Model MDA-100 Mixing Distribution Amplifier User Manual
Contents
1. A c 117V 220V FIGURE 1 Functional Diagram MDA 100 Mixing Distribution Amplifier Specifications General Power Consumption 20Watts Maximum 110Vac or 220Vac nominal 1096 50 60Hz Operating Temperature Range 0 50 C 32 122 F Dimensions Width 19 inches 483mm Height 1 75 inches 44mm Depth 8 5 inches 213mm Weight 9 Ibs 4 1kg Summing Amplifier 8 x 1 Input Level 20dBm to 24dBm Input Impedance gt 20kOhm active balanced Output Level 28dBu maximum Output Source Impedance 600 Ohm active balanced Gain Adjustment 12dB Front Panel per input 12dB internal output trim Frequency Response 0 to 0 2dB 20Hz to 20kHz referenced to 1kHz Distribution Amplifier 1 x 8 Input Level 22 to 14dBu nominal for 8dBm output Maximum 28dBu Input Type and Impedance Active balanced 20kOhm 600 Ohm or 150 Ohm selectable Output Level 28dBu maximum 60 Ohms Output Source Impedance 60 Ohms active balanced Output Isolation gt 80dB 20Hz to 20kHz Output DC Offset lt 50mVdce Gain Adjustment Each output independently adjustable for 6dB to 28dB 34dB Frequency Response 0 to 0 2dB 20Hz to 20kHz referenced to IKHz Noise 124dB below maximum output at unit gain 20Hz to 20kHz Nominally 114bB below at 18 dBu unity gain 20Hz to 20kHz Typically 104dB below 8dBm Total Harmonic Distortion lt 0 01 20Hz to 20kHz at unity gain Up to 28dBu output level2. Inter modulation Distortion 0 008 at unity gain Up to 28dBu output level 4 1 ratio Typically lt 0 001 at 8dBu Common Mode Rejection gt 80dB 20Hz to 20kHz Typically 96dBu at 1kHz adjustable Common Mode Voltage 100V peak to peak maximum 10 CHAPTER 2 Installation Preparation The MDA 100 fits in 19 483mm wide standard equipment racks consoles and turrets Prepare the equipment rack for installation of the MDA 100 and locate a suitable power source Power Connection Before plugging in the power cord verify the voltage selector switch is set to the correct voltage To correctly set the voltage selector do the following gt Use a flat head screwdriver to align the white dot with 110 or 220 depending on your supply voltage To power up the MDA 100 do the following 1 Plug the power cord into the MDA 100 2 Plug the other end into an AC outlet 11 FIGURE 2 Rear Panel Layout MDA 100 Distribution Amplifier J1 Summing amplifier output J2 Summing amplifier inputs 5 8 J3 Summing amplifier inputs 1 4 J4 Distribution amplifier input termination select J5 Distribution amplifier outputs 5 8 J6 Distribution amplifier outputs 1 4 J7 System Chassis ground A Voltage selector switch B Fuse and fuse holder C Line cord receptacle Audio Connections All connections to the MDA 100 are made on the rear panel using the mating Molex connectors from
3. WARNING APPARATUS SHALL NOT BE EXPOSED TO DRIPPING OR SPLASHING AND NO OBJECTS FILLED WITH LIQUIDS SUCH AS VASES SHALL BE PLACED ON THE APPARATUS WARNING THE MAIN POWER PLUG MUST REMAIN READILY OPERABLE CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK GROUNDING OF THE CENTER PIN OF THIS PLUG MUST BE MAINTAINED WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK DO NOT EXPOSE THIS APPRATUS TO RAIN OR MOISTURE WARNING TO PREVENT INJURY THIS APPARATUS MUST BE SECURELY ATTACHED TO THE FLOOR WALL RACK IN ACCORDANCE WITH THE INSTALLATION INSTRUCTIONS This product is AC only y pal ee eee ne 10 11 12 13 14 Important Safety Instructions Read these instructions Keep these instructions Heed all warnings Follow all instructions Do not use this apparatus near water Clean only with dry cloth Do not block any ventilation openings Install in accordance with the manufacturer s instructions Do not install near any heat sources such as radiators heat registers stoves or other apparatus including amplifiers that produce heat Do not defeat the safety purpose of the polarized or grounding type plug A polarized plug has two blades with one wider than the other A grounding type plug has two blades and a third grounding prong The wide blade or the third prong are provided for your safety If the provided plug does not fit into your outlet consult an electricia
4. the supplied connector kit Wires should be 18 24 AWG shielded twisted pairs The required tools for crimping and extraction of wires are not supplied with the MDA 100 These tools may be obtained from http www molex com The following illustrations are views of the mating connectors as seen from the side where wires are inserted J1 Connector TABLE 1 Summing Amp Output Pin Function Audio Output Shield Audio Output Not Used Shield Alaj BR wl ny Not Used 12 J2 Connector TABLE 2 Summing Amp Inputs 5 8 J3 Connector TABLE 3 Summing Amplifier Inputs 1 4 Pin Function 1 Input No 5 7 Input No 5 2 Shield No 5 3 Input No 6 9 Input No 6 5 Shield No 6 4 Input No 7 10 Input No 7 8 Shield No 7 6 Input No 8 12 Input No 8 11 Shield No 8 Pin Function 1 Input No 1 7 Input No 1 2 Shield No 1 3 Input No 2 9 Input No 2 5 Shield No 2 4 Input No 3 10 Input No 3 8 Shield No 3 6 Input No 4 12 Input No 4 11 Shield No 4 13 J4 Connector TABLE 4 Distribution Amp Input Termination Pin Function 1 Audio Input 3 Audio Input els Ta z 3l2l 4 See Note 5 Shield 6 See Note NOTE If the audio source requires a 600 Ohm termination install a jumper across pins
