User's Manual

29.05.2007 Page 19 of 59
ASR500 Reader Operation
Example: Top of tuning curve outside the right border
In this example the red LED is flashing.
The time of the yellow LED is much longer than the time of the red LED (the red LED might not
be visible), that means the top of the tuning curve is outside of the right border (too much ca-
pacitance).
In this case it is recommended to remove one of the jumpers on ST1 and repeat the auto tuning
procedure. If there are no jumpers to remove on ST1, the inductance of the used antenna is too
low.
Figure 10: Example of top of tuning curve outside the right border