Studio Technologies 5110 V.3.0 - Manual (Page 10)

Issue 6, October 2012 Model 5110 User Guide
Page 10 Studio Technologies, Inc.
Model 5110
Mic/Line Input Module
chain. Gain should be applied only so that
the signal can reach a level that ensures
a good signal-to-noise ratio is maintained
while minimizing the risk of signal over-
load. The Model 5110’s output signals
will be connected, either directly or via
associated audio transport equipment,
to inputs on an audio console which will
have precise control of the signal levels.
Level Meters
Associated with each mic/line input is a
7-segment LED level meter. These meters
are provided for use during input sensitivity
setting as well as being useful for general
signal monitoring. The labeling of the
meters refers to the level in reference to
the module’s analog reference level. For
the Model 5110S (SMPTE) version the
analog reference level is +4 dBu. For the
Model 5110E (EBU) version the analog
reference level is 0 dBu. So for example, a
signal that is sufficient to just cause the “6”
LED to light will represent an analog output
level that is 6 dB above analog nominal.
This will equate to +10 dBu for the Model
5110S and +6 dBu for the Model 5110E.
This will also represent digital output levels
of –14 dBFS for the Model 5110S and
–12 dBFS for the Model 5110E.
Phantom Power
To support high-performance microphones,
the Model 5110 can provide a source of
+48 volt DC phantom power. A push-
button switch is associated with each
channel and allows phantom power on/off
control. For maximum flexibility phantom
power is available in all four input sensitiv-
ity settings (line, 15, 30, and 45 dB). While
phantom power would not typically be
used in the line setting it’s still available
for special applications.
Pushbutton Switch
“Lock Out”
To prevent unauthorized changes to the
Model 5110’s input sensitivity and phantom
power settings a pushbutton switch “lock-
out” function is provided. Simply press and
hold both +48V (phantom) pushbutton
switches for about two seconds to enable
(or disable) the pushbutton switch lock-out
function. Whenever the pushbutton switch
lock-out function is active the Data/Lock
LED, located on the bottom right side of
the front panel, will light.
Remote Control
The Model 5110 is capable of being
monitored and controlled remotely. When-
ever control data (via the RS-485 link) is
active the Data/Lock LED will “flicker” in
response. And, depending on the priority
level of the data, the input sensitivity and
phantom power on/off status may change,
even if the pushbutton switch lock-out
function is active.
Technical Notes
Software Version Display
After the Model 5110’s power-up sequence
has completed, the unit’s LEDs are used to
automatically display the software version
number. This is useful when working with
factory personnel on application support
and troubleshooting situations. The seven
level meter LEDs associated with chan-
nel 1 audio are used to display the major
release number with a range of 1 through
7. The seven level meter LEDs associated
with channel 2 audio are used to display
the release sub-number which ranges