Steadyclock; Hotline - Troubleshooting; General - RME Audio Hammerfall HDSP 9632 User Manual

18. SteadyClock

The Hammerfall DSP 9632's SteadyClock technology guarantees an excellent performance in
all clock modes. Its highly efficient jitter suppression refreshes and cleans up any clock signal,
and provides it as reference clock at its digital outputs.
SteadyClock has
developed to gain a stable and clean
clock from the heavily jittery MADI
data signal (the embedded MADI clock
suffers from about 80 ns jitter). Using
word clock, SPDIF and ADAT, you'll
most probabaly never experience such
high jitter values. But SteadyClock is
not only ready for them, it would
handle them just on the fly.
Common jitter values in real world
applications are below 10 ns, while a
very good clock will have less than 2
ns.
The screnshot shows an extremely jittery SPDIF signal of about 50 ns jitter (top graph, yellow).
Thanks to SteadyClock this signal turns into a clock with less than 2 ns jitter (lower graph,
blue). The cleaned and jitter-freed signal can be used as reference clock for any application,
without any problem. The signal processed by SteadyClock is of course not only used
internally, but also available at the card's optional two word clock outputs. It is also used to
clock the digital outputs.

19. Hotline - Troubleshooting

19.1 General

The newest information can always be found on our website www.rme-audio.com, section FAQ,
Latest Additions.
The input signal cannot be monitored in real-time
ASIO Direct Monitoring has not been enabled, and/or monitoring has been disabled globally.
The first 8 channels don't seem to work
SPDIF output has been switched to ADAT. This means that the first ADAT output device,
and therefore the first 8 channels in the ASIO application, are no longer available. All
channels and their assignments still exist, but the optical transmitter has been disconnected
from the ADAT and is now fed from the SPDIF output (channels 9/10).
Playback works, but record doesn't:
Check that there is a valid signal at the input. If so, the current sample frequency is
displayed in the Settings dialog.
Check whether the Hammerfall DSP has been selected as recording device in the audio
application.
Check whether the sample frequency set in the audio application ('Recording properties' or
similar) matches the input signal.
Check that cables/devices have not been connected in a closed loop. If so, set the
systems's clock mode to 'Master'.
been originally
User's Guide Hammerfall DSP 9632 © RME
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