IDEAL INDUSTRIES, Inc. 2-8
Failure Threshold specifies the number of lost packets allowed
before the test is tagged as a “Fail.” The default setting is zero (0)
failures.
Figure 2-10 Ping Setup
In a business network the ping test might be used to check the
connection between an office and a server or networked printer.
In a residential network the ping test can be used to verify
communications with network cameras, computers or home-
automation devices that communicate via IP.
Device Defaults
The device defaults option lets the user specify the default setting
for the cable type and NVP used when creating new jobs. For
example, if Cat 5e UTP is selected, this will be the cable type used
for all tests in a new job unless it is changed to another type. The
NVP (Nominal Velocity of Propagation) is a value that is specified
by cable manufacturers. This specifies the speed of an electrical
signal traveling through a cable and is measured as a percentage
of the speed of light. For example, 0.70 means that the signals are
traveling at 70% of the speed of light. This setting is used to
calculate the correct length measurement with the TDR.
Typical settings for NVP are 0.68 for non-plenum (PVC jacketed)
cable and 0.72-0.75 for plenum rated cable. The correct setting for
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