Troubleshooting the TCA8000 or TCA8500 Timing Server Using the Event Log

Use Table 33 to identify which actions to perform when an event is reported in the event log.

Table 33: Troubleshooting the TCA8000 or TCA8500 Timing Server Using the Event Log

Event

Type

Description

Action

SYS_CONFIG_CHANGE

Static

One or more parameters were changed in the Config menu.

Verify changes were as expected.

SYS_AUTHENTICATION

Static

The was a failed Login / Password attempt in the unit.

Verify Login name and Password.

GPS_ANTENNA_SHORT

Transient

Antenna connection is shorted between the Cable Conductor Pin and Shield.

For TCA8500 only, check for a cable short on the center and ground shield.

GPS_ANTENNA_OPEN

Transient

Cable Connection has an open in it.

For TCA8500 only, check for a cable open on the center and ground shield.

GPS_NO_USABLE_SATELLITE

Transient

The antenna is unable to acquire any satellites with sufficient signal levels.

For TCA8500 only:

  1. Assure the antenna has a clear view of the sky is not obstructed. For a roof antenna, find location that provides full 360-degree visibility of the horizon.
  2. Validate that there is no source of high frequency interference near the antenna. Set the height of the antenna to be at least three to six feet (1-2 m) from a reflecting surface.

GPS_LEAP_SECOND_PENDING

Transient

GPS notifies of this event approximately 3 months before event.

For TCA8500 only:

  1. This is a normal GPS operation which if occurs will happen either in June 30 or Dec. 31.
  2. Verify event is cleared July 1 and Jan. 1, if does not clear reset unit.

GPS_RECEIVER_INACTIVE

Transient

Internal communication to the GPS Receiver failed to respond.

For TCA8500 only:

  1. Potentially the CPU has lost communication with GPS Receiver.
  2. Reset unit and if it continues to occur RMA unit.

TIMING_OSC_DAC_RANGE

Transient

The Digital-to-Analog Converter (DAC) which controls the voltage adjustment for the Oscillator frequency has exceeded its range of control voltage.

Verify operational temperature is within specification of the unit.

OVEN_TEMP_DEVIATION_HIGH

Transient

Secondary oscillator Oven Temperature increase was faster than the internal oven control could compensate.

This is status only information as the internal oscillator oven temperature control will eventually compensate for this.

OVEN_TEMP_DEVIATION_LOW

Transient

Secondary oscillator Oven Temperature decrease was faster than the internal oven control could compensate.

This is status only information as the internal oscillator oven temperature control will eventually compensate for this.

TE1_LOS

or

TE2_LOS

Note: TE1 denotes first T1/E1 timing input port. TE2 denotes second T1/E1 timing input port.

Transient

T1 or E1 Rx Input has a Loss of Signal (LOS) which is a physical layer alarm.

  1. Check that cable is connected properly
  2. Verify far-end equipment is sending a signal.

TE1_LOF

or

TE2_LOF

Note: TE1 denotes first T1/E1 timing input port. TE2 denotes second T1/E1 timing input port.

Transient

The Rx Input has intermittent or permanent Loss of Frames (LOF) which indicate that the receiver is getting too errors to maintain frame.

  1. Check that cable is connected properly
  2. Verify far-end equipment is sending an error free signal.

TE1_AIS

or

TE2_AIS

Note: TE1 denotes first T1/E1 timing input port. TE2 denotes second T1/E1 timing input port.

Transient

The Rx input has detected Alarm Indication Signal (AIS) alarm. The AIS is an unframed, all-ones signal transmitted on the T1/E1 line

This is being transmitted from the far-end Tx due to its Rx input is not operating correctly. Verify the far-end equipment Rx input has no alarm indications such as LOS or LOF.

TE1_RAI

or

TE2_RAI

Note: TE1 denotes first T1/E1 timing input port. TE2 denotes second T1/E1 timing input port.

Transient

The Remote Alarm Indication (RAI) alarm is sent in the “upstream” direction if the equipment is either receiving an AIS alarm, an LOS condition, or has a LOF condition in the “downstream” direction. This is a repeater alarm to indicate a problem in one or more of the T1/E1 links.

Check connections and alarm state of links which are in the path of the T1/E1 link connected to the this equipment. The condition may be in links which have been multiplexed to a higher rate such as DS3/E3, STS-3/STM-1, and so on.

SYS_DIAG_FAILURE

Transient

The boot-up System Diagnostics had one or more failures.

  1. Turn power off and than back on.
  2. If unit continues to show failure, the unit is defective and RMA unit for repair or replacement.

PTP_SERVER_UNREACHABLE

Transient

There is no master PTP Grand Master available in the network for the configured domain number.

  1. Check domain number should match with the Grand Master domain number.
  2. Check network for support of multicast packets.
  3. Verify Ethernet connection is functioning properly for unit.

PTP_SERVER_CHANGE

Static

A Best Master selection has occurred and the server was changed.

Verify the "other" master had a abnormal event that caused this event.

LOSS_OF_POWER_FEED

Transient

One of the DC inputs has no voltage connected.

  1. Check cables.
  2. If only one power feed being used disable alarm in Admin > Alarms and configure to “NONE”

FREQ_ACQUIRING

Transient

System tries to adjust the local oscillator based on the input source such as GPS, T1, E1, and PTP. If the adjustments are completed, then the system state is changed from acquiring state to locked state.

This is a positive indication of sync source availability.

FREQ_HOLDOVER

Transient

Local Oscillator is in Holdover state. There is no configured servers sync sources available. Only goes to this state after a sync source has been qualified for a period of time and than is not available.

Check sync source quality which was configured in the sync source table.

FREQ_FREERUN

Transient

Local Oscillator is in Freerun state. The unit has not obtained initial lock sync lock state and is operating on the local oscillator.

  1. Check sync source table is configured for at least one source available. If not locked with a period of time (ex. >2 hours) reboot system.
  2. Verify the PTP verify PTP state is slave.
  3. Verify network connections and activity.
  4. This could be caused by unit not initially being locked for a period long enough to generate a holdover value. Verify the unit has been locked for 8 hours or more.

FREQ_REF_INPUT_CHANGE

Static

The reference input being used as a sync source has changed.

Verify one of the reference input such as GPS, external inputs has changed.

FREQ_INPUT_QUALITY_CHANGE

Static

The timing input quality has changed due to lower or higher quality level of the new sync source.

Verify the quality states changes were as expected.

LINK_DOWN

Static

Ethernet connection is not functional.

Verify Ethernet connection, cables and so on.

LINK_UP

Static

Ethernet connection is functional.

This is a positive indication of the Ethernet link status. To suppress go to Configure Admin > Alarm > Severity and set to NONE.