DK-Audio PTO200C, User Manual

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MSD/PT0600/200 - Technical Reference Manual 5
4. Hardware
The MSD has been designed with the very best
technology available today ensuring superb per-
formance, high flexibility and an outstanding audio
performance.
4.1 Analogue Audio Inputs
The Analogue Input is designed around a 24-bit
Analogue-to-Digital converter (ADC) AKM®. This
converter, the AK5383, is using AKM’s high per-
forming dual bit S/D conversion type to obtain a
dynamic range close to 110 dB. Combined with a
transformer-balanced input stage it forms a very
high performance Input stage. The analogue input
on all supported MSD models is able to handle
+24 dBm input signal.
4.2 Digital Audio Inputs
All supported MSD models are using the same
Digital Audio Input circuit designed around the
Cirrus Logic® AES-3 receiver chip, the CS8420.
This AES-3 receiver has not only become an indu-
stry standard but also contains the Sample Rate
Converter (SRC) used by the MSD. The SRC
ensures correct synchronisation of all AES-3 input
sources, making it possible to source to several
asynchronous AES-3 streams simultaneous.
The CS8420 is able to lock on any sample rate
between 32 kHz to 96 kHz and convert it to the
used internal sample rate of 48 kHz (when no
external sync source is used).
The Input stage to the AES receiver is transformer-
balanced according to the AES specifications. This
AES-3 Input stage will generally also interface to
the consumer S/P Dif format when grounding one
of the balanced AES-3 input terminals. However,
since the signal level (eye-pattern) of a S/P Dif is
not compatible with the AES-3 specifications, there
is no guarantee for an error free reception.