Instruction manual

Stereo Audio Input/Output Boards

Optima SD Instruction Manual

To attach stereo audio input and output wires:

Unscrew the clamps on the audio connector.

2. Insert the wires (FIG. 24) for wire placement for balanced and unbalanced audio) and firmly

re-tighten the clamps to make proper connections.

Note: For stereo audio signals using twisted pair wire, connect the shield (ground) only at one end

(recommend receiving end) to minimize low frequency noise.

Wiring Sources & Destinations

Source and destination devices will require either balanced (differential) or unbalanced (single-ended)

connections. FIG. 25 illustrates the options for wiring between the sources and the input connectors and

between the output connectors and the destinations. More than one of these options can be used in the

same system. For balanced and unbalanced wiring details, see FIG. 24.

Note: For instructions on replacing boards, see “Appendix C – Replacing I/O Boards” on page 67.

FIG. 24 Balanced & unbalanced stereo audio wiring

FIG. 25 Options for source-to-Optima SD-to-destination 5-term wiring

Balanced audio

Unbalanced audio

Source balanced

– wired balanced

Source balanced

– wired unbalanced

Source unbalanced

– wired unbalanced

Destination balanced

– wired balanced

Destination balanced

– wired unbalanced

Destination unbalanced

– wired unbalanced

Grey = Ground

Input Connectors

Output Connectors

Optima SD Stereo Audio

5-Term Wiring