Symmetricom Time Server - Manual (Page 34)

2-20 TimeVault™ User’s Manual 6000-100Ch2.fm Rev. D
Chapter 2: Installation and Start-Up Power-Up
2.3.4 Synchronization Source Operation
During this procedure, TimeVault’s front panel display alternates between an initializing
message and notification of which satellites have been newly acquired. NTP stabilization
usually takes place between acquisition of the 5
th
and 6
th
satellites.
During NTP stabilization, the display reads:
where:
X = the number of the next satellite TimeVault acquires.
Summary of Synchronization Source Operating Criteria
Operational Non-Operational
GPS TimeVault has tracked at least four
satellites during the preceding 15 minutes,
and has received numerically consistent
date/time from them for the preceding
15 minutes TimeVault has either not been able to
track at least four satellites during the
preceding 15 minutes, or has tracked at
least four satellites but has not received
numerically consistent date/time for the
preceding 15 minutes
ACTS TimeVault’s ACTS modem has detected
dial tone when off-hook, has successfully
reached ACTS, and has received time
update TimeVault’s ACTS modem has not
detected dial tone when off-hook, has not
been able to reach ACTS in the preceding
15 minutes, or has reached ACTS but has
not received a time update since the last
ACTS service
NTP TimeVault has received a response from
at least one of the NTP servers on the
user-designated server list, and has
received six valid NTP packet time
responses from it during the preceding
15 minutes TimeVault has not received any NTP data
packet response from any of the NTP
servers of the user-designated server list
for the preceding 15 minutes.
Initializing
TimeVault...
Satellites
Tracked = X