Apogee Rosetta AD User manual

The Apogee Rosetta AD — Specifications
Analog and A/D Converter
Parameter Value Units
Resolution 24 bits
Sample Rate 44.1–48, 88.2–96 kHz ±10%
Input Impedance
Pro 9K Ω
Consumer 15K Ω
Relative THD+N
–0.1 dBFS –110 dB (unweighted)
–112 dB (A-weighted)
–20 dBFS –91 dB (unweighted)
–93 dB (A-weighted)
–60 dBFS –56 dB (unweighted)
–58 dB (A-weighted)
Dynamic range
–60 dB, Unweighted 116 dB
–60 dB, A-weighted 119 dB
Peak Spurious Component –126 dB (max)
Group Delay (in passband) 34/Fs seconds
Passband Ripple ±0.001 dB
Digital Filter Stopband 0.5542Fs kHz
Stop-band Attenuation 117 dB
Channel Separation
Left/right 120 dB (worst case)
Frequency Response (10 Hz–20 kHz)
Gain ±0.025 dB
Phase < 0.01 degrees
Common-Mode Rejection Ratio
60 Hz >> 100 dB
1 kHz >> 80 dB
Input Level, maximum (no gain)
Professional, balanced 27 dBu
Parameter Value Units
Professional, unbalanced 23 dBu
Consumer, balanced 16 dBu
Consumer, unbalanced 15 dBu
Input Level, adjustment range 20 dBu
Crystal Oscillator accuracy ±50 ppm
Clock Jitter, 32kHz–106 kHz << 22 psec
Digital Signal Processing
UV22HR Amplitude
16 bits –84 dB
20 bits –108 dB
Over Detection 1–4 consecutive 0 dBFS readings
(user-definable)
System
AC line voltage 100, 120, 220, 240 vac (set internally)
Fusing 5 x 20 mm, 800mA (100–110v); 400 mA (220–240v) slow-blow
Power 15 Watts
Size (w, h, d) 19 in, 1.75 in (1U), 14.25 in
Weight 6 lb (2.7 kg)
The Specifications above, and other information provided in this
brochure, are subject to change without notice. Apogee Electronics
Corporation reserves the right to make design changes without prior
warning. Apogee, UV22, Soft Limit, AMBus, Clocked by Apogee,
Apogee Bit-Splitting and the “96k” device are trademarks or regis-
tered trademarks of Apogee Electronics Corporation. Other trade-
marks are the property of their respective owners.
The Heart of Digital Audio.
A POGEE E LECTRONICS C ORPORATION , 3145 Donald Douglas Loop South, Santa Monica, California 90405-3210, USA.
Telephone: [phone]. Fax: [phone]. Email: [email protected]
For full details and application notes on all Apogee Electronics products, visit our Web site at http://www.apogeedigital.com/
Photography by David Norwood
Created by Richard Elen
Printed in U.S.A.
RosettaAD/5M/1198
The Apogee Rosetta AD features clean, uncluttered front and rear panels. At the rear of the unit, all interfaces are easily accessible.
The analog inputs may be balanced or unbalanced, pro or consumer levels. At standard 44.1 and 48 kHz sample rates, both AES ports
are available: at 88.2 and 96 kHz both ports are used to create 2-channel path.
The highest quality you can afford.
The Rosetta AD’s frequency
response (shown left, Fs=48 kHz)
and Total Harmonic Distortion plus
Noise (right) show the exceptional
performance of this unit. The
Rosetta AD not only out-performs
other converters in its price range:
it out-performs converters costing
many times more. This is the
Apogee tradition.
Rosetta AD Brochure 12/2/98 12:52 PM Page 1

The Rosetta AD – Your Analog to Digital Solution.
NOW YOU CAN AFFORD to bring world-
class audio quality to your digital
recordings: install an Apogee SOLUTION
SERIES converter in front of your DAT recorder,
MDM or DAW, or on the output of your analog
console.
For over a dozen years, Apogee Electronics has set the
standards in digital audio. From the first high-definition
filter designs to the latest high-end, high-resolution, high
sample-rate converters, Apogee has led the field.
For our next products, we decided to set our engineer-
ing department some new and challenging goals. They
were to design a new line of conversion products
especially for the project studio owner. It should be made
available at a lower price point, but without risking the
quality—there was no way would we consider compromis-
ing the unique sound of an Apogee converter simply to
meet a price.
