Sony DVW-250 - Manual (Page 37)

3 Set the REAL TIME record/set switch to REC ON
or OFF.
4 Use the SHIFT button and ADVANCE button to
set the time code value. The range of values is
from 00:00:00:00 to 23:59:59:29 (for NTSC) or
23:59:59:24 (for PAL).
SHIFT button: cycles through the digits, flashing
the digit to be changed.
ADVANCE button: increments the value of the
flashing digit.
5 On an NTSC system, set the DF/NDF switch
appropriately.
DF: Advance the time code in drop frame mode."
NDF: Advance the time code in non-drop frame
mode.
2
'
6 Set the F-RUN/R-RUN switch to F-RUN or R-
RUN.
F-RUN (free-run): The time code advances
continuously, regardless of the operating state
of the unit. When you select this position, the
time code starts advancing immediately.
R-RUN (record-run): The time code advances
only during recording. When you select this
position, the time code starts advancing only
when you start recording.
With the R-RUN selection, the "REC RUN"
setting in the menu (see page 6-
4) determines whether the time code recorded
on the tape is taken from the time code
generator or continues from the value
previously recorded on the tape.
Recording time code and user bits
Recording VITC
Use the following procedure to record VITC, including
the user bits.
Recording VITC
1 Set the VITC switches in the time code setting
controls to select the lines in which the VITC is
inserted.
Insert the tip of a fine screwdriver into the arrow-
shaped slot to turn the switch to the required
hexadecimal digit (see table on next page).
You can select the two lines where the time code is
to be inserted with the A and B switches.
VITC switches
Time codes and battery pack replacement
This unit has an internal battery which provides a
backup power supply to the time code generator. The
time code generator can, therefore continuing running
while you change the battery pack. The backup
battery lasts for about five years.
(Continued)
1) Drop frame mode
In the NTSC system, the actual frame rate is 29.97
frames per second. There is therefore a cumulative
discrepancy between the actual frame rate and the 30
frames per second rate on which time code is based.
Drop frame operation refers to the technique of skipping
frame numbers at appropriate intervals, to keep the time
code values in step with actual elapsed time.
2) Non-drop frame mode
Non-drop frame time code operation means that the
discrepancy between actual elapsed time and 30 frames
per second time code values is not corrected.
Chapter 4 Recording 4-9