Tektronix TG700, User Manual

Page: 183 / 343

BG7 Black Generator
SOURCE.
Use the left ( ◄ ) or right ( ► ) arrow button to select the timecode
source from the following choices:
Time of Day: Uses the time of day as determined from the GPS antenna.
Program Time: Uses the program time counter as the timecode.
Disable: Disables the timecode function for the BG7 module.
OFFSET.
Use this menu item to set a time offset for the BG7 module outputs
from the timecode input from the GPS7 module. You can enter a time offset of
up to ±23:59:59:29 (maximum frame value depends on the frame rate of the
video signal) of the GPS timecode (hours : minutes : seconds : video frames).
Press the
ENTER button, and then use the left ( ◄ ) or right ( ► ) arrow button to
select a digit in the offset value to change. An underline character appears under
the selected offset digit.
After you select an offset digit, use the up ( ▲ ) or down ( ▼ ) arrow button to
change the value of the digit. Repeat for each digit as required for you offset.
Press the
ENTER to con fi rm the offset change.
30 DROP.
Use the left ( ◄ ) or right ( ► ) arrow button to enable or disable the 30
Drop mode. Use this mode to correct for frame-rate error in NTSC-rate signals or
to allow the timecode to run continuously and drift away from the correct time.
VITC.
Allows inserting the same VITC signal on 1 or 2 lines of the vertical
interval. Select VITC 1 for one line and VITC 2 for the second line. Select the
VITC signal you want to con
fi gure, and then press the ENTER button to enter the
VITC submenu for the selected signal. (See page 3-72.)
TG700 TV Signal Generator Platform User Manual 3–71