Extron electronic MLS 102 VGA, MLS 103 V, MLS 103 SV Audio connections, Installation, cont’d

Installation, cont’d

Audio connections	9 Aux/Mix Mono audio input (all models) —The Aux/Mix
The stereo audio inputs 1–3 ( 7 and 8 on page 2-5 and below)	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
correspond to video inputs 1, 2, and 3. All four audio inputs can
	selected. For example, you could connect the output of a
be selected via the front panel buttons, RS-232 control
	wireless microphone receiver to this port so the presenter’s
(including MLC), or the MediaLink Control Software. An audio
	comments can always be heard and are independent of the A/V
signal from one of these inputs is output only when the
	source used for the presentation.
corresponding input is selected. Using the MediaLink Control
Software you can separately adjust the level of each of these	The mix output level can be adjusted between -43dB and +24dB.
audio inputs.		The Aux/Mix level must be adjusted	AUX/MIX
Via RS-232 control audio input signals can also be switched		physically via the front panel		MONO
separately from the video signals (a feature called “audio		control. It cannot be adjusted via
breakaway”.) See pages 4-4 and 4-8.		software.

7 Computer audio inputs (MLS 102 VGA only) — These inputs

Connect a 3.5 mm, 3-pole captive screw

each accept unbalanced stereo audio input via a 3.5 mm stereo

connector to one end of an audio

mini receptacle (tip-

Tip (+)

Sleeve (Gnd)

cable as shown at right. Wire the

ring-sleeve type). If

other end to two tip-ring connectors

Tip (+)

you do not have a pre-

or one tip-ring-sleeve connector as

Gnd (Sleeve,

)

terminated audio

shown in 7 and

8 , and connect it

Ring (–)

cable, wire the mini

Ring (R, -)

between the MLS 100 Series switcher

Aux/Mix Input Wiring

jack on each end of the

Tip (L, +)

and the auxiliary audio source.

(balanced/unbalanced, mono)

cable as shown at left.

10 Audio output (Out) (all models) — Connect self-powered

Sleeve (Gnd)

speakers or another stereo audio device to the MLS via this

8 Audio Inputs (all models) — Each of these 3-pole 3.5 mm

5-pole 3.5 mm captive screw connector. Depending on how the

connector is wired, the audio output can be balanced or

captive screw

L

R

L

R

unbalanced stereo audio. Wire the connector as shown below.

connectors accepts

Unbalanced Output

Balanced Output

one unbalanced stereo

or mono audio input.

Tip

L

Tip

L

See Caution

Ring

Wire each captive

OUT

OUT

Sleeve (s)

Sleeve (s)

Tip

Tip

screw connector

R

R

See Caution

Ring

as shown at

CAUTION

Connect the sleeve to ground (Gnd). Connecting

right,

depending on

Left (+)

Left (+)

the sleeve to a negative (-) terminal will damage the

Gnd (Sleeve,

)

Gnd (Sleeve, )

the input type.

audio output circuits.

Right (+)

Audio Input Wiring	Audio Input Wiring
(unbalanced, mono)	(unbalanced, stereo)

Connect two RCA-style (tip-ring) connectors to the other end of each audio input cable as shown here:

Tip (+) Sleeve (Gnd)

Later, after all the equipment has been cabled and powered on, use the MediaLink Control Program or an RS-232controller 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 pages 2-9 and 4-10 for details on determining and setting the gain/attenuation to produce the desired output levels.

If you wire an audio output for balanced output, the MLS will output a unity signal (input level = output level). Wiring an audio output for unbalanced output causes the audio signal to be attenuated by 6dB. See pages 2-9 and 2-10 for instructions on adjusting audio gain.

2-6 MediaLink VersaTools Switchers • Installation MediaLink VersaTools Switchers • Installation 2-7