Adat - RME Audio ADI-2 Pro User Manual

Output
With SPDIF identical signals are available at both the optical and the coaxial output. An obvious
use for this would be to connect two devices, i.e. using the ADI-2 Pro as a splitter (distribution 1
on 2).
Under Setup – Options – Hardware/Diagnosis – Optical Out the output format can be manually
changed from SPDIF to ADAT. Only two channels are sent via ADAT, the same that are still
available at the coaxial output.
The ADI-2 Pro's SPDIF channel status has been implemented according to IEC60958:
• 32 / 44.1 / 48 kHz, 88.2 / 96 kHz, 176.4 / 192 kHz depending on the current sample rate
• Audio use, Non-Audio
• No Copyright, Copy Permitted
• Format Consumer
• Category General, Generation not indicated
• 2-channel, No Emphasis
• Aux bits Audio Use
Pin assignment of the 9-pin D-sub connector, breakout cable SPDIF / AES
Note: The digital breakout cable is identical to the one used in the DIGI96 and other HDSP se-
ries cards.
Pin Name
1 GND
2 SPDIF Out +
3 SPDIF In +

22.3 ADAT

The optical SPDIF input is fully compatible with all ADAT optical outputs. The internal receiver
detects the format and automatically switches between SPDIF and ADAT mode. RME's unsur-
passed Bitclock PLL prevents clicks and drop outs even in extreme varipitch operation, and
guarantees a fast and low jitter lock to the digital input signal. A usual TOSLINK cable is suffi-
cient for connection.
To not break the concept and to simplify operation, only channels 1/2 of the ADAT input signal
are taken. Even in multi-channel USB mode ADAT uses only the SPDIF input channels 5/6 –
not more. Still the information of all 8 ADAT channels is used in two cases: in SMUX (96 kHz)
and SMUX4 (192 kHz) operation, where channels 1/2 are built up from the information spread
about 4 and 8 channels. And in Digital Through mode, where only channels 1/2 can be moni-
tored, but all 8 channels are passed through to the output if set to ADAT (see below).
ADAT input supports the unofficial signalling of double speed mode, 88.2 and 96 kHz. In slave
mode the clock will automatically jump into double speed mode than. Several RME interfaces
support such a signalling.
Under Setup – Options – Hardware/Diagnosis – Optical Out the output format can be manually
changed from SPDIF to ADAT. Only two channels are sent via ADAT, the same that are still
available at the coaxial output.
46
Pin Name
4 AES Out +
5 AES In +
6 SPDIF Out -
User's Guide ADI-2 Pro © RME
Pin Name
7 SPDIF In -
8 AES Out -
9 AES In -