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6802800U74-AN
Chapter 13: MTS Troubleshooting
Use the status sc command. Observe the Overall Status field of the resulting output and proceed as
follows:
•
If Overall Status = Active – <state> / <reason>, this is an indication that the Site Controller is
currently active, together with the site reference state and the reason for that state. These states
and reasons are explained in
107: Site Reference Reasons on page
•
If Overall Status = SC is going active – waiting for BRs, the Site Controller may be unable to
communicate with the BRs. Waiting for the Site Controller configuration file load, the configuration
file may be corrupt or is not present. See
SC Config File on page
Table 106: Site Reference States – status sc
Site Reference State
UNKNOWN
ENABLED SYNC
DISABLED
FREE-RUN SYNC
NON-SYNC
NON-SYNC ADJ-RE-
QUIRED
ENABLED NON-SYNC
Table 107: Site Reference Reasons
Site Reference Reason
NO REASON
1PPS LOST
FREE RUN TIMER EXPIRED
UHSO AGEING
SITE REFERENCE ALARM
FREQUENCY CALIBRATION
TIMER EXPIRED
GPS OK
GPS AND NTS LOST
350
Table 106: Site Reference States – status sc on page 350
350.
LED Fault Indications on page 345
351.
Explanation
The site reference is initializing - this is a transient state that may
persist for a few minutes at start-up.
The site reference is fully trained to GPS - This is the highest level
of functionality.
The site reference is not working.
This is the first level of fallback - The site reference continues to
provide its highest level of service in this state until the free run tim-
er expires.
This is the second-level fallback - The site reference is providing
service however any feature that needs sites to be synchronized
may be impaired.
The site has been operating in its 2nd level fallback mode for too
long (> 350 days) and should be disabled by the operator.
The site has been configured to operate in its second-level fallback
mode (FNC) to enable start-up without GPS.
Explanation
Normal operation - no explanation needed
The 1PPS timing source from the GPS is not present.
The SR has been free running for longer than the time con-
figured during installation.
The UHSO (Ultra High Stability Oscillator) is approaching
end of life and requires replacing soon.
An unspecified site reference condition has occurred.
The SR has been free running without GPS for over 350
days - GPS calibration is required to ensure RF frequency
stability compliance.
The GPS receiver is supplying a valid 1PPS timing source.
GPS, peer SC reference (second SC in the MTS with two
SC), and NTS connection is lost. It means that at least NTS
must be made available otherwise you need an adjustment
and
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Troubleshooting
