User Manual

Warranty Conditions
December 2007 Revision 3.5 47/48
Appendix A: Pattern Examples
Enabling one Antenna after Another
This is the most common example of a tag-reading pattern and requires the use of two patterns.
The first one enables only Antenna 1, while the second enables only Antenna 2.
In Pattern 1, Antenna 1 is enabled and then the detected tags are read. Afterwards in Pattern 2,
Antenna 1 is disabled, Antenna 2 is enabled and then the detected tags are read.
Channel 1 2 Phase Shift
Pattern 1 Enabled Disabled Disabled
Pattern 2 Disabled Enabled Disabled
The advantage of this configuration is that the two antennas are not enabled at the same time,
reducing interference.
Enabling both Antennas Simultaneously
This configuration is implemented with only one pattern that enables Antennas 1 and 2 at the same
time. This configuration is best used for detecting smart labels in 3-dimensional rotating field
applications.
In this case, a phase shift should be applied to one of the antennas in order to create a 3-D RF
field.
Both Antennas 1 and 2 are enabled and the tags detected by Antenna 1 are read and then the
tags detected by Antenna 2 are read. (Only one channel can be read at a single time.)
Channel 1 2 Phase Shift
Pattern 1 Enabled Enabled Enabled
Enabling each Antenna Separately and then both at once
Depending on the application requirements, in this configuration each antenna can be enabled
separately and then both at once.
In order to implement this configuration, three patterns are necessary. The first one enables only
Antenna 1, the second enables only Antenna 2 and the third enables both Antennas 1 and 2.
Channel 1 2 Phase Shift
Pattern 1 Enabled Disabled Disabled
Pattern 2 Disabled Enabled Disabled
Pattern 3 Enabled Enabled Enabled