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CABLE TESTING
CABLE TESTING GUIDELINES
The CableMaster 800/850 tests coax, network, and telephone cables to detect
possible faults, measures cable lengths, shows wire pairing and examines a cable’s
physical/electrical properties.
Important Notes:
• RJ jacks for data and telephone share internal connections on the
CableMaster 800/850. Connect just one RJ cable at a time
• You cannot connect an RJ and coaxial cable at the same time
• If testing RJ cables, remove any coax cable adapters
SAFETY NOTES
The CableMaster 800/850 is designed for use on cables with voltage below 60V. Do
not plug the device into a source with voltage above 60V. Connecting the device tolive
AC power can damage the unit and pose a safety hazard.
Poorly terminated RJ plugs can damage the jacks on the CableMaster 800/850. Inspect
all RJ plugs before inserting them into the CableMaster 800/850. Make sure you insert
the plug into the appropriate jack of the remote or device. Do not plug a telephone
cable directly into the CableMaster 800/850; use the RJ12 no fault telephone patch
cable.
Cable contacts should be recessed into the plastic housing of the receiving jack. Don’t
plug a 6-position telephone plug into an 8-position data jack on a remote or remote
device.
LENGTH TESTING
CableMaster 800/850 measures cable length and length to faults using Time Domain
Reflectometry (TDR). Velocity of Propagation (VOP) is the TDR measurement of the
speed of the reflected waveforms compared to the speed of light. VoP values can
vary among cable types, lots, and manufacturers. In most cases, these differences are
minor and may be disregarded.
