Drawmer D-Clock-R DMS-6 Owner's Manual

DRAWMER

D-Clock-R

DMS-6

DUAL REDUNDANT

WORD CLOCK

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

Chapter 3 - DMS-6 General Information

If a fault develops
Contacting Drawmer
Specification
Block Diagram

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2

Drawmer Electronics Ltd., warrants the Drawmer DMS-6

D-Clock-R Dual Redundant Word-Clock Distribution

Amplifier 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 you can call Drawmer Electronics Ltd. directly

at [phone]. 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.

ONE YEAR LIMITED WARRANTY

COPYRIGHT

This manual is copyrighted

8 2012 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.

3

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 and 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.

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.

DRAWMER

D-Clock-R

DMS-6

DUAL REDUNDANT WORD CLOCK

DISTRIBUTION AMPLIFIER

SAFETY CONSIDERATIONS

CAUTION - MAINS FUSE

TO REDUCE THE RISK OF FIRE

REPLACE THE MAINS FUSES 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 T500mA.

CAUTION - MAINS CABLES

DO NOT ATTEMPT TO CHANGE

OR TAMPER WITH THE

SUPPLIED MAINS CABLES.

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.

4

DRAWMER

D-ClocD-Cloc

D-ClocD-Cloc

D-Cloc

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-R-R

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DMS-6

DUAL REDUNDANT WORD CLOCK DISTRIBUTION AMPLIFIER

Expanding on the renowned Drawmer D-Clock in providing

word clock measurement and distribution to digital audio
environments the D-Clock-R has been designed with not
only studio recording in mind but also the live and broadcast
environment, where reliability and stability are absolutely
imperative. Designed for fail-safe operation the D-Clock-R
as been developed with dual redundancy for both the
power supplies and also the word clock inputs, ensuring
that the show will go on regardless of technical difficulties.

The Drawmer D-CLock-R is an auto-sensing dual
redundancy input, sixteen output word clock distributor
with a 16 character blue LCD display providing a high
accuracy reference measurement of the incoming sample
rate. It uses a high stability TCXO (temperature
compensated xtal oscillator) along with a microcontroller
to measure the incoming sample rate to an accuracy of
2ppm and displays the information in three different
formats, actual frequency (to one decimal place), nominal
frequency +/- ppm error, or nominal frequency plus
percentage of pull up or pull down.

The D-Clock-R has two BNC inputs, a default
and auxiliary, which is automatically selected
depending on the strength and quality of the
signal, and capable of locking on to both
word clock (upto 768KHz) and AES-3id (upto
192kHz), it has twelve BNC clock outputs
situated on the rear panel with a further four
BNC clock outputs on the front panel for
quick patching to other digital devices.

CHAPTER 1

INTRODUCTION

Dual Redundancy power supply via 2 x
Universal voltage filtered mains power
inlets for continuous operation & reliability.

Dual Redundant input / 16 output Clock
Measurement and Distribution Amplifier

Inputs: 2 x Auto-Sensing WordClock /
AES3id BNC dual redundant inputs (@75
Ohms impedance) - should one fail input
is automatically switched to the alternative
source.

Outputs: 16 BNC clock outputs - 33 Ohms
impedance - 4 on the front panel for
convenience.

3 sample rate measurement LCD modes
accurate to 2ppm.

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DUAL REDUNDANT INPUTS

Auto-Sensing, auto-switching

inputs provides a fail-safe backup

should one input fail.

TWO INDEPENDENT POWER SUPPLIES

PROVIDE DUAL REDUNDANCY

Can fully operate on a single supply or both (with power load

balancing), providing a fail-safe backup should one fail.

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7

6

4x Front Panel Outputs:
4x BNC output connectors mounted
on the front for ease of connectivity.

1 2 3 4 5

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1

Display:
Blue/White liquid crystal display
with three switchable modes of
operation.

2

Display Mode:

Switch to control the mode of
display 2 between Frequency,
PPM and %.

3

Clock Present LED’s:

Show the presence of Word Clock
and AES3id for both SYNC1 and
SYNC2 inputs 7

4

Active Input LED’s:

Two led’s showing which of the two
word clock inputs 7 has been
automatically selected.

5

2x Auto Sensing Word-Clock/
AES3id Inputs:

2 Dual Redundant BNC Word Clock
/ AES3id inputs can be connected
simultaneously to provide a clock
and also a backup, should one fail.
The input selection is carried out
automatically by the DMS-6, with
SYNC 1 being default and SYNC 2
auxiliary.

7

12x BNC Clock Outputs:

Buffered BNC wordclock outputs with
33 Ohms impedance.

8

Dual Redundant PSU Inputs:

2 x identical power supplies can be
used either simultaneously or
independently, should power to one
fail.

