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Installation, cont’d
CrossPoint 42 HVA Matrix Switcher • Installation2-4
Audio input and output connections
4
Connections 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 CrossPoint switcher, but you must supply the
audio cable. See figure 2-3 to wire a connector for the
appropriate input type and impedance level. High
impedance is generally over 800 ohms.
Unbalanced Input
Tip
Sleeve
Tip
Sleeve
Balanced Input
Tip
Ring
Sleeve (s)
Tip
Ring
Tip
Ring
Sleeve (s)
Tip
Ring
Balanced Input
(high impedance)
(high impedance) (600 ohms)
600 ohms
600 ohms
Figure 2-3 — Captive screw connector wiring for inputs
When making connections for the CrossPoint switcher from existing audio
cables, see figure 2-4. A mono audio connector consists of the tip and sleeve.
A stereo audio connector consists of the tip, ring and sleeve.
Tip (left) Sleeve (Gnd)
Tip (left)
Ring (right)
Sleeve (Gnd)
Tip Sleeve
Unbalanced mono Unbalanced stereo
Tip (signal)
Sleeve (Gnd)
Figure 2-4 — Phono audio connectors
The audio level for each input can be individually set, via the front panel or
RS-232, to ensure that the level on the output does not vary when switching
from input to input. See chapter 3, Operation, chapter 4, Programmer’s Guide,
and chapter 5, Matrix Software for details.
5
Connections for audio outputs — These 3.5 mm, 5-pole captive screw
connectors output the selected unamplified, line level audio. Connect audio
devices, such as an audio amplifier or powered speakers. See figure 2-5 to
properly wire an output connector.
Unbalanced Output
Tip
See caution
Sleeve
Tip
See caution
Balanced Output
Tip
Ring
Sleeve (s)
Tip
Ring
Figure 2-5 — Captive screw connector wiring for audio output
CAUTION
Connect the sleeve to ground (Gnd). Connecting the sleeve to a negative
(-) terminal will damage the audio output circuits.
By default, the audio output follows the video switch. Audio breakaway,
commanded via the front panel, under RS-232 control, or Windows-based
control program, allows you to select from any one of the audio input sources.
See chapter 3, Operation, chapter 4, Programmer’s Guide, and chapter 5, Matrix
Software for details.