Preliminar y – Extron Electronics Matrix 12800 Series User Guide User Manual

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Matrix 12800 Switchers • Installation

PRELIMINAR

For audio inputs and outputs, the length of exposed wires is critical. The ideal

length is 3/16-inch (5 mm).

• If the stripped section of wire is longer than 3/16-inch, the exposed wires may

touch, causing a short circuit between them.

• If the stripped section of wire is shorter than 3/16-inch, wires can be easily

pulled out even if tightly fastened by the captive screws.

Balanced and unbalanced audio input connectors — Each input has a

3.5 mm, 5-pole captive screw connector for balanced or unbalanced stereo

audio input. Connectors are included with each Matrix 12800 audio switcher,

but you must supply the audio cable

See figure 2-10 to wire a connector for the appropriate input type and

impedance level. Use the supplied tie-wrap to strap the audio cable to the

extended tail of the connector.

Unbalanced Stereo Input

Balanced Stereo Input

Do not tin the wires!

Tip

Ring

Tip

Ring

Sleeves

Tip

Sleeve

Tip

Figure 2-10 — Captive screw connector wiring for inputs

See figure 2-11 to identify the tip, ring, and sleeve when you are making

connections for the switcher from existing audio cables. A mono audio connector
consists of the tip and sleeve. A stereo audio connector consists of the tip, ring
and sleeve. The ring, tip, and sleeve wires are also shown on the captive screw
audio connector diagrams, figure 2-10 and figure 2-12.

Tip (+)

Sleeve ( )

Ring (-)

Tip (+)

RCA Connector

3.5 mm Stereo Plug Connector

(balanced)

Figure 2-11 — Typical audio connectors

The audio level for each input can be individually set, via the front panel

controller, either RS-232/RS-422 port, or the Ethernet port, to ensure

that the level on the output does not vary from input to input. See the

Matrix 12800 Switcher Front Panel Controller User Guide