MADA-2000 Media Audio Distribution Amplifier (Press Patch)
Contents
1. saa COMMUNICATIONS mar G COMPANY WI OM inc MADA 2000 Owners Manual Rev A 7 1 99 9181 Chesapeake Drive San Diego CA 92123 lt 858 560 4162 858 560 1923 Fax MADA 2000 Media Audio Distribution Amplifier MADA 2000 Media Audio Distribution Amplifer O b O b 9 0 bs Ov Why put up with the necessity of placing numerous unsightly microphones on a podium that block the sight lines to the speaker just to provide recording feeds to print and TV reporters With the MADA 2000 there only needs to be one microphone to provide that recording feed The Media Audio Distribution Amplifier is an audio mixing amp distribution amplifier that is capable of supplying audio to reporters and sound cameramen at press conferences The amplifier mixer portion ofthe MADA 2000 provides two 2 microphone and one 1 line inputs which in turn feed the mixed signal to ten fully insolated microphone or line level outputs Each output is equipped with assorted standard connectors assuring easy access by the media Other uses include on locations recording interfacing large audio systems at conventions and isolating signals in applications where AC ground currents might present problems The MADA 2000 features up to 60db of gain low out put noise 90db low distortion less than 25 THD at full rated output and flat frequency response 0 5db 24 18kHz2. The MADA 2000 amplifier is self contained with it s own power supply and features differential balanced inputs with Op Amp transformer isolated outputs Isolation between outputs is well over 100db All outputs includ ing headset monitoring jack monitor level control and Bar LED level indicators are located on the front panel Each of the ten 10 outputs are independently select able to line or microphone level with each having select able ground isolation to solve ground current problems The rear panel contain s XLR input connectors phan tom power control mixing level controls and LED sys tem level indicators Link in link out connectors are also mounted on the rear panel enabling cascading MADA 2000 s to allow for multiple input and outputs The MADA 2000 is designed for standard EIA 19 rack mounting and requires 3 5 of vertical rack space 9 b 29 1 Ov COMMUNICATIONS aBEBER ML siis ololo o mn UU Specifications Type Audio Distribution Amplifier Frequency Response 5db 24 Hz to 18kHz Inputs Two balanced microphone inputs One balanced line input Input Source Impedance Microphone 1k ohms Line 7 5k ohms Ten 10 Line Mic selectable 600 ohms Odbm Number of Outputs Link Connection Maximum Gain 60db continuously variable Maximum Output 20dbm into 600 ohms Nominal system Output 4dm into 600 ohms Line 60dbm into 1k ohms Mic Output Source Impedance 6
3. 00 ohms line 220 ohms mic Distortion THD 25 at maximum rated output Signal to Noise Ratio 4dbm 90db 24 hz 18khz 600 ohms source 600 ohm load unweighted Isolation Between Outputs 100db 30 hz 18khz Output Metering LED Bar Graph Green below 6db Yellow 15db Red 21db Output Monitoring Headphone Jack 600 to 1500 ohms stereo Connections Inputs XLR female 3 pin Outputs XLR male 3 pin 1 8 mini phone Ya phone Dimensions 19 w x 3 5 h x 4 5 d 47 5cm x 8 5cm x 11 25cm Weight 6lbs 2 7 kg Power Requirements 106 130 VAC 50 60Hz 25 watts Congratulations on your purchase of the Communications Company MADA 2000 Media Audio Distribution Amplifier The MADA 2000 Is an audio press patch aka newsbridge which allows distribution of up to three audio sources to multiple press recording devices It may also be used as an audio distribution amplifier and an isolation device in difficult grounding sites The MADA 2000 functions as both a mixer pre amplifier and distribution amplifier The mixer is comprised of two Microphone 150 Q inputs and one Line 600 Q input The MADA 2000 will mix the 3 input signals then amplify that signal to either 56dBm for microphone or 4dBm for line level and distribute that signal to the ten outputs The mixing stage of the MADA 2000 has a maximum of 60 dB of gain available The distribution section is equipped with ten transformer isolated outputs for mic
4. amp PIN 1 GROUND LOW LOW TIP HIGH TIP HIGH KAN AGE PIN 3 LOW Courtesy of Rane Corporation Addendum 1
