Mutec MC-3+ Smart Clock Manuel d'utilisateur télécharger pdf (Page 17)

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

Selecting Clock Multipliers

Pressing the »MENU« key changes from the »REFERENCE» to the »CLOCK

MULTIPLIERS« menu. Here you can select for every pair of Word Clock and the

digital audio outputs individual clock rate multiplication factors of x1, x2,

x4 and x256 by pressing the »SELECT« key repeatedly. The multiplication

factors refer always to the basis clock rate of the incoming reference signal

or the clock rate selected of the internal ultra-low-jitter clock generator

(»INTERNAL + 10.0M«). Thus, dependently of the incoming or selected basis

clock rate, the MC-3+ covers a range auf audio related clock rates from

32.0kHz up to 768.0kHz plus the two so-called Super Clocks (see below).

The setting »x 256«, or so-called Super Clock, is only available for the three

pairs of Word Clock outputs. It transmits either a clock rate of 11,289.6MHz

(44.1kHz x 256) or 12,288.0MHz (48.0kHz x 256). The system analysis in any

way the basis clock rate of the incoming or the generated reference clock

signal, 44.1kHz or 48.0kHz, and outputs the corresponding Word Clock

x 256 for use with older digidesign ProTools

systems.

The multiplication of the digital audio outputs S/P-DIF (»4«) and AES3/11

(»5«) is limited to a maximum clock rate of 192.0kHz, regardless of the clock

rate of the reference signal.

Multiplying Digital Audio

Signals

When having a digital audio input

selected as reference and setting the mul-

tiplication factor to higher than »x 1«, the

MC-3+ outputs a blank frame signal only at

the audio outputs. A sampling rate conver-

sion of the incoming digital audio signal is

not carried out.

An AES3 signal is asynchronous re-clocked with an additional Word Clock signal. All outputs provide

their signals with same clock rate like this one of the incoming AES3 digital audio signal, except the

Word Clock output 3 is set to output the double clock rate of the reference signal.

A 10.0MHz clock signal is applied as reference and the basis clock of all outputs is set to 48.0kHz.

The outputs provide different multiples of the basis clock rate due to the adjustments of the clock

multipliers. All four red LEDs in the »CLOCK

IN« area light to show that a 10.0MHz reference comes in.

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK MULTIPLIERS

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

Further Setting Examples

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK MULTIPLIERS

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

An optical S/P-DIF digitalaudio signal is synchronous re-clocked. All outputs provide their signals on

the same clock rate like this one of the incoming optical S/P-DIF digital audio signal.

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK MULTIPLIERS

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

A coaxial S/P-DIF digital audio signal is applied as reference. All outputs provide their clock rates

aligned to the selected multiplication factors. The S/P-DIF (»4«) and AES3/11 (»5«) outputs supply

blank frame signals.

MODE

RE-CLOCK

EXTERNAL

INTERNAL

x 256

x 4

x 2

x 1

CLOCK MULTIPLIERS

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

1 2 ... 12 13 14 15 16 17 18 19 20 21 22

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Mutec MC-3+ Smart Clock Manuel d'utilisateur Page 17

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