13
3.
Once
the
auditory
valid
tone
has
sounded,
release
the
trigger.
NOTE:
Always
verify
the
laser
reticle
alignment
and
distance
measurements
are
valid
before
using
the
laser.
These
tests
can
be
found
on
the
HOME
screen
by
pressing
the
Unit
Test
button.
NOTE:
Do
not
follow
the
target
with
the
laser
if
it
moves
out
of
the
view
of
the
HUD
reticle.
This
can
give
improper
results.
The
laser
needs
to
remain
with
a
fixed
aim
and
let
the
target
stay
behind
the
reticle
for
proper
speed
calculations.
The
best
shots
occur
when
aiming
the
reticle
at
reflective
areas
on
the
target
or
lighter
colored
surfaces.
Chrome
plating,
reflective
license
plates
and
headlights
offer
the
best
returns.
NOTE:
If
the
DISPLAY
LOCK
BUTTON
on
the
HOME
screen
has
been
activated,
only
one
target
may
be
captured.
No
further
shots
can
be
fired
and
no
additional
readings
will
be
captured
until
the
lock
is
cleared
by
pressing
the
DISPLAY
LOCK
BUTTON
again,
the
display
lock
times
out
after
14
minutes
or
the
device
is
powered
down.
Once
the
lock
is
released,
the
locked
speed
will
no
longer
be
visible.
6.3
P
OWERING
D
OWN
THE
L
ASER
When
you
are
finished
using
the
laser,
simply
press
and
hold
the
power
button
on
the
display
for
about
three
seconds.
The
unit
will
begin
its
internal
shutdown
sequence
and
turn
off.
6.4
W
HAT
’
S
GOING
ON
BEHIND
THE
SCENES
?
When
the
laser
is
fired,
many
laser
light
pulses
get
emitted
out
of
the
device.
As
they
hit
a
target
and
reflect
back
toward
the
laser
and
are
received,
an
internal
timing
mechanism
keeps
track
of
how
long
they
took
to
make
the
journey.
Knowing
that
the
speed
of
light
is
a
constant
value,
we
can
derive
the
total
distance
traveled
based
on
the
time.
Because
this
distance
includes
the
path
from
laser
to
target
to
laser,
we
simply
divide
the
total
distance
by
two
to
determine
the
target
distance
from
the
laser.
As
additional
pulses
are
transmitted
and
received,
an
internal
calculation
will
determine
both
the
speed
and
direction
the
target
is
moving.
6.5
R
ETRIEVING
S
HOT
D
ATA
(W
HAT
’
S
IN
A
SHOT
?)
Not
every
shot
of
the
laser
will
return
the
same
data.
Depending
on
how
the
laser
is
configured,
different
data
will
be
returned.
In
the
normal
operational
mode
(Figure
6),
each
successful
laser
shot
should
return
the
following
information:
‐
Time
and
date
of
the
shot,
‐
Speed
calculated
for
the
target
(if
a
speed
is
detected),
‐
Units
of
measure
for
the
speed
(mph,
km/h,
etc.),
‐
Direction
the
target
was
moving,
‐
Distance
from
the
laser
at
which
the
target
was
captured,
‐
Corresponding
distance
units
of
measure.