The result is Apogee’s new SOLUTION SERIES™.
No-compromise conversion products, true Apogee quality,
tailor-made for your project studio, at a price you can
easily justify. Now everyone can own an Apogee—begin-
ning with the astonishing ROSETTA™AD 24-bit, 2-channel
analog to digital converter.
The Rosetta AD is a 24-bit analog to digital converter
with all the most common digital interfaces—AES/EBU,
ADAT, TDIF and S/PDIF—included as standard.
The feature set of the Rosetta AD has been carefully
tailored to project studio requirements. You
won’t pay for extensive features you’ll
never use: we carefully researched
exactly what facilities you need and
expect from an outboard A/D
converter… and deliver them
in an affordable, compact,
1U rack-mount package.
The Rosetta AD
features analog
inputs operating at pro or consumer levels, balanced or
unbalanced. The highest quality Apogee 24-bit conversion
drives two AES/EBU outputs so you can feed two
machines at once. In addition, ADAT, TDIF, and S/PDIF
coax/optical interfaces are all built-in, for the absolute
maximum in quality and flexibility!
Choose the standard version, with 44.1/48 kHz sample
rates; or go for gold with the 96 kHz version, offering 44.1,
48, 88.2 and 96 kHz sample rates. You can even upgrade
from one to the other.
Apogee’s renowned Soft
Limit® technology allows you to
record at the maximum level
without overs, and our new high-
resolution UV22HR® process
allows you to generate flawless
16- and 20-bit masters retaining
as much of the original 24-bit
resolution as possible.
Apogee’s exacting analog and
digital design assures top audio
performance without compro-
mise, including excellent stereo
imaging and the unique, transpar-
ent Apogee sound.
The Rosetta AD at a glance
• High quality Apogee 2-channel 24-bit A/D conversion
at an affordable price.
• 44.1/48 or 44.1/48/88.2/96kHz versions
• Ideal for project studio recording and mastering to
DAT, MO or modular digital multitracks
• 2xAES/EBU, S/PDIF, ADAT, TDIF interfaces
• UV-22HR Improved high-resolution word-length
reduction to 16 and 20 bits
• Pro/consumer levels, balanced/unbalanced
• User-defined over indication
• Simple to operate, stylish front panel
• Easy-to-read bar-graph metering.
The standard Rosetta
AD offers 44.1 and
48 kHz sampling,
while the high-density
“Rosetta 96” adds
88.2 and 96 KHz
rates. You can even
upgrade to 96 later!
What’s In A Name?
The Rosetta Stone,
discovered by Napoleon’s
soldiers in Egypt in the
18th century, provided
the key to translating
the mysterious hiero-
glyphs of the Ancient
Egyptians. In the
same way, Apogee’s
Rosetta AD is the key
to flawless translation of
analog signals into
multiple digital formats.
UV22HR—New & Improved
Although the Rosetta offers 24-bit resolution, there
are still plenty of applications that don’t need—or allow—
that level of resolution. CD, DAT and MDMs are still gen-
erally 16-bit, or 20-bit at most.
Our solution: UV22HR, the latest “high resolution”
development of our industry standard UV22 word-
length reduction system, used on most top US CD
releases. UV22HR preserves even more of the orig-
inal resolution than before. You enjoy the true
theoretical noise floor at your chosen word
length, but, like analog, you can hear significant
extra detail below the noise. UV22HR makes digital
sound more like analog—without the drawbacks.
The panel of the Rosetta AD is designed for quick and
easy operation. Every function has its own control, clearly
labeled to avoid confusion. The metering features easy-to-
read bar-graph LEDs with oversize “over” indicators—and
you can determine how many consecutive digital full-scale
samples constitute an over.
Try the Rosetta AD at your Apogee dealer today. You’ll
find it the perfect future-ready tool for translating analog
signals to digital—without compromise—at a price you
can afford.
The quality of Apogee converters is the foundation of
our reputation. We just made it easier to own one.
The Rosetta AD includes all
the most common standard
industry digital interfaces—
ADAT, TDIF, AES/EBU and
S/PDIF (optical and coax).
It’s the ideal front-end for all
your digital gear, from CD
and DAT recorders to
modular digital multitracks;
from computers to video
editors (see below).
Interfacing your present or
future gear is a snap!
Rosetta AD Brochure 12/2/98 12:55 PM Page 3