iSXblue/SXBlue II GNSS Series Technical Reference Manual
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Table 1-2 Default Port Settings SXBlue II GNSS
Port
Baud Rate
Data Bits
Parity
Stop Bit
Interface Level
Bluetooth
N/A
8
None
1
Serial Port Profile (SPP)
Serial
19200
8
None
1
RS-232C
USB
19200
8
None
1
Serial Port Emulation
Table 1-3 Default Port Settings iSXBlue II GNSS
Port
Baud Rate
Data Bits
Parity
Stop Bit
Interface Level
Bluetooth
N/A
8
None
1
Serial Port Profile (SPP) &
IAP supported
Serial
57600
8
None
1
RS-232C
USB
57600
8
None
1
Serial Port Emulation
Unless specified differently at time of purchase, the Bluetooth port is fixed at 115200 baud for iSXBlue II
GNSS model and at 230400 baud for SXBlue II GNSS model. When setting up COM port parameters in
software for Bluetooth communication, any baud rate can be specified, but in order to avoid
communication overflow, care must be taken in properly selecting the number of sentences output on a
port at a particular baud rate. The Serial and USB ports can be configured from 2,400 to 230,400 baud but
most UART’s (serial ports) on a PC will allow a maximum of 57,600 baud.
Table 1-4 Default GNSS NMEA Message Output
Port
NMEA Messages
Update
Rate
Bluetooth
GGA, GSA, GST, GSV, VTG, ZDA
1 Hz
Serial
GGA, GSA, GST, GSV, VTG, ZDA
1 Hz
USB
GGA, GSA, GST, GSV, VTG, ZDA
1 Hz
The iSXBlue/SXBlue II GNSS receivers output six (6) standard NMEA messages by default: GGA, GSA,
GST, GSV, VTG and ZDA. All ports are fully independent from one another and can be set to input or
output different messages at different rates (NMEA, Binary, Differential correction). Also, only the
GPGSV sentence, containing GPS satellite information is activated by default. The GLGSV sentence
containing GLONASS satellite information (along with other GLONASS specific NMEA sentences) can
be activated but one must verify that the data collection software used will accept these newer GNSS
sentences in other to avoid malfunctions. Refer to Chapter 4 for more details on GLONASS messages.
Table 1-4 Default Parameters
Max DGPS Age
From 3D to 2D
Elevation Mask
Modes
SBAS Tracking
Decimal
3600 seconds
When PDOP > 10.5
10
°
SBASR, Mixed, Forest, Base,
Fixloc, Glofix, Suretrack
Automatic
7 decimal digits
Because of the unique technology used on-board the iSXBlue/SXBlue II GNSS, the maximum DGPS age
can be set to 3600 seconds. Once the iSXBlue/SXBlue II GNSS receiver loses its differential correction
