IPC-TM-650 EN 2022 试验方法1.pdf - 第621页
Figure 1 Resis tive Matching N etwork for Unbalanc ed Cables F or Z System Z Cab le: Z System R 1 R 2 F or Z System Z Cable: Z System Z Cabl e 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 )…
IPC-B-24
IPC-A-600
IPC J-STD-004
IPC-9201
Figure 1 Test Pattern from IPC-B-24
Page 1 of 4
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
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