TerraTec Sync Xtension EWS ClockWork Manuel utilisateur

SyncXtension EWS ClockWork (English) 1

Quick reference (English)

Version 1.0, Status 01.09.00

2 SyncXtension EWS ClockWork (English)

CE declaration

We:

TerraTec Electronic GmbH, Herrenpfad 38, D-41334 Nettetal, Germany

hereby declare that the product:

Sync Xtension EWS ClockWork

to which this declaration refers complies with the following standards or standardizing documents:

1. EN 55022

2. EN 50082-1

The following are the stipulated operating and environmental conditions for the said compliance:

Residential, business and commercial environments and small-company environments.

This declaration is based on:

test report (s) of the EMC testing laboratory

TerraTec®ProMedia, SoundSystem Gold, SoundSystem Maestro, SoundSystem Base1, SoundSystem

DMX, AudioSystem EWS®64, AudioSystem EWS88, XLerate, XLerate Pro, Base2PCI, TerraTec 128iPCI,

TerraTV+, TerraTV Radio+, TerraTValue, WaveSystem, TerraCAM USB, MIDI Smart and MIDI Master Pro

are trademarks registered by TerraTec®Electronic GmbH Nettetal.

In most cases, the designations used in this manual for software and hardware are also registered

trademarks and are thus subject to the relevant regulations.

Meticulous care has been taken in the preparation of all text passages and illustrations in this manual.

TerraTec Electronic GmbH and its authors, however, accept no liability, legal or otherwise, for errors or

the consequences of such errors. We reserve the right to technical modifications.

may be reproduced in any form whatsoever, by photography, microfilming or other process or rendered

into a language/form usable by computers without the prior written consent of the authors. All rights for

use and propagation by presentation, radio and television are also reserved.

SyncXtension EWS ClockWork (English) 3

Preface

Great, that you have expanded your TerraTec AudioSystem with the capacity to process Word-

Clock and SuperClock Signals. The EWS ClockWork not only allows you to externally synchro-

nise an EWS with EWS®-Connect connection, it can also function as the central clock for your

entire digital studio. Moreover, the EWS ClockWork can be adjusted to a wide variety of de-

mands. How to adjust the special settings of this module and how all other components are to

be connected will become clear from the following chapters.

Scope of delivery

The kit is comprised of

•the EWS ClockWork Module

•5-pole connection cable  5-pole

•3-pole connection cable  3-pole

•Registration documents

•Service information

4 SyncXtension EWS ClockWork (English)

The Design of the EWS ClockWork

dWordClock / SuperClock IN

eWordClock / SuperClock OUT

fLED, Input Status - WordClock

gLED, Input Status - SuperClock

hDIP switches

iJumper 3 (J3), connection for EWS88 Master Sync IN

jJumper 4 (J4), connection for EWS88 Slave 1 Sync IN

kJumper 5 (J5), connection for EWS88 Slave 2 Sync IN

lJumper 6 (J6), connection for EWS88 Slave 3 Sync IN

mJumper 7 (J7), connection for EWS88 Master Sync OUT

nLED, EWS ClockWork operation mode

SyncXtension EWS ClockWork (English) 5

WordClock or SuperClock?

The serial transfer of digital audio data was already standardised by the AES (Audio Engineer-

ing Society) in the mid-eighties and dictates as such a 64 bit basic word width per stereo sam-

ple. Irrespective of the original word width (e.g. 16 bit) 32 bit is to be transferred for each mono

sample. A WordClock Generator produces per stereo sample, a cycle whose frequency corre-

sponds exactly with the actual sample frequency. A SuperClock Generator transmits the signal

in a 256 times higher clock frequency (256 FS). The question of which clock is the most suited

one has been under frantic discussion for some time now, but one must keep in mind that a

SuperClock can be a maximum of over 24MHz (256 x 96KHz) and may distort other equipment

in the studio. In addition, modern digital equipment also features high-quality error correction

components by means of which any disadvantage of a slower WordClock can be compensated.

The connections can be made by means of ordinary coaxial 75 Ohm antenna cable, or alterna-

tively you can buy ready-made standard cables in the specialised music stores. In particular

for use in the "gig scene" you are advised to use highly flexible and technically robust cables.

6 SyncXtension EWS ClockWork (English)

Versatile range of applications

If you wish to synchronise your digital studio by means of a central clock, you must first desig-

nate one device as master. This may be any EWS card in the PC fitted with an EWS®-Connect

connection, but also an external digital device such as e.g. a digital mix pannel.

