Advanced Time Domain Relfectometry (Tdr) Procedure; Cable Signal Quality Check - IBM 5500 Operational, Installation, And Maintenance Manual

Advanced Time Domain Relfectometry (TDR) Procedure

Cable Signal Quality Check

This section is for qualified maintenance personnel who service the 5500
Control Unit and twinax cabling installations. Refer to the Safety Information
Booklet, S021-0030.
DANGER
To avoid a shock hazard, do not connect or disconnect any cables or
perform installation, maintenance, or reconfiguration of this product during
an electrical storm.
DANGER
To avoid a shock hazard:
The power cord must be connected to a properly wired and earthed
receptacle.
Any equipment to which this product will be attached must also be con-
nected to properly wired receptacles.
DANGER
When possible, use one hand to connect or disconnect signal cables to
prevent a possible shock from touching two surfaces with different
electrical potentials.
The purpose of the cable signal quality check is to determine if and where
there is a failure in the cable, cable connectors, or an attached workstation.
The types of failures can be opens, shorts, poor connections, or impedance
mismatches. You must use an oscilloscope to do this check.
Note: As a customer, you install and maintain your cables. Use the following
precautions:
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