MUTEC MC-3+ Smart Clock - Manual (Page 11)

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Manual SDs-01 D 3.2.2003 17:45 Uhr Seite 3
11
INSTALLATION
Content of the Box
The unit was packed carefully. Nevertheless we recommend to check the
content directly after opening the package:
1 x MC-3+ Smart Clock
1 x Power cable
1 x Manual
Placing the Device
The unit should be set up as closely as possible to the devices to which it
will be connected with to avoid excessive cable lengths. The four cus-
tom-designed case feets include a rubber ring to protect the ground’s
surface from being damaged.
The device can be mounted into a standard 19“ rack and will require one
unit. Therefore, we offer an optional rack mounting kit, called MW-05/19.
This includes two rack angles which need to be screwed at each side of the
device‘s case. Before mounting the device into a 19“ rack, please unscrew
the four rubber feets with a suitable screwer. Install the device so that one
unit of rack space is left free both above and below the device to allow
for sufficient ventilation! Additional slide-in rails on the rack inside are
recommended for safe installation. This will also avoid long-term mechanical
deformation of the housing.
Wiring the AES/EBU and S/P-DIF Interfaces
AES/EBU
Connect the AES/EBU interfaces with the help of balanced electrical
cables equipped with XLR connectors on both ends. The specifications
stipulate a specific cable impedance of 110Ω (ask your retailer for a confir-
mation of this value when purchasing the cables).
S/P-DIF
Connect the coaxial S/P-DIF interfaces with help of unbalanced electrical
cables equipped with RCA connectors on both ends. The specifications stip-
ulate a specific cable impedance of 75 Ω. Ask your retailer for a confirma-
tion of this value when purchasing the cables.
Connect the optical S/P-DIF interface with the help of Toshiba TOSLINK™
compliant optical fiber cables. Here, you can use both plastic and glass
fiber-based cables. When using plastic fiber cables, lengths of 10 meters
should not be exceeded, so as to ensure the reliable transmission of signals.
Glass fiber cables can transfer data reliably even over greater distances.
Wiring the Word Clock Interfaces
To allow for the synchronization of signals, the interfaces of all devices
involved must be properly connected to each other, so as to ensure a
logical signal flow. Always be sure to connect the Word Clock output(s) to
the corresponding input(s) of the device(s) you wish to synchronize. Cable
lengths should be kept as short as possible to minimize signal losses and/or
interferences!
For the transmission of Word Clock signals, unsymmetrical cables with a
impedance of 75 Ω and BNC connectors on both ends are used. Typically,
such cables are marked with »RG-59U, RG59B/U«.
Additionally, make sure that the Word Clock input(s) has/have got a 75 Ω
terminating resistor! Most Word Clock inputs allow for enabling/disabling
the termination with a so-called »termination-switch«, which may be
located on the outside or inside of the device.
For devices which have no termination of the Word Clock input, e.g. RME
Hammerfall with Word Clock i/o, Alesis BRC or M-Audio ProFire Light
Before installing the unit the section
SAFETY INSTRUCTIONS located
at the beginning of this manual
should be read carefully.
!
The condition of the packaging material
and the device should be checked carefully
additionally. If there are any damages
please refer to SAFETY INSTRUCTIONS and
WARRANTY REGULATIONS.
Never expose the device and
accessories to rain, moisture, direct
sunlight, or excessive heat produced
by radiators, heaters, or spot lights!
Sufficient air circulation in the environment
of the device must be ensured!
!
MUTEC offers optical cables of various
lengths that have been specifically tested
for the transmission of ADAT™ and S/P-DIF
signals. Ask your local dealer for such cables!
Cables for Word Clock
If a cable with a different imped-
ance than 75 Ω is used, a dramatic
deterioration of the signal quality is the
result! In this case, the sound quality and
synchronization of all devices involved can
be impaired.
It is imperative that the lengths of all cables
connected are largely the same, as this is
the only way to ensure that all devices will
be synchronized in phase (exception: cable
tolerances).
We recommend using high-grade cables with
a good shielding. A length of max. 10 meters
(approx. 30 feets) should not be exceeded!
!
Cables for High Sampling
Rates
When working with high sampling
rates for AES3/-11 or S/P-DIF, well shielded
electrical cables are imperative to avoid
increased radiation! Standard cables are
normally useable for sampling rates up to
50.0kHz. Special shielded cables should be
used for transfer of higher sampling rates.
!