IPC-TM-650 EN 2022 试验方法1.pdf - 第533页

RIE TDR PROCESS Acquire TDR resp onse for one referenc e and line under test Averaging filter of re-sampled TDR waveforms Cubic spline re-sampling of TDR waveforms Perform Derivative of filtered TDR waveforms Determine R…

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TDR Instrument
probe
SIU
Maximum
risetime
DUT
(interconnect)
Time
RIE TDR PROCESS
Acquire TDR response for one reference and line under test
Averaging filter of re-sampled TDR waveforms
Cubic spline re-sampling of TDR waveforms
Perform Derivative of filtered TDR waveforms
Determine RIE loss from reference Sample
Determine RIE loss from test Sample
Determine RIE loss ratio
Voltage
Time
Corresponds to probe launch
T0 T1
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