Section 4 Operation
84
Self test Operation
• The FF50 has a built-in self test function with which you can check
the operating status of the FF50 automatically. Moreover, a function
of monitoring input NMEA0183 formatted sentences is attached to
the self test function, and you can easily check various data input from
external equipment.
• The self test function has the following four functions.
Internal checking function:
Checks DPU and shows OK or NG as the result.
Input data monitoring function:
Displays various input data including GPS/DGPS sensor and
NMEA0183 sentences on the screen.
Panel checking function:
Displays the status of the panel key that has been pushed.
Display checking function:
Displays test patterns such as crosshatch or color pattern.
• When you push
to turn the power on while pushing
and at the same time, the FF50 enters the
SELFTEST mode and the SELFTEST display appears. Then ROM
and RAM are checked automatically and various data as well as the
result (OK or NG) appear. Push any panel key to change the
corresponding indicator from red to blue on the screen. When all
indicators change to blue, the panel check is completed. After the
panel check is completed, push CLR/OFF to pause the input data
display temporarily. Push CLR/OFF again to resume the display.
When you want to check the NMEA0183 input sentences, stop the
display with this procedure to make checking easier. Push MENU to
switch the display to test pattern. Each time you push MENU, the
test pattern changes as long as the power is on.
•Turn the power off to end the self test.
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