IUH-F117-V1-*
Operation
20
13
-0
4
29
7
Operation
7.1
General
The sections below contain the details on the commands that specifically address
the IUH-F117-V1-* read/write head. The commands are described using the
example of an IDENT
Control
control interface with serial interface. All other
generally applicable commands and error messages or status messages can be
found in the manual for your IDENT
Control
control interface.
7.2
Basic Command Process
Interference Due to Multipath Propagation
The electromagnetic waves radiated by the read/write head do not just follow the
direct route to the tag, but are also reflected off objects in the vicinity, meaning that
multiple partial waves overlap with the waves radiated by the read/write head.
This overlap causes interference (i.e., exaggeration and dampening of the
reception field strength), leading to almost complete degradation. Depending on
the environment, several reflections may occur with differing intensity and
distance. These different reflections lead to a field strength in the measurement
range that is difficult to predict. In the areas of degradation, the prevailing field
strength is weaker than the minimum detection field strength of the tag. As a
result, the tag cannot be activated for communication. Exaggeration of the field
strength may lead to unwanted excessive detection ranges.
1. Measurement Range
2. Degradation
3. Excessive detection ranges
1
2
3
