Studio Technologies 372A, Руководство пользователя

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Issue 1, April 2019 Model 372A User Guide
Page 16 Studio Technologies, Inc.
MODEL 372A
INTERCOM BELTPACK
Digital filters within the Model 372A’s pro-
cessor integrated circuit help to ensure that
false call detection won’t take place. Digital
filtering is also performed on the microphone
audio output signals as well as the audio
input (Dante receiver) signals before they are
sent to the headphone outputs. This prevents
users with extended high-frequency sensitiv-
ity, such as hosts and guests associated with
dog shows, from receiving undesirable audio
content.
By using a 20 kHz tone for call signaling the
Model 372A is compatible with legacy inter-
com equipment, including the venerable
RTS BP-325 beltpack. When interconnecting
Model 372A and BP-325 units using an ap-
propriate Dante-enabled interface, such as
the Studio Technologies’ Model 45DR In-
tercom Interface, call signaling is fully com-
patible. Compatibility with the Clear-Com®
method of call functionality is also possible
by using the Model 45DC Intercom Interface.
(It converts the DC call signal associated with
pin 3 of a Clear-Com party-line circuit to a
20 kHz tone.) Also, devices such as the
Studio Technologies’ Model 44D Audio Inter-
face will send and receive 20 kHz signals that
are be compatible with the Model 372A. The
Model 44D converts its GPI (general-purpose
input) signals to 20 kHz tones and sums them
with the audio signals which are then trans-
ported “in band” via the Dante audio paths.
How to Identify a Specific
Model 372A
Both the Dante Controller and STcontroller
software applications offer a command that
can be used to help locate a specific Model
372A. When the Identify command is selected
it will send a message to a single Model
372A unit. On that specific unit the pushbut-
ton switch’s orange LED will flash rapidly. In
addition, the SYS and SYNC status LEDs,
located directly below the etherCON RJ45
receptacle on the bottom panel, will slowly
flash green. After a few seconds the LED
identification pattern will cease and normal
Model 372A button LED and Dante status
LED operation will resume.
Mic Kill Support
The Model 372A includes a mic kill function,
allowing the talk button, if it has been placed
in its enabled (on) state, to be remotely
forced to its disabled (off) state. This func-
tion is sometimes referred to as a “talk off”
function. Two actions can enable the mic kill
function. Any time a Model 372A receives a
Dante Identify command it will cause both an
LED pattern to start as well as enabling the
mic kill function. The second “trigger” meth-
od uses the Studio Technologies’ Global Mic
Kill command. This command can be acti-
vated from a menu choice in the STcontroller
software application.
The reason for the Model 372A to offer a
mic kill function is simple. It’s common in
intercom applications for users to enable
(“latch on”) a talk channel and then go “off
headset,” forgetting that they’ve left that talk
channel enabled. While they take a break
or go to lunch, all other users are forced
to listen to that channel which may include
unwanted audio. This makes having the abil-
ity to disable a talk channel very useful. The
Dante Identify command allows a “latched
on” talk channel on a specific Model 372A to
be remotely disabled. Alternately, by using
the Global Mic Kill command a large group
of units can simultaneously have their talk
channels disabled. This would include any
Studio Technologies’ compatible device that
follows this protocol.