5. 4 and 6 Ifthe source requires a 150 Ohm termination jumper pin 3 to 4 and pin to 6 For bridging input leave pins 4 and 6 open J 5 Connector TABLE 5 Distribution Outputs 5 8 Pin Function 1 Output No 5 7 Output No 5 2 Shield No 5 3 Output No 6 9 Output No 6 5 Shield No 6 4 Output No 7 10 Output No 7 8 Shield No 7 6 Output No 8 12 Output No 8 11 Shield No 8 14 J6 Connector TABLE 6 Distribution Outputs 1 4 Pin Function 1 Output No 1 7 Output No 1 2 Shield No 1 3 Output No 2 9 Output No 2 5 Shield No 2 4 Output No 3 10 Output No 3 8 Shield No 3 6 Output No 4 12 Output No 4 11 Shield No 4 J7 Connector TABLE 7 Chassis and Audio Ground Pin Function 1 Chassis ground 2 Chassis ground l6 5 4 4 Chassis ground 3l2l 3 Audio common 5 Audio common 6 Audio common NOTE e As supplied the MDA 100 chassis ground is connected to earth ground through the line cord and the audio ground is isolated from earth ground e Your installation may require the audio ground be connected to some reference other than earth ground In this case connect your ground reference to pins 3 5 and 6 of J7 e Ifseparate audio and chassis grounds are not required the chassis and audio ground pins of J7 may be interconnected for safety
6. Connect pin 1 to pin 3 pin 2 to pin 5 and pin 4 to pin 6 15 Audio Level Settings Summing Amplifier To adjust the trim of the summing amplifier do the following 1 Activate all audio devices connected to the MDA 100 2 While monitoring the summing amp output adjust the input level trimmers on the front panel of the MDA 100 as required to equalize the summing amplifier input levels Distribution Amplifier To adjust the distribution amplifier do the following gt Adjust the output level trimmers on the front panel of the MDA 100 as required to supply a satisfactory signal level at each output destination
7. RT Digital Matrix Intercom Innovating the Future of Communications Model MDA 100 Mixing Distribution Amplifier User Manual 9350710400 Rev F 12 2009 Proprietary Notice The product information and design disclosed herein were originated by and are the property of Bosch Security Systems Inc Bosch reserves all patent proprietary design manufacturing reproduction use and sales rights thereto and to any article disclosed therein except to the extent rights are expressly granted to others Copyright Notice Copyright 2009 by Bosch Security Systems Inc All rights reserved Reproduction in whole or in part without prior written permission from Bosch is prohibited Warranty Notice See the enclosed warranty card for further details Customer Support Technical questions should be directed to Customer Service Department Bosch Security Systems Inc 12000 Portland Avenue South Burnsville MN 55337 USA info rtsintercoms com Telephone 800 392 3497 Fax 800 323 0498 Technical Questions EMEA Bosch Security Systems Technical Support EMEA http www rtsintercoms com contact_main php Return Shipping Instructions Customer Service Department Bosch Security Systems Inc Lincoln NE Telephone 402 467 5321 Fax 402 467 3279 Factory Service 800 553 5992 Please include a note in the box which supplies the company name address phone number a person to contact regarding the repair the type and quantity o
8. e ground connection through the grounding conductor of the line cord is essential for safe operation Fusing This product is fitted with a fuse All fuse replacement related instructions are located in the service manual IMPORTANT SAFETY INSTRUCTIONS cit ee data san nee eie cou E Ev eet gestore ts teet ped eek 3 POWER OUT TS 5 dior qm D Mcr Y 5 CAUNON A NN 5 FUSE cacy O A EO es 5 INTRODUCTION lt a ds 7 Description and Specifications ne 7 DESCRIPTION necne in M a a ee a dee eee 7 SPECIRICATIONS ama OC SS ES AA ee INSTALLATION A A es 11 a AAA A M He if Pn TIAS Ie 11 Audio Connections RR 12 TE CONNECTOR qe EE 12 J CONNECTOR UII MI IM DEDI a nan o IEEE 13 JI CONNECTOR tits 13 JACONNECTOR aaea a a A E A A a Sa E A A 14 J J GONNECTOR ia 14 JO CONNECTOR Cone lado 15 JCCONNEOTORP uie oa 15 A A 16 SUMMING AMPEIRTER TRE T 16 DISTRIBUTION AMPLIFIER CHAPTER 1 Introduction Description and Specifications Description The MDA 100 Mixing and Distribution Amplifier contains an 8 x 1 summing amplifier also known as a mixer and a x 8 distribution amplifier in a case that is 1 RU Rack Unit high The MDA 100 is useful for example in CCU Camera Control where multiple camera operators have to talk and listen to one master control location In this application audio from each camera up to eight 8 is fed to
