Clock Module Status


The Clock screen provides information on:

Each field of the Clock Module Status screen is described in the table below.

The module image is dynamically updated every 30 seconds, or when you click Refresh (under Connection on the Main Menu).

Field / Section

Description

Inventory Summary

 

Software Revision

Indicates the latest revision level of the module software

Hardware Revision

Indicates the manufacturing revision of the module

Part

Indicates the part number of the specific revision

Module Status

The Status field indicates whether the clock module is activated (enabled) or not activated (disabled).

Clock Status

Indicates whether clock module is selected or in standby mode.

PQL

The  (PQL) is a Synchronization Status Message (SSM) table which allows for translation between DS1 and E1 SSMs.

Mode

This field displays the current clock mode. Possible messages include , , or . This setting is changed in the  screen.

Tau

The Tau value is how long data is averaged (in seconds) to compute the output frequency control loop.

Clock Offset

This is the clock frequency offset. The frequency offset depends on the clock type, and is typically less than 2E-10 for ST2, 1E-6 for

ST3E, and less than 2E-07 for TYPEI clocks.

Sigma

The sigma value indicates the stability of the clock, which should be less than 1E-9.

Alarm Status

Displays only active alarms.

Alarm

This field displays the clock module alarm number. Alarm numbers display in numerical order and correspond to an alarm description. Only active alarms are indicated.

Note:  Alarm #8 is only indicated for the 2E (Rubidium) clock.

Description

This field displays a description of each alarm indicated on the clock module. Only active alarms are indicated. If no alarms are present, the first alarm description will read "None".

Level

This field indicates the severity of an alarm when it is first logged. Alarm level is set in the Alarm Configuration screen. Levels include: , , and .  This is distinct from the Alarm Elevation Time setting, which allows the alarm severity to increase over a specified period of time.

Service Affecting

This field Indicates whether an alarm response message affects service. A response will display either a Yes or No message.

Message

This message further describes the alarm description