Lectrosonics Quadra User Manual download pdf (Page 21)

Digital IEM System

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Audio Trim

When using analog inputs, this feature gives you the

opportunity to adjust the transmitter input gain in 1

dB increments, on a per-channel basis. For very “hot”

analog signals from the console, you may need to

attenuate the input gain to compensate, thus avoiding

clipping and the resulting signal distortion.

To select audio input trim levels, use the UP/DOWN

arrow buttons to highlight Audio Trim, then use the

MENU/SEL button to enter this page.

In this example, channels 1 and 2 are set for AES/EBU

digital inputs, and channels 3 and 4 are set for analog

inputs. The Audio Trim page will vary depending upon

the input types that have been selected.

Example:

Input channels 1 and

2 are set for AES/EBU

digital signals

Input channels 3 and 4 are

set for analog signals

Use the numbered buttons on the control panel under

the LCD to select the analog channel to be adjusted,

then use the UP/DOWN arrows to increase or reduce

the amount of attenuation on that channel. The select-

ed value will be displayed under the bar graph for each

channel (-20 in this example).

NOTE: The level of AES/EBU digital inputs will

be displayed but cannot be adjusted.

In the case where the resulting volume at the receiver

headphones or earphones is deemed insufﬁcient,

the receiver provides makeup gain - see the receiver

Pregain setting on p. 13 in the Limiter setup screen.

NOTE: Do not “drive” this transmitter with levels

as high as you might be tempted to 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

audio signals.

Lock Setup

The front panel buttons can be locked to prevent fur-

ther changes. Use the UP/DOWN arrows to highlight

Lock Setup and press the MENU/SEL button to enter

that screen. Use the UP/DOWN arrows to select either

Locked or Unlocked. Once Locked is selected, no

further changes can be made to the transmitter set-

tings until this same screen is entered and Unlocked

is selected. Note that the lock status is retained during

a power cycle.

NOTE: Features not affected by Lock Setup

include channel monitoring selection and

headphone volume. The Lock status is retained

even if the power to the transmitter is cycled.

Factory Default Reset

To restore factory default settings, use the UP/DOWN

arrow buttons in the main menu to highlight Defaults,

then press the MENU/SEL button. Use the UP/DOWN

arrows to select Yes, then press the MENU/SEL

button. The screen will show Defaults Restored to

indicate that the process is complete.

CAUTION: DO NOT restore factory defaults

while someone is listening to the receiver

with headphones or earbuds - the resulting

change in levels or input type may cause a

VERY LOUD signal to be transmitted to the

receiver.

Factory Default Settings:

• 2 Channel Operation

• RF Frequency 1a (906.624 MHz)

• All Analog Inputs

• Audio Trim at -20 dB

• Unlocked

Rio Rancho, NM

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Lectrosonics Quadra User Manual Page 21

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