Extron electronic ISM 482 - Manual (Page 20)

2-5 Integration Scaling Matrix Switcher • Installation
3 Input audio connectors — Connect balanced or unbalanced stereo or mono
audio sources to these 3.5 mm, 5-pole captive screw connectors. Connectors
are included with the seamless switcher, but you must supply the audio cable.
Figure 2-4 shows how to wire a connector for the appropriate input type.
High impedance is generally over 800 ohms.
LR LR
Unbalanced Stereo Input
Tip
Sleeve
Tip
Sleeve
Balanced Stereo Input
Tip
Ring
Sleeve (s)
Tip
Ring
(high impedance) (high impedance)
0.2” (5 mm) max.
Do not tin the wires!
Figure 2-4 — Captive screw connector wiring for inputs
CAUTION The length of exposed wires is critical. The ideal length is 0.2" (5 mm).
• If the stripped section of wire is longer than 0.2", the exposed wires
may touch, causing a short circuit between them.
• If the stripped section of wire is shorter than 0.2", wires can be easily
pulled out even if tightly fastened by the captive screws.
When making connections for the seamless switcher from existing audio cables,
see figure 2-5. A mono audio connector consists of the tip and sleeve. A stereo
audio connector consists of the tip, ring and sleeve. The tip, ring, and sleeve
wires are also shown on the captive screw audio connector diagram, figure 2-4.
Tip (+)
Sleeve ( ) Sleeve ( )
Ring (-)
Tip (+)
RCA Connector
3.5 mm Stereo Plug Connector
(balanced)
Figure 2-5 — Phono audio connectors
The audio level for each input can be individually set, via the front panel, the
Ethernet link, or the RS-232 link, 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, “Switcher Software”, and chapter 6,
“Ethernet Operation”, for details.