Rear Panel Features And Cabling; Audio Connections - Extron electronics MLS 100 A User Manual

MLS 100 A • User Guide (Continued)

Rear Panel Features and Cabling

Turn off and disconnect power from all the equipment before you connect cables to the
MLS.

Audio Connections

1 Audio Inputs — Each of these 3-pole, 3.5 mm captive screw connectors accepts one unbalanced stereo or mono audio
input. Wire each captive screw connector as shown in figure 1, depending on the input type.
Connect two RCA-style (tip-ring) connectors to the other end of each audio input cable as shown in figure 2.
L R
Left (+) Left (+)
Gnd (Sleeve, ) Gnd (Sleeve, )
Right (+)
Audio Input Wiring Audio Input Wiring
(unbalanced, mono) (unbalanced, stereo)
Figure 1. Captive Screw Connector
2 Aux/Mix Mono audio input —The Aux/Mix Mono audio channel is always active: its signal
is output no matter which, if any, other audio input (input 1, 2, 3, or 4) is selected. For
example, you could connect the output of a wireless microphone receiver to this port so the
presenter comments can always be heard and are independent of the A/V source used for
the presentation.
The mix output level can be adjusted between ‑43 dB and +24 dB.
NOTE:
The Aux/Mix level must be adjusted physically via the front panel control. It cannot be
adjusted via software.
Connect a 3.5 mm, 3-pole captive screw connector to one end of an audio cable as shown at right.
3 Audio output (Preamp) — Connect self-powered speakers or another stereo audio device to
the MLS via this 5-pole, 3.5 mm captive screw connector. Depending on how the connector is
Audio Output Captive Screw_MLS 100.eps
wired, the audio output can be balanced or unbalanced stereo audio. Wire the connector as
shown in figure 3.
Unbalanced Output
Tip
See Caution
Sleeve (s)
Tip
See Caution
Figure 3. Figure 3.
ATTENTION:
For unbalanced audio, connect the sleeves to the ground contact. DO NOT connect the sleeves to the
negative (–) contacts.
ATTENTION :
Pour l'audio asymétrique, connectez les manchons au contact au sol. Ne PAS connecter les manchons
aux contacts négatifs (–).
After all the equipment has been cabled and powered on, use the MediaLink Control Program or an RS-232 controller to
set the per-input gain/attenuation to match the correct audio output level for the kind of output (balanced or unbalanced)
you need. See Setting Up Optimal Audio Gain
determining and setting the gain/attenuation to produce the desired output levels.
NOTES:
•
If you wire an audio output for balanced output, the MLS outputs a unity signal (input level = output level). Wiring an
audio output for unbalanced output causes the audio signal to be attenuated by 6 dB.
•
Overall volume control ranges from 0% (90 dB attenuation) to 100% (0 dB attenuation). Adjustment increments are
1 dB for steps from 1% to 40% volume. Adjustments are in 0.5 dB increments from 41% to 100% of full volume.
2
AUX/MIX
L R MONO
Tip (+)
Gnd (Sleeve, )
Ring (–)
Aux/Mix Input Wiring
(balanced/unbalanced, mono)
Balanced Output
Tip
Ring
Sleeve (s)
Tip
Ring
Wiring the Connector
on page 3 and
MLS 100 A
MLS 100 A
Tip (+) Sleeve (Gnd)
Figure 2. RCA-style Connectors
L
Left (+)
Gnd (Sleeve, )
Audio Input Wiring
(unbalanced, mono)
Switcher (MLS) Config on page 13 for details on
AUDIO INPUTS AUX/MIX PREAMP MLC/RS-232
1 2 3 4
L R L R L R L R L R
MONO POWER
A B
12V .5A MAX
1 1 2 2 3 3 4 4
AUX/MIX
R L R MONO
Left (+) Tip (+)
Gnd (Sleeve, ) Gnd (Sleeve, )
Right (+) Ring (–)
Audio Input Wiring Aux/Mix Input Wiring
(unbalanced, stereo) (balanced/unbalanced, mono)