Drawmer M-Clock Lite DMS-4 User manual

DRAWMER
M-Clock Lite
DMS-4
AES GRADE 1 MASTER CLOCK
CONTENTS
Warranty
SafetyConsideration
RadioFrequenciesStatement
Chapter 1 - Introduction
Introduction
Installation
Audio Connections & Guide
Chapter 2 - General Information
Ifafaultdevelops
ContactingDrawmer
Specification
Block Diagram
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Drawmer Electronics Ltd., warrants the Drawmer DMS-4
M-Clock Lite, AES Grade 1 Master Clock to conform
substantiallytothespecificationsofthismanualforaperiod
of one year from the original date of purchase when used
in accordance with the specifications detailed in this
manual. In the case of a valid warranty claim, your sole
andexclusive remedyand Drawmer’sentire liabilityunder
any theory of liability will be to, at Drawmer’s discretion,
repair or replace the product without charge, or, if not
possible,torefundthe purchasepricetoyou. This warranty
isnot transferable.It appliesonly tothe originalpurchaser
ofthe product.
Forwarrantyserviceplease callyourlocalDrawmer dealer.
AlternativelycallDrawmer ElectronicsLtd. at +44(0)1709
527574.Thenshipthedefectiveproduct,withtransportation
and insurance charges pre-paid, to Drawmer Electronics
Ltd.,Coleman Street,Parkgate, Rotherham,S62 6ELUK.
WritetheRAnumberinlarge letters inaprominentposition
on the shipping box. Enclose your name, address,
telephonenumber, copyof the originalsales invoice and a
detaileddescriptionoftheproblem.Drawmerwillnotaccept
responsibility for loss or damage during transit.
This warranty is void if the product has been damaged by
misuse,modification or unauthorised repair.
THIS WARRANTY IS IN LIEU OF ALL WARRANTIES,
WHETHERORALORWRITTEN,EXPRESSED,IMPLIED
OR STATUTORY. DRAWMER MAKES NO OTHER
WARRANTY EITHER EXPRESS OR IMPLIED,
INCLUDING, WITHOUT LIMITATION, ANY IMPLIED
WARRANTIES OF MERCHANTABILITY, FITNESS FOR
A PARTICULAR PURPOSE, OR NON-INFRINGEMENT.
PURCHASER’S SOLE AND EXCLUSIVE REMEDY
UNDER THIS WARRANTY SHALL BE REPAIR OR
REPLACEMENTAS SPECIFIED HEREIN.
INNOEVENTWILLDRAWMERELECTRONICSLTD.BE
LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING FROM ANY DEFECT IN THE PRODUCT,
INCLUDINGLOSTPROFITS,DAMAGE TO PROPERTY,
AND,TOTHE EXTENTPERMITTEDBY LAW, DAMAGE
FOR PERSONAL INJURY, EVEN IF DRAWMER HAS
BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES.
Some states and specific countries do not allow the
exclusion of implied warranties or limitations on how long
animplied warranty maylast, sothe abovelimitationsmay
not apply to you. This warranty gives you specific legal
rights.You may have additional rights that vary from state
to state, and country to country.
In the interests of product development, Drawmer reserve the right to modify or
improve specifications of this product at any time, without prior notice.
ONE YEAR LIMITED WARRANTY
COPYRIGHT
This manual is copyrighted © 2008 by Drawmer Electronics Ltd. With all rights reserved. Under copyright
laws, no part of this publication may be reproduced, transmitted, stored in a retrieval system or translated
into any language in any form by any means, mechanical, optical, electronic, recording, or otherwise, with-
out the written permission of Drawmer Electronics Ltd.