9

9

FEATURES OVERLAY

The DMS-6 D-Clock-R is designed for standard 19" rack
mounting and occupies 1U of rack space. Avoid mounting
the unit directly above power amplifiers or power supplies
that radiate significant amounts of heat.
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
carrying rack to avoid bending the front panel rack mounting
‘ears’. Use fibre or plastic washers to prevent the front panel
becoming marked by the mounting bolts.
Always connect the mains earth to the unit.

INSTALLATION

The DMS-6 D-Clock-R is fitted with two identical and
independent power supply units, providing Dual
Redundancy. Either can be used solely to supply power
to the unit, but in situations where it is critical that power
must be maintained mains power should be supplied to
both units. With both power supplies receiving power the
units will share the load, however, should either fail, the
other is capable of fully driving the unit.

The unit will be supplied with two power cables
suitable for domestic power outlets in your country.
For your own safety it is important that you use
these cables. The unit should always be connected
to the mains supply earth using at least one of these
cables.

Powered by dual universal switch mode power supplies,
the DMS-6 D-Clock-R operates from mains voltages
between 85 - 250v, eliminating the need to make any
changes when touring and allowing the unit to remain fully
operational during large fluctuations in the mains power
supply.

POWER CONNECTION

Active PSU LED’s:

Two led’s showing which of the two
PSU inputs 9 is operational.

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6

SIMPLE CONNECTION GUIDE

CHAPTER 2

Word Clock / AES-3id

Use only good quality 750 digital or video coax (not aerial
downlead) cable for the word-clock signals, terminated with
the correct type of 75Ω BNC connectors - inferior cables
will introduce jitter and will completely undermine the
performance benefits which might be achieved by using a
master clock in the first place!

AES3id calls for unbalanced 75 ohm connections, which
make its hardware requirements the same as S/PDIF
connections, though AES3id is implemented with BNC
connections instead of RCA type connections. While AES3
& AES3id have different hardware transmission methods
the data contained within the transmission is identical.

AUDIO CONNECTIONS

7

CONTROL DESCRIPTION

DISPLAY A Blue/White LCD display with 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.

FREQ

Displays the actual frequency to four decimal
places upto >768kHz.

±PPM

Displays the nominal sample rate with +/- ppm
(part per million) error indication for 32, 44.1, 48,
96 & 192KHz

± %

Displays the nominal sample rate with percentage
pull up/down indication for 32, 44.1, 48, 96 &
192KHz

The LED’s
indicate the
status of the
input sources
for both Sync1
& Sync2 in
word clock &

AES-3id.
When a led is lit continuously a strong signal
is being received by that input source and
the D-Clock-R is “locked on”. If a led flickers,
the signal for that particular input source
is weak or unstable - in this case the
source of this weak signal should be
located and improved.

CLOCK PRESENT

The two LED’s
indicate the input
source being
used - either
Sync1 or Sync2.
By default Sync1
would be used,

however, should
this signal be weak or missing
the D-Clock-R will automatically
switch to using Sync2 as the
clock input.

ACTIVE INPUT

The two LED’s
indicate the
power supply
being used ­either PSU1 or
PSU2. With both
LED’s lit the

power is shared
between the two PSU’s. A LED
unlit identifies that the PSU is not
in use and the source of this
problem should be found as soon
as it is convenient. The DMS-6
can operate via both or either of
the PSU’s.

ACTIVE PSU

8

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.

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
containers for protection. If the unit is to be returned, the
original container must be used. If this container is not
available, then the equipment should be packaged in
substantial shockproof 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 :

[e-mail]

Further information on all Drawmer dealers, Authorised
service departments and other contact information can be
obtained from our web pages on:

http://www.drawmer.com

D-Clock-R DMS-6 GENERAL INFORMATION

CHAPTER 3

INPUTS

BNC wordclock input Dual 75ohm BNC
Sensitivity Auto selecting

MAIN OUTPUTS

BNC wordclock outputs 16 x simultaneous re-buffered BNC

wordclock outputs with 33 ohm
output impedance.
4 of which are on the front panel
for ease of connectivity.

DISPLAY

Blue/white LCD display with three switchable modes of
operation with mode led indicators for each:

frequency actual frequency up to >768KHz

+/- ppm nominal sample rate with +/- ppm

error indication for 32,44.1,48,96
& 192KHz

+/-% Nominal sample rate with

percent pull up/down indication
for 32,44.1,48,96 & 192KHz

Accuracy 2ppm at all sample rates up to

768KHz

0.1 Hz increments @ 48KHz
sample rate

INDICATORS

Wordclock/AES-3id clock present led indicators
Active input led indicators
PSU active led indicators

GENERAL

Power Supply: 2 x Internal identical,

Universal Input, 10 W
for Dual Redundancy

Power Requirement <6W

Fuse Rating T500mA for All voltages.

CONFORMING TO:
IEC127-2

Fuse Type 20mm x 5mm, Class 3 Slow -

Blow. 250Volt working

Dimensions: 1u, 19" Rack Mount, Depth

145 mm

Weight 1.7 kg

SPECIFICATION

9

BLOCK DIAGRAM

Ref:1v00 A 06-03-12