23 mm Transponder Reference Manual
25 July 1996
Page 12 of 22
The TIRIS system performance using reader and 23 mm transponder is shown in figures 10, 11
and 12.
Figure 10 shows the system immunity over a spectrum of 6 decades. At the most critical Radio
Short Wave Broadcast frequencies 400 V/m were encountered.
Figure 11 highlights the system performance simulating in-car RF communication conditions.
Figure 12 shows the performance (reading range) under induced broad band noise (white noise)
conditions.
Pulsed FM EMI System Performance
0.001
0.01
0.1
1
10
100
1,000
0.001
0.01
0.1
1
10
100
1,000
10,000
E M I FIELD STRENGTH [VOLTS/m]
FREQUENCY MHz]
LW
SW
MW
FM
VHF / UHF
Malfunction
Function
Function
Figure 10: EMI Performance Test of the TIRIS System.
The graph shows the EM Immunity level in V/m as function of the frequency range from 1 kHz to
1000 MHz. Measurement condition: minimum 90% read probability at maximum read range.
Using a standard TIRIS reader.
