HID Global Corporation VERICLASS Manuale Utente
veriCLASS Hardware Specification VP3500 Reader Board, 3500-906
5.2
Modulation Waveforms
The measurements were taken for a concentric arrangement between reference PICC and test PCD
in four different distances.
in four different distances.
The results may vary slightly between different reader boards due to production tolerances.
Note: Metal or ferrite material in proximity of the antenna will lead to detuning effects, which may
cause major changes in the RF properties.
cause major changes in the RF properties.
5.2.1
ISO/IEC 14443 Type A Waveforms
The waveforms were measured in accordance to ISO/IEC10373-6 (16.5MHz resonance frequency
of reference PICC).
of reference PICC).
Table 7: ISO/IEC 14443 Type A Waveforms
Distance 0mm @ 106kbps
Distance 7.5mm @ 106kbps
t1 [ns]
2914
t1 [ns]
2913
t2 [ns]
2070
t2 [ns]
2057
t3 [ns]
438
t3 [ns]
436
t4 [ns]
236
t4 [ns]
239
Os [%]
0.35
Os [%]
0.48
Distance 12mm @ 106kbps
Distance 20mm @ 106kbps
t1 [ns]
2912
t1 [ns]
2915
t2 [ns]
2018
t2 [ns]
1977
t3 [ns]
442
t3 [ns]
459
t4 [ns]
244
t4 [ns]
248
Os [%]
0.36
Os [%]
0.64
March 2011
Page 17 of 28
© 2011 HID Global Corporation. All rights reserved.