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Chapter 5 Command Reference
Operating Status
5-50 Operating and Programming Guide
Monitoring Status/Alarm Conditions ___________
(continued)
The following describes, for each functional group of operating status shown in
Figure 5-1, each of the operating conditions that is monitored through the
status/alarm system.
Each monitored condition bit is “set” (to one) when the named condition is true
and “cleared” (to zero) when the named condition is false.
Each monitored event bit is set when the named event has occurred and
cleared at powerup and when the user executes a command which reads or
clears the event register.
All of the conditions and events are cleared at powerup and :SYSTem:PRESet.
Alarm Status
The Alarm Status summarizes condition changes from the three major
functional status groups (Questionable, Command Error, and Operation).
• The Questionable Summary condition (bit 3) reflects one or more latched
condition changes in the Questionable status group.
• The Command Error Summary condition (bit 5) reflects one or more
latched condition changes in the Command Error status group.
• The Master Summary condition (bit 6) indicates that there was at least
one reason for generating an Alarm.
• The Operation Summary condition (bit 7) reflects one or more latched
condition changes in the Operation status group.
Operation Status
The Operation Status is comprised of the Operation subgroup (Powerup,
Holdover, and Hardware) summaries, Locked, Position Hold, 1 PPS Reference
Valid, and Log Almost Full status.
• The Powerup Summary condition (bit 0) reflects one or more latched
condition changes in the Powerup status group.
• The Locked condition (bit 1) indicates whether or not the Receiver is
locked to GPS.
• The Holdover Summary condition (bit 2) reflects one or more latched
condition changes in the Holdover status group.
• The Position Hold condition (bit 3) indicates whether the Receiver is in
position hold or survey mode.
• The 1 PPS Reference Valid condition (bit 4) indicates that the GPS 1 PPS
signal is suitable to use as a locking reference.
• The Hardware Summary condition (bit 5) reflects one or more latched
condition changes in the Hardware status group.
• The Log Almost Full condition (bit 6) indicates whether or not the
diagnostic log is approaching the point where new entries will no longer be
logged.