Spectracom SecureSync User Reference Manual page 168

3.6 OTHER Setup Pages
Example 3 – NTP Input as Only Available Input ("NTP Stratum 2 Syn-
chronization")
In this use case, the objective is to have NTP provided by another NTP server as the only avail-
able reference input.
Step-by-step procedure:
1.
Move the reference which has "NTP" in the Time column and "NTP" in the 1PPS column to
the top of the table, with a Priority value of 1. Click the Enabled checkbox.
2.
For all other references, uncheck the Enabled checkbox, so that they are all disabled.
Example 4 – Time Set Manually by User. Other References May or May not be
Available
In this use case, the objective is to have a manually set time reference.
Step-by-step procedure:
1.
If necessary (see NOTE above), create a "User."
2.
Move the reference which has "User 0" in the Time column and "User 0" in the 1PPS
column to the top of the table, with a Priority value of 1. Click the Enabled checkbox.
3.
For all other references, uncheck the Enabled checkbox, so that they are all disabled.
If the objective is to use a manually set time as a backup to other references (such as GNSS or
IRIG):
1.
Move the reference which has "User 0" in both the Time column and "User 0" in the 1PPS
column to a place in the table with a lower priority than the references the manually set ref-
erence will be backing up. Click the Enabled checkbox.
2.
With "User" enabled, if no other higher priority references are enabled or available (or if the
higher priority references have since been lost), you can simply set the System time to the
desired value. SecureSync will go into synchronization using this set time.
152
When selecting NTP as an input reference, do not select another reference
Caution:
(such as GNSS, IRIG, etc.) to work with NTP as a reference. NTP should always be
selected as both the Time and1PPS input when it is desired to use NTP as an input
reference.
NOTE – In order for a manually set time to be considered valid and used to syn-
chronize SecureSync, a "User" needs to be enabled in the Reference Priority table.
See"Input Reference Priorities" on page 148 .
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3 SecureSync User Reference Guide Rev. 18