Sound Devices 552 - Manual (Page 12)

552 User Guide and Technical Information
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v. 1.4 Features and specifications are subject to change. Visit www.sounddevices.com for the latest documentation.
Front Panel Descriptions
All 552 settings are accessed and controlled from the Front Panel. This allows the unit to be placed in
a production bag while having complete control of the unit.
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1) Input Fader
Primary control for adjusting the level
of an input during operation. Ranges
from Off to +15 dB. Nominal setting is
in the middle (0 dB).
2) Gain (Trim)
Coarse input gain control. Sets the
initial input sensitivity level so that the
Input Fader can be used for fine gain
adjustments. Range is from +22 dB to
+72 dB. See Input Setup and Control.
3) High-Pass Filter Control
Adjusts corner (-3 dB) frequency of
high-pass filter. Full counter-clockwise
position (detented) deactivates the
High-Pass Filter. Range is 80-240 Hz,
12 dB/oct to 6 dB/oct. See Input Setup
and Control.
4) PFL/Input Solo Switch
Pre-Fade Listen. Sends the input’s
pre-fade signal to headphones for solo
monitoring, troubleshooting, and gain
setting. Does not affect Master Output
signal. Slide the switch left to activate,
and again to deactivate. For momen-
tary action, hold the switch left for one
second or longer. The Input Signal Ac-
tivity LED flashes yellow when an in-
put’s PFL is latched on. The Input PFL
Switch is also used to make changes to
several input settings. See Input Setup
and Control.
5) Input Signal LED
Indicates input signal activity. LEDs il-
luminate in various colors and intensi-
ties to show signal level and activity.
Green = signal presence (pre-fader),
yellow = limiter activity (pre- and post-
fade) also flashes when solo is latched
on, red = signal overload/clipping
(pre- and post-fade) also solid when
input is muted. See Metering.
6) Mic/Line LED
Illuminates blue to indicate an input is
set to Line level. To toggle between Mic
and Line settings, hold the input PFL
then slide the Slate Mic/Tone Switch to
the Slate position.
7) PH/Phantom LED
Illuminates blue to indicate an input’s
phantom power is on. To toggle phan-
tom power on and off, hold the selected
input’s PFL switch then slide the Slate
Mic/Tone switch to the Tone position.
Phantom power voltage can be set to
12 or 48 V (48 V is Factory Default).
Phantom voltage is set in the Setup
Menu. The phantom power voltage is
applied across all inputs with the PH
LED illuminated.
8) MS LED
Inputs 1, 2 and 3, 4 can be linked as an
MS pair. When a pair is linked, the MS
and LINK LED illuminate blue. Stereo
linking configurations are selected in
the Setup Menu. See Stereo Linking.