Extron electronic MLS 103 SV Setting Up Optimal Audio Gain, Control and power connections

Installation, cont’d

Control and power connections

11 MLC/RS-232 Power port (all models) — An Extron MediaLink Controller (MLC 206), a computer, or a third party RS-232 controller provides remote control of input switching and volume, and also provides a way to set the switcher’s audio input levels. To control and/or set up the MLS, connect a cable between this 5-pole 3.5 mm captive screw connector and an optional MLC 206, computer, or a third party RS-232 controller. Also connect an external 12VDC power supply here to provide power to the MLS and to the optional MLC.

Extron Comm-Link cable is recommended for this connection. If you use Comm-Link cable, the switcher and controller can be up to 250 feet (76.2 m) apart. Wire the captive screw connector for connection to either an MLC 206 or third party controller as shown in the picture on the next page.

• For a stand-alone MLS switcher, connect a cable from the host computer or a third party control system to this connector to set up and remotely control the switcher, connect a 12VDC power supply, and tie all the drain wires to the same ground.

• For an MLS switcher slaved to an MLC controller, connect a cable from the MLC’s MLS/Power port and from a 12VDC

Once the system has been cabled and set up via the control software and the front panel Aux/Mix adjustment, the MLC or a host computer communicating through the MLC can be used to remotely control the switcher. Refer to chapter four of the MediaLink Controllers User’s Manual and to the MediaLink Control Program help file for details on configuring an MLC-MLS system.

An Extron IR Link infrared repeater cannot be used with the MLS 100 Series switchers. There is no connection for that device’s control signals.

The MLC to which the MLS 100 Series switcher is connected must have MLC firmware version 1.04 or higher. The control/setup software must be version

2.0 or higher. Use one of the following methods to find

out the version levels of the MLC’s firmware and the

control software.

• Connect the MLC’s RS-232 port to a computer or

RS-232 controller, and send an SIS command (see

chapter four) of Q to the MLC. The MLC will respond

with its firmware version.

• Connect the MLC’s RS-232 port to a computer, start

the MediaLink control software

MLC/RS-232

power supply, and tie all the drain wires to the same ground.

(see chapter four), and click on

Help to display the software

POWER	MLS100Series
	Switcher
A B	MLC/RS-232
	Power Port

1

2

3

INPUTS

OUTPUT

AUDIO INPUTS

AUX/MIX

OUT

CONTROL/

L

1

R

L

2

R

L

3

R

L

4

R

MONO

L

R

POWER

A B

MLS 103 V

12V

.5A MAX

			MLS 103 V
+12VDC input			Rear Panel
Ground ( )				External
				Power Supply
		External		250 ft
		Power Supply
				(76.2 m)
		(12VDC, 1A max.)
				max.
Ground all devices
+12VDC
Ground ( )		A B C D E A B C D E	1A 1B 2A 2B 3A 3B A B C D	1 2 3 4 5 6 A B
		IR RS-232		Tally Out MLS/Power
		Display/Source Control	Relays IR/RCM	Extron Switcher Control
B Receive (Rx)	Transmit (Tx) B	MLC 206 Bottom Panel
A Transmit (Tx)	Receive (Rx) A

NOTE If you use cable that has a	MLC 206's	NOTE You must connect a
drain wire, tie the drain wire	MLS/Power
		ground wire between
to ground at both ends.	Port
		the MLC and MLS.
A B

version, the MLC’s firmware

version, and the MLS’s

firmware version as shown in

the example at right.

If your MLS’s firmware is an earlier version, contact

Extron to obtain updated firmware.

Setting Up Optimal Audio Gain

Audio input levels and desired output levels vary depending on the types of equipment involved. Before setting the MLS’s per- input gain or attenuation, determine the levels of the input and output equipment. Use the table below as a general guide.

Typical Audio Levels for Various Equipment Types

	Input/Output Levels
	+4dBu 0dBu		-10dBV	-20dBV
			(-8dBu)	(-18dBu)
Professional line level audio equipment X		X

Connecting an MLC 206

MLS / Power

Equipment Categories Consumer audio equipment (VCRs, DVDs, X X

to a MediaLink VersaTools Switcher and an external power supply

laptop computers, portable audio devices)

2-8 MediaLink VersaTools Switchers • Installation MediaLink VersaTools Switchers • Installation 2-9