Tascam Computer Monitor DA 78HR User Manual

DA-78HR

Technical Documentation

PRODUCT OVERVIEW

The DTRS format has long been respected as the most

reliable format in digital recording, and now the DTRS

format is leading the way into high resolution 24 bit

recording. The DA-78HR works with 16 bit DTRS

machines, using the same DTRS Sync line for sample

accurate lock plus the ability to read and write the

older 16 bit format. However, the DA-78HR offers the

ability to write 8 tracks of 24 bit audio to tape in the

HR format, built in SMPTE synchronization, MIDI ports

for MTC and MMC, plus a built-in 8 channel digital

mixer for internal bounces or monitor mix generation.

• Records 8 tracks of 24 Bit Audio To Hi8 Tapes

• 24 Bit A/D and D/A Converters

• Reads and Writes 16 and 24 Bit DTRS Tapes

• 16 Machine Sample Accurate Lock with DTRS Sync

• Balanced DB25 & Unbalanced RCA Analog I/O

• TDIF Digital I/O & SPDIF Digital I/O

• Word Sync In/Out/Thru

• >104dB Dynamic Range

• 108 Minutes of Record Time on 120 Hi8 Tape

• SMPTE Time Code Generation and Chasing

• Generates MIDI Time Code

• Track Slip from -200 to +7200 Samples

• Built-In 8 Channel Digital Mixer

• Responds to MIDI Machine Control

APPLICATIONS

SPECIFICATIONS

The DA-78HR's high audio quality, long record time, rugged

reliability, built-in time code capabilities, built-in MIDI

capabilities, and affordable price combine into a product that

can handle numerous situations.

Specifications:

Format:

DTRS and DTRS-HR

Recording Method:

Tracking Method:

Maximum Record Time:

Time to Play from Stop:

Shuttle Speeds:

Varispeed:

Rotary Head / Helical Scan

ATF (Automatic Track Finding)

108 min (using P6-120 tape)

< 2 seconds

8x, 4x, 2x, 1x, 0.5x, 0.25x

±6%

Personal and Project Studios

Maximum features, minimum hassle. The DA-78HR brings

DTRS tape into 24 bit audio, offering the very best sound

quality available today. New features like built in MIDI ports

and SMPTE synchronization gives you the ability to chase other

tape machines (analog or digital), and the ability to work with

sequencers and digital consoles. For the ultimate cost effective

flexibility without having to locate additional accessories, the

DA-78HR is the best digital tape machine for the market.

Subcode:

SMPTE Frame Rates:

Independent ABS and SMPTE TC

30fps, 30dfps, 29.97fps, 29.97dfps,

25fps, 24fps

Error Correction:

Double-encoded Reed-Solomon code

Frequency Response:

Signal to Noise Ratio:

Total Harmonic Distortion:

Channel Separation:

20Hz-20kHz ±0.5dB

>104dB (HR), >100dB (Standard)

<0.004% (HR), <0.005% (Standard)

>90dB @ 1kHz

Sampling Frequency:

Recording Resolution:

Reference Level:

Crossfade Time:

Track Delay:

Word Sync Source:

A/D Converters:

D/A Converters:

44.1kHz, 48kHz

16 bit, 24 bit

-16dB (full bit)

10ms to 200ms (10ms increments)

-200 to +7200 samples

(set in samples or msec)

Internal, Word, SPDIF

24 bit, 128x oversample (selectable dither)

24 bit, 128x oversample

Live Performance and Recording

In live performance, there is no take 2. Whether you are

using the DA-78HR to play some additional backing tracks or

recording the performance live, you can count on the DA-78HR

to get it right the first time. With 108 minutes of record time

on a single tape, you can put a whole live song set on a single

tape; no need to stop everything so you can switch tapes.

Analog Inputs:

DB25, +4dBu, 20kOhm

(8x) RCA, -10dBV, 10kOhm

DB25, +4dBu, 10kOhm

(8x) RCA, -10dBV, 250 Ohm

TDIF-1 Format, RCA Coaxial SPDIF

DTRS Sync DB15

RCA, 0.5Vp-p to 10Vp-p, 10kOhm

RCA, 2Vp-p, 100kOhm

Auto Terminating BNC, 75 Ohm (TTL)

BNC, 75 Ohm

Analog Outputs:

Audio for Video on a Budget

Digital I/O:

For anyone trying to make music for television or film, the

DTRS format is the de-facto standard format for transfers

and many stages of recording. The synchronization features

will allow you to chase another audio machine, or a video deck.

Again, the 108 minute record time was maintained for the new

24 bit recording mode, allowing 1 hour reels to be stored on a

tape, along with reference tones and the independent subcode

time code track. More advanced video applications will want

a DA-98HR, which adds 9 pin control, blackburst resolve, and

built in bit split for higher resolution audio recording.

Remote/Sync:

Time Code In:

Time Code Out:

Word Sync In/Thru:

Word Sync Out:

MIDI I/O

In, Out, Thru

1/4" phono (For TASCAM RC-30P)

Punch In Port:

Dimensions:

Weight:

Power Requirements:

482x143x350mm, 19" x 5.6" x 13.8"

8.1kg, 17.8 lbs

USA/Canada 120VAC, 60Hz

UK/Europe 230VAC, 50Hz

Australia 240VAC, 50Hz

34W

Power Consumption

Electromagnetic Environment: E4

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7733 Telegraph Road

•

Montebello, CA 90640

•

(323) 726-0303

•

http://www.tascam.com

DA-78HR_TECHDOC.pdf

032500

All features and specifications are subject to change without notice. Contact your local TASCAM representative for the latest information.

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DA-78HR Technical Documentation

ANALOG DB25 PINOUT

START-UP MESSAGE

The analog DB25 pinout on the DA-78HR is the exact same

as on the other DTRS machines. While these cables are

readily available in your local retail outlets, the pinout is

listed here for users wishing to make custom cables and

snakes.

The DA-78HR displays TASCAM HR across the meters

when it first boots up. For users who want to customize

their recorder, this message can be changed to display

your name, the name of your studio, or anything else.

1) Turn the power on.

2) Press SHIFT so the SHIFT LED lights

3) Press HR MODE and MENU a few times until the counter

displays "mAintn2".

G C H G C H G C H G C H G C H G C H G C H G C H

4) Press SUB MENU to advance to "mSGEdit" The counter

will display "1. T" (T will scroll through the meters.)

5) Press the UP and DOWN arrows to change the letter.

(Some letters cannot be displayed in the counter, but

will show up in the meters.)

G = Ground

H = Hot (+)

C = Cold (-)

6) Press SHIFT and UP to advance to the next letter.

7) Select "End" from the characters to end your message.

Advancing one more time will display "PrEViEw" in the

counter as your new message scrolls.

8) Press SHIFT to finish.

FRONT AND BACK PANELS

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