User Manual

LIBRARY SECURITY PEDESTAL 2
sine wave carrier generator. Poor isolation is approximately –10 dB or 2 Vpp residual peak-to-peak
voltages.
Optimum isolation is obtained by sliding carefully the top or bottom antenna towards the fixed and
center antenna. When a minimum value is reached, the antenna position can be secured using the
4 screws.
The voltage is measured using an oscilloscope of at least 100-MHz analog bandwidth, 10-ns time
resolution and a 50-Ohm cable terminated at the oscilloscope input.
6.4.1 Using the Antenna Tuning Kit
To access to the antennas remove the top cover of the L-SP2 pedestals (See section 5.4) and
slide out the side panels from the L-SP2 pedestals chassis then set up the components and
connections as shown in Figure 28
Table 5: Oscilloscope Settings
Parameter Value
Channel A
100 mV/Div.
Time Base 20 ns/Div.
Figure 28: Antenna Tuning Isolation
L
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SP2
38/50 Revision 1.0 December 2004