EXFO FTB-800 Series for FTB-1 - Manual (Page 331)

Test Results
NetBlazer 321
Quality Level (SyncE)
Quality Level (SyncE)
The quality level characterizes the clock quality in terms of network
synchronization.
From the Test menu, tap Results, and the Quality Level tab.

Generated QL indicates the Quality Level value that is generated.
Last Change indicates the date and time of the Generated Quality
Level value has changed. For 1GE Electrical interface using Local
Clock set to Slave, the Last Change is not available.

Last QL Received indicates the last Quality Level value 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 Received has
changed.

QL Mismatch Monitoring when selected (default), enables the Quality
Level mismatch monitoring.

Expected QL allows the selection of the Expected Quality Level value.
Available when the QL Mismatch Monitoring check box is selected.
Quality Level
value
SSM Description
QL-STU/UNK 0 Synchronized - Traceability Unknown
QL-PRS 1 Primary Reference Source Traceable (G.811)
QL-PRC 2 Primary Reference Clock Traceable (G.811)
QL-INV3 3 Quality Level Invalid 3
QL-SSU-A/TNC 4 Type I or V slave clock (G.812)
Traceable to Transit Node Clock (G.812 Type V)
QL-INV5 5 Quality Level Invalid 5
QL-INV6 6 Quality Level Invalid 6