Tektronix TG700, Руководство пользователя

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GPS7 GPS Synchronization and Timecode Module
Program Time.
As an alternate to the local time of day, a program time counter
can be used as a timecode source for any output. This counter can represent
elapsed time, such as the timecode associated with program content during the
editing process, for example.
Reset Value.
The program time counter will start counting from the speci fi ed
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 prede fi ned value. For example, you can specify the start timecode 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 could
be set at 00:59:55:00 to signal a
fi ve second countdown before the program start,
perhaps to signal a change from color bars to black within the pre-program leader.
GPI Out.
The GPS7 module has two General Purpose Interface (GPI) outputs,
either of which may be con fi gured to begin when the program time matches
a speci fi ed alarm time.
Con fi guring Module
Settings
Understanding the capabilities, operating environment, antenna system, and other
requirements of the GPS7 module can help you decide how to con
fi gure it to
best meet the needs of your speci fi c applications. The GPS7 menu trees and
menu descriptions can help you con fi gure the module. (See page 3-110, GPS7
Module Main Menu .)
TG700 TV Signal Generator Platform User Manual 3–109