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36
User's Guide Fireface UFX+
© RME
14.2 Clock Modes - Synchronization
In the digital world, all devices must be either Master (clock source) or Slave (clock receiver).
Whenever several devices are linked in a system, there must always be a single master clock.
A digital system can only have one master! If the Fireface’s clock mode is set to 'Master', all
other devices must be set to ‘Slave’.
The Fireface UFX+ utilizes a very user-friendly, intelligent clock control, called
AutoSync
. In
AutoSync mode, the system constantly scans the digital input for a valid signal. If any valid sig-
nal is found, the Fireface switches from the internal quartz (
Clock Mode
– Current Internal) to a
clock extracted from the input signal (
Clock Mode
– Current MADI, ADAT, AES or Word). The
difference to a usual slave mode is that whenever the clock reference fails, the system will
automatically use its internal clock and operate in clock mode Master.
AutoSync guarantees that record and record-while-play will always work correctly. In certain
cases however, AutoSync may cause feedback in the digital carrier, so synchronization breaks
down. To solve this problem switch the Fireface clock mode to ‘Internal’.
RME’s exclusive
SyncCheck
technology enables an easy to use check and display of the cur-
rent clock status.
SyncCheck
indicates whether there is a valid signal (Lock, No Lock) for each
input (Word Clock, ADAT, AES, MADI), or if there is a valid
and
synchronous signal (Sync). In
the field
Clock Mode
the clock reference is shown. See chapter 39.1.
Via
Clock Source
a preferred input can be defined. As long as the Fireface sees a valid signal
there, this input will be designated as the sync source, otherwise the other inputs will be
scanned in turn. If none of the inputs are receiving a valid signal, the Fireface automatically
switches clock mode to ‘Internal’.
In some situations changing the clock mode can not be
avoided. Example: An ADAT recorder is connected to
the ADAT input (ADAT immediately becomes the
AutoSync source) and a CD player is connected to the
AES input. Try recording a few samples from the CD
and you will be disappointed - few CD players can be
synchronized. The samples will inevitably be cor-
rupted, because the signal from the CD player is read
with the clock from the ADAT. In this case the Clock
Source should be temporarily set to
AES
.
In practice, SyncCheck provides the user with an easy way of checking whether all digital de-
vices 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.
Summary of Contents for Fireface UFX+
Page 7: ...User s Guide Fireface UFX RME 7 User s Guide Fireface UFX General...
Page 12: ...12 User s Guide Fireface UFX RME...
Page 13: ...User s Guide Fireface UFX RME 13 User s Guide Fireface UFX Installation and Operation Windows...
Page 31: ...User s Guide Fireface UFX RME 31 User s Guide Fireface UFX Installation and Operation Mac OS X...
Page 41: ...User s Guide Fireface UFX RME 41 User s Guide Fireface UFX Inputs and Outputs...
Page 49: ...User s Guide Fireface UFX RME 49 User s Guide Fireface UFX Stand Alone Operation...
Page 52: ...52 User s Guide Fireface UFX RME...
Page 53: ...User s Guide Fireface UFX RME 53 User s Guide Fireface UFX TotalMix FX...
Page 55: ...User s Guide Fireface UFX RME 55...
Page 91: ...User s Guide Fireface UFX RME 91 User s Guide Fireface UFX Class Compliant Mode...
Page 97: ...User s Guide Fireface UFX RME 97 User s Guide Fireface UFX DURec Direct USB Recording...
Page 104: ...104 User s Guide Fireface UFX RME...
Page 105: ...User s Guide Fireface UFX RME 105 User s Guide Fireface UFX Technical Reference...
Page 118: ...118 User s Guide Fireface UFX RME 40 Diagrams 40 1 Block Diagram Fireface UFX...
Page 120: ...120 User s Guide Fireface UFX RME...
Page 121: ...User s Guide Fireface UFX RME 121 User s Guide Fireface UFX Miscellaneous...