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REF 10
Installation
Shipping Contents
Your REF 10 was packaged carefully Nevertheless we recom-
mend checking the contents directly after opening the package:
1 x REF 10
1 x Power cable
1 x Manual
In the unexpected event that there are any visible damages
or missing items, please refer to the chapter »Safety Instruc-
tions« and »Warranty Regulations« for further details
Placing the Device
The unit should be set up as closely as possible to the devices
to which it will be connected to avoid excessive cable lengths
The four custom-designed case feet include a rubber ring pro-
tecting the ground's surface from being damaged and redu-
cing any structure-borne vibrations interfering with the unit
It is recommended to keep the device away from vibrating or
mechanically moving devices in close proximity
The device can be mounted into a standard 19" rack and will
require 2U (rack units) Therefore, we offer an optional rack
mounting kit called MW-07/19 This includes two rack bra-
ckets which need to be screwed to each side of the device's
case Before mounting the device into a 19" rack, please un-
screw the four rubber feet with a suitable screwdriver Install
the device so that 1U of rack space is left open both above
and below the device to allow for sufficient ventilation! For
extra secure installation we further recommend an additional
rack mounting plate that will prevent any long-term mechani-
cal deformation of the enclosure
Attention
Before installing the unit the section Safety Instructions
located at the beginning of this manual should be read
carefully! Never expose the device and accessories to
rain, moisture, direct sunlight, or excessive heat pro-
duced by radiators, heaters, or spot lights! Sufficient
air circulation in the proximity of the device must be
ensured!
8
Interface Connections
There are two standards with respect to interfaces and cable
termination for 10 MHz reference signals:
•
50 Ω impedance termination
This standard can commonly be found among units by
Japanese Hi-Fi manufacturers, and for measurement
devices in laboratory applications
•
75 Ω impedance termination
This termination is more common for devices used in
recording, mixing and broadcast studio applications
For audiophile Hi-Fi and high-end consumer audio applications
both standards are currently in use by different manufacturers
For this reason, the REF 10 provides clock outputs with both 50
and 75 Ω termination that can be used simultaneously
Transferring clock signals with 50 Ω termination is typically
done with coaxial cables according to the RG-58/U standard
However, we recommend using cables manufactured to the
RG-400/U or CLF200/HDF200 standards, because they are
double-shielded and offer reduced attenuation in contrast to
the RG-58/U norm Cables specified as CLF200/HDF200 further
feature a stronger inner copper conductor
For clock signals with 75 Ω termination it is common to use
coaxial cables specified by the RG-59/U and RG-598/U stan-
dards As an alternative, we recommend using cables manu-
factured to the RG-216/U standard, which are usually also
double-shielded, feature reduced attenuation, and a stronger
inner conductor
A wide range of coaxial cables with BNC connectors and the
appropriate termination by specialized manufacturers are avai-
lable at Hi-Fi retailers Depending on their price range they are
manufactured using premium materials and will have superi-
or transfer characteristics than the aforementioned standard
cables
All interfaces of the devices in a given setup need to be pro-
perly connected with each other Always ensure that the clock
output of the REF 10 are connected to an appropriate input
of the receiving device Make sure that the clock input of the
receiving device has the correct internal impedance termina-
tion This internal termination can sometimes be adjusted via
an external switch on the device or via a software setting We
recommend double-checking the operating manual of any
device that you are planning the REF 10 to be connected to
A mismatched termination of the system will cause losses in
signal quality and clock precision!
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