User's Manual

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User’s Guide ADI-2 DAC v2.2 © RME
DC detected (Phones)
DC detection is crucial to prevent the sensitive phones drivers
from being destroyed by inaudible currents flowing through
them. As the ADI-2 DAC is fully DC coupled from DAC to
phones output, a digital full scale signal with 0 Hz would
produce up to 15V DC at the outputs, and destroy any
attached phone immediately. In case the power output stage
fails the same could happen. Therefore the phones outputs
will switch off with 1.8V DC detected.
Power Fail
In case the operating voltage drops below 9.3V the internal
power supply of the analog I/Os is switched off (overcurrent
protection). However the digital part will operate even with
only 5V. Therefore connecting a wrong power supply could
pretend a fully working unit - which just doesn't receive or
emit any audio. This warning screen informs about the
undervoltage problem.
Internal Error
During power-on the unit performs a self-test. When this test
fails USB will be deactivated, with record and playback no
longer functional. In such a case please contact your local
RME distributor.
The ADI-2 DAC also shows Info Messages during normal operation, to explain the current
state and to point out possible problems.
At input SPDIF, a Non-Audio Channel Status causes the DA section to be muted. An info
message Non-Audio signal at SPDIF input gives a hint why there is currently no analog audio at
the outputs present.
In USB mode, an Emphasis Channel Status brings up the info message Emphasis detected at
SPDIF input. This reminds the user that the Emphasis indication gets lost when recording
through a computer.