Symmetricom Time Server User Manual download pdf (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

and 6

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

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 147 148

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