Tektronix TG8000

GPS7 GPS Synchronization and Timecode module
SMPTE309 Data.
When VITC or LT C is selected as the Time of Day source, use
the left (◄)orright(►) arrow button to set how the instrument responds to ST309
data in the timing source. (See page 3-136, Notes about SMPTE309 data usage.)
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 the GPS7 module is set to use
ST309 data a
s the Time of Day source, it is recommended that the combined
programmed offset from time zone and DST be restricted to the range of -12
to +13 hours.
Ignore: If available, the H H:MM:DD;FF data on the incoming LTC/VITC
signal is used, but any YYYY-MM-DD, TZ-Offset and DST enabled/disabled
data is c
ompletely ignored in the Time of Day system. In this mode, the Time
Zone and DST settings in the instrument menu are used to set the time of day
from the input time code and the date is se t from the internal RTC. This is the
mode that should be used if there is no ST309 date data on the input time code.
In this case, the STATUS button display will still show the YYYY-MM-DD,
TZ-Offset and DST settings from the instrument menu.
Use as Input: The ST309 data in the timing source is used and applied to the
master Time system in the instrument. For example, if the data indicates
that
the time zone offset is +8:00 hours, then the master Time is set to the
YYYY-MM-DD HH:MM:SS;FF from the LTC/VITC input, minus the 8 hour
offset. This makes the master Time set to UTC. However, the timecode data
on all outputs is then recalculated based on the time zone offset and DST
offset settings on the instrument. This mode is useful if the incoming time
code data is from a different time zone than the outputs you intend to create.
Use as Input/Output: The ST309 data in the timing source is used and
applied to the master Time as when “Use as Input” is selected. But in this
c
ase, the time zone offset and DST enabled/disabled data from the LTC/VITC
timing source is used to drive the output timecode including the ST309
data. This means that any time zone offset and DST adjustment settings in
the instrument are ignored and that whatever timecode data is coming in
from the LTC/VITC timing source will match the data on the timecode for
the signal outputs.
Internal. When the Time of Day source is set to Internal, use this menu selection
to manually enter the date and time and to activate the time-of-day change. (See
page 3-137, How to set the time-of-day in Internal mode.)
TG8000 Multiformat Test Signal Generator User Manual 3–135