User Manual

LIBRARY SECURITY PEDESTAL 2
Figure 23: Trimmer Capacitor
Figure 24: Adjusting Trimmer Capacitors
The individual impedance for each antenna should be tuned to be as close as possible to:
Z0 = 50±5 + 0j±5 Ω at 13.560 MHz
Figure 25: Impedance Values using the Tuning Kit
Poor Impedance Good Impedance
Continue the tuning process by checking the antenna isolation (see
section 6.4, Adjusting the
Antenna Isolation
)
6.3.2 Using an Impedance Analyzer
If an impedance analyzer is available, connect each antenna in turn directly to the impedance
analyzer and tune the antennas in the following order: top, center and then bottom.
36/50 Revision 1.0 December 2004