Digital X Bus

3. LINE CARD

The Line card has two female DB25 connectors. One provides eight balanced line-level inputs, and the other provides eight balanced line-level outputs. They use the TASCAM standard pinout for analog signal connections (the same standard used on the analog cards for the Mackie D8B and Hard Disk Recorder). If you are connecting these to another device using the same DB25 standard, you can use a DB25-to-DB25 audio cable. Otherwise, you will need to use DB25 cables that breakout to XLR, 1/4" TRS, or TT connectors.

Refer to Appendix B for a wiring diagram of these connectors.

The Line card also has the –10 dBv/+4 dBu jumpers (described for the Mic/Line 4 card) that can be left in place (for +4 dBu operation) or removed (for

–10 dBv operation).

Note: The Mic/Line 4 card, Mic/Line 8 card, and Line card all support analog-to-digital conversion at sampling rates up to 192 kHz and word lengths of either 16 or 24 bits.

4. DIGITAL CARD

This card provides up to eight channels of digital audio in two formats; TDIF-1 on a DB25 connector and ADAT optical on four TOSLINK connectors.

The input type is selected in software (either TDIF or ADAT). However, just because we can, we made both sets of outputs alsways active for you to use. This makes the Digital card a great format converter between TDIF-1 and ADAT optical digital devices.

At 44.1/48 kHz sample rates, each optical TOSLINK connector provides either eight inputs or eight outputs of digital audio. At 88.2/96 kHz sample rates, the S/MUX protocol is used to provide four channels of I/O on the “A” connectors, and four channels of I/O on the “B” connectors. At 176.4/192 kHz sample rates, the S/MUX II protocol is used to provide two channels of I/O on the “A” connectors and two channels of I/O on the “B” connectors, for a total of four inputs and outputs.

Note: The TDIF connector does not operate above 96 kHz.

5. AES/EBU CARD

The AES/EBU card has one DB25 connector, providing eight channels of digital I/O in the AES/EBU format.

The original AES/EBU specification (IEC958 Type 1) provides for carrying two channels of digital audio at resolutions up to 24-bit at 48 kHz. When higher sampling rates became possible, two methods were developed to transmit digital audio at the higher sample rates — double-fast and double-wide.

The double-fast method (also called single-wire) clocks the digital I/O port at twice the speed to get twice the information through, providing support for resolutions up to 24-bit at 96 kHz.

The double-wide method (also called dual-wire) transmits one channel of digital audio instead of two channels through a single digital I/O port, again providing support for resolutions up to 24-bit at 96 kHz.

The AES/EBU card currently uses the double-fast method, so eight channels of digital I/O are supported up to 192 kHz.

D • SLOT

SYNC

 

 

 

C • SLOTS

 

 

B • SLOTS

 

 

A • SLOTS

 

 

 

 

SYNC CARD

 

MIX OUT CARD

DIGITAL CARD

FIRE CARD

AES CARD

LINE CARD

LINE CARD

MIC/LINE 8 CARD

MIC/LINE 4 CARD

 

MIC/LINE 4 CARD

 

 

 

 

IN

 

 

 

 

 

 

 

1

 

1

 

 

IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WORD

 

 

AES/EBU

 

 

 

 

 

 

 

 

 

 

 

CLOCK

OUT

 

TDIF

 

I/O

OUT

OUT

OUT

2

 

2

 

 

 

 

 

 

 

 

 

 

OUT

 

 

 

I/O

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IN

 

 

SPDIF

 

 

 

 

 

 

3

 

3

 

 

 

IN

OUT

 

 

 

 

 

 

 

 

 

SMPTE

 

 

 

OPTICAL

 

 

 

 

 

 

 

 

 

 

 

 

 

IN A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUT

 

 

SPEAKERS

 

 

 

 

 

 

 

 

 

 

 

L

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

 

 

 

 

IN

4

 

4

 

 

 

 

 

IN B

 

 

IN

IN

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

R

 

 

 

 

 

 

 

 

 

 

 

 

 

 

B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OUT A

 

 

 

 

 

 

 

 

 

 

 

1

 

PHONES

 

 

 

 

 

 

5

6

5

6

 

 

 

2

 

 

 

 

 

 

 

 

 

 

 

OUT B

 

 

 

 

 

 

 

 

 

 

 

L

 

MIX OUT

 

 

 

 

 

 

7

8

7

8

 

 

 

R

 

 

 

 

 

 

 

 

 

 

10

X.200