Sony DNW-75, Operation Manual

Page: 14 / 120

2-1 Control Panels
Chapter 2
Location and Function of Parts
2-6
Chapter 2 Location and Function of Parts
DF/NDF (drop-frame/non-drop-frame) switch and
indicators
In a 525/60 system, this switch selects the mode of
advancing the time code generator and CTL counter.
DF: Drop-frame mode.
1)
NDF: Non-drop-frame mode.
1)
The indicator corresponding to the selection lights.
Note
When the PRESET/REGEN switch is set to REGEN,
since the time code generator is synchronized to the
playback time code, this switch has no effect.
VITC switch and indicator
To record the time code produced by the internal time
code generator as a VITC, press this switch, lighting
the ON indicator.
When the ON indicator is off, internally generated
time code is not recorded as VITC, but VITC present
in the input video signal is recorded unchanged.
!™
REMOTE buttons and RS-232C indicator
Press one of these buttons to select the device
controlling this unit.
1(9P): This unit is controlled by the device connected
to the REMOTE1-IN(9P) or REMOTE1-OUT(9P)
connector. The button lights.
2(50P): This unit is controlled by the device
connected to the REMOTE PARALLEL I/O(50P)
connector. The button lights.
RS-232C indicator: This indicator lights when this
unit is controlled through the RS-232C connector.
1) Drop-frame/non-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. In
drop-frame mode, except once every 10 minutes, the first
two frames are skipped at the beginning of each minute
to keep the time code values in step with actual elapsed
time.
..........................................................................................................................................................................................................
In non-drop-frame mode, the correction is not carried
out, and there is a discrepancy of about 86 seconds per
day between actual elapsed time and time code values.