Statistics – EXFO FTB-8500 Series for FTB-500 User Manual
Page 373
Advanced Tab
Ethernet and Fibre Channel Application
359
Service Disruption Time (SDT)
No Defect Time: Available for Defect Mode only. No Defect Time
represents the period without any defects before stopping SDT
measurement. Choices are from 20 to 99990 μs for 10/100/1000Mbps
and 10 to 99000 μs for 10Gbps. The maximum value is adjusted with
respect to the test period (the max No Defect Time is obtained when
the Test Period value is set to its maximum value: 300000000 μs). The
default setting is 20 μs for 10/100/1000Mbps and 10 μs for 10Gbps.
Unit measurement selections are μs, ms, and s.
Test Period: Represents the period of time used to calculate the SDT
measurement. Choices are 20 μs to 5 minutes for 10/100/1000Mbps
and 10000 μs to 5 minutes for 10Gbps. Unit choices are μs, ms, s, and
min. The default setting is 100 ms.
On/Off button: Press On/Off to enable/disable the disruption time
measurements. However, the measurement will only start if the test is
already started, or when the test will be started.
Note: Stopping the SDT test will stop the measurement without clearing the
results. The SDT test is automatically stopped without clearing results when
the test is stopped. However, starting the test again while the STD is still On
(enabled) will reset the results before restarting.
Statistics
Total Disruption Count: Indicates the number of disruptions that
happened since the beginning of the SDT test.
Shortest: Indicates the shortest measured disruption time.
Longest: Indicates the longest measured disruption time.
Last: Indicates the length of the last measured disruption time.
Average: Indicates the average length of all measured disruption
times.
Total: Indicates the total length of all measured disruption times.