IPC-TM-650 EN 2022 试验方法1.pdf - 第513页
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TDR
Select best candidates for line pairs
Low Freq
TDT
disc
Determine
1MHz
r
and Tan
(LCR meter)
Determine
Capacitance/unit
length (LCR meter)
Determine
Resistance/unit
length and
(LCR meter)
Lines
Acquire Impulse response for 2 lines of 2 lengths
Window and filter Impulse response
FFT to get Propagation Constant (Attenuation and Phase)
Use itrative matching of , Att, and low freq
parameters to determine tline modeling parameters
0.3
0.2
0.25
1.5 2.5
Time (nsec)
Voltage (V)
3.52
1=2 cm
1=5 cm
1=8 cm
1=9.8 cm
3 4
0.4
-0.01
0
0.2
0.3
0.1
0 2 4 6 8 10
Measurement
Simulation
0.4
-0.01
0
0.2
0.3
0.1
0 2 4 6 8 10
Measurement
Simulation
Measurement
Simulation
Time (nsec)
Voltage (V)
Time (nsec)
Voltage (V)
Voltage (V)
0.04
-0.01
0.02
0.03
0.01
0 0.2 0.4 0.6 0.8 1
0
Time (nsec)
Measurement
Simulation
Voltage (V)
0.04
-0.01
0.02
0.03
0.01
0 0.2 0.4 0.6 0.8 1
0
Time (nsec)