Drawmer DMS-5 M-Clock Plus AES Grade 1 Master Clock / Dual Sample Rate Conv. - Manual (Page 4)

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The DMS-5 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. 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.
Powered by a universal switch mode power supply, the
DMS-5 M-Clock Plus operates from mains voltages be-
tween 85 - 250v, eliminating the need to make any changes
when touring and allowing the unit to remain fully opera-
tional during large fluctuations in the mains power supply.
INSTALLATION
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.
The output socket fully conforms to the EMC standards; if
the unit is to be used where it may be exposed to high
levels of disturbance, such as found close to a TV or radio
transmitter, it is suggested that the screen of the data cable
be connected to the chassis connection on the XLR type
connector rather than to pin 1.
If ground loop problems are encountered, never disconnect
the mains ground, but instead, try disconnecting the signal
screen on one end of each cable connecting the outputs.
S/PDIF
Is via a high quality RCA type phono jack where the data
conforms to the SonyJ PhillipsJ Digital InterFace format.
Because this connector only provides an unbalanced
termination, the recommended maximum length for this
cable is 3 metres, even with very high quality cable.
TOSLINK (or EIAJ)
The real benefit of TOSlink is that it is not susceptible to
electromagnetic noise, however, it is highly recommended
that a very good quality cable is used as the plastic
conductors used in cheap cables can damage data.
Additionally performance is compromised over long lengths
of cable, as the signal strength weakens due to impurities
in the conductive material, therefore lengths of no longer
than five metres is recommended unless using a signal
booster..
Though the connectors are the same TOSLink and ADAT
Optical are not compatible with each other.
Word Clock
Use only good quality 75
Ω digital or video coax (not aerial
downlead) cable for the word-clock signals, terminated with
the correct type of 75
Ω 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!
SIMPLE WORDCLOCK DISTRIBUTION SETUP