Tasks
CAUTION: Switching between GPS and UTC references while Ignore UTC Corrections
from GPS Reference is enabled may have undesirable effects and should be avoided.
Microsemi recommends disabling and removing all UTC-synchronized Hardware Clock Input
References and NTP associations to prevent this from happening.
Distributing Non-UTC Time
Note: the SyncServer model 350i does not have a GPS receiver.
The SyncServer and NTP are intended to operate with UTC as its standard time scale.
However, if required, the SyncServer can be configured to operate with other time scales.
This topic provides some useful pointers and tips for doing this.
Distributing non-UTC time can be accomplished by several methods:
n Configuring the SyncServer to distribute GPS time.
n Inserting non-UTC Timecode.
n Manually Setting the Time to non-UTC Time
n Synchronizing to non-UTC NTP.
Generally, the user should:
n Be aware that using non-UTC time, or switching between time scales, can have a ser-
ious impact upon systems.
n Perform extensive testing, and take extra measures to protect data and systems, before
implementing non-UTC time.
n Distribute non-UTC NTP only on private or closed networks.
n Avoid distributing non-UTC NTP on open or public networks, or to systems that expect
UTC time.
n Exercise good security practices to prevent this capability from being misused.
n Avoid broadcasting and multicasting non-UTC NTP.
n Use authentication to exclude UTC-based NTP clients.
Distributing GPS Time
See Distributing GPS Time (on page 178).
Inserting non-UTC Timecode
1.
Connect the non-UTC Timecode signal to the IRIG In connector.
2.
On the TIMING - HW Clock page, enable Timecode, disable all of the other references, and
click the APPLY button.
3.
On the NTP - Config page, delete UTC-based NTP associations that have the following
roles: server, peer, broadcastclient, and multicastclient.
4.
Click the RESTART button.
5. When the NTP daemon finishes restarting, the SyncServer will be distributing non-UTC
time.
Manually Setting the Time to non-UTC Time
Page 180..........................................................................997-01520-02 Rev. F1
To Next Page
Loading...
