Mutec MC-3+ Smart Clock Manuel d'utilisateur télécharger pdf (Page 15)

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OPERATION

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Manual SDs-01 E 6.2.2003 18:18 Uhr Seite 13

Selecting Modes

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK MULTIPLIERS

This setting example shows the MC-3+ locked to its internal ultra-low-jitter

clock base generating output clocks of 44.1kHz at any available output. This

is the factory default setting.

There are three basic operation modes of your MC-3+ Smart Clock:

»INTERNAL«

The MC-3+ runs as a clock generator and is locked to its internal ul-

tra-low-jitter master clock. The basis clock rate for all outputs is selected in

the »REFERENCE« menu under »INTERNAL + 10.0M« (see next page).

»EXTERNAL«

The MC-3+ is locked to an externally applied reference signal, which can

be a Word Clock, a 10.0MHz reference from a so-called atomic clock or

GPS receiver and an AES3/11 or S/P-DIF digital audio signal, selected in the

»REFERENCE« menu.

»RE-CLOCK«

The MC-3+ allows to receive digital audio signals of the AES3 or S/P-DIF

format (selected in the »REFERENCE« menu) especially for re-clocking to

improve their acoustical quality.

With selection of the »RE-CLOCK« mode, the first available digital audio

input »S/P-DIF op« is selected under »REFERENCE« automatically as default.

Press the »MENU« key for once and you enter the »REFERENCE« menu.

Here press repeatedly the »SELECT« key to select the desired digital audio

input.

You have three re-clocking options per selected audio input which support

two different types of audio re-clocking:

Synchronous Re-Clocking of Digital Audio Signals

Selecting one of the three available digital audio inputs only, re-clocks the

incoming audio signal with a phase-synchroniszed, new generated ultra

low-jitter clock signal, embedded in the outgoing audio signal at the

incoming audio signal‘s sampling rate.

Asynchronous Re-Clocking of Digital Audio Signals

This is a very special function only available in the MC-3+ Smart Clock!

When selecting one of the digital audio inputs, you will notice that for each

input you have two additional options when pressing the »SELECT« key

furthermore:

Selected Audio Input + WCLK

Selected Audio Input + 10.0M

Selecting one of these re-clocking options enables you to re-clock your

digital audio signal with an additional clock reference of a different master

clock device. E.g., when selecting your desired audio input + »WCLK«, you

must feed in at the Word Clock input an addiitional Word Clock reference

signal with a clock rate between 32.0kHz and 192.0kHz. When selecting

your desired audio input + »10.0M«, the Word Clock input accepts a

10.0MHz reference signal from e.g. a so-called Atomic Clock or GPS receiver.

In both ways, the outgoing digital audio and Word Clock signals have got

the same basis clock rate like the incoming digital audio signal, but pha-

se-aligned (not phase-synchronized, of course!) to the additionally applied

external reference clock.

In the »CLOCK

IN» menu the clock rate of the incoming digital audio signal

is displayed and with help of the »CLOCK MULTIPLIERS« menu the Word Clock

output signals can be multiplied as described in the »Selecting Clock Multi-

pliers« section.

1 5432

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

Digital Audio Format

Conversion

When running the MC-3+ in the

»Re-CLOCK« mode and applying a digital

audio signal of the AES3 or S/P-DIF format

as reference, all digital audio outputs will

transmit the sourse signal. The signals at

the outputs which are not of same format

as the reference signal will be format

converted in realtime aligned to the

AES3 – 1992/2003 and IEC 60958 digital audio

format standards. Thus, your MC-3+ Smart

Clock works also as digital audio format

converter for you!

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Mutec MC-3+ Smart Clock Manuel d'utilisateur Page 15

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