EXFO FTB-800 Series for FTB-1 - Manual (Page 352)

Test Results
342 FTB-700G/800 Series
Summary (1588 PTP)
Delay Measurement

Sync IPDV meter displays the average of the inter packet delay
variation of consecutive Sync messages in the last second. The value
and the pass/fail verdict is also displayed when enabled.

Delay Req IPDV meter displays the average of the inter packet delay
variation of consecutive Delay Req messages in the last second. The
value and the pass/fail verdict is also displayed when enabled.
Note: When a value is below 1μ second, “< 1μs” is displayed.
Note: When the Pass/Fail verdict is enabled, the green region is delimited from 0
to the IPDV Threshold (refer to PTSF Alarm Timeout/Threshold on page 99)
corresponding to a PASS verdict. The red region beyond the threshold
corresponds to a FAIL verdict. There is neither green nor red region when
the Pass/Fail verdict is disabled.
Quality Level

Last QL Received indicates the last Quality Level received. The
pass/fail verdict is also displayed when both QL Mismatch Monitoring
and Pass/Fail Verdict check boxes are selected.

Last Change indicates the date and time of the Last QL change.
Total PTP Messages
Gives respectively the total count of transmitted (TX) and received (RX)
PTP messages.