9. f equipment a description of the problem and the serial number s Shipping to the Manufacturer All shipments of product should be made via UPS Ground prepaid you may request from Factory Service a different shipment method Any shipment upgrades will be paid by the customer The equipment should be shipped in the original packing carton If the original carton is not available use any suitable container that is rigid and of adequate size If a substitute container is used the equipment should be wrapped in paper and surrounded with at least four 4 inches of excelsior or similar shock absorbing material All shipments must be sent to the following address and must include the Proof of Purchase for warranty repair Upon completion of any repair the equipment will be returned via United Parcel Service or specified shipper collect Factory Service Department Bosch Security Systems Inc 8601 East Cornhusker Hwy Lincoln NE 68507 U S A Attn Service CAUTION THE LIGHTNING THE EXCLAMA FLASH AND TION POINT ARROWHEAD CAUTION TO REDUCE THE WITHIN THE WITHIN THE TRIAN RISK OF ELECTRIC SHOCK TRIANGLE IS A GLE IS A WARNING DO NOT REMOVE COVER NO WARNING SIGN SIGN ALERTING USER SERVICABLE PARTS ALERTING YOU YOU OF DANGER INSIDE REFER SERVICINGTO OF IMPORTANT n QUALIFIED SERVICE PER INSTRUCTIONS OUS VOLTAGE INSIDE THE PROD SONNEL ACCOMPANY UCT ING THE PROD UCT SEE MARKING ON BOTTOM BACK OF PRODUCT
10. n for replacement of the obsolete outlet Protect the power cord from being walked on or pinched particularly at plugs convenience receptacles and the point where they exit from the apparatus Only use attachments accessories specified by the manufacturer Use only with the cart stand tripod bracket or table specified by the manufacturer or sold with the apparatus When a cart is used use caution when moving the cart apparatus combination to avoid injury from tip over Unplug this apparatus during lightning storms or when unused for long periods of time Refer all servicing to qualified service personnel Servicing is required when the apparatus has been damaged in any way such as power supply cord or plug is damaged liquid has been spilled or objects have fallen into the apparatus the apparatus has been exposed to rain or moisture does not operate normally or has been dropped Safety Summary Power Source This equipment is designed to operate from an AC power source as described in the electrical specifications Grounding The chassis of this product is grounded through the grounding pin of the line cord To avoid electrical shock with the power off plug the line cord into a properly wired receptacle before making any input or output connections with other devices Use only the line cord specified for your unit Ensure the line cord is in good condition and free of kinks Caution CAUTION A protectiv
11. one of the summing amplifier inputs of the MDA 100 All eight 8 audio inputs are summed and fed to the master controller input The return audio path from the master controller back to the individual cameras is accomplished using the distribution amplifier which takes the single audio output from the master controller and distributes it to each of the eight camera outputs The gain of each summing amplifier input may be individually adjusted by a trimmer on the front panel of the MDA 100 There is also an output adjustment trimmer located inside the MDA 1000 to adjust the final output level of the summing amplifier The summing amplifier output is a 60 Ohm voltage source The distribution amplifier has a separate output level trimmer for each output These trimmers are located on the front panel All the outputs are 60 Ohm voltage sources The input impedances may be set for bridging 20 kOhms 150 Ohms or 600 Ohms selected by rear panel jumpers The MDA 100 fits into a standard 19 483mm equipment rack The power entry module is an IEC approved type which contains a line voltage switch a line filter a fuse holder and a line cord socket connector The line voltage switch may be set for either 105 125 Vac 50 60Hz or 210 250Vac 50 60Hz supply voltages The MDA 100 features a torroidal transformer power supply for low noise operation 6 24 Typ 12 Typ 1X8 Output 8x1 Output
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