You may decide which one will be given the master, but there are some things that should be

taken into account:

Should the audio files when played by means of a software application, e.g. a sequencer pro-

gram (Emagic Logic, Steinberg Cubase VST, etc.), often have various sample rates then the

EWS-Master Card in the PC should be designated as Clock-Master. Your entire digital system

(including all external equipment) will be set to the appropriate frequency each time you

switch to play mode. Some devices may, however, cause problems and will consequently ref-

use audio processing if there is no external clock connected, e.g. when the PC with the Master-

EWS has not been switched on. In this case the external device is to be designated master and

the sample rate is to be set.

A further feature of the EWS ClockWork is the possibility to include external devices which

have no BNC connections for a Word / SuperClock Signal in the synchronisation.

Should a DAT recording for instance be transferred to the PC where the DAT recorder does not

have a Word or SuperClock connection, the S/PDIF source may be designated master. If the

EWS-Master Card is an EWS88 D then this also holds for the ADAT™ signal.

SyncXtension EWS ClockWork (English) 7

Dip switch settings

Master: WordClock-/Super Clock- IN

EWS88 ControlPanel Setting

EWS ClockWork is included in the external chain

Master: WordClock-/SuperClock- IN

Switch

OFF

External W.-/S.-Clock

Internal

SuperClock

WordClock

Format Source S/PDIF

S/PDIF

Termination Off

Te rmi n a t i o n O n

Te r m .

Mast er: EW S m as te r car d

Master: S/PDIF Interface on EWS master card

EWS ClockWork is last Devic ein the external chain

OFF

(X)

Su p e rC l oc k

OFF

XXX

don't care

OFF

(X)

don't care

OFF

don't care

OFF

8 SyncXtension EWS ClockWork (English)

1. Master: EWS Master Card

The concept "EWS Master Card" does not prescribe the card as the Clock-Master of the entire

internal and external Systems. Only when the Master-Clock is to be generated via an EWS-

System, will the EWS-Master card also be the Clock-Master. All other EWS cards with EWS®-

Connect connection are basically operated in slave mode. An exception is the "Independent"

mode option on the ControlPanel of the EWS-Systems (for further information please refer to

the manual of the EWS card).

Should you operate an external device in this operation mode via the S/PDIF Interface of the

EWS-Master card, please remember that this device can only be synchronised in record mode.

In play back mode, an S/PDIF device without Word / SuperClock connection only functions

according to its own internal clock generator. Even if the sample rate of the S/PDIF device cor-

responds with that of the Clock-Master the sources will nevertheless run unsynchronised

which will result in distortions during play back. In such case it is adviced to choose the mode

"Master: External S/PDIF (ADAT™) IN" described on the following pages.

SyncXtension EWS ClockWork (English) 9

Master: EWS Master Card

DA TDA T

E-Kai

EWS88 MT

EW S 88 D

Digital Mixer Sa mpl er

DAT-Recorder

(M as t er )

(Slave 1)

CN1 Sync-INLink*

CN1 Syn c -IN L i nk

J3 to Ma ster Syn c I n

to S l a ve 3 Sy nc I n

to Slave2Sync In

CN2 Sync-OUTLinkJ7 to Master S ync -OUT

Digital I/O

INOUT

J4 -J6 to Sl ave 1-3 Sync -I N

EWSClockWork

Clo ck So ur ce

MASTER

S/PDIFLink

* Please note: The Hardware-Revision 1.0 of the EWS88 D contains a deviant labelling of the

pin strip. Here, the 5-pole Sync IN has been labelled CN2 and the 3-pole Sync OUT CN1. As of

Hardware-Revision 1.1 of the EWS88 D the labelling of the EWS®-Connect connections to the

EWS88 MT has been made correspondent.

10 SyncXtension EWS ClockWork (English)

2. Master: WordClock (SuperClock) IN

If the Clock IN bus receives a good signal, both blue LEDs in the slot plate will indicate this

(each for WordClock or SuperClock). If the EWS ClockWork Modul is last in a Word or Super-

Clock chain the termination will have to be activated by means of DIP switch 4. Switch 1

(WordClock / SuperClock switch) is idle in this mode since the module adjusts to the external

Clock format present.

Should you operate an external device in this operation mode via the S/PDIF Interface of the

EWS-Master card, please remember that this device can only be synchronised in record mode

In play back mode, an S/PDIF device without Word-/SuperClock connection only functions

according to its own internal clock generator. Even if the sample rate of the S/PDIF device cor-

responds with that of the Clock-Master the sources will nevertheless run unsynchronised and

this will result in distortions during play back. In such case it is advised to choose the mode

"Master: External S/PDIF (ADAT™) IN" described on the following pages.

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