evertz 5010, Instruction Manual

Page: 58 / 108

Model 5010 Time Code Master Manual
Page 4-24
Revision 3.1.1
OPERATING INSTRUCTIONS
To avoid decoding errors, an adequate margin should be allowed between the video head switching
points and the recorded VITC word. Also note that type C VTRs with a sync head have a head
switching point in the middle of the permitted lines. Type C VTRs without a sync head do not
reproduce some of the permitted lines at all; therefore these lines should not be used for recording
VITC. (See your VTR manual for further information).
"
It is recommended that two non-adjacent lines be used; however, adjacent lines and
a single line (selected when both lines are the same) are permitted.
4.5.10. Turning the VITC Generator On
(Models 5010-VITC and 5010-VITC-24 Only)
The
VITC GEN ON/OFF
key is used to turn the VITC keyer on and off. (You must exit the Setup menu
to turn the VITC generator on or off.) When the VITC generator is Off, the program video passes
through the VITC keyer with nothing added. When the VITC generator is On, the VITC will be added to
the program video.
4.5.11. Selecting the Generator Drop Frame Mode (NTSC only)
In NTSC, the video 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 5010 is operating in the NTSC video standard, the
generator may be programmed to operate in either the drop frame or non drop frame mode.
The
DROP FRAME
menu item is used to select the desired drop frame mode for the generator.
Select
NON DROP FRAME
to configure the generator in the non-drop frame or ‘full frame’ mode.
Select
DROP FRAME
to configure the generator in the drop frame mode.
"
When the 5010 is operating in the TIME DATE mode in the NTSC video standard, it
should be set to the Drop Frame mode so that it’s time base is as close as possible to
real time.
DROP FRAME
NON DROP FRAME
DROP FRAME
DROP FRAME
NOT APPLICABLE