RME Audio ADI-192 DD, Руководство пользователя

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User's Guide ADI-192 DD © RME
6.2 TDIF
The ADI-192 DD has two TDIF-1 ports. 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 labelled AUX has
to be used as well.
The TDIF-1 connectors of the ADI-192 DD are fully compatible with all devices offering such an
interface*. RME's exclusive SyncCheck verifies synchronous operation when using both TDIF
ports. The connection is done through a special TDIF cable, available at your local dealer (Tas-
cam part number PW-88D).
TDIF-1 MAIN
Interface for the first or only device with a TDIF-1 interface. Carries the channels 1 to 8. When
transmitting a Double Speed signal MAIN carries the channels 1 to 4, in case of Quad Speed
channels 1 and 2.
TDIF-1 AUX
Additional port for transmission of channels 5 to 8 in Double, or 3 and 4 in Quad Speed mode.
With input signals in the Double Speed range, 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:
Channel
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 in the Quad Speed range, 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:
Channel
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 the described conversions are lossless. The existing samples are just spread or re-united
between the channels.
General Notes
*DA98HR
The Quad Wire method of the ADI-192 DD allows to record two channels at up to 192 kHz with
every (!) DTRS device. Unfortunately Tascam's TDIF implementation is incompatible to Quad
Wire, as the samples are not transmitted in the order of 1-2-3-4, but 1-3-2-4. In case the special
192 kHz mode of the DA-98HR shall be used, the machine should be connected and used with
the ADI-192 DD via AES.
TDIF and Word Clock
When the ADI-192 DD is slave no additional word clock connection is necessary. In case DA88
and/or DA38 are slave the word clock output TDIF of the ADI-192 DD has to be connected to
the word clock input of the first (master) recorder. When using more than one recorder all ma-
chines should be connected with a special sync cable (Tascam part number PW-88S).
Emphasis
The ADI-192 DD's TDIF interface supports Emphasis. Please note that an Emphasis indication
is lost with transfers to ADAT optical. Emphasis does not exist in the ADAT specification.