User's Manual
ADM Technical Description RFID-LSCAN
File: ADM UserMan.doc Page 9 of 12
Status: Rev1 Last Update: 9/21/2010 3:49:00 PM
it is echoed back on UHF. In this way, the RFID system is able to determine which ADM excited
the tag.
3.1.2 Excitation Distance
Table 1 – Excitation Distance
Value Mode of Operation Conditions
Min Typ. Max
Power saving and
continuous normal-
excitation modes
ADM installed on metallic
surface, tag in front of the unit
(±45
o
angle), all tag orientations,
max. field strength
35cm
(see
Figure 6)
Continuous low-
power excitation
mode
ADM installed on metallic
surface, tag parallel to the long
side of the ADM, min. field
strength
5cm (see
Figure 7)
ADM
Metallic
surface
Excitation
distance
>
35cm
Excitation
distance
<
35cm
Figure 4 – LF Excitation Zone
mail slot
door
5cm
ADM ADM
Figure 5 – Door Slot Installation