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DRAWMER

D-Clock

DMS-2

WORD CLOCK MEASUREMENT

AND DISTRIBUTION AMPLIFIER

CONTENTS

Warranty

Safety Consideration

Radio Frequencies Statement

Chapter 1 - Introduction

Introduction

Features Overlay

Installation

Power Connection

Chapter 2 - Control Description

Simple Connection Guide

Audio Connections

Control Description

Typical Connection Setup

Connection Setup for Products with No Clock Output

Chapter 3 - DMS-2 General Information

If a fault develops

Contacting Drawmer

Specification

Block Diagram

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Summary of content (10 pages)

PAGE 1
DRAWMER D-Clock DMS-2 WORD CLOCK MEASUREMENT AND DISTRIBUTION AMPLIFIER CONTENTS Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Safety Consideration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Radio Frequencies Statement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Chapter 1 - Introduction Introduction . . . . . . . . . . . . . . .
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COPYRIGHT This manual is copyrighted 8 2004 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.
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DRAWMER D-Clock For the USA DMS-2 FEDERAL COMMUNICATIONS COMMISSION RADIO FREQUENCY INTERFERENCE STATEMENT WORD CLOCK MEASUREMENT AND DISTRIBUTION AMPLIFIER 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.
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CHAPTER 1 DRAWMER DMS-2 D-Clock WORD CLOCK MEASUREMENT AND DISTRIBUTION AMPLIFIER INTRODUCTION Digital audio facilities often require a number of clock sources, which are used to synchronise outboard processors to the system clock rate using external clock inputs. The Drawmer D-CLock is a dual input, twenty output word clock distributor with a 16 character blue LCD display providing a high accuracy reference measurement of the incoming sample rate.
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FEATURES OVERLAY 1 1 4x Front Panel Outputs: 4x BNC output connectors mounted on the front for ease of connectivity. 4 Input Source Select: Selects either the AES or BNC rear panel input source. 2 3 2 Display: Input is selected using 4 9 AES Termination Sensitivity: Switch to alter the AES termination sensitivity between 110 Ohms and Hi Z. This must be switched to Hi Z when using Loop Through. 5 3 Display Mode: Blue/White liquid crystal display with three switchable modes of operation.
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CHAPTER 2 SIMPLE CONNECTION GUIDE AUDIO CONNECTIONS AES11 Is via an XLR connector designed to be used with standard balanced microphone cable (20 metres maximum), wired pin 1 screen, pin 2 and 3 balanced data, and the XLR shell connected to the chassis. Having many short cables joined together is not advisable as each connector can cause undesirable signal reflections.
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CONTROL DESCRIPTION DISPLAY A Blue/White LCD display wth three switchable modes of operation: FREQ, ±PPM and ±%. The mode that is displayed during power down is saved for the next session. The display accuracy is 2ppm at all sample rates up to 768kHz, or 0.1Hz increments @ 48KHz sample rate MODE A switch controls the mode of display enabling you to read the incoming sample rate in your preferred manner. Pressing the switch toggles through the three modes of FREQ, ±PPM and ±%, with led indication.
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TYPICAL CONNECTION SETUP CONNECTION SETUP FOR PRODUCTS WITH NO CLOCK OUTPUT
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CHAPTER 3 D-Clock DMS-2 GENERAL INFORMATION SPECIFICATION IF A FAULT DEVELOPS For warranty service please call Drawmer Electronics Ltd. or their nearest authorised service facility, giving full details of the difficulty. 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.
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BLOCK DIAGRAM Ref:1v00 B 08-06-04 10