Tascam DA-98HR Owner's Manual

Also see for DA-98HR: Setup guide Service manual

Contents

Tascam DA-98HR Owner's Manual Manual pdf 9 page image

1 – Introduction to the DA-98HR–Notes and precautionsTASCAM DA-98HR 9that you make a note of these, to prolong the usefullife of the DA-98HR.1.4.1 Clock source in a digital studioThe DA-98HR can be used in a variety of situations,and with a variety of equipment, either digital or ana-log.If you are working with more than one digital audiounit in your setup, you should note that all units mustbe driven by the same central clock source (“wordclock” or “word sync”).If different word clock sources are used throughoutthe setup, it is actually possible to damage speakers,etc. because of mismatches.The DA-98HR can be designated as the word clockmaster for your studio, or can be slaved to externalword clocks, using a convenient front-panel switchand standard BNC connectors.Even though AES/EBU stereo digital audio signalsare self-clocking, any AES/EBU format signals fedto or from the DA-98HR must be synchronized atword level with the DA-98HR.1.4.2 Confidence replayBecause the DA-98HR can accept digital data at dif-ferent sampling frequencies, and the word length ismay be either 16 or 24 bits, monitoring the inputsource during recording will not necessarily providea completely accurate representation of what isrecorded on tape.The DA-98HR provides a dither setting (7.12.1,“Selecting dither settings”) which provides improvedtotal harmonic distortion figures for 16-bit recording.Since the dither is applied prior to recording, again,monitoring the input source will not allow you tohear the effect of the dithering process.Accordingly, the DA-98HR provides a confidencemode, allowing you to monitor off-tape as recordingprogresses. Since this monitoring is not synchronizedexactly with the source inputs, gapless punch-in andpunch-out is not possible in confidence mode. Forfull details of confidence monitoring, together withother monitoring modes available on the DA-98HR,see 5, “Monitoring modes”.1.4.3 Environmental conditionsThe DA-98HR can be operated in most environ-ments, but we suggest that you keep the environmen-tal conditions within the following limits:Ambient temperature between 5° and 35° C (41°and 95° F).Relative humidity should be between 30% and 80%non-condensingThere should be no strong magnetic fields (speakers,etc.) near the DA-98HR.Avoid spraying polish, insecticides, etc. near the DA-98HR.NOTEIf you need to clean the DA-98HR, use a soft cloth, moist-ened if necessary with a little detergent and water. Do notuse abrasive cleaners or solvents such as alcohol orthinner.Avoid subjecting the DA-98HR to jolts, suddenshocks, etc.NOTEIf you have to return the unit for service or repair, use theoriginal packing materials if possible. If the unit is to betransported to a recording location, etc., use a suitabletransport case with sufficient shock protection.TASCAM does not accept responsibility for damageresulting from neglect or accident.1.4.4 Installing the DA-98HRThe DA-98HR may be installed in a standard 19”rack, occupying 4U of space. Since the DA-98HR isquite heavy (around 11kg – 24lb), your rack shouldbe strong and stable to take the weight of the DA-98HR.The DA-98HR should be mounted with the frontpanel vertical.1.4.5 Electrical considerationsMake sure that your local power supply matches thevoltage requirements marked on the rear panel of theDA-98HR.If you are in any doubt concerning the local powersupply, consult an electrician.