 16 81 90 81 23 0 16 81 c8 81 3f 80 81 81 16 81 80 81 16 81 91 81 22 8 93 16 81 c9 81 9 1 37 3f 80 81 81 16 81 81 81 16 81 92 81 22 5 16 81 ca 81 3f 80 81 81 16 81 82 81 16 81 93 81 22 3 16 81 cb 81 86 35 3f 80 81 81 16 818381 16 81 94 81 22 1 20 16 81 cc 81 8 3 34_ 3f 80 81 81 16 81 84 81 16 81 95 81 21 8 89 16 81 cd 81 3f 80 81 81 16 81 85 81 16 81 96 81 21 6 16 81 ce 81 7813
11. KRAMER ELECTRONICS LTD USER MANUAL MODEL VA 4 Dual Channel Balanced Stereo Audio Amplifier P N 2900 000004 Rev 2A VA 4 Quick Start Guide This guide helps you install and use your product for the first time For more detailed information go to http www kramerelectronics com support product_downloads asp lid to download the latest manual or scan the QR code on the left Step 1 Check what s in the box A VA 4 Dual Channel Balanced Stereo M 4 Rubber feet Audio Amplifier 1 Quick Start sheet 1 Power cord Step 2 Install the VA 4 Mount the VA 4 in a rack or attach the rubber feet and place on a table Step 3 Connect the inputs and outputs Computer Controller Step 4 Connect the power a Connect the power cord to the VA 4 and plug it into the mains electricity Step 5 Operate the VA 4 Select channel to control and set the volume level SELECT _ 7 O comer 1 O l CHANNEL 2 Contents 1 Introduction 2 Getting Started 2 1 Achieving the Best Performance 2 2 Safety Instructions 2 3 Recycling Kramer Products 3 Overview 3 1 Defining the VA 4 Dual Channel Balanced Stereo Audio Amplifier 4 Connecting the VA 4 4 1 Connecting to the VA 4 via RS 232 5 Technical Specifications 6 Protocol 2000 Figures Figure 1 VA 4 Dual Channel Balanced Stereo Audio Amplifier Front Panel Figure 2 VA 4 Dual Channel Balanced Stereo Audio Amplifier Rear Panel Figure 3 Connecting the VA 4
12. OR A PARTICULAR PURPOSE IF KRAMER ELECTRONICS CANNOT LAWFULLY DISCLAIM OR EXCLUDE IMPLIED WARRANTIES UNDER APPLICABLE LAW THEN ALL IMPLIED WARRANTIES COVERING THIS PRODUCT INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE SHALL APPLY TO THIS PRODUCT AS PROVIDED UNDER APPICABLE LAW IF ANY PRODUCT TO WHICH THIS LIMITED WARRANTY APPLIES IS A CONSUMER PRODUCT UNDER THE MAGNUSON MOSS WARRANTY ACT 15 U S C A 2301 ET SEQ OR OTHER APPICABLE LAW THE FOREGOING DISCLAIMER OF IMPLIED WARRANTIES SHALL NOT APPLY TO YOU AND ALL IMPLIED WARRANTIES ON THIS PRODUCT INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR THE PARTICULAR PURPOSE SHALL APPLY AS PROVIDED UNDER APPLICABLE LAW Other Conditions This limited warranty gives you specific legal rights and you may have other rights which vary from country to country or state to state This limited warranty is void if i the label bearing the serial number of this product has been removed or defaced ii the product is not distributed by Kramer Electronics or iii this product is not purchased from an authorized Kramer Electronics reseller If you are unsure whether a reseller is an authorized Kramer Electronics reseller please visit our Web site at www kramerelectronics com or contact a Kramer Electronics office from the list at the end of this document Your rights under this limited warranty are not diminished if you do not complete and return the product regist
13. ed circuit s included in the product will not become obsolete or that such items are or will remain compatible with any other product or technology with which the product may be used How Long Does this Coverage Last Three years as of this printing please check our Web site for the most current and accurate warranty information Whois Covered Only the original purchaser of this product is covered under this limited warranty This limited warranty is not transferable to subsequent purchasers or owners of this product What Kramer Electronics will do Kramer Electronics will at its sole option provide one of the following three remedies to whatever extent it shall deem necessary to satisfy a proper claim under this limited warranty 1 Elect to repair or facilitate the repair of any defective parts within a reasonable period of time free of any charge for the necessary parts and labor to complete the repair and restore this product to its proper operating condition Kramer Electronics will also pay the shipping costs necessary to return this product once the repair is complete 2 Replace this product with a direct replacement or with a similar product deemed by Kramer Electronics to perform substantially the same function as the original product 3 Issue a refund of the original purchase price less depreciation to be determined based on the age of the product at the time remedy is sought under this limited warranty What Kramer Electronics
