6000-100Ch2.fm Rev. D
TimeVault™ User’s Manual
2-19
Power-Up
Chapter 2: Installation and Start-Up
2.3.2
ACTS Mode
Consider the ACTS mode operational once TimeVault has successfully dialed out to the
ACTS service and received time (see Appendix E for details).
2.3.3
NTP Mode
TimeVault’s NTP subsystem can be either a server to downstream clocks in the system, or
a client to another NTP server. After display initialization, TimeVault begins requesting
time through NTP from a user-defined server list. TimeVault polls each server in turn
until it receives a valid NTP response. Consider the NTP client mode operational once
TimeVault receives six valid NTP responses from at least one NTP server from the list.
This may take 8-10 minutes.
If the number of current satellite signals
drops to 1 or 2, the unit uses GPS as refer-
ence source for 10 minutes.
If the number of satellite signals drops to
zero, the unit keeps GPS as the reference
source for 5 minutes while it locks onto
another GPS satellite signal.
Table B.1: Summary of Firmware Version 8 Improvements
Version 7 and earlier
Version 8 and after
TimeVault only enters ACTS mode if GPS is not operational.
TimeVault only enters NTP mode if both GPS and ACTS are not operational.
Summary of Contents for Time Server
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