Extron electronic 450 Plus Series manual Audio input and output models with audio only

Audio input and output (models with audio only)

By default, the audio ties follow the video ties. Audio breakaway, which can be activated via the front panel or under Ethernet or serial port control, allows you to select from any one of the audio input sources and route it separately from its corresponding video source. See chapter 3, “Operation”, chapter 4, “Programmer’s Guide”, chapter 5, “Matrix Software”, and chapter 6, “HTML Operation” for details.

Captive screw connector models (all except MAV Plus 128 AV RCA)

4Connections for balanced and unbalanced audio inputs — Each input has a 3.5 mm, 5-pole captive screw connector for balanced or unbalanced stereo audio input. Connectors are included with each switcher, but you must supply the audio cable. See figure 2-16 to wire a connector for the appropriate input type. Use the supplied tie-wrap to strap the audio cable to the extended tail of the connector. High impedance is generally over 800 ohms.

Tip Sleeve

Tip

Sleeve

L	Tip
	Ring
	Sleeve (s)
R	Tip
	Ring

L R

Do not tin the wires!	Unbalanced Stereo Input	Balanced Stereo Input
	(high impedance)	(high impedance)

Figure 2-16 — Captive screw connector wiring for audio inputs

CAUTION

The length of the exposed (stripped) portion of the copper wires is important. The ideal length is 3/16" (5 mm). Longer bare wires can short together. Shorter bare wires are not as secure in the direct insertion connectors and could be pulled out.

CAUTION

The captive screw audio connector can easily be inadvertently plugged partially into one receptacle and partially into an adjacent receptacle. This misconnection could damage the audio output circuits. Ensure that the connector is plugged fully and only into the desired input or output.

See figure 2-17 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 2-16 and figure 2-18.

Tip (+)

Sleeve ()

Tip (+)

Ring (-)

Sleeve ()

RCA Connector	3.5 mm Stereo Plug Connector
	(balanced)

Figure 2-17 — Typical audio connectors

The audio level for each input can be individually set via the front panel or Ethernet or serial port control to ensure that the level on the output does not vary from input to input. See chapter 3, “Operation”, chapter 4, “Programmer’s Guide”, chapter 5, “Matrix Software”, and chapter 6, “HTML Operation” for details.

CrossPoint 450 Plus and MAV Plus Switchers • Installation 2-13