Technical data

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88
Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 16
20
Bi-directional Format Conversion between
ADAT
TM
and AES3
This setting is a special function of your MC-4! It allows to receive an
ADAT
TM
signal with up to 50.0kHz sampling rate and an 8-channel AES3
signal between 25.0kHz and 200.0kHz simultaneously. The ADAT
TM
input
signal is converted to AES3 and the AES3 input signals are converted to
ADAT
TM
or ADAT
TM
/ SMUX2/4, depending on the clock rate of the incoming
AES3 signal. The format of the optical outputs is displayed in the »STATUS«
menu.
In this mode, the MC-4 is able to work simultaneously with two different
sampling rates, each within the above mentioned frequency ranges. There-
fore, the system uses two PLL synthesizers to lock the incoming ADAT
TM
and
AES3 signals with their individual clock rates. The status of the PLLs is dis-
played in the »STATUS« and »REF CLOCK
IN« menus. To distinguish between
the two PLL states, the two blue »LOCK« LEDs and the two raws of red »REF
CLOCK IN« LEDs are marked with small numbers »1« and »2«. The num-
ber »1« indicates the state of the first PLL synthesizer which is standardly
connected to the incoming ADAT
TM
audio signal. Number »2« indicates the
state of the second PLL synthesizer which is standardly connected to the
incoming AES3 audio signal. To make this more clear, we have also marked
the two involved audio formats with small numbers: »ADAT
1
« and »AES3
2
«.
Bi-directional Format Conversion between
ADAT
TM
/ SMUX2 and AES3
This setting allows to receive an ADAT
TM
/ SMUX2 signal with clock rates
between 50.0kHz and 100.0kHz and an 8-channel AES3 signal simultane-
ously. The format conversion procedure is the same as described above. The
sampling rates of the incoming audio signals and the format of the optical
outputs are displayed in the »STATUS« and »REF CLOCK IN« menus.
Bi-directional Format Conversion between
ADAT
TM
/ SMUX4 and AES3
This setting allows to receive an ADAT
TM
/ SMUX2 signal with clock rates
between 100.0kHz and 200.0kHz and an 8-channel AES3 signal simultane-
ously. The format conversion procedure is the same as described above. The
sampling rates of the incoming audio signals and the format of the optical
outputs are displayed in the »STATUS« and »REF CLOCK IN« menus.
Due to the fact, that this is a format
conversion mode only, it is impera-
tive that all AES3 signals are of
same sampling rates!
!
To allow for the ADAT
TM
or
ADAT
TM
/ SMUX2 format conversion
without SRC into AES3 and vice
versa, the MC-4 needs to derive valid clock
signals from the incoming audio sources.
Therefore, it is a must to activate one
of the AES3 inputs »IN1 – 4«, the default
setting is »IN1«. The reference »ADAT« or
»ADAT
TM
/ SMUX2/4« is standardly activated
due to the selected conversion mode and
can not be changed in this mode.
!
Please refer to the grey box »SMUX2 +
SMUX4« on page 16 for details about
SMUX2, SMUX4 and the ADAT
TM
– AES3 chan-
nel splittings.
X-SRC
12
BI-DIR
UNI-DIR ADAT
1
SMUX4
1
SRC
REFERENCE
IN 3
IN 2
IN 1
IN 4
SMUX4
SMUX2
ADAT
AES3
88.2
48.0
44.1
32.0
192.0
96.0
176.4
MODE
SMUX2
1
AES3
2
AUDIO IN
S/PDIF
S/PDIF
AES11
WCLK
X-SRC
12
BI-DIR
UNI-DIR ADAT
1
SMUX4
1
SRC
REFERENCE
IN 3
IN 2
IN 1
IN 4
SMUX4
SMUX2
ADAT
AES3
88.2
48.0
44.1
32.0
192.0
96.0
176.4
MODE
SMUX2
1
AES3
2
AUDIO IN
S/PDIF
S/PDIF
AES11
WCLK
X-SRC
12
BI-DIR
UNI-DIR ADAT
1
SMUX4
1
SRC
REFERENCE
IN 3
IN 2
IN 1
IN 4
SMUX4
SMUX2
ADAT
AES3
88.2
48.0
44.1
32.0
192.0
96.0
176.4
MODE
SMUX2
1
AES3
2
AUDIO IN
S/PDIF
S/PDIF
AES11
WCLK
The S/PDIF interfaces do not have
any function in these bidirectional
conversion modes, due to the lack of
simultaneous useable inputs and outputs!
!
When the sampling rate of the
incoming AES3 signal is lower as
50.0kHz, both ADAT
TM
outputs trans-
mit the same signal and function as ADAT
TM
signal splitter.
Is the sampling rate of the incoming AES3 or
S/PDIF signal between 50.0kHz to 100.0kHz,
the ADAT
TM
output format will be automati-
cally switched over to ADAT
TM
/ SMUX2.
When the sampling rate of the incoming
AES3 or S/PDIF signal is between 100.0kHz
to 200.0kHz, the ADAT
TM
output format
will be automatically switched over to
ADAT
TM
/ SMUX4.
The corresponding SMUX format of the
ADAT
TM
outputs will be displayed in the
»STATUS« menu.
!