User's Manual

SECTION 6—TESTING PROCEDURES
6.9
NOTE: Only the actual Doppler signal is used for
the Patrol Speed. The speedometer input is
used only to steer or guide the DSP to search
for the Patrol Doppler signal in a specific
area, ignoring signals in other areas.
6. During normal operation, at patrol speeds below the
minimum limit of 10 mph, 16 km/h, or when a
“groundspeed” Doppler signal cannot be found, the
PATROL area will display dashes (---), indicating that
the speedometer speed is being received but a patrol
speed cannot be found or displayed. As an example,
when a patrol vehicle is slowing down and the speed
drops below the minimum speed, dashes will be
displayed.