Symbol LS 4208 - Aiming

2-6
LS
4208
Product
Reference
Guide
Aiming
On a typical UPC 100% hold the scanner between contact and 19 inches from the symbol (see Decode Zone on page 2-10 ). When
scanning
using
a
single-line
scan
mode,
ensure
the
scan
line
crosses
every
bar
and
space
of
the
symbol.
012345
Figure
2-3.
Acceptable
and
Incorrect
Single-Line
Aiming
When
scanning
using
a
multi-line
scan
mode,
at
least
one
scan
line
must
cross
every
bar
and
space
of
the
symbol.
012345
Figure
2-4.
Acceptable
and
Incorrect
Multi-Line
Aiming
Regardless
of
the
scan
mode,
the
scan
line
is
smaller
when
the
scanner
is
closer
to
the
symbol
and
larger
when
it
is
farther
from
the
symbol.
Scan
symbols
with
smaller
bars
or
elements
(mil
size)
closer
to
the
scanner,
and
those
with
larger
bars
or
elements
(mil
size)
farther
from
the
scanner.
Do not hold the scanner directly over the bar code. Laser light reflecting directly back into the scanner from the bar code is
known
as
specular
reflection.
This
specular
reflection
can
make
decoding
difficult.
Scan
line
lengths
vary
depending
on
the
scan
line
width
selected.
A
full
scan
line
width
is
the
default.
Medium
and
short
scan
line
widths
are
useful
for
scanning
menus
or
pick-lists.
For
more
information
about
scan
line
widths
and
scanning
modes,
see
page
4-7
and
page
4-8
,
respectively.