User's Manual

Trailblazer Installation and User Manual version 1.03 45
character (A, B, C, D, E or F), the value is greater than 9. In the above example the
RSSI value is sufficient.
6.4.4 Air Link Quality
The quality of the Air Link can be
interrogated through the
Command Line Interface using the
following command: debug 1
<enter>. This command causes the
Air Link statistics to be printed
every 4 seconds. The statistics can
be stopped by typing, debug 0
<enter>. The processing of the
debug command is illustrated in the
following figure.
With a completely clean link, the
SFD Loss Count and Signal Byte
Error Count should be both zero. A SFD Loss Count greater than (6) could indicate a
low signal strength or external interference.
6.4.5 Installation of Software/Firmware Upgrades
In addition to maintenance using the
GUI software, as a failsafe the
software/firmware for the
Trailblazer systems can be
upgraded in the field through the
serial port using a terminal
emulation program and the
Command Line Interface.
1. Reset the board using the
RESET button near the
rotary channel switch.
2. Stop the program through
the Command Line
Interface. The figure above illustrates this step. When the Boot program starts,
the software version information is displayed. When the prompt “Boot Loader
Ready” appears, type: [stop] and press: <enter>. The Boot program confirms the
stop command by displaying the text “Boot Loader Stopped”. If the text “Boot
Loader Stopped” is not displayed immediately, RESET the unit and try again.
Although timing is not extremely critical, try to type the command in the first
couple of seconds.