Gebruiksaanwijzing /service van het product MY4-AEC van de fabrikant Yamaha
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ACOUSTIC ECHO CANCELLER CARD MY 4 - AEC Owner’s Manual Bedienungsanleitung Mode d’emploi Manual de instrucciones Manuale di istruzioni Руководство пользователя 取扱説明.
FCC INFORMA TION (U .S.A.) 1. IMPORT ANT NOTICE: DO NOT MODIFY THIS UNIT! This product, when installed as indicated in the instructions contained in this manual, meets FCC requirements. Modifications not expressly a pproved by Y amaha may void your authority , granted by the FCC, to use the product.
MY4-AEC Owner’s Manual 3 PRECAUTIONS PLEASE READ CAREFULL Y BEFORE PROCEEDING * Please k eep this manual in a saf e place for future refere nc e . WA RN I N G Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards.
4 MY4-AEC Owner’s Manual Info rmation f or Users on Collection and Disp osal of Old Equipment This symbol on the products, pac kaging, and/or accompany ing documents means that used electrical and electronic products should not be mix ed with general household waste .
MY4-AEC Owner’s Manual 5 Intr oduction Thank you for choosing the Y amaha MY4-AEC. The MY4-AEC is an acoustic echo canc eller card designed for use with the DME64N/24N Digit al Mixing Engines that c.
6 MY4-AEC Owner’s Manual P rinciple of Oper ation How A coustic Echo an d Noise are R educed Acoustic echo occurs in a teleconfer encing syst em when the sound from a speaker or refl ections from surfaces of th e room ar e pick ed up by a microphone and tr ansmitted to the other party , resulting in a loss of intelligibi lity .
MY4-AEC Owner’s Manual 7 MY4-AEC Signal Flow The local and remote locations in a te leconferenc ing system ar e referred to as the “near end” and “far end”, respectively .
8 MY4-AEC Owner’s Manual The Connect ors and Their F u nctions AES/EBU IN and OUT Connectors These connectors support four channels of AES/EBU format digital audio input and output to and from the host DME64N/2 4N unit, but those si gnals are not dir ectly routed via the MY4-AEC processing section.
MY4-AEC Owner’s Manual 9 DME Processing DME64N/24N MY4-AEC AEC Processing SRC SRC AES/EBU [OUT1/2][OUT3/4] AES/EBU [IN1/2][IN3/4] Analog Out Mic In.
10 MY4-AEC Owner’s Manual Eur oblock Connec tion Please be sure to use the supplied Eur oblock plugs to connect the AES/EBU [IN] and [OUT] connectors. Cable prepar ation • T o prepar e the cable for attachment to a Eur oblock connector , strip the wir e as shown in the illustration using stranded wir e to make connections.
MY4-AEC Owner’s Manual 11 1 Loosen terminal scre ws. NOTE A slotted screwdriver with a blade width of about 3 millimeters is recommended. 2 Insert cables. 3 Se cu rely ti gh ten te rmi na l scr ews. Pull the cables (not t oo strongly) to confirm that they are secur ely connected.
12 MY4-AEC Owner’s Manual 4 Bundle the cables and the Eurobloc k tab using t he supplied cable tie . NOTE T rim any excess part of the cable tie as necessary .
MY4-AEC Owner’s Manual 13 Basic Connection and Set up This is an example of a teleconfere ncing system set up to allow multiple participants to hold conferen ces with a remote location (“Of fice X”).
14 MY4-AEC Owner’s Manual 3 Make the requir ed vir tual connections in the DME Designer configuration win dow. • Connect the signals from micropho ne inputs 1 – 4 to th e “Near -end Mic. 1” – “Near -end Mic. 4” inputs on the AEC component.
MY4-AEC Owner’s Manual 15 4 Speak into the microphones as y ou would during an actual conference and adjust the input ga in of each channel. Adjust the DME24N HA Gain while watching the “Mic. In” meters in the AEC component editor so that the yellow segment lights only occasionally .
16 MY4-AEC Owner’s Manual 5 Open the Oscillator component editor , set the Wa ve F orm type to “Pink, ” and engage the Output sec tion “On” but ton. Go back to the AEC component editor and, while watching the “Ref. In” meter , adjust the oscillator output level so that t he yellow segment lights only occasionally .
