Studio Technologies 214A, Руководство пользователя

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Issue Preliminary 1, October 2022 Model 214A User Guide
Page 6 Studio Technologies, Inc.
Model 214A
ANNOUNCER’S CONSOLE
signal could be utilized in an application where the Model
214A is being used in conjunction with an intercom system
or audio console. Production personnel may need to mon-
itor the talent audio signal no matter the status of the main
or talkback functions.
When selected for tally tone operation, a 20 kHz sinewave
signal is present on the Dante aux 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 214A 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 pro-
vide an “on-air” indicator using its LED display. Alternatively,
a Studio Technologies’ Model 544D Interface unit could
provide a contact closure whenever the tally tone output is
active. Main with 18 kHz Tone provides a unique signal on
the aux output. Whenever the Dante main output function
is active the signal on the Dante aux transmitter (output)
channel will be a combination of audio from the microphone
preamplifier and an 18 kHz sine wave tone. This type of
signal can be extremely useful in conjunction with REMI/
At-Home applications.
A large part of the Model 214A’s unique power is the ability
to configure the operation of the main and talkback func -
tions. To meet the needs of the many specific broadcast
and production applications, a variety of pushbutton switch
operating modes are available. The main pushbutton switch
can be selected to operate from among five modes. In the
push to mute mode, the pushbutton performs a momentary
mute of the audio signal associated with the Dante main
transmitter (output) channel. In this way, a “cough” push-
button function is created, something typically required for
television sports broadcasting. In the push to talk mode, the
pushbutton switch provides a momentary active function
for the Dante main transmitter (output) channel. This mode
would be appropriate for an application such as stadium
announcement. The latching (alternate action) configuration
mode allows the pushbutton switch to enable or disable the
audio signal associated with the Dante main transmitter
(output) channel as desired. This is useful in radio broad-
casting, announce-booth, or voice-over applications. The
fourth mode, push to talk/tap to latch, provides a hybrid
function, supporting both push to talk and tap to enable/
tap to disable operation. This operation is similar to that
found in many broadcast intercom system user stations.
The fifth mode, push to mute/tap to latch, is a second hybrid
function, supporting both push to mute and tap to enable/
tap to disable operation.
The pushbutton switch associated with the talkback
function can be configured to operate from among three
modes. One mode supports a push to talk function. This
is typically used for on-air broadcast applications. The
second mode provides a latching function. The third mode
provides a push to talk/tap to latch function, a hybrid mode
that is discussed previously. This mode can be especially
useful when the Model 214A is used in production-support
applications.
Overall Model 214A operation can be configured from
among three modes. One mode is intended for on-air use
while the other two can be useful for production applica-
tions. The Model 214A’s on-air mode is appropriate for on-
air television, radio, and streaming broadcast applications.
When on-air is selected the audio signal associated with
the Dante main transmitter (output) channel will always
mute when the talkback function is active. This prevents
audio that’s intended for production or support personnel
from being sent out the on-air audio path.
For non-on-air applications, the Model 214A can be con-
figured to operate in two production modes. These allow
the Dante main transmitter (output) channel to be used
as a second talkback channel rather than always muting
when the talkback function is active. By using one of these
production modes, the unit can be even more powerful
when used in a live-event application, supporting person-
nel serving in roles such as sports-event spotter, musical
director, or production assistant. In addition to changing
how the Dante main transmitter (output) channel will
respond to talkback pushbutton switch operation, one of
the production modes also supports using the headphone
output for connection with a power amplifier or amplified
loudspeakers. In this mode, the headphone output level will
automatically be reduced (attenuated or dimmed) whenever
the Dante main or talkback transmitter (output) channel
is active. This can enhance intelligibility and help prevent
acoustical feedback from occurring between loudspeakers
and a Model 214A-related microphone.
Headphone Output
The Model 214A provides a number of configuration choic -
es that relate to the unit’s 2-channel (stereo) headphone
output. These choices include the audio sources that are
utilized and how the three rotary level control’s function,
if and when sidetone action will take place, the minimum
headphone output level, and the overall headphone out-
put gain range. Five headphone output audio source and
routing modes are offered. These modes impact how the
three rotary controls adjust the four Dante receiver (input)
channels and the sidetone audio signals.
The first two modes support standard on-air applications
and use Dante audio receiver (input) channels 1 and 2. In
the broadcast world, these two signals are often referred
to as talent cue or IFB audio. In live television applications
they typically originate in production trailers or control