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For the USA
FEDERALCOMMUNICATIONS COMMISSION RADIO
FREQUENCYINTERFERENCESTATEMENT
Thisequipment hasbeen testedand foundto complywith
the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonableprotectionagainstharmfulinterferenceinaresi-
dential installation. This equipment generates, uses and
canradiateradio frequency energyand,if notinstalledand
usedinaccordancewiththe instructions,maycauseharm-
ful interference to radio communications. However, there
isno guaranteethat interference will not occurin aparticu-
lar installation. If this equipment does cause interference
to radio or television reception, which can be determined
by turning the equipment off an on, then the user is en-
couraged to try to correct the interference by one or more
ofthe following measures:
Re-orientor relocatethe receiving antenna.
Increasetheseparationbetweentheequipment and
thereceiver.
Connect the equipment into an outlet on a circuit
differentfromthattowhichthereceiverisconnected.
Consultthe dealer oran experienced radio/TV
technicianfor help.
Unauthorised changes or modification to this system can
void the users’ authority to operate this equipment.
Thisequipment requiresshielded interfacecables inorder
to meet FCC class B limit.
ForCanada
CLASS B NOTICE
This digital apparatus does not exceed the Class B limits
forradio noise emissions set outin the Radio Interference
Regulationsof the CanadianDepartment of Communica-
tions.
CLASSE B AVIS
Cet appareil numérique ne dépasse pas les limites de la
classeBauniveaudesémissionsdebruitsradioélectriques
fixés dans le Règlement des signaux parasites par le
ministèreCanadien des Communications.
DRAWMER
M-Clock Lite
DMS-4
AES GRADE 1
MASTER CLOCK
SAFETY CONSIDERATIONS
CAUTION-MAINSFUSE
TO REDUCE THE RISK OF FIRE
REPLACETHEMAINS FUSE ONLY WITH
A FUSE THAT CONFORMS TO IEC127-2.
250 VOLT WORKING,TIMEDELAYTYPE
AND BODY SIZE OF 20mm x 5mm.
THEMAINSINPUTFUSE MUST
BE RATED AT T315mA.
CAUTION-MAINSCABLE
DO NOT ATTEMPT TO CHANGE
OR TAMPER WITH THE
SUPPLIEDMAINSCABLE.
CAUTION-SERVICING
DONOT PERFORM ANYSERVICING.
REFERALLSERVICING TOQUALIFIED
SERVICE PERSONNEL.
WARNING
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THISEQUIPMENT TORAIN ORMOISTURE.

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DRAWMER DMS-4
M-Clock Lite
AES GRADE 1 MASTER CLOCK
WordclockOutputs:
Two wordclock outputs conveniently
located on the front panel.
1 3
5 4
1OutputSample Rate:
Two buttons toggle through the wordclock output sample rates, setting the rate for
the eight rear panel outputs 5 and the two front panel outputs 1from 44.1kHz to
384kHz. An EXTernal wordclock input can also be selected that sets the clock output
rate to match that of the incoming external clock 4 .
3
WordclockInputs:
Sets the output sample rate when the Output Sample Rate
control 3 is set to EXT.
4WordclockOutputs:
In addition to the two front panel wordclock outputs eight more
are found on the rear.
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CHAPTER 1
2
INTRODUCTION
Itis nowwidely accepted thatone ofthe essential requirements for highquality
digital recording is a first class, high stability master clock generator. These
canbe complicated deviceswith many addedfeatures, which although useful,
maybe surplusto requirements.The aimof M-ClockLite is to provide a simple,
highqualityclock generator, whichisforward compatiblewithhigh speed clocks
predicted for the future. M-Clock Lite features an AES Grade 1 master clock
generator,meaningthatthegeneratedclockhasa long term frequencyaccuracy
of +/- 1ppm.
Features:
M-Clock Lite offers clock rates of 44.1, 48, 88.2, 96, 176.4, 192, 352.8 and
384kHz at extremely low jitter.
An external clock input allows the user to select an alternative clock source
without having to re-route clock cables.
10Outputs areprovided, 8at therear and2 foreasy accesson thefront panel.
OnLed:
A power LED notifies that the unit is on.
2

