DRAWMER
M-Clock
DMS-1
MASTER CLOCK GENERATOR
AND MULTIPLE SAMPLE
RATE CONVERTER
CONTENTS
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Consideration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Radio Frequencies Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Chapter 1 - Introduction
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Installation and Connection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2 - Control Description
Multiple Sample Rate Converter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Master Clock Generator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Fig.1 THD +Noise Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 3 - General Information
If a fault develops . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Contacting Drawmer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Chapter 4 - DMS-1 Data
Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
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.
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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.
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.
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.
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.
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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.
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CHAPTER 1
DRAWMER DMS-1
M-Clock
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 sam- ple-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.
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: |
2 |
4x Status Locked Leds: |
3 |
4x Toslink Outputs: |
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either 1x S/PDIF or 1x optical TOSLINK |
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indicates a locked signal for each of the |
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conveniently located on the front panel |
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four inputs |
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for easy access. |
4 |
Output Sample Rate: |
5 |
Output 5/6 sample rate x2: |
6 |
Superclock (256x) Output: |
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the two switches set a sample rate of |
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doubles the sample rate as set by 4 - |
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provides Superclock to clock outputs 7 |
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44.1k, 48k, 88.2k and 96k. |
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upto 192k - for clock outputs 5 and 6. |
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and 8. |
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15 |
14 |
13 |
12 |
11 |
10 |
9 |
8 |
7 |
7 |
2x AES/EBU Inputs: |
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8 |
1x S/PDIF Input: |
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9 |
4x AES/EBU Outputs: |
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10 |
4x SPDIF Outputs: |
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11 |
2x AES 11 XLR Outputs: |
12 |
2x AES 11 SPDIF Outputs: |
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outputs to the AES 11 standard (Also called DARS, Blank Frame).
outputs to the AES 11 standard. (Also called DARS, Blank Frame).
13 8x BNC Clock Outputs: |
14 5/6 x2 Clock Outputs: |
15 7/8 Superclock (256x) Output: |
the sample rate of 44.1k, 48k, 88.2k and
96k is set by switches 4 .
when switch 5 is set to double the output is twice the sample rate as set by switches 4 , upto 192k.
when switch 6 is in, connectors 7/8 provide Superclock (256x) output.
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