recommends not to utilize this feature, unless the IRIG format you are using does
not
provide a YEAR field.
Synchronize to Battery Backed Time on Startup
: See "Using Battery Backed Time
on Startup" below.
4.
Click
Submit
at the precise moment desired.
5.
Navigate to
MANAGEMENT > OTHER: Reference Priority
.
6.
In order for the
User
time to be a considered a valid reference, verify that the Reference
Priority table includes an "Enabled"
User [x]
Time,
and
1PPS reference ("
User/User
").
For more information, see "Input Reference Priorities" on page 161 and "The "User
/User" Reference" on page 167.
7.
Move (drag & drop) the
User
time to the top of table, and disable all other references.
8.
Let Holdover expire. (Set it to a very short duration, if desired:
i.
Navigate to
MANGAGEMENT > OTHER: Disciplining
.
ii.
In the
Status
panel, click the GEAR icon.
iii.
In the
Oscillator Settings
window, set the
Holdover Timeout
.)
9.
Check on the
HOME
screen that
User 0
is displayed, with a
green
STATUS. Note that the
Disciplining State
will remain
yellow
, once
Holdover
has expired, since the system time
is not synchronized to a reference.
Note:
Contrary to the
User
reference discussed above, the
Local System
reference
can be used for Time, or 1PPS (but not both). For more information, see
"The
"Local System" Reference" on page 166
.
3.2.1.4
Using Battery Backed Time on Startup
Upon system startup, by default NetClock will not declare synchronization until one of the
external references becomes available and valid.
This functionality can be overridden by enabling the
Synchronize to Battery Backed Time on
Startup
, thus allowing the battery backed time to be used as System Time upon system startup.
The Battery Backed Time is also referred to as the time maintained by the integrated
Real Time
Clock
(
RTC
)
This will result in NetClock providing a System Time before one of the external references
becomes available and valid. This will happen automatically, i.e. without user intervention. As
soon an external reference will become available, its time will take precedence over the battery
backed time: The System Clock will adjust the System Time for any time difference.
152
CHAPTER
3
•
NetClock User Reference Guide
Rev.
16
3.2 System Time
Содержание NetClock 9400 Series
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