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TheDMS-4 is designed for standard19" rack mounting and occupies1U of rack space. Avoidmounting the unit directly
abovepower amplifiersor power suppliesthat radiatesignificant amounts ofheat.
If the unit is to be used in a mobile situation, it is strongly recommended that the rear of the unit is supported in the
carryingrack toavoid bendingthe front panel rack mounting‘ears’.
Use fibre or plastic washers to prevent the front panel becoming marked by the mounting bolts.
The unit will be supplied with a power cable suitable for domestic power outlets in your country. For your own safety it
is important that you use this cable. The unit should always be connected to the mains supply earth using this cable.
Poweredby a universalswitch mode powersupply, the DMS-4 M-ClockLite operates frommains voltages between 85
to250v, eliminating the need to makeany changes whentouring and allowingthe unit toremain fully operationalduring
large fluctuations in the mains power supply.
TheDMS-4 is fittedwith a mainsfuse that conformsto the IEC127-2
standardandisrated atT315mA.Ifthe fuse blowsitmust be replaced
withone ofidentical typeand value.To doso removethe mainscable
from the IEC connector and open the drawer that is located just
below, replace the fuse, close the drawer and re-attach the mains
cable.
INSTALLATION
AUDIO CONNECTIONS
Word Clock
Use only good quality 75Ωdigital or video coax (not aerial downlead) cable for the word-clock signals, terminated with
thecorrecttype of 75ΩBNCconnectors-inferiorcableswillintroducejitterandwill completely underminetheperformance
benefits which might be achieved by using a master clock in the first place!
SIMPLE WORDCLOCK DISTRIBUTION SETUP
Fuse

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SPECIFICATION
Internal Clock Generator
2 x Temperature Compensated Xtal Oscillators (TCXOs)
AES11 GRADE 1 Stability, +/-1ppm (0-60 Celcius),
Tolerance <<+/-1ppm (15-30
Celcius)
Phase noise -130 dBc/Hz @ 1kHz
@ 24.5760 MHz to give Fs 48 kHz, 96 kHz,
192kHz & 384 kHz
@ 22.5792 MHz to give Fs 44.1 kHz, 88.2 kHz,
176.4 kHz & 352.8 kHz
Word Clock Inputs
1 x BNC (Rear Panel)
Input Impedance 75 Ohms
Word Clock Outputs
8 x BNC (Rear Panel)
2 x BNC (Front Panel)
Output impedance 33 ohms
All outputs selectable between 44.1, 48, 88.2, 96, 176.4,
192, 352.8 and 384kHz
General
Power Supply: Internal, Universal Input, 15 W
Fuse Rating T315mA for All voltages.
CONFORMING TO: IEC127-2
Fuse Type 20mm x 5mm, Class 3 Slow - Blow
250Volt working
Dimensions: 1u, 19" Rack Mount,
482mm(W) x 44mm(H) x 145mm(D)
Weight 1.755 kg
For warranty service please call Drawmer Electronics Ltd. or
their nearest authorised service facility, giving full details of
thedifficulty.
A list of all main dealers can be found on the Drawmer
webpages.
On receipt of this information, service or shipping instructions
will be forwarded to you.
No equipment should be returned under the warranty without
prior consent from Drawmer or their authorised representative.
For service claims under the warranty agreement a service
Returns Authorisation (RA) number will be issued.
Write this RA number in large letters in a prominent position
on the shipping box. Enclose your name, address, telephone
number, copy of the original sales invoice and a detailed
description of the problem.
Authorised returns should be prepaid and must be insured.
All Drawmer products are packaged in specially designed
containersforprotection.Iftheunitis to be returned,theoriginal
container must be used. If this container is not available, then
the equipment should be packaged in substantial shock-proof
material, capable of withstanding the handling for the transit.
CONTACTING DRAWMER
Drawmer Electronics Ltd., will be pleased to answer all
application questions to enhance your usage of this
equipment. Please address correspondence to:
Drawmer (Technical Help line)
Coleman Street
Parkgate
Rotherham
S62 6EL
UK
Alternatively contact us by E-mail on :
[email protected]
Furtherinformationonall Drawmer dealers, Authorised service
departments and other contact information can be obtained
from our web pages on:
http://www.drawmer.com
M-CLOCK Lite DMS-4 GENERAL INFORMATION
CHAPTER 2
IF A FAULT DEVELOPS

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BLOCK DIAGRAM
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