Tascam Da-45hr Technical Documentation Manual

							Technical Documentation
DA-45HR
The DA-45HR is the worlds first 24 bit DA T recorder,providing a cost effectiv e high resolution mastering solution.  The DA-45HR can also oper ate in a standard16 bit DAT resolution, pro viding seamless backw ardscompatibility with other DA T recorders.  A full audioI/O complement and word sync in/thru pro vide all the tools to integrate into any analog or digital studio of any siz e.  Perfect for studios and mastering houses, the DA-45HR bridges the gap between the 16 bit and 24 bit worlds with a familiar interface y ou already know.
                                       7733 T elegraph R oad    •   Montebello , CA 90640    •   (323) 726-0303    •   http://www .tascam.comAll features and specifications are subject to change without notice.  C\
ontact y our local TASCAM representativ e for the latest information.Page 1 of 3DA -45HR_TECHDOC.pdf032800
• 3-U R ack Mount Design
• R ecords 16 or 24 bit High R esolution Mode
• 24 bit A/D , 20 bit D/A
• Analog Unbalanced RCA I/O
• Analog Balanced XLR I/O with Output A ttenuation
• AES/EBU (XLR) and SPDIF (Coaxial) Digital I/O
• W ord S ync In/Thru
• Supports T rack Names in DA T Subcode
• T wo Memory Locate P oints
• Single Pla y and Loop Pla y Functions
• Margin Counter with R eset Function
• Large Jog/Shuttle Wheel
• Selectable SCMS Status
• Headphone Output w/ Lev el Control
• P ar allel Control I/O for Custom R emotes & Tallies
• Optional Wired R emote (RC-D45)
PRODUCT OVERVIEW
The DA-45HR combines offers all the adv antages of a studio grade DAT recorder , and adds the additional capabilities of 24 bit high resolutionaudio. 
Project Studio - Production Studio
While 16 bit mass distribution at 24 bit resolution is being promised in the near fut\
ure.Mixing y our projects down on 24 bit masters now will help y ou capitalizeon higher resolution re-releases down the road without ha ving to go backto the studio to remix the tracks.  In fact, a number of mix engineers have specified the 24 bit DA T format as their delivery method, and manymastering houses are equipped with DA -45HRs to accept the 24 bit maters.
With the proliferation of high DA-78HR and DA -98HR and 24 bit digital audio workstations, the need for high resolution mastering recorders is all the more obvious.  
Since DATsev erywhere, the abilit y for the DA-45HR to double as a standard 16 bit DA T with total backwards compatibilit y offers a cost effectiv e solution to bring the best of both worlds into the studio .
For studios that k eep the audio totally in the digital domain, the DA -45HRoffers AES/EBU and SPDIF coaxial ports, as well as word sync in/thru for\
locking to external word clock sources.  These adv anced features will provide all the amenities to integr ate into any digital or analog studio ofany siz e.
Radio Broadcast - Show Control
For broadcast and show control applications,I/O on the back panel for custom remote control.  The DA -45HR offers full compatibility with DAT tapes recorded in long pla y, standard modes, or24 bit high resolution.  Plus, when creating y our sound cues, the DA-45HR is the best sounding, most flexible recordable 24 bit format a vailable.  Thismeans y ou can customiz e your shows as time goes on, without ha ving tore-press DVDs or some other locked, closed end format.
APPLICATIONS
Performance Specifications:Tape Speed:R ecording Time (120 DA T):Recording R esolution:Recording Sample R ate:Frequency Response:Signal to Noise R atio:
Total Harmonic Distortion:
W ow and Flutter:Channel Separ ation:Input RCA:
Input XLR:
Output RCA:
Output XLR:
AES/EBU I/O:SPDIF Coaxial I/O:Headphone Output:Word S ync IN/THRU:Control P orts:
General Specifications:Power R equirements:
Power Consumption:Dimensions:
W eight:Optional Accessories:
SP - 8.15mm/s;  HR - 16.3mm/sSP - 120 minutes;  HR - 60 minutesSP - 16 bit;  HR - 24 bit44.1kHz, 48kHz20Hz -20kHz  ±0.5dB (SP & HR modes)>105dB Pla yback (SP)>112dB Recording, 105dB Ov erall (HR)
						