5. ill eliminate the problem Third suggestion Do a full diagnostic of the system wiring A Unplug all input cables and re insert them one at a time checking to see if the noise hum is caused by that input If so look at the how the cable is wired and confirm that it is wired to industry standard micro phone pin wiring This is important because the MADA is designed and wired to the following industry standard wiring conventions XLR 1 Phone 1 8 Mini Pin 1 Shield Ground Tip Hot Tip Hot Pin 2 Hot Ring Negative Ring Negative Pin 3 Negative Sleeve Shield Ground Sleeve Shield Ground B Unplug all output cables and then re insert each one at a time until the noise hum reappears This will allow you to identify the offending cable or piece of equipment If it is not possible to remove the offending hum then try the following 1 Put an isolation transformer between the item and the MADA 2 Look at the patch cord being used Fourth suggestion A Keep all cables short B Keep cables of the same signal type and level together C Keep cables of different signal levels apart D If cables are pigtailed keep exposed conductors and copper as short as possible E Make sure that all patch cables are wired to industry standards See addendum 1 Since the subject of grounding could fill a large book the above suggestions are a attempt to help with trouble shooting We s
6. k Out connectors on the rear of the unit These connections allow multiple MADA 2000 units to be cascaded together to provide more outputs if needed The Link Out connection is a XLR Male 3 pin and the Link In connection is a XLR Female 3 pin This allows the use of standard microphone cables to make the connections Keep in mind the link circuit is not two way If two microphones are plugged in to MADA 1 and a microphone is plugged in to MADA 2 the microphone in MADA 2 will not be distributed in MADA 1 How ever MADA 2 and all further units will be provided a mix of both MADA 1 and MADA 2 There is no practical limit on the number of MADA 2000 s that can be linked together There have been several instances of ten MADA 2000 s linked without signal loss or audio degradation occurring MOUNTING COMMUNICATIONS dumma Power Indicator Control E e e e e Output dBm O e Monitor Level Output Level Meter 1 4 Headset Monitor Headset Phone Jack Output LINK IN MADA 2000 MEDIA AUDIO DISTRIBUTION AMPLIFIER LINK IN MADA 2000 MEDIA AUDIO DISTRIBUTION AMPLIFIER LINK IN SYSTEM LEVEL INDICATOR MADA 2000 MEDIA AUDIO DISTRIBUTION AMPLIFIER The MADA 2000 is supplied in a standard 19 wide 3 5 high rack mount format It s 7 5 depth will fit into any standard EIA 19 rack The unit also includes two handles that provide for ease of handing and protection of the connectors pl
7. mp WARNING DO NOT INSTALL 240V JMPR UNLESS BOTH 120V JMPRS ARE REMOVED EFLFE 240V CAUTION TO REDUCE THE RISK OF FIRE REPLACE F1 FUSE ONLY WITH THE SAME TYPE AND RATING 105 125V OPERATION 1 4A 250V MDL 210 250V OPERATION 1 8A 250V MDL 250V 1 8 amp Jumper 220 240V JP3 In Addendum 1 there are samples of connection wiring and standard patch cable wiring These are industry standard wiring conventions and the MADA 2000 is designed around them GROUNDING Almost all cases of hum or noise in audio systems can be traced back to ground loops and grounding problems The MADA is subject to ground loops as are all electronics units that have an on board power supply Some simple suggestions are First and most important suggestion Don t clip the ground leg off the AC cord The removal of the ground leg from a AC connector will substantially increase the chance of getting electrical shock We don t recommend or advocate removing the ground leg as there is little proof this action will consistantly eliminate ground loop hum Second Suggestion Each of the ten outputs of the MADA has a three position grounding toggle switch which is provided to help reduce grounding problems Left unbalances the connection Center lifts pin 1 off the system ground buss Right isthe normal position connection is balanced and pin 1 is routed to ground Move the grounding toggle switch between the 3 positions to see if it w
8. rophone and line Each output is provided with a 3 pin Male XLR receptacle a 1 4 phone jack a 1 8 mini phone jack a ground lift switch and a microphone line level selector switch How to use the MADA 2000 The MADA 2000 is a very simple and forgiving device to use Just plug in the source microphone s adjust the output level using the built in LED meters then plug in your recording devices 1 INPUT CONTROLS There are three independent inputs on the rear of the MADA 2000 Two are Microphone level 150 Q XLR F and these are designed to have a podium microphone directly plugged into them There are individually selectable phantom power 15 Vdc available on each of the microphone inputs The Line input 600 Q XLR F is designed to accept a feed from a mixer or house sound system MIC 2 1 LINK o LINE IN LEVEL LINK IN POWER e 105 dU af SUE DE D ENAC aane DE amu el HIS A TANCE R eon AVIS RISQUE DE CHOC ELECTRIC NE PAS OUVRIR NOTE All three inputs can be used simultaneously Keep in mind that each input needs to be set at a level comparable to the other two so that one is not louder as there is no master volume control on the unit 2 LEVEL SETTING On the left rear of the MADA 2000 there are 3 LED s High red OK green Low yellow The LED s are provided as an aid to set the output signal level Adjust the rear input level control s to the point at which the OK green LED is on solid Thi
