evertz 8010TM, Instruction Manual

Page: 45 / 98

Model 8010TM SDI Time Code Master Manual
OPERATION
Revision 1.5.1
Page 3-15
3.4.11. Selecting the Lines to Record VITC On
GEN VITC LINE 1 The GEN VITC LINE1 and GEN VITC LINE2 menu items are used to
select the lines on which the VITC will be inserted. The 8010TM keeps
track of the lines for both the 525 and 625 video standards; you will
have to set the line numbers separately for each video standard.
When the
GEN VITC LINE1 sub-menu is first selected, the LINE1
number will be shown. Press the left and right (

,

) keys to change
LINE 1 . Press the down (

) key to select the GEN VITC LINE2 menu
item. Press the left and right (

,

) keys to change LINE 2
The user will have to determine by experience the most suitable lines
for recording VITC according to the following criteria.
In order to protect the VITC reading process against dropouts, the VITC
is usually repeated on 2 non-adjacent lines in the vertical interval of the
video signal, not earlier than line 10 (6 for PAL) or later than line 32.
Adjacent lines and a single line (selected when both lines are the set
the same) are permitted. For certain recordings, the use of some of
these lines may interfere with other signals inserted into the vertical
interval.
Gvitc line 1 = 10
3.4.12. Selecting the Generator Drop Frame Mode (NTSC Only)
In the NTSC (525 line) video standard, the frame rate of approximately 29.97 frames per second
causes an error between real time and 'colour time'. To overcome this problem, the drop frame mode
was created. This mode compensates for the approximate 4 minute per day error by dropping the first
two frame counts (0, 1) at the start of each minute, except minutes 0, 10, 20, 30, 40, and 50. A drop
frame flag bit is set in the code when the drop frame format is used. When the 8010TM is operating in
the NTSC (525 line) video standard, the generator may be programmed to operate in either the drop
frame or non drop frame mode.