Vector Sensor Reference Manual 52
Table 3-6 Beacon Operating Parameters
Default Differential Mode MSK Rate Selection
Automatic Automatic
Table 3-7 Default Differential Mode
Differential Mode
SBAS (WAAS / EGNOS)
3.6 Vector Sensor Architecture
The Vector Sensor is comprised of two main components - hardware and software. This section
provides a brief overview of the hardware and software architecture of the Vector Sensor receiver
in order to provide further insight into the operation of the product.
As the Vector Sensor receiver supports the following services, it provides receiving capability for
each.
• GPS
• SBAS (WAAS and EGNOS)
• Beacon
3.6.1 GPS Hardware
The CSI Wireless GPS engines inside the Vector Sensor provide receiving capability for GPS and
SBAS correction services (including WAAS, and EGNOS).
The GPS engines process GPS and SBAS signals simultaneously, devoting 2 of the primary GPS
engine’s 12 parallel channels to SBAS tracking while using the remaining 10 channels for GPS. This
provides effective tracking of multiple SBAS satellites if available.
3.6.2 GPS Firmware
The software that operates the internal components of the Vector Sensor operates within internal,
low-level devices and is often referred to as firmware.
There are two types of firmware within the Vector Sensor. One type of firmware drivers the on-
board digital signal processors (DSP) and another the ARM processors. Each of these types of
firmware may be upgraded in the field through Port A for the primary GPS receiver as new
revisions become available. The secondary GPS receiver may be upgraded through the Display
Only port.
3.6.3 GPS Applications
The ARM processor of the two GPS engines inside the Vector Sensor each support two
simultaneous versions of firmware. In the case of the Vector Sensor both applications for each
receiver are the same. The primary GPS receiver uses master vector firmware for both
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