Dst Examples - Spectracom PRISMA VelaSync User Manual

3.2 System Time
7.
DST Start Date and DST End Date : This option is provided for locations that do not follow
any of the pre-configured DST rules. Click anywhere in either field to open a calendar,
allowing you to enter any custom day & time rule.
8.
Offset : In seconds. Use this field to manually define your local clock's DST offset e.g.,
3600 seconds for a one hour offset.
9.
DST Reference : When configuring a Local Clock that is synchronized to an input ref-
erence (e.g., IRIG input), VelaSync needs to know the timescale of the input time (Local
Timescale, or UTC Timescale), in order to provide proper internal conversion from one
Timescale to another.
Select Local or UTC , depending on the Timescale of the Input reference this Local Clock is
being used with.
Additional Local Clocks may need to be created if multiple input Timescales are being
submitted.
10.
Click Submit . Your local clock will appear in the Local Clocks panel.
3.2.4.2 DST Examples
The following two examples illustrate the configuration of Daylight Savings Time (DST) for a
Local Clock:
E x a m p l e 1 :
To create a Local Clock to UTC+1 with no DST rule:
1. Navigate to
2. In the
3. From the
4. Confirm that the
5. Review the changes made and click the
The unit will display the status of the change.
E x a m p l e 2 :
To create a Local Clock for a VelaSync installed in the Eastern Time Zone of the US, and desiring the
Local Clock to automatically adjust for DST (using the post 2006 DST rules for the US).
102
allows the DST rules to be edited without the need to perform a soft-
ware upgrade for a new DST rule to be defined. Select this drop-
down and enter the DST parameters for the new rule.
MANAGEMENT > Time Management: Local Clocks > (+): Local Clock
Local Clock Name
field, assign a meaningful name to the new Local Clock.
UTC Offset
pull down menu, select "UTC +01:00".
Use DST Rules
checkbox is not selected.
Submit
button.
CHAPTER •
3
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VelaSync User's Manual Rev. 1