RME Audio ADI-192 DD, Руководство пользователя

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User's Guide ADI-192 DD © RME
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6.3 ADAT Optical
The ADI-192 DD has two ADAT optical inputs. In standard operation only the port labelled
MAIN is used. Higher sample rates than 48 kHz are realized by sample multiplexing. When
using more than four channels at Double Speed or two channels at Quad Speed, the port la-
belled AUX has to be used as well.
The ADAT optical inputs of the ADI-192 DD are fully compatible with all ADAT optical outputs.
RME's unsurpassed Bitclock PLL prevents clicks and drop outs even in extreme varipitch op-
eration, and guarantees a fast and sample accurate lock to the digital input signal. A standard
TOSLINK cable is sufficient for connection.
ADAT MAIN
Interface for the first or only device sending an ADAT signal to the ADI-192 DD. Carries the
channels 1 to 8. When receiving an S/MUX signal, MAIN carries the channels 1 to 4, in case of
S/MUX4 MAIN carries channels 1 and 2.
ADAT AUX
Additional port for receiving channels 5 to 8 in S/MUX, or 3 and 4 in S/MUX4 mode.
With input signals encoded as S/MUX, the SRC (RANGE) or the Clock Section (STATE) have
to be switched into DS mode manually, depending on the current application. Each port carries
the data of 4 channels only, for up to 8 channels MAIN
and AUX have to be used. 16 input
channels 44.1/48 kHz are converted to 8 channels 88.2/96 kHz as follows:
ADAT
Port 1/2
MAIN
3/4
MAIN
5/6
MAIN
7/8
MAIN
1/2
AUX
3/4
AUX
5/6
AUX
7/8
AUX
Samples 1a/b 2a/b 3a/b 4a/b 5a/b 6a/b 7a/b 8a/b
With input signals encoded as S/MUX4, the SRC (RANGE) or the Clock Section (STATE) have
to be switched into QS mode manually, depending on the current application. Each port carries
the data of 2 channels only, for up to 4 channels MAIN
and AUX have to be used. 16 input
channels 44.1/48 kHz are converted to 4 channels 176.4/192 kHz as follows:
ADAT
Port 1/2
MAIN
3/4
MAIN
5/6
MAIN
7/8
MAIN
1/2
AUX
3/4
AUX
5/6
AUX
7/8
AUX
Samples 1a/b 1c/d 2a/b 2c/d 3a/b 3c/d 4a/b 4c/d
All these conversions are lossless. The existing samples are just re-united across the channels.