Manual

Model 374A User Guide Issue 3, August 2019
Studio Technologies, Inc. Page 21
MODEL 374A
INTERCOM BELTPACK
the channel 1 button’s LED and then
observing the channel 2 button’s LED.
Alternately, the STcontroller software
application can be used to identify the
application firmware version number.
Whatever method you use, ensure that
the desired version is present.
8. Once the update process has been
completed reverse the steps and reat-
tached the cover using the four ma-
chine screws.
Note that upon power being applied to the
Model 374A if a connected USB flash drive
doesn’t have the correct file (M374A.bin)
in the root folder no harm will occur. If the
correct file is not present upon power up
the channel 4 button’s LED will flash on
and off rapidly for a few seconds to indi-
cate this condition and then normal opera-
tion using the unit’s existing application
firmware will begin.
Ultimo Firmware Update
As previously discussed in this guide, the
Model 374A implements Dante connectiv-
ity using the 4-input/4-output Ultimo inte-
grated circuit from Audinate. The Dante
Controller software application can be used
to determine the version of the firmware
(embedded software) that resides in the
Ultimo “chip.” The STcontroller software
application can also be used to identify
the Ultimo’s firmware version. (Use the
Version selection under the Device tab.)
The Ultimo firmware can be updated by
way of the Model 374A’s Ethernet connec-
tion. The latest Ultimo firmware file is avail-
able on the Studio Technologies’ website.
The Dante Firmware Update Manager
(FUM) application program can be used
to install the Ultimo firmware. The Dante
Controller software application includes
an automated method of updating Ultimo
firmware. It offers a much simpler method
of keeping the Ultimo firmware current.
Model 374A versus Model 374
Some users may be interested in the dif-
ferences between the original Model 374
Intercom Beltpack and the newer Model
374A that is described in this guide. A
comparison chart is available on the Stu-
dio Technologies’ website. In addition, the
following text provides a summary of the
changes:
• All configuration selections for the Mod-
el 374A are performed using the STcon-
troller software application. STcontroller
also allows the version numbers of the
Model 374A’s application and Ultimo
firmware (embedded software) to be
remotely identified.
• Support for electret microphones was
added to the Model 374A. This involved
incorporating a 5 volt DC power source
that is associated with the microphone
input pin. It can be enabled or disabled
as required using STcontroller.
• The configurable microphone input gain
settings were modified to be compatible
with the increased output level supplied
by electret microphones.
• The DIP switch assembly and the min-
iature pushbutton switch found on the
Model 374 are not present on the Model
374A. As such the belt clip no longer
needs to be rotated and its mounting
arrangement has been changed.
• The user-accessible sidetone trim
potentiometer found on the Model 374
is not present on the Model 374A. In
the Model 374A the level of the side-
tone function is configured using
STcontroller.