Lectrosonics Quadra User Manual download pdf (Page 19)

Digital IEM System

Initial Setup

Connect AC power to the M4T transmitter using the

provided power cable. To ensure that the power cable

can not come loose, use the provided wire retainer.

Attach the supplied antenna to the antenna port on the

back of the M4T, and position it pointing upright while

tightening the knurled nut at the base of the antenna.

If you are rack-mounting one or more M4T transmit-

ters, please see the section on installing rack mounting

hardware on pages 22–25.

Connect your audio inputs via the XLR connectors.

Note that, like a mixing console, the inputs are oriented

right to left, jacks 1-4. If you are feeding the transmitter

with analog audio signals, connect your channel 1 to

jack 1, channel 2 to jack 2 and so on.

If you are sending digital AES/EBU signals to the M4T

transmitter, note that AES/EBU lines carry two chan-

nels on a single XLR connection. Therefore, channels

1 & 2 would be connected to jack 1, and channels 3

& 4 are connected to jack 2. Note also that in order to

select between analog and digital inputs, use the front

panel menu as incicated on page 20.

Powering the Unit

ON and OFF

Once you have connected AC power, the antenna,

and your audio lines, apply power to the M4T using

the switch on the front panel. The LCD displays a brief

logo and graphic, followed by the model number, de-

scription and ﬁrmware version:

After the Power Up Sequence, the Main Window ap-

pears and the M4T is ready for operation.

To turn the transmitter off, simply return the front panel

power switch to the “off” position.

LCD

The Main Window shows the following:

• Operating frequency

Frq1, Frq2, etc. for 4 channel or Split operation

Frq1a, Frq1b, Frq2a, etc. for 2 channel operation –

see Channel Setup on page 16

• Audio level meters for either two or four channels

(depending on how the M4T is set up - see Chan-

nel Setup on page 16

• Headphone monitoring channels as indicated by

the small headphone icons next to the level meters

for those channels

Audio Signal Monitoring

The signals at the inputs can be monitored in two

ways: using the LCD bar-graph meters for levels and

with headphones listening to the actual signals. The

LCD bar-graph meters show the audio level range from

-60 to 0 dB. When the signal exceeds +20 dBu at an

input, the bar graph indicates this with a bright “!” at the

top of the bar on that channel. Because this is a digital

system, overloads should be scrupulously avoided so

as to prevent signal distortion at the converters.

NOTE: Do not “drive” this transmitter as you might be

tempted to do with an analog IEM system. Generally, it

is best to leave at least 3 dB of headroom above your

strongest peaks to ensure that you are not clipping the

signals.

Clipping Indicator

To monitor the audio signal/s, plug into the headphone

jack with headphones or earbuds. Push the volume

knob so that it “pops out” for level adjustment. To

select the channel/s for listening, press the numbered

button/s 1-4 below those channels. Either one or two

channels at a time can be monitored. When a single

channel is chosen, it is panned center in the head-

phone stereo ﬁeld. When two channels are chosen

by pressing both buttons at the same time, they are

panned hard left & right in the headphones.

CAUTION: Start with the monitor volume

at a low setting before plugging in your

headphones or earbuds - excessive volume

can damage your hearing.

Rio Rancho, NM

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Lectrosonics Quadra User Manual Page 19

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