Changing The Jumper Settings - RME Audio MULTIFACE User Manual

If several digital devices are to be used simultaneously in a system, they not only have to
operate with the same sample frequency but also be synchronous with each other. This is why
digital systems always need a single device defined as 'master', which sends the same clock
signal to all the other ('slave') devices. RME's exclusive SyncCheck technology (first
implemented in the Hammerfall) enables an easy to use check and display of the current clock
status. The 'SyncCheck' field indicates whether no signal ('No Lock'), a valid signal ('Lock') or a
valid and synchronous signal ('Sync') is present at each of the digital clock source inputs. The
'AutoSync Ref' display shows the current sync source and the measured frequency.
In practice, SyncCheck provides the user with an easy way of checking whether all digital
devices connected to the system are properly configured. With SyncCheck, finally anyone can
master this common source of error, previously one of the most complex issues in the digital
studio world.
Thanks to its AutoSync technique and lightning fast PLLs, the HDSP is not only capable of
handling standard frequencies, but also any sample rate between 25 and 105 kHz. Even the
word clock input, which most users will use in varispeed operation, allows any frequency
between 25 kHz and 103 kHz.
At 88.2 or 96 kHz: If one of the ADAT inputs has been selected in 'Pref Sync Ref', the sample
frequency shown in the 'SPDIF In' field differs from the one shown in 'AutoSync Ref'. The card
automatically switches to its Sample Split mode here, because ADAT optical inputs and outputs
are only specified up to 48 kHz. Data from/to a single input/output is spread over two channels,
the internal frequency stays at 44.1 or 48 kHz. In such cases, the ADAT sample frequency is
only half the SPDIF frequency.

9.3 Changing the Jumper Settings

The Multiface has internal jumpers, which allow to change input sensitivity and output level per
channel. More information on these settings can be found in chapter 8.5 and 8.6.
Please note that those jumpers are not thought of to be changed every day. They should be
changed when the unit is operated for the first time, so that it matches the Studio's
operating level. Else only change them if it is really neccessary. The factory default +4 dBu
will in most cases offer perfect results.
To change the jumper settings the Multiface must be opened. If you feel unsecure to do so
please consult a technician and let him show you how to do it. Else please follow the
instructions below step by step.
1. Remove all jacks and cables from the Multiface.
2. Loosen and remove both screws of the ADAT Sync D-sub socket.
3. Use a screwdriver (Phillips 1) to remove the 6 screws on the cover, and the upper middle
screw in the front panel of the Multiface, so that the cover can be taken off.
4. Put the device so that the front panel is in front of you. Lift the cover at the front by about
one centimeter (0.5 inch). Then pull the cover slowly about 2 centimeter (1 inch) in your
direction. When doing so the TRS jacks and the D-Sub socket will slide out of the rear panel.
The cover is now freed from the rest of the housing and can be turned to the right.
User's Guide HDSP System Multiface © RME
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