User Manual

L-SA4 SHD Antenna User's Guide
18/23 Revision 1.1 August 2010
6 Maintenance
6.1 Servicing the L-SA4 SHD Antenna
CAUTION: The L-SA4 SHD Antenna contains no operator serviceable parts and must only be
serviced by qualified personnel.
No regular servicing is required, except for keeping the unit clean.
It is recommended that the antenna unit be inspected at least once per year by an approved
TAGSYS technical representative.
6.2 Antenna Tuning
When the L-SA4 SHD Antenna is installed underneath the table or desk with the supplied mounting
kit, the reading performances can be significantly reduced. If this happens, it means that the table
or the desk contains metallic parts or other magnetically conductive materials.
In such cases, it is strongly recommended to use a different table made of a different material that
does not present such attenuation, or to change the location of the antenna under the table.
If this is not possible, the antenna may be re-tuned for a limited range with an aim to improve the
reading range.
To re-tune the antenna, you have to use the TAGSYS Antenna Tuning Kit and perform the
procedure described in the TAGSYS Antenna Tuning Kit documentation. The tuning capacitor of
the L-SA4 SHD Antenna is accessible from the bottom side of the antenna and is located under the
TAGSYS logo located at the top left corner of the label which specifies the product type and serial
number (Figure 6).
Two separate tuning capacitors are used to tuned both phase and amplitude of the antenna signal.
Optimum tuning and electrical cable length are necessary to allow multiple CDs/DVDs
operation.
Figure 6: Position of the Tuning Capacitor on L-SA4 SHD Antenna
Tuning Capacitors under Label
When re-tuning the antenna, please turn the tuning capacitor with care.