EXFO FTB-860, Руководство пользователя, Страница: 186 / 409

Cable Test Setup and Results
174
FTB-860/880
Global Configuration
Note: The following parameters are only available when the Pass/Fail Verdict is
Enabled .

Prop. Delay Threshold (ns) : Set the threshold value as the
maximum time for a pulse to reach the far end. If the determined
propagation delay is less than or equal to the threshold value, the
test is declared as
PASS
. If the determined propagation delay is
higher than the threshold value, the test is declared FAIL . The
accepted range is
0
to
1000
ns with a default value of
1000
ns for
10 Mbit/s, 556 ns for 100 Mbit/s, and 570 ns for 1Gbit/s.

Delay Skew Threshold (ns)
: Set the threshold value as the
maximum time between the fastest and slowest pairs of a
1000 Base-T signal. If the determined delay skew is less than or
equal to the threshold value, the test is declared as
PASS . If the
determined delay skew is higher than the threshold value, the test
is declared
FAIL . The accepted range is 0 to 120 ns with a default
value of
50
ns.

Length Threshold (m/ft) : Set the threshold value as the maximum
acceptable cable length. If the determined cable length is less than
or equal to the threshold value, the test is declared as
PASS . If the
determined cable length is higher than the threshold value, the test
is declared
FAIL . The accepted range is 0 to 120 m or 0 to 394 feet
with a default value of
100
m (
328
ft).

Restore Threshold Defaults : Restores the default threshold
configuration values for
Prop. Delay Threshold
,
Delay Skew
Threshold , and Length Threshold .