Manual
Table Of Contents
Model 44D User Guide Issue 3, August 2018
Studio Technologies, Inc. Page 23
version number is displayed. This is useful
when working with factory personnel on
application support and troubleshooting
situations. The five LEDs associated with
the line output channel 1 meter are used
to display the major release number with a
range of 1 through 5. The five LEDs asso-
ciated with the line output channel 2 meter
are used to display the release sub-num-
ber which ranges from 1 through 5. Refer
to Figure 8 for a detailed view of the LEDs
and the corresponding application firm-
ware version numbering scheme.
be released to add features or correct
issues. Refer to the Studio Technologies’
website for the latest application firm-
ware file. The unit has the ability to auto-
matically load revised files into the MCU’s
non-volatile memory by way of its USB in-
terface. The Model 44D implements a USB
host function that directly supports con-
nection of a USB flash drive. The Model
44D’s MCU updates using a file named
M44D.bin.
The update process begins by preparing
a USB flash drive. The flash drive doesn’t
have to be empty (blank) but must be in
the personal-computer-standard FAT32
format. The new firmware file will be
saved in the root directory with a name
of M44D.bin. Studio Technologies will
supply the application firmware file inside
a .zip archive file. While the firmware file
inside of the zip file will adhere to the nam-
ing convention required by the Model 44D,
the name of the zip file itself will include
the file’s version number. For example,
a file named M44Dv1r3MCU.zip would
indicate that version 1.3 of the application
firmware (M44D.bin) is contained within
this zip file. Once the desired M44D.bin
file has been stored in the root directory
the flash drive will be ready for use.
To install the application firmware file
follow these steps:
1. Remove power from the Model 44D.
This will entail removing the Ethernet
connection if it is providing PoE power
or removing the external source of
12 volts DC if that is being used.
(Both must be disconnected if for
some reason dual-power has been
implemented.)
Figure 8. Detail of front panel showing the
status LEDs that display the application
firmware version. In this example, the
application firmware version is 1.3.
Major Release Release
Number Sub-Number
O 5 .5 O
O 4 .4 O
O 3 .3
O 2 .2 O
1 .1 O
Application Firmware Update
Procedure
It’s possible that updated versions of the
application firmware (embedded software)
that runs the Model 44D’s microcontroller
(MCU or processor) integrated circuit will