IPC-TM-650 EN 2022 试验方法-- - 第622页
Figure 2 Balanced Attenuation Equipment Setup T racking Generator Spectrum Analyzer Cable Matching T ransformer s 31 m Coaxial Cable Coaxial Cable IPC-TM-650 Number Subject Date Revision Page 3 of 4 Balanced and Unbalanc…
Figure 1 Resistive Matching Network for Unbalanced Cables
For Z System Z Cable:
Z System
R
1
R
2
For Z System Z Cable:
Z System
Z Cable
R
1
R
2
R =
1
Z (Z - Z )
C
C
S
R = Z
2
(Z - Z )
C
S
S
Z
S
R =
1
Z (Z - Z )
C
R = Z
2
(Z - Z )
C
S
Z
S
Z Cable
S
S
C
IPC-TM-650
Number
Subject Date
Revision
Page 2 of 4
I
PC-2-5-30-1
2.5.30
Balanced
and
Unbalanced
Cable
Attenuation
Measurements
12/87
o
--
--
>
n
0
0
0
0
Figure 2 Balanced Attenuation Equipment Setup
Tracking Generator
Spectrum Analyzer
Cable
Matching Transformers
31 m
Coaxial Cable
Coaxial Cable
IPC-TM-650
Number
Subject Date
Revision
Page 3 of 4
Balanced
and
Unbalanced
Cable
Attenuation
Measurements
12/87
2.5.30
I
PC-2-5-30-2
Figure 3 Unbalanced Attenuation Equipment Setup
Tracking Generator
Spectrum Analyzer
Coaxial Cable
Coaxial Cable
R
1
R
2
R
1
R
2
31 m
Cable
Resistor Matching Networks
IPC-TM-650
Number
Subject Date
Revision
Page 4 of 4
Balanced
and
Unbalanced
Cable
Attenuation
Measurements
12/87
I
PC-2-5-30-3