							DA-45HR Technical Documentation
                                       7733 Telegraph R oad    •   Montebello , CA 90640    •   (323) 726-0303    •   http://www .tascam.comAll features and specifications are subject to change without notice.  C\
ontact y our local TASCAM representativ e for the latest information.Page 2 of 3DA -45HR_TECHDOC.pdf032800
Control I/O Notes:
All labeled in on the chartat left.  Commands areactiv e when brought to ground for 30 msec or more.
Tally signals collector , with a maximum 15V, 80mA.
SERIAL in (7) access to RS-232 t ypecommunication standards.
Control I/O Legend
13572468
1012149111315
24 BIT DAT FAQ
How does the 24 bit DAT format work?The 24 bit format DA T uses the same DAT tape that is used in standard DA Trecorders.  In order to store the extr a data generated by higher resolution recording, the tape speed is doubled in HR (High R esolution) mode.  So, when youre recording in 24 bit HR mode, a standard 120 minute tape willlast 60 minutes.  Obviously , 24 bit DAT tapes will only pla y back on a 24 bit DAT recorder lik e the DA-45HR.
How can I work with other users who dont have a 24 bit DAT?The DA-45HR can also run just lik e a standard 16 bit DAT recorder, runningnormal speed and writing 16 bits to the tape.  R eading and writing is fullysupported, so you wont have to dig out a different DA T recorder for anything else.
How can I make duplicates of a 24 bit DAT?This all depends on what y ouve got in y our studio .  If you ha ve a 24 bit DA W or multitr ack, you can dump tr acks back and forth that w ay, howev erthese devices ma y not support track IDs, track names, and other subcode data.  Obviously , you can use two DA -45HRs to make real time copies toduplicate everything on the tape.  The other choice is to use a T ASCAM DA -302 dual well DA T recorder.  While the DA -302 is not equipped to record or play back 24 bit DA T tapes, it can duplicate them as a str aight data transfer between tapes.
Track NamesThe DA -45HR fully supports progr am titles, allowing eachtrack to ha ve its own name.  This information is stored inthe tapes subcode, and does not affect the audio qualit yor cause conflicts with other machines.  The name can bespelled out with upper and lower case letters, numbers, and some basic punctuation.
Two Memo Locate PointsWhen working on mixes, or even running liv e shows, apair of memo points comes in handy .  These are separatelocate points that can be used for cueing the tape to aparticular location, or they can be used for looping a partfor rehearsal or critical listening passes.
Single PlayIf you are using the DA -45HR in a live production, the single play function allows y ou to play the DAT one trackat a time.  The DA -45HR will automatically stop at the next track ID, ready for the next cue.
Margin CounterThis is one of those features y ou typically nev er think about until y ou dont have it.  The margin counter is v eryuseful when performing transfers.  You can walk away from the unit, and know if the lev el ever peak ed out, orif the recording could ha ve been made louder .
Drum Time (Head Time) CounterFor maintenance purposes, it helps to know if it is timeto clean the heads.  Maintenance records can be k ept just like taking the odometer reading on car .
Selectable Reference Level, Attenuation on OutputsMost professional gear operates with -20dB as the 0dBanalog reference level, and most semi-pro gear oper atesat -16dB reference level.  The DA-45HR offers the abilit yto properly match your system to the gear y ou are working with.  There are also attenuation pots on the balanced outputs for fine adjustment of these lev els.
The DAT recorder shall be able to record audio DA T tapes at the standard16 bit, 44.1kHz and 48kHz modes.  Playback capabilities shall include thesesample rates, as well as 32kHz long pla y format.
ADAT tape.  This high resolution mode shall support both 44.1kHz and 48kHz \
sample r ates.
The recorded SCMS code status options shall include Prohibit, One Gener ation, and Free.  Other menus shall provide customization of the A uto ID parameters, controlling thethreshold and times required for triggering an auto ID writing.
Theretrieval, including the abilit y to read and write progr am titles, program IDs, and markers for skip progr am and end of progr am.
Advanced cueing controls shall include single pla y, two memory locationpoints, and looping between memory ID points.
AnalogXLRs and unbalanced RCA connections.  Digital audio inputs andoutput shall be pro vided on AES/EBU format on XLR connectors,and in SPDIF format on coaxial connectors.  W ord sync in and thru ports shall be provided for easier integr ation into larger digital en vironments.
The zero dB reference adjustable between -16dB , -18dB and -20dB.  Additionally, the balanced outputs shall offer attenuation adjustment potentiometers.
Thecontrol, and shall offer a P arallel I/O port for further remote control andtally functions. 
Thetaking three spaces in height.  Dimensions shall be 19 x 5.5 x 14.5(W x H x D).
Metric measurements: 482x140.5x368mm
The DAT Recorder
NOTE: This text is available in a standard text file on TASCAMs Sound C\
CD-ROM.  Contact TASCAM for details.
Pin123456789101112131415
FunctionST OP inPLA Y inFFWD inREW inPA USE inREC PLA Y inSERIAL inGNDPLAY tally outFFWD tally outREW tally outSTOP tally outREC PLA Y tally outPA USE tally outTAPE END tally out
CONTROL I/O
ARCHITECTS SPECIFICATIONSHELPFUL FUNCTIONS 
						

							DA-45HR Technical Documentation
                                       7733 Telegraph R oad    •   Montebello , CA 90640    •   (323) 726-0303    •   http://www .tascam.comAll features and specifications are subject to change without notice.  C\
ontact y our local TASCAM representativ e for the latest information.Page 3 of 3DA -45HR_TECHDOC.pdf032800
FRONT AND BACK PANELS
OPTIONAL REMOTE