Alesis EC-2 - Manuals - manualsarea.com

Page 3 - appendix A; EC-2 96kHz Upgrade Cards; Table of Contents; Index

appendix A EC-2 Manual A-1 EC-2 96kHz Upgrade Cards This document covers only those aspects unique to the EC-2 cards and should be kept with the HD24 manual. Table of Contents Important Safety Instructions ................................ 2Safety symbols used in this product ....................... ...

Page 4 - Important Safety Instructions; Support for Sample Rates up to 96kHz.; Simple hookup and operation.

EC-2 96kHz A/D/D/A upgrade • appendix A A-2 EC-2 Manual Important Safety Instructions Safety symbols used in thisproduct This symbol alerts the user that there are important operating and maintenance instructions in the literature accompanying this unit. This symbol warns the user of uninsulated vol...

Page 5 - Installing the EC-2 into the HD24; Precautions

appendix A • EC-2 96kHz A/D/D/A upgrade EC-2 Manual A-3 Installing the EC-2 into the HD24 Precautions The EC-2 boards should only be installed by a dealer or trained technician. End users should only attempt installation if they have experience with this type of procedure. If any of the following in...

Page 6 - A n a n t i - s t a t i c; Remove the cover from the HD24; Remove the existing converter PCBs; Locate the existing DC power cable; Drive 1; Main PCB

EC-2 96kHz A/D/D/A upgrade • appendix A A-4 EC-2 Manual Prepare to install: 1 . Disconnect the HD24’s AC power cable, andmake sure you are working on a clean, flat, hardsurface. Ground yourself by touching agrounded metal object. A n a n t i - s t a t i c workstation with anti-static mat and wristst...

Page 7 - Install the new EC-2 PCBs; HD24 with EC-2 installed; Daughterboard PCB

appendix A • EC-2 96kHz A/D/D/A upgrade EC-2 Manual A-5 Install the new EC-2 PCBs 7. Find the daughterboard in the EC-2 package: ithas two 26-pin flexible cables attached to it.Insert the ribbon connector labeled “J4 TOMAIN PCB” on the daughterboard into the 26-pin header labeled on the main PCB as ...

Page 8 - Connect the PCBs; Operation; analog

EC-2 96kHz A/D/D/A upgrade • appendix A A-6 EC-2 Manual Connect the PCBs 1 3 . Connect the daughterboard to the Input andOutput PCBs: Line up the connectors to the bottom (D/A) and top (A/D) PCBs, make sureall the pins line up, then gently push thedaughterboard to the rear of the HD24 using theplast...

Page 9 - Synchronizing at high sample rates:; Inputs and Outputs

appendix A • EC-2 96kHz A/D/D/A upgrade EC-2 Manual A-7 Synchronizing at high sample rates: To record more than 12 tracks in the high samplerate mode, simply synchronize two HD24/EC-2units together by linking them with an ADAT Synccable (see page 24 of the HD24 manual). Up to fiveHD24s may be synchr...

Page 10 - The converter defines the sound; The case for a higher sampling rate; Antialiasing filters

EC-2 96kHz A/D/D/A upgrade • appendix A A-8 EC-2 Manual About the EC-2’s audioperformance An HD24 with the EC-2 upgrade has audioperformance far superior to that of any analogrecorder, and a wider dynamic range than mostinput and output devices that may be connected toit. Here’s why: The converter d...

Page 11 - Digital oversampling filters

appendix A • EC-2 96kHz A/D/D/A upgrade EC-2 Manual A-9 aliasing, the steeper the filter, the better. Someconverters boasted 10 th -order (-60 dB per octave) filters. For comparison, most loudspeakercrossovers have 3 rd or 4 th -order filters (-18 or –24 dB per octave). The problem is similar on the...

Page 13 - Basic Recording and Playback

appendix A • EC-2 96kHz A/D/D/A upgrade EC-2 Manual A-11 Using the HD24/EC-2 withcomputer workstations anddigital mixers Because the EC-2 upgrade provides 24 high qualityinputs and outputs, it can be used as an externalconverter to extend the number of analog inputsand outputs of any computer workst...

Page 14 - Word clock

EC-2 96kHz A/D/D/A upgrade • appendix A A-12 EC-2 Manual Using the HD24/EC-2 with theAlesis AI-4 AES/EBU Interface The Alesis AI-4 AES/EBU Digital Audio Interface isa single-rack space unit available from your Alesisdealer that lets you connect ADAT Optical inputand output signals to industry-standa...

Page 15 - Specifications; AUDIO INPUT

EC-2 Manual A-13 Specifications For the Alesis HD24 with EC-2 96 kHz Sample Rate Upgrade A/D andD/A Converter Boards: AUDIO INPUT Input Connectors: 24 balanced 1/4" TRS jacks Nominal Input Level: +4 dBu (1.23 V RMS ) = -15 dBFS Maximum Input Level: +19 dBu (6.9 V RMS ) = -0 dBFS Input impedance:...