Technical data

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88
Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 16
In this mode, the following clock references are available for synchronizati-
on of the internal SRCs:
ADAT
TM
, 32.0kHz –50.0kHz (predefined)
AES3 IN1– 4, every of the AES3 stereo inputs, 32.0kHz –192.0kHz
The ADAT
TM
input is predefined as clock source for the second SRC, that
means the ADAT
TM
output. As for the AES3 outputs, one of the four AES3
stereo inputs needs to be defined as clock source for the first SRC. There-
fore enter the »REFERENCE« menu and press the »SELECT« button repea-
tedly to select one of the AES3 inputs »IN1 – 4«.
The example on page 22 shows the AES3 input »IN1« selected as clock refe-
rence for the first SRC, that means the AES3 signal path.
When the external clock reference signals can be locked by the PLLs, the
blue LEDs »LOCK
1
« and »LOCK
2
« in the STATUS menu will light constantly.
The clock rate of the clock sources are displayed in the »REF CLOCK IN«
menu under »1« and »2«. The identifier »1« generally indicates the lock
status and clock rate of the ADAT
TM
clock reference. The identifier »2« indi-
cates the lock status and clock rate of the selected AES3 clock reference.
X-SRC Mode between
ADAT
TM
/ SMUX2 and AES3
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
This setting allows to receive an ADAT
TM
/ SMUX2 signal with clock rates bet-
ween 50.0kHz and 100.0kHz and an 8-channel AES3 signal between 32.0kHz
and 192.0kHz simultaneously. The format and sampling rate conversion
procedure is the same as described above. The clock reference for the ADAT
section is predefined with »SMUX2«. The above example shows the AES3
input »IN2« selected as clock reference for the first SRC, that means the
AES3 signal path.
X-SRC Mode between
ADAT
TM
/ SMUX4 and AES3
Using the X-SRC mode, the MC-4
extracts the needed clock rates
out of the incoming digital audio
signals. Thereby, the system does not need
and does not accept any additional external
applied clock reference signals.
!
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
This setting allows to receive an ADAT
TM
/ SMUX2 signal with clock rates bet-
ween 100.0kHz and 200.0kHz and an 8-channel AES3 signal between 32.0kHz
and 192.0kHz simultaneously. The format and sampling rate conversion
procedure is the same as described above. The clock reference for the ADAT
section is predefined with »SMUX4«. The above example shows the AES3
input »IN4« selected as clock reference for the first SRC, that means the
AES3 signal path.
23