Sony GV-D1000 Operating Instructions (primary manual) Operating Instructions Manual page 218

Identifying the parts and controls
About the time code
A time code is recorded on the tape for easy
scene search. Your VCR records the time code
during recording. Press DISPLAY to check the
time code. Hour, minutes, seconds, and frames
appear on the LCD screen or on the TV screen.
"0:00:00:00" is recorded at the beginning of the
tape. If there is a blank portion on the tape,
however, "0:00:00:00" is recorded after the blank
portion. You cannot rewrite the time code later.
The time code of your VCR is a drop frame
system. It may skip some frames to adjust the
time code.
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