iSXblue/SXBlue II GNSS Series Technical Reference Manual
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Note that the Advanced mode activates many binary messages on the communication port (that are turned
off when exiting the software) and requires a connection at a higher baud rate than 19200. A baud rate of
57600 or 115200 is suggested for proper operation.
3.3
Firmware Architecture
The software that runs the iSXBlue/SXBlue II is often referred to as firmware since it operates at a low
level. There are two types of firmware within the iSXBlue/SXBlue III: the on-board Digital Signal
Processor (DSP) and the ARM processor. Each of these types of firmware may be upgraded by the end-
user through the main serial port as new revisions become available.
The ARM processor of the iSXBlue/SXBlue II engine supports two simultaneous versions of firmware
called “Application”. Only one of them is in operation at any given time. These two versions of firmware
may have different functionality and user can switch between applications as needed.
3.3.1
Available Applications
The iSXBlue/SXBlue II currently ships with the MFA (Multi-Function Application) installed as
Application 1 and Auto-Dif as Application 2. The Auto-Dif requires a subscription code for activation.
The default differential input within Application 1 is set to “WAAS” for the iSXBlue/SXBlue II.The
MFA has the particularity of being able to detect and handle all sources of differential correction (SBAS,
RTK, OmniSTAR) and to switch to the best source available without user intervention (refer to the
“$JDIFFX,INCLUDE / EXCLUDE” commands). It also supports the Base station mode.