GPS Reference Controller Module


The GPS Reference Controller screen provides information on the controller's status. The fields are described in the table below.

Field / Section

Description

Reference Controller Status

 

Critical Count

Count of active critical alarms

Major Count

Count of active major alarms

Minor Count

Count of active minor alarms

Selected

Indicates which Local Oscillator input is currently selected

Loop Frequency

Same as local oscillator frequency

Delta Frequency

Last applied frequency update to the local oscillator offset

Delta Time

Difference between the phase measurements and the current output from the loop

Loop Status

Indicates status of control loop. Values: " INI" (Loop is in the initialization stage. If in this stage, no other information is presented.), " ACQ" (loop is in acquisition), "LOCK" (loop is in the Locked state), "HALT" (loop updates are halted du to no, or invalid phase measurements), " UHLT" (loop has been halted by user)

Noise

Current measurement noise of the inputs

Offset

Current local oscillator frequency offset

TAU

Indicates current loop time constant, in seconds

Alarm Status

Indicates whether any alarms are currently active

AID

The Access Identifier (AID) identifies the location of a module within the system

Notification Code

Indicates notification codes for alarms. Values: "CR" (critical), " MJ" (major), "MN" (minor), " CL" (cleared), or " IG" (ignored)

Alarm

Indicates the alarm number

Condition Type

Indicates condition type for alarms or events. Values: Module Operations - "ADDED", "REMOVED", or "RESTORED", Controller Alarm Operation - "ALARM" or " PWR", Local Oscillator Reference Updates - " REF", Message Information - "MSG", Operator Responses - " OPER", Equipment Faults - " INTIFCFAIL"

Service Affecting

This field Indicates whether an alarm response message affects service. Values: SA or NSA

Description

Text description of the alarms indicated