DigiDesign ADAT Bridge I/O User's Guide download pdf (Page 11)

Chapter 2: Connecting Your Studio

7

ADAT Bridge I/O Front Panel

1. Power Switch

This switch applies power to the Digidesign

ADAT Bridge I/O. The “I” position is on.

The “O” position is off.

2. Sync Mode LEDs

These LEDs indicate which master sample

clock reference is currently being used by

the ADAT Bridge I/O. The ADAT Bridge

I/O’s 16 input/outputs are divided into 2

discrete groups: Group A (channels 1-8)

and Group B (channels 9-16).

About 8- and 16-channel Modes —

Group A and Group B

Each ADAT Bridge I/O is capable of sending

and receiving 16 channels of audio. You

can connect up to two 8-channel ADATs to

each ADAT Bridge I/O. The ADAT Bridge

I/O manages its I/O in two separate 8-chan-

nel groups:

• Group A, which appears in Pro Tools I/O

pop-ups as ADAT Bridge A 1-8.

• Group B, which appears in Pro Tools I/O

pop-ups as ADAT Bridge B 1-8 (think of

these as channels 9-16)

Group A and Group B each have their own

front panel LEDs which indicate that par-

ticular group’s sync mode, channel 1-2 in-

put format, sample rate, and digital format.

Group B will always slave to Group A’s sync

mode and sample rate settings. Channel 1-

2 input is software-selectable.

Group A and Group B also each have their

own pair of rear-panel optical ports for

connection to an ADAT. Optical #1 carries

Group A, channels 1-8. Optical #2 carries

Group B, channels 9-16.

Group A and Group B also have their own

rear-panel data ports for connecting an in-

terface cable to the appropriate Digidesign

card(s) inside your computer.

If you are using a single ADAT, you will

only make connections to Group A. Use

Group B to connect a second ADAT to the

ADAT Bridge I/O or if you wish to use the

Group B digital ports (channels 9-10) for

digital effects sends and returns.

The front panel LEDs provide a convenient

troubleshooting feature. If any of the Sync

Mode or Sample Rate LEDs flash, this indi-

cates a mismatch between the signals being

received by the ADAT Bridge I/O and the

settings currently selected in Pro Tools (in

the Hardware dialog or Session Setup win-

dow). Once you have identified a problem,

Figure 1. ADAT Bridge I/O front panel

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