Severity Levels

Not Alarmed (NA)

AID Type

Shelf

Subshelf

Date

Month/day/year that the condition was detected

Time

Hour:minute:second that the condition was detected

Probable Cause

HLDOVRSYNC (Holdover synchronization mode)

Effect on Service

Standing Condition (SC)

Alarm Entity Type

COM

Description

manual sync. mode switch

Likely Cause

User selected Fault → Timing/Sync Protection Switch → Clock Mode Switch and the Switch Command Holdover.

Visible Indication

Lighted ABN LED on the SYSCTL faceplate.

Action

Proceed to Procedure 5-97: Clear "manual sync. mode switch" condition.