Tektronix SPG8000A, Руководство пользователя

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8 SPG8000A User Manual
o Once : In Once mode, the DST offset is applied only on c e on the date
and time you specify. Set the DST offset to either add or subtract an
hour from the time zone offset, depending on whether DST is starting
or ending in your location.
o
Recurring : In Recurring mode, the DST offset is applied when the
DST START date and time that you specify occurs, and it is removed
when the DST END date and time that you specify occurs. The
recurring DST offset can only be a positive number, such as one hour.
The DST START/END dates are formatted as the DST rules are written
(for example, DST starts on the First Sunday in March at 02:00). For
example, to change to daylight savings time, schedule the system to
add one hour to the time zone offset at 02:00:00 (local time) on March
6, 2011. To return to standard time, schedule the system to remove the
DST offset at 02:00:00 on November 6, 2011. At the scheduled time
and date, the DST change is added to the time zone offset as seen from
the instrument display. You can then program the next scheduled DST
change.
An incoming VITC or LTC reference may have DST shift already applied. To
avoid duplicating DST shifts, disable the DST SCHEDULER if the time of day
reference has DST applied.
Task Scheduler : The task scheduler is responsible for triggering scheduled
events at the appropriate time. This includes DST changes and triggered alarm
outputs.
TC Offset* : Every time code output has an independent offset (hours,
minutes, seconds, frames) that can be added to the value of the selected time
code source.
TC Engine : The time code engine runs at the rate specified through the user
interface and generates the actual time code bit s needed for each output.
LTC : The instrument has four independent linear time code outputs. Each output
can be set independently with regard to time code format, module timing, and
time code delay.
Analog Black : The instrument provides three analog sync outputs. Each output
can be configured as NTSC or PAL Black burst (with optional VITC insertion)
or HD trilevel sync.
HD-SDI : Option SDI provides two independent HD - SDI test signal
generators, for which ancillary time code (ATC) can be added.
Program Time : As an alternate to the local time of day, a program time counter
can be used as a time code source for any output. This counter can represent
elapsed time, such as the time code associated with program content during the
editing process, for example.
Reset Value : The program time counter will start counting from the specified
reset value. Program time can be reset to this value at any time using either the
user interface or a general purpose interface (GPI) input.
Alarm Time : An alarm can be set to generate when the program time counter
matches a predefined value. For example, you can specify the start time code
of your program content at 01:00:00:00. The program time can be initialized to
00:59:00:00 to start a one minute leader before the program. The alarm time