Tektronix SPG8000A, User Manual

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148 SPG8000A User Manual
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Disable : Use this setting to disable the Daylight Savings Time schedule
function.
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Once : Use this setting to schedule a specific calendar date and time to
apply or remove the daylight savings time offset. For example, “2016 -03-
06 02:00:00.”
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Recurring
: Use this setti ng to set up relative dates and times to apply and
remove the daylight savings time offset. For example, “1st Sun of Oct
02:00:00.”
CAUTION: When you change the selection mode, any daylight savings time
offset that is currently being applied will be removed and any new daylight
savings time offset that is configured for the new mode will be applied
immediately.
Offset Use this setting to set the daylight savings time offset that will be applied when
either the Once Date/Time event or the Recurring Start event occurs at the user -
scheduled time.
The date and time digits take th e form: HH:MM. When the Recurring Start
function is set, this offset can only be a positive number.
Note : The Offset adjustment allows you to enter a time zone correction of up to
±23:59 hours. However, the ST309 standard only implements codes for time zones
in the range of - 12 to +13 hours. Therefore, when you are using ST309 data as the
Time of Day source, it is recommended that the combined programmed offset f rom
time zone and DST be restricted to the range of -12 to +13 hours.
Once Date/Time
Use this setting to enter the date and time in the form YYYY-MM-DD HH:MM:SS
for when you want to apply daylight savings time a single time. The Selection
Mode must be set to Once for this setting to be active.
Note : In Once Date/Time mode, the pending offset can be positive or negative,
which allows you to add or subtract from the currently applied daylight savings
time offset.
CAUTION : An incoming VITC or LTC reference may have a daylight savings
time shift already applied. To avoid duplicating shifts, disable the daylight
savings time if the time of day reference has daylight savings time applied.
In Once Date/Time mode, daylight savings time offsets can be compounded.
This means that if an offset is currently being applied, and the scheduled time
is then changed to a future date, the newly configured offset will be added to
the already applied offset. For example, if an offset of +1 hour is applied on
March 9 and the scheduled date is then changed to March 16, the resulting
offset after March 16 will be +2 hours.
Recurring Start
The Recurring Start time is the time when the daylight savings time offset will be
added to the time zone off set. Use the drop- down lists to enter the information and
then the time in this format: HH:MM:SS. For example, if you enter Second Sunday
in March 02:00:00 for the Recurring Start time, the daylight savings time offset