9. s will indicate that the output level will be in the 6 to 6dB range which under normal usage is an appropriate output signal level It is normal that the Red high and Yellow low LED s will flicker as the signal level varies Make sure the Red LED is not constantly on as this would indicate an overdrive situation or the Yellow LED is not constantly on as this would indicate a low signal situation 3 OUTPUTS On the front of the MADA 2000 are ten identical outputs with the following features MADA 2000 MediaA 1 ea XLR 3 pin Male jack 1 ea 1 4 6 25mm 3 conductor TRS Phone jack Y Q PETE 1 ea 1 8 3 5mm 3 conductor TRS Mini jack on 1 ea Microphone 150 Q or Dulpul Selector y 1 4 6mm Jack line 600 Q output selector fis gt 1 ea Three position grounding Switch XLR M i EE Z UnSeich Select the output level required plug into the desired o connector and the signal will then be distributed to that user 4 OUTPUT CONTROLS The main output controls are on the front of the MADA 2000 and feature the following A red power indicator LED that is lit wnen the MADA 2000 is powered A headphone output jack with 8 watts of power and a volume control This is provided to allow system monitoring and help with setup Also on the front panel is a Bar Graph LED s that mirror s the action of the rear panel LED s but is more visually detailed LINK SECTION The MADA 2000 is provided with Link In and Lin
10. trongly suggest you research this audio area in greater depth For more in depth information on audio grounding we have found the following books and technical papers to be of value AES Journal Vol 43 6 June 1995 Glen Ballou Handbook for Sound Engineers The Audio Cyclopedia ISBN 0240803310 Don amp Carolyn Davis Sound System Engineering ISBN 0240803051 Rane Corporation Tech Note 102 Analog I O Standards Tech Note 110 Sound System Interconnection Yamaha Gary Davis amp Ralph Jones Sound System Reinforcement Handbook ISBN 0881889008 Jon Eiche A Guide to Sound Systems for Worship ISBN 079350029X Balanced XLR to XLR SHIELD RED Balanced XLR to Balanced TRS Phone SHIELD Balanced XLR to Unbalanced TS Phone SHIELD _ RED Balanced XLR to Balanced 1 8 Mini BLACK SHIELD BLACK Balanced XLR to Unbalanced Phono RCA Balanced TRS Phone Unbalanced TS Phone Balanced TRS Phone Unbalanced Phono RCA BLACK SHIELD SHIELD TIP SLEEVE 1 8 TRS PLUG 1 4 TRS PLUG RCA PLUG SLEEVE GROUND SLEEVE GROUND SLEEVE GROUND amp RING LOW RING LOW LOW TIP HIGH TIP HIGH ur ut de 1 8 TS PLUG 1 4 TS PLUG XLR 3 PIN PLUG SLEEVE GROUND amp SLEEVE GROUND
11. ugged into the front panel If you plan to install the MADA 2000 in a transportation case keep in mind the unit is only 7 5 deep but potentially needs 4 of clearance on the front of the unit The case should be ordered in a short depth model to facilitate access to the rear connections and allow viewing of the rear mounted input level LED s Headset Volume POWER The MADA 2000 is powered by an on board power supply that is wired from the factory at 120Vac 50 60Hz The power supply can be easily changed to operate on 240Vac 50 60Hz by moving jumpers and exchanging a fuse located on the main PC board The MADA 2000 can be ordered from our factory in the 240 Vac configuration just notify sales at time of order If you need to make a change from 110 120Vac to 220 240Vac in the field here are the steps involved 1 UNPLUG the MADA 2000 from all power and remove the A C cable from the rear of the unit 2 Remove the top of the unit 3 With the output connections toward you the power Jumpers supply is located on the lower PC board on the left 110 120V side It will look similar to this diagram gt gt gt gt JP1 amp JP2 4 Unsolder and remove jumpers JP1 and JP2 la beled 120V 5 Install and solder a new jumper at JP3 labeled 240V 6 Replace the existing F1 fuse with a 1 8 amp 250V MDL fuse 7 Do not remove any other jumpers 8 Re Install the top of the unit Mic Line Diagram s Fuse 120V 1 4 a
Download Pdf Manuals
Related Search