Operator's Manual

Page 21
Signal Attenuation/Reflections
Signal attenuation is the loss of signal strength that occurs
naturally over distances, but which can also be caused by RF
barriers in the signal path.
Examples of such barriers include:
Enclosed locations that have concrete walls, floors, and
ceilings.
Metal surfaces surrounding the antenna or Dura-label.
Water or other fluids surrounding the antenna or Dura-
label.
Almost every object (furniture, partitions, and people) in the
path of a signal causes some degree of attenuation. The effects
can be minimized by careful antenna placement.
The reflection from metal or metallic surfaces behind the Dura-
label can also affect signal attenuation. In some cases, this may
increase the read distance slightly, while inducing intermittent
“dead” spots within the read field that permit little or no
communication between the InstaScan Scanner and Dura-label.
! Dura-labels with similar orientations, placed within two inches of
each other, will have their read distance diminished by about 40%.