1775 IMU Technical Manual
24
Troubleshooting
Figure 23: Recommended Baud Rate/Data Rate Limits
Built-In Test (BIT)
The IMU’s built-in test (BIT) monitors system performance and status
to ensure it is operating within its specifications. BIT test results are
output in five ways:
• Continuous BIT – The Continuous BIT is output as part of the
IMU’s output message during operation (see “Continuous BIT
Status Information” on page 25).
• Startup Extended BIT – When the IMU is powered on, it outputs
the extended BIT status message (see “Extended BIT, 2 Status
Information” on page 26).
• User-requested Extended BIT – When you enter the “?bit”
command in Normal mode, the IMU outputs the extended BIT
status message (see “Extended BIT, 2 Status Information” on
page 26).
• User-requested Extended BIT, 2 – When you enter the “?bit,2”
command in Normal mode, the IMU outputs expanded
diagnostics information, including magnetometer readings.
NOTE: Extended BIT, 2 may impact high-speed outputs while transmitting.
• BIT Log – When BIT information is generated, a log report is
created. This log is accessible by entering the “?logs” command in
Configuration mode.
Baud Rate Maximum Data Rate (Hz)
9600 10
19200 25
38400 50
57600 100
115200 100
460800 500
576000 750
921600 1000
4147200 5000
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