Manual

Issue 5, December 2018 Model 214 User Guide
Page 6 Studio Technologies, Inc.
other primary uses. Two LEDs display the
on/off status of the main output. A second
pushbutton switch controls the status of
the talkback output channel. This is the
audio signal used to communicate with
producers, directors, spotters, or other
behind-the-scenes production personnel.
A status LED is associated with the talk-
back pushbutton. The pushbutton switches
use gold-plated contacts for reliable long-
term operation and include backlighting
using white LEDs. Three rotary controls al-
low the user to adjust the content and level
of the headphone output.
Microphone Input
The Model 214 provides a high-perfor-
mance microphone preamplifier which
offers low-noise, low-distortion, and high
headroom amplification over a 19 to 64 dB
range. The gain is adjustable in 3-dB steps.
A 2-digit display indicates the amplification
in dB. The microphone input is compat-
ible with balanced dynamic or condenser
microphones. Phantom power is provided
and meets the worldwide P48 standard.
A dual-color LED indicator serves as an
aid for optimizing the setting of the pre-
amplifier’s gain. Microphone signals are
connected to the Model 214 by way of a
standard 3-pin female XLR connector.
Microphone operating parameters can
be set both locally and by way of the
STcontroller remote control software
application. Two pushbutton switches,
accessible on the bottom of the unit, allow
adjustment of the microphone preamplifi-
er’s gain and the on/off status of P48 phan-
tom power. The STcontroller application
allows personal computer users to both
view and change the preamp gain and
P48 on/off status.
Output Channels and their
Operation
By way of the Dante interface, the Model
214 provides a main output channel and a
talkback output channel. The main output
channel is designed to serve as the on-air
,
stadium announcement, or other primary
audio feed. The talkback output channel
is intended to provide production trucks,
control rooms, or support personnel with
talent-originated cue signals.
In addition to the main and talkback output
channels a tally tone/hot mic output channel
is also provided. A configuration choice
allows the output to be selected for either
tally tone or hot mic operation.
When selected for tally tone a 20 kHz sine-
wave signal is present on the designated
Dante transmitter (output) channel whenever
the main output function is active. This tone
can be useful as a “trigger” signal for other
connected devices that need to provide
an indication whenever the Model 214 is
actively providing an “on air” audio signal.
For example, a Studio Technologies’ Model
391 Dante Alerting Unit can respond to the
tally tone signal and provide an “on-air”
indicator using its LED display
. Alternatively,
a Studio Technologies’ Model 44D Interface
unit could provide a contact closure when-
ever the tally tone output is active.
When selected for hot mic signal operation
an un-switched audio output whose source
is the microphone preamplifier is provided
on the Dante transmitter channel. This “al-
ways active” audio signal could be utilized
in an application where the Model 214 is
being used in conjunction with an intercom
system or audio console. Production per-
sonnel may need to monitor the talent audio
signal no matter the status of the main on/off
and talkback functions.