RME Audio Hammerfall HDSP 9632 User Manual page 39

If several digital devices are to be used simultaneously in a system, they not only have to oper-
ate with the same sample frequency but also be synchronous with each other. This is why digi-
tal 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
Reference 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 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.
Thanks to its AutoSync technique and lightning fast PLLs, the HDSP 9632 is not only capable of
handling standard frequencies, but also any sample rate between 28 and 200 kHz. Even the
word clock input, which most users will use in varispeed operation, allows any frequency be-
tween 28 kHz and 200 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 field SPDIF Freq. differs from the one shown in 'AutoSync Ref'. The
card automatically switches to S/MUX 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.
User's Guide HDSP System HDSP 9632 © RME
39