Section 3: Operation
NetClock/GTP Instruction Manual
Page 3-11
A status message classified as a Major Alarm is output when the following
alarms and conditions exist:
Frequency Alarm: Measured oscillator frequency error exceeds 1 x 10
-7
.
Time Sync Alarm: The period of time allotted for operation without tracking a
satellite has expired. Factory default period is 2 hours. The
time sync period is programmable from 1 minute to 23 hours:
59 minutes: 59 seconds using the
SYNC
command
described in Section 4,
Software Commands
.
CPU Fault: The CPU is unable to communicate with the GPS receiver.
Test Mode: Unit is placed in Test Mode operation.
Power Failure: The NetClock/GTP has lost power.
A status message classified as a Minor Alarm is output when the following
alarms and conditions exist:
Oscillator Adjust: Warns that oscillator is operating within 10% of the
minimum or maximum control setting. The oscillator
requires manual adjustment.
GPS Lock Alarm: The period of time allotted for operation without
tracking a satellite has expired. Factory default is 15
minutes. The GPS lock period is programmable from
1 minute to 23 hours: 59 minutes: 59 seconds using
the
LOCK
command described in Section 4,
Software
Commands
.
Antenna Problem:
The antenna sense circuitry warns when the antenna
is not connected or a cable short or open is detected.
SmartWatch Invalid:
A failure has been detected with the non-volatile
RAM/Timekeeping integrated circuit. Memory is
retained using lithium batteries having a minimum life
expectancy of ten years. Contact Spectracom for IC
replacement.
Test Mode:
Unit is placed in Test Mode operation.
