Service manual

APEX — Installation and Service Manual 47

Facility Interface

Audio Signals

The multi-format support of the Apex router includes AES digital audio

Ohm unbalanced, and AES digital audio 110 Ohm balanced. Multi-

plexed Audio Digital Interface (MADI)

and Dolby E support is provided.

The Apex chassis can accommodate four types of I/O boards:

•75 Ohm, 32 input pairs

•75 Ohm, 32 output pairs

• 110 Ohm, 32 input pairs

• 110 Ohm, 32 output pairs

A 256 x 256 75 Ohm system with eight input boards and eight output

boards is shown on

Figure 3 on page 33.

A 256 x 256 110 Ohm system with eight input boards and eight output

boards is shown on

Figure 4 on page 34. (Pinouts for the D connectors are

shown on Figure 38 on page 91.)

The Apex system can automatically detect a signal’s type (synchronous or

asynchronous), its rate (from 30 kHz to 100 kHz), and then switch it prop

erly—without any additional modifications or intervention. It can also

switch a signal that has lost its reference.

Apex routers utilize a silent-switching design to minimize unwanted clicks

and pops. You can turn this feature on or off as needed.

The Apex architecture allows a control system to view the router as either

a single-level stereo system in which the pairs always switch together, or as

a two-level stereo system, which allows the Apex system to support a full

complement of audio pair manipulation modes, including normal, mix,

and reverse.

See MADI Support on page 53.