Drawmer DMS-1 User Manual
DRAWMER
M-Clock
DMS-1
MASTER CLOCK GENERATOR
AND MULTIPLE SAMPLE
RATE CONVERTER
CONTENTS
Warranty
Safety Consideration
Radio Frequencies Statement
Chapter 1 - Introduction
Introduction
Installation
Installation and Connection Guide
Chapter 2 - Control Description
Multiple Sample Rate Converter
Master Clock Generator
Fig.1 THD +Noise Diagram
Chapter 3 - General Information
If a fault develops
Contacting Drawmer
Chapter 4 - DMS-1 Data
Specification
Block Diagram
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COPYRIGHT
This manual is copyrighted
8 2002 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, without the written permission of Drawmer Electronics Ltd.
ONE YEAR LIMITED WARRANTY
Drawmer Electronics Ltd., warrants the Drawmer DMS-1
M-Clock master clock generator and sample rate converter
to conform substantially to the specifications of this manual
for a period 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 and exclusive remedy and Drawmer’s entire liability
under any theory of liability will be to, at Drawmer’s
discretion, repair or replace the product without charge, or,
if not possible, to refund the purchase price to you. This
warranty is not transferable. It applies only to the original
purchaser of the product.
For warranty service please call your local Drawmer dealer.
Alternatively call Drawmer Electronics Ltd. at +44 (0)1709
527574. Then ship the defective product, with transportation
and insurance charges pre-paid, to Drawmer Electronics
Ltd., Coleman Street, Parkgate, Rotherham, S62 6EL UK.
Write the 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. Drawmer will not accept
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,
WHETHER ORAL OR WRITTEN, 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
REPLACEMENT AS SPECIFIED HEREIN.
IN NO EVENT WILL DRAWMER ELECTRONICS LTD. BE
LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES
RESULTING FROM ANY DEFECT IN THE PRODUCT,
INCLUDING LOST PROFITS, DAMAGE TO PROPERTY,
AND, TO THE EXTENT PERMITTED BY 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
an implied warranty may last, so the above limitations may
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.
2
DRAWMER
M-Clock
DMS-1
MASTER CLOCK GENERATOR
AND MULTIPLE SAMPLE
RATE CONVERTER
SAFETY CONSIDERATIONS
CAUTION - MAINS FUSE
TO REDUCE THE RISK OF FIRE
REPLACE THE MAINS FUSE ONLY WITH
A FUSE THAT CONFORMS TO IEC127-2.
250 VOLT WORKING, TIME DELAY TYPE
AND BODY SIZE OF 20mm x 5mm.
THE MAINS INPUT FUSE MUST
BE RATED AT T315mA.
For the USA
FEDERAL COMMUNICATIONS COMMISSION RADIO
FREQUENCY INTERFERENCE STATEMENT
This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment generates, uses and
can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio communications. However, there
is no guarantee that interference will not occur in a particular 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 encouraged to try to correct the interference by one or more
of the following measures:
Re-orient or relocate the receiving antenna.
Increase the separation between the equipment and
the receiver.
CAUTION - MAINS CABLE
DO NOT ATTEMPT TO CHANGE
OR TAMPER WITH THE
SUPPLIED MAINS CABLE.
CAUTION - SERVICING
DO NOT PERFORM ANY SERVICING.
REFER ALL SERVICING TO QUALIFIED
SERVICE PERSONNEL.
WARNING
TO REDUCE THE RISK OF FIRE OR
ELECTRIC SHOCK DO NOT EXPOSE
THIS EQUIPMENT TO RAIN OR MOISTURE.
Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV
technician for help.
Unauthorised changes or modification to this system can
void the users’ authority to operate this equipment.
This equipment requires shielded interface cables in order
to meet FCC class B limit.
For Canada
CLASS B NOTICE
This digital apparatus does not exceed the Class B limits
for radio noise emissions set out in the Radio Interference
Regulations of the Canadian Department of Communications.
CLASSE B AVIS
Cet appareil numérique ne dépasse pas les limites de la
classe B au niveau des émissions de bruits radioélectriques
fixés dans le Règlement des signaux parasites par le
ministère Canadien des Communications.
3
CHAPTER 1
DRAWMER DMS-1
M-ClocM-Cloc
M-Cloc
M-ClocM-Cloc
MASTER CLOCK GENERATOR AND
MULTIPLE SAMPLE RATE CONVERTER
INTRODUCTION
In today's studio where increasing numbers of digital devices need
to be interconnected, maintaining digital signal integrity can be a
serious problem. The traditional professional solution has been to
use an expensive master clock that drives all the digital equipment
in the studio, but in most project studios there are often pieces of
equipment that don't have wordclock inputs such as consumer CD
players, MD recorders, DAT machines and budget computer
soundcards.
The Drawmer M-Clock DMS-1 has been designed to be the heart of syncronisation in the digital audio studio, offering an
extremely highly specified, multiple output master clock generator that also incorporates four further channels of sample-rate-conversion (a total output of twenty four Grade 1 synchronization signals in the form of AES/EBU, SPDIF,
optical Toslink and AES 11), all locked to the same master clock. The M-Clock generates seven Ultra Low Jitter sample
rates - 44.1k, 48k, 88.2k, 96k, 176.4k and 192k as well as 256x Superclock, all stable to < 1ppm. If any equipment in
the studio suffers jitter at its output the sample rate converters may be used to de-jitter and re-clock the signals before
further transmission.
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The advantages of combining wordclock with multiple channels of 'clock-locked' sample rate conversion are significant
and often under-appreciated. With M-Clock, all your 'pro' and consumer digital equipment can run in the same system,
locked to the same clock, with no worries about finding a suitable sync source. You'll no longer have to switch equipment
between internal and external sync as you repatch - and the M-Clock helps to maintain optimum stereo imaging, lower
noise and lower distortion. If you have multiple pieces of digital equipment in your studio, whether professional or a
mixture of professional and consumer, the Drawmer M-Clock is the most effective upgrade you can make.
1 2 3 4 5 6
1
Front Panel Input:
either 1x S/PDIF or 1x optical TOSLINK
4
Output Sample Rate:
the two switches set a sample rate of
44.1k, 48k, 88.2k and 96k.
2
4x Status Locked Leds:
indicates a locked signal for each of the
four inputs
5
Output 5/6 sample rate x2:
doubles the sample rate as set by 4 upto 192k - for clock outputs 5 and 6.
3
4x Toslink Outputs:
conveniently located on the front panel
for easy access.
6
Superclock (256x) Output:
provides Superclock to clock outputs 7
and 8.
15
7
2x AES/EBU Inputs:
10
4x SPDIF Outputs:
13
8x BNC Clock Outputs:
the sample rate of 44.1k, 48k, 88.2k and
96k is set by switches 4 .
4
13 11 1012 9 8 714
8
1x S/PDIF Input:
11
2x AES 11 XLR Outputs:
outputs to the AES 11 standard
(Also called DARS, Blank Frame).
14
5/6 x2 Clock Outputs:
when switch 5 is set to double the
output is twice the sample rate as set by
switches 4 , upto 192k.
9
4x AES/EBU Outputs:
12
2x AES 11 SPDIF Outputs:
outputs to the AES 11 standard.
(Also called DARS, Blank Frame).
15
7/8 Superclock (256x) Output:
when switch 6 is in, connectors 7/8
provide Superclock (256x) output.
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