Apogee X-HD Benutzerhandbuch - Seite 8

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X-HD card – User's Guide

Clock Connections

Incorporating a SYNC I/O

When using a Digidesign SYNC I/O, we recommend that it be made the clock master of the

system; any jitter generated by the SYNC I/O will be sufficiently attenuated by the Apogee

interface's clock circuitry.

To configure the SYNC I/O as clock master, please follow these steps:

1 Connect a word clock cable from the SYNC I/O Word Clock Out to the Master Clock or

first Apogee interface Word Clock In; connect all remaining interfaces as described on the

previous page.

2 Open a Pro Tools session, choose Setup > Session.

3 Click on the SYNC Setup & Time Code Offsets triangle to reveal the SYNC Setup box.

4 Set Clock Reference to Internal/VSO.

5 The first Apogee interface should automatically switch to its external word clock source.

Clocking Digidesign and other HD-compatible interfaces

To clock Digidesign or other HD-compatible interfaces, we recommend following the same

guidelines as presented on page 5.

As is generally accepted, using a master clock to synchronize the clock of several digital

devices is always the best practice.

Because the word clock inputs of Digidesign interfaces are internally terminated, it's not

possible to configure clock with BNC "T" connectors when connected 2 or more Digidesign

interfaces.

APOGEE ELECTRONICS

X-HD card – User's Guide

DigiLink Connections

Once the desired order of interfaces has been determined, connect a long DigiLink cable from

the Digidesign PCI to the first interface and short Digilink cables between all the interfaces as

shown below.

Use only 18" Digilink cables to make connections between hardware interfaces.

After all clock and Digilink connections have been made, ensure that all devices are locked to

a valid clock before starting the computer.

HD Card

(Pro Tools PCI card installed in computer)

Like Digidesign interfaces, the X-HD card is equipped with two ports, Primary and Expansion.

Please note that the Primary Port on the X-HD card is the LEFT connector when looking from the

back of the unit.

this is the

PRIMARY PORT

APOGEE ELECTRONICS

(X-HD Cards installed in Apogee converters)

this is the

EXPANSION PORT