Lectrosonics Quadra - Manual (Page 21)

Digital IEM System
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
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