EXFO FTB/IQS-88000 Series Power Blazer for FTB-2/2Pro/500/IQS-600 - Manual (Page 188)

Test Setup - Test Configurator, Timer, and System
176 FTB/IQS-88000 Series
RFC 2544 - Subtests

Measurement Mode, available with Dual Test Set for rates from 10M
to 10GE, allows the selection of the latency measurement mode:
Round-Trip (default) or One-Way.
Synchronization with an external 1PPS clock is required to perform
One-Way Latency measurement. One-Way Latency is only possible
when both the local and remote 1PPS signal clocks are valid. The
following alarms are available with One-Way Latency measurement
mode.
LOPPS-L and LOPPS-R (Loss Of Pulse Per Second - Local/Remote) are
declared when either no pulse is received or when no pulse is
received within 1 second ± 6.6 μs after the previous pulse. LOPPS-R is
only monitored once the DTS connection is established.

Config. per Frame Size is available when the Copy From Throughput
check box is cleared and allows to set the Max. Rate for each frame
size. For Dual Test Set the Max. Rate is configurable for both local to
remote (L -> R) and remote to local (R -> L) directions. For Dual Port
topology, Max Rate is configurable for P1 to P2 (P1->P2) and P2 to P1
(P2->P1) directions.
All Frames check box when selected (cleared by default) allows to
enter the maximum rate that will be applied to all frame sizes.