MY4-AEC Owner’s Manual 17 6 Check that the ERL (Echo Ret urn Loss) meter in the AEC component is moving. If this meter is moving ov er a wide range it means that a large portion of t he pink noise b.
18 MY4-AEC Owner’s Manual 1 Connect the microphones, speakers, and teleconferencing s ystem to the analog [IN] and [OUT] connectors on the rear panel of the DME24N as shown in the diagram. Four microphones can be conn ected at the near -end location, allowing multiple conferenc e participants.
MY4-AEC Owner’s Manual 19 2 Make the requir ed vir tual connections in the DME Designer configuration win dow. • Connect the signal from th e four local mi crophones (Mic1 – Mic4) and the audio signal from the r emote location (From Of fice X) to the appropr iate inputs of the AEC component.
20 MY4-AEC Owner’s Manual 3 Adjust the DME Designer AEC component editor par ameters so that acoustic echo is ef fectivel y cancelled from the audio signal sent to Of fice X. Begin by checking that the connec tion with Office X is working pr operly and that conversation is possible.
MY4-AEC Owner’s Manual 21 Using one MY4-AEC card, multiple participants in two meeting r ooms can teleconference with two separate remote locat ions (“Office X” and “Office Y”). Referrin g to Example 1, use an oscillator component to determine the ideal microphone and speaker positions for each meeting r oom.
22 MY4-AEC Owner’s Manual Network Network Office X (Remote – Far End) Office Y (Remote – Far End) Teleconferen cing system Teleconferen cing system OUT (Analog) IN/OUT (Analog) Small Mee ting Ro.
MY4-AEC Owner’s Manual 23 2 Make the requir ed vir tual connections in the DME Designer configuration win dow. • Connect the sign al from the micr ophones in the small and medium local meeting roo.
24 MY4-AEC Owner’s Manual 3 In the Matrix Rout er section of the AEC c omponent editor , select one or more of the “F rom Far-end A – D signals” to be used as the ref erence for each AEC channel 1 – 4. The “On” buttons in the Matrix Rout er sect ion can be used to select microphones and locations for each meeting r oom.
MY4-AEC Owner’s Manual 183 Appendix Specifications GENERAL SPECIFIC A TIONS DIGIT AL INPUT/OUTPUT C HARA C TERISTICS Sampling Frequency 44.1kHz-10% to 48kHz+6%, 88.
184 MY4-AEC Owner’s Manual Dimensions 164.1 ( 12 ) 176.1 40 120 unit: mm.
MY4-AEC Owner’s Manual 185 * Specifications and de scriptions in this owner ’s manual are for inf or mation pur poses only . Y amah a Corp. reserves the right to change or modify pro ducts or specific ations at any time w ithout prior notice.
186 MY4-AEC Owner’s Manual Memo.
MY4-AEC Owner’s Manual 187 Memo.
188 MY4-AEC Owner’s Manual.
MY4-AEC Owner’s Manual 189.
190 MY4-AEC Owner’s Manual CAN ADA Y amaha Canada Music Ltd. 135 Milner Avenue, Scarborough, Ontario, M1S 3R1, Canada T el: 41 6-298-1311 U.S . A. Y amaha Corpora tion of America 6600 Orangethorpe Ave., Buena Park, Calif. 90620, U.S.A. T el: 71 4-522-9011 MEXICO Y amaha de México S.
MY4-AEC Owner’s Manual 191 DENMARK Y amaha Music Europe GmbH, T yskland – filial Denmark Generatorvej 6A, DK-27 30 Herlev , Denmark T el: 44 92 49 00 NORW A Y Y amaha Music Europe GmbH Germany - Norwegian Branch Grini Næringspark 1, N-134 5 Østerås, Norway T el: 67 16 77 70 RUS SIA Y amaha Music (Russia) Room 37, bld.
C.S.G., Pro Audio Division © 2011 Y amaha Corporation 109MWTO-A0 Printed in Japan WW75420 Y amaha Pro A udio global web site http://www .yamahaproaudio.
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