User's Manual

Trailblazer Installation and User Manual version 1.02 46
The RSSI command can be used on the base unit. The above figure displays the
results of the command. 3 of the 4 values will always read 00, just ignore these
values. 1 of the 4 numbers should be greater than 7. If the value displayed
contains an alphabetic 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.