3. Block diagram
The following figure shows a block diagram of the ADDA 2402.
13
The peak meter can
store
the highest peak in a recording by pushing the analog input selector
rapidly twice. The diode for XLR or Jack will flash, and the highest peak will continue to
light up. To release the peak meter just press the analog input selector rapidly twice again
It is recommended to adjust the input signal to a maximum, peak value of –12dBFS. This
means that the meter normally reads out ‘green’ values. In this way a 12 dB headroom is
preserved, thus giving a nominal input level of +6dBu (1.55 V RMS). The meter will read
down to –60 dBFS, but still the A/D converter will have a dynamic range better than 116 dB
(A). With a 12 dB headroom, the noise floor will thus be below 104 dBrel(A) to the nominal
level of 6dBu (0dBrel).
24 bit
ADC
XLR
Amp
in+
in-
Amp
in
Jack
+18dBFs
Fast
Peak
data
clock
Input level L/R
+4dBFs
Analog Input Source:
-XLR input
-Jack input
Dither:
-24 bit
-20 bit
-18 bit
-16 bit
AES/EBU
Input
optical
Optical
input
AES/
EBU
AES/EBU
XLR
S/
PDIF
S/PDIF
Phono
clock
data
status
+
-
Digital Input Source:
-AES/EBU
-S/PDIF
-Optical
XLR
Jack
24 bit
DAC
Clock
data
status
de-
emphasis
Amp
Amp
out+
out-
out
data
clock
status
TOS
Link
AES/EBU
S/PDIF
S/PDIF
Optical
AES/EBU
XLR
S/PDIF
Phono
+
SRC
Option
+
-
data
clock
Analog Input Section
Analog Output Section
Digital Input Section
Fs = 32 kHz
44,1 kHz
48 kHz
64 kHz
88,2 kHz
96 kHz
Ext. sync
AES/
EBU
AES/EBU
Sync
XLR
+
-
osc
Sample Rate selection
File:adda_blok_2.vsd
Digital Master Clock
Analog Master Clock
Digital Output Source:
-Analog input
-Digital input
Digital Output Section
Digital Output Source:
-Analog input
-Digital input
