3
11
DRAWMER
A
A
A
A
A
2
2
2
2
2
D
D
D
D
D
2
2
2
2
2
DMS-3: AES GRADE 1 DUAL OUTPUT A/D CONVERTER
Input Level for 0dBfs:
Two input level modes are available: In
installations with fixed input levels,
Calibrated
, recessed left/right, 20 turn
pots give precise input levels where very
little setup is required. In situations where
adjustments have to be made “on the fly”
standard
Variable
left/right controls are
provided.
6
1
Output Sample Rate:
Independantly sets the sample rates for
Output 1 7
and
output 2 8
from
44kHz
through to
192kHz
, plus
EXT
clock
9
. A
lock
led shows the strength of the incoming
external clock.
2
Word Length:
Independantly sets the
Word Length of
Output 1 7
and
output 2 8
to either
16 bit Dither
or
24 Bit
.
3
On Led:
A LED to show that the unit has power.
4
Output Meter:
V.U. output meter with 24 segment LED
per channel plus Overload - ranging from
-50dB to 0 db.
5
Analogue Input:
Individual Left/Right Balanced analogue
inputs.
6
Digital Output 1:
One each of
S/PDIF
,
TOSLINK
or
AES
simultaneous outputs. The sample rate is
selected via
2
.
7
Digital Output 2:
One each of
S/PDIF
,
TOSLINK
or
AES
simultaneous outputs. The sample rate is
selected via
2
.
8
INTRODUCTION
Microphones are analogue, speakers are analogue, storage is mostly digital
and signal processing can be either analogue or digital, software or hardware
based. At some point in the signal path, a high quality Analogue-to-Digital
converter is required, which faithfully reproduces analogue signals in the digital
domain. Step up the Drawmer A2D2...
The A2D2 is a stereo A/D converter giving simultaneous dual stereo outputs at
different selectable sample rates from 44.1kHz to 192kHz - so it is possible to
have a main output at, say 192kHz with another at 44.1kHz as a low resolution
copy.
CHAPTER 1
1
2
3
5
7
8
9
10
4
Wordclock Input:
The
EXT Wordclock
input for both
sample rate converters.
9
Wordclock Outputs:
Three wordclock outputs provided. The
sample rate is determined by O.S.R.1
2
.
10
IEC and Fuse:
The mains IEC inlet and fuse holder.
11
Features:
Dual input configuration allows either a fully variable input level from -2dBu to +28dBu via front
panel rotary controls or 24 turn precision presets for a fully calibrated input.
Accurate 24 segment peak reading LED bar meters show incoming signal levels from -50dBfs to
0dBfs plus separate overload LEDs.
Each digital output has selectable word length of 16 or 24 bits, with automatic dither generation.
The internal low jitter clock generator is Grade 1 AES standard.
External clock input.
3 word clock outputs to allow the A2D2 to act as master clock generator.
Burr Brown analogue input stages.
The A2D2 uses a linear power supply to minimise interference with the internal clocks.
Summary of Contents for A2D2 DMS-3
Page 5: ...5 SIMPLE CONNECTION GUIDE ...
Page 9: ...9 BLOCK DIAGRAM Ref 1v01 B 09 09 08 ...
Page 10: ...10 ...
