Kustom Signals Golden Eagle II Operator's Manual page 57

NOTE: An internal accuracy test is completed at the
end of each timing cycle, before the calculated
target speed is displayed. If an error is found,
"Err" will be displayed in the TARGET window
and no speed readings will be displayed.
7. To clear the last speed, depress the LOCK/REL switch.
The LOCK/ET window will display 0.0 and the unit is
ready for the next timing cycle.
8. If the calculated speed is above 255 mph (410 km/h), the
TARGET window will display "---".
9. To return to radar operation, momentarily depress the
MODE switch. The displays will blank and the Golden
Eagle II will return to the same mode and selected
antenna used before entering the stopwatch mode.
NOTE: During a timing cycle, the TEST switch is
disabled. After the calculated speed is displayed,
the TEST function may be activated. All
displayed speeds and times will be retained and
displayed at the end of the test cycle.
Section 7--System Operation
7.16