14. er obtained from Kramer Electronics will be required You may also be directed to an authorized reseller or a person authorized by Kramer Electronics to repair the product 10015 decided that this product should be returned directly to Kramer Electronics this product should be properly packed preferably in the original carton for shipping Cartons not bearing a return authorization number will be refused Limitation on Liability THE MAXIMUM LIABILITY OF KRAMER ELECTRONICS UNDER THIS LIMITED WARRANTY SHALL NOT EXCEED THE ACTUAL PURCHASE PRICE PAID FOR THE PRODUCT TO THE MAXIMUM EXTENT PERMITTED BY LAW KRAMER ELECTRONICS IS NOT RESPONSIBLE FOR DIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION OR UNDER ANY OTHER LEGAL THEORY Some countries districts or states do not allow the exclusion or limitation of relief special incidental consequential or indirect damages or the limitation of liability to specified amounts so the above limitations or exclusions may not apply to you Exclusive Remedy TO THE MAXIMUM EXTENT PERMITTED BY LAW THIS LIMITED WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF ALL OTHER WARRANTIES REMEDIES AND CONDITIONS WHETHER ORAL OR WRITTEN EXPRESS OR IMPLIED TO THE MAXIMUM EXTENT PERMITTED BY LAW KRAMER ELECTRONICS SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY AND FITNESS F
15. ng power to the unit 2 Buon ress to decrease the level Press to increase the level 6 Channel7LED 00071018155 when channel 1 is chosen via the SELECT button illuminates when channel 2 is chosen via the SELECT button 91 49 0 _ 7 Feature CH 1 IN LEFT and RIGHT XLR Female Connectors CH 2 IN LEFT and RIGHT XLR Female Connectors CH 1 OUT LEFT and RIGHT XLR Male Connectors CH 2 OUT LEFT and RIGHT XLR Male Connectors RS 232 9 pin D sub Port Power Connector with FUSE Function Connects to the balanced stereo audio source 1 Connects to the balanced stereo audio source 2 Connects to the balanced stereo audio acceptor 1 Connects to the balanced stereo audio acceptor 2 Connects to the PC or the Remote Controller AC connector enabling power supply to the unit 90 240 VAC 50 60 Hz 4 Connecting the VA 4 Always switch off the power to each device before connecting it to your VA 4 After connecting your VA 4 connect its power and then switch on the power to each device To connect the VA 4 as illustrated in the example in Figure 3 1 Connect a balanced stereo audio source for example a set top box source 1 to the left and right channel 1 IN XLR connectors Connect a balanced stereo audio source Source 2 to the left and right channel 2 IN XLR connectors Connect the left and right channel 1 OUT XLR connectors to a balanced stereo audio acceptor Acceptor 1 Connect the left and right channel 2 OUT
16. ration form or complete and submit the online product registration form Kramer Electronics thanks you for purchasing a Kramer Electronics product We hope it will give you years of satisfaction VA 4 Protocol 2000 For the latest information on our products and a list of Kramer distributors visit our Web site where updates to this user manual may be found We welcome your questions comments and feedback Web site www kramerelectronics com KRAMER E mail info kramerel com SAFETY WARNING Disconnect the unit from the power m supply before opening and servicing P N 2900 000004 Rev 2A
17. software OPTIONS Specifications are subject to change without notice at http Awww kramerelectronics com VA c VA 4 Technical Specifications Protocol 2000 The VA 4 is compatible with Kramer s Protocol 2000 version 0 51 This RS 232 RS 485 communication protocol uses four bytes of information as defined below For RS 232 a null modem connection between the machine and controller is used The default data rate is 9600 baud with no parity 8 data bits and 1 stop bit The first table below lists the VA 4 Hex codes for gain control attenuation and the second table below lists the VA 4 Hex codes for gain control amplification In addition the following commands are also valid 1 2 3 4 To increment the gain of channel 1 in steps of 1 send hex bytes 18 81 80 81 To decrement the gain of channel 1 in steps of 1 send hex bytes 18 81 81 81 To increment the gain of channel 2 in steps of 1 send hex bytes 18 82 80 81 To decrement the gain of channel 2 in steps of 1 send hex bytes 18 82 81 81 To request the gain of channel 1 send hex codes 19 81 80 81 The response is as per the following tables except that 59 is sent instead of the constant byte 16 and 7f instead of the constant byte 3f To request the gain of channel 2 send hex codes 19 82 80 81 In the tables below The dB column shows the machine s gain value at the setting shown in the LE
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