Lectrosonics Quadra - Manual (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 19