EXFO FTB-8500 Series for FTB-500 - Manual (Page 333)

RFC 2544 Tabs
Ethernet and Fibre Channel Application 319
Latency

Latency Results
Note: The “--” indicates that the result is not available because the test has not
run yet or the measured value is not valid. For FTB-8120NGE and
FTB-8130NGE in Dual Test Set one-way latency measurement mode, Not
Measurable is displayed when the maximum latency is higher than
500 ms.

Frame Size: Indicates the frame sizes used for the test. Up to seven
different frame sizes can be displayed.

TX-to-RX/P1-to-P2/P2-to-P1/Local to Remote/Remote to Local:
Gives the latency for the corresponding direction.
P1-to-P2/P2-to-P1 is only available with FTB-8510B.
Note: Latency measurement values below 15 μs will be shown as “<15 μs” for
Dual Test Set. For all other test cases, values below 0.5 μs will be shown as
“<500 ns”.

Current Trial: Indicates the current trial number.

Unit: Select the throughput result unit. Choices are s, ms, μs, and
ns. The default setting is μs.

Mode: Select the propagation time mode. The default setting is
Store and Forward. Choices are:
Store and Forward (Frame Latency) allows the calculation of the
propagation time of a frame.
Cut Through (Bit Latency) allows the calculation of the
propagation time of a bit.

Displayed Results: Select the displayed result mode: Current,
Minimum, Maximum, or Average. The default setting is Current.