MUTEC MC-3+ Smart Clock User Manual

Page 16

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A N H A N G

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Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 16

Selecting References

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK

MULTIPLIERS

REFERENCE

S/P-DIF op
S/P-DIF co

88.2

48.0

44.1

32.0

192.0

96.0

176.4

10.0M

WCLK

INTERNAL + 10.0M

AES3/11

Selection of references is mainly used when the MC-3+ is set under »MODE«
to »EXTERNAL« or »RE-CLOCK«

The above setting example shows the MC-3+ locked to an external Word
Clock signal. Its clock rate is then displayed in the »CLOCK

« menu on the

right hand side of the front panel. Within the »REFERENCE« menu you can
select the other available inputs by presssing the »SELECT« key repeatedly.
The example shows furthermore, that in the »CLOCK

MULTIPLIERS

« menu mul-

tiplication factors are set for the indivdual outputs as follows:

Word Clock output pair 1: Reference clock x 1
Word Clock output pair 2: Reference clock x 4
Word Clock output pair 3: Reference clock x 2
S/P-DIF output 4: Reference clock x 2
AES3/11 output 5: Reference clock x 1

When working in the »INTERNAL« mode, only the LED bar marked with
»INTERNAL + 10.0M« is available for selecting the basis clock rate of all out-
puts. There are seven different basis clocks adjustable by pressing the »SE-
LECT« key repeatedly. The LEDs display the selected clock rate as follows:

Audio to Blank Frame

Conversion

Running the MC-3+ in the

»EXTERNAL« mode and applying a digital
audio signal of the AES3 or S/P-DIF format
as reference causes a conversion of the
audio signal into a blank frame signal
available at the digital audio outputs. Only
when running the MC-3+ in the »RE-CLOCK«
mode, the audio outputs will transmit the
incoming audio signal in its original format,
but re-clocked, of course.

In both operation modes, the Word Clock
outputs transmit phase-aligned and de-
jittered clock signals.

32.0kHz

44.1kHz

48.0kHz

88.2kHz

96.0kHz

176.4kHz

192.0kHz

Supported Clock Rates for »INTERNAL + 10.0M«

Selecting 10.0M as Clock Reference

When stepping through the »REFERENCE« menu and selecting »10.0M«
as reference, simultaneously the first LED of the »INTERNAL + 10.0M« sub
menu starts lighting and you can select with the »SELECT« key one of the
seven clock rates provided by the internal ultra-low-jitter clock generator.
The outgoing clock signals are now of the selected clock rate, but pha-
se-aligned to the externally applied 10.0MHz reference signal. Also in that
mode, clock multipliers can be adjusted freely, as mentioned in the »Selec-
ting Clock Multipliers« section.

See further setting examples on next page.