GHD
TM
& SCOUT
TM
USER’S MANUAL
27
7.10 Vehicle Ignition Interference
The GHD and SCOUT have been designed to operate from the
vehicle’s cigarette lighter receptacle (or from the 6 internal AA
Nickel-Metal-Hydride batteries located in the base of the handle in
the case of the SCOUT). When connected to the cigarette lighter
receptacle it should be noted that some vehicles exhibit excessive
alternator noise at the lighter receptacle. In these rare cases, the radar
can exhibit erratic readings, especially when the vehicle’s electrical
system is operated under heavy load. Wiring an accessory outlet
directly to the battery minimizes the effect. If you are operating off
of the gun’s internal batteries then vehicle ignition interference will
not be a factor.
If you suspect your vehicle’s electrical system, contact Decatur
Electronics’ Customer Service Department for more information.
8. Testing the Device
8.1 Operator-Requested Self Test
Pressing the
TEST
button initiates a comprehensive system self
test, which checks the numeric displays and runs a target speed
simulation. The self test checks:
Display Test–The display test verifies that the digit segments and
status icons are working correctly and that none of the pixels in the
number segments are damaged.
Circuitry Test–The system checks the internal circuitry. If the unit
passes all internal checks, the message
PASS
will be displayed. If
an error should occur then
FAIL
will appear in the display window.
Speed Simulation Test–The radar verifies speed accuracy using
synthesized Doppler frequencies corresponding to a series of four
simulated speeds:
15, 30, 45,
and
60
(when in mph mode) and
25,
50, 75,
and
100
(when in km/h mode).
