IBM 5500 Operational, Installation, And Maintenance Manual page 130

130
Chapter 6: Twinax Client Cabling Requirements and Problem Solving
Twinaxial
Impedance
Matching
Device
Figure 66: Testing Cable Drop from the Distribution Panel to the Control Unit
a. Make sure that all connectors are correctly labeled so that you can
restore the original configuration.
b. Disconnect the red cable of the Y (or the jumper cable) A that
connects to the cable drop B going to the control unit.
c. Install a test connector on the cable drop going to the control unit at
b.
d. Check for the resistances in Figure 67.
Planning, Installation, and Maintenance Guide
Connection to
Control Unit Port
20 20
Ohms Ohms
R G O B
R G O B
B
R G O B
Distribution Panel
R G O B
A
Red Green
55E1I040