9 - Operations related to timecode
57
TASC AM D A-78H R
9.5.5 External timecode sources
The fol l owing notes shou ld hel p yo u when yo u must
record timecode on the DA-78HR from an external
source (analog or digital).
As mentioned earlier, you should only need to record
timecode from an external source w hen the audio and
timecode tracks have to be transferred together, keep-
ing a strict relationship between the audio and time-
code tracks.
In all other cases, we suggest using either the DA-
78HR’s internal generator or timecode from tape. If
you use these as sources, there will be no jitter prob-
lems, and any problems of synchronization with the
digital audio clock are eliminated
NOTE
When recording timecode from an external digital
source, make sure the digital clock of the DA-78HR
and that of the external source are synchronized. A
warning mess a ge will appear if the tim ecode source
and the DA-78HR are not synchronized, but time-
code can still be recorded. However, the resulting
timecode recording will probably cause synchroniza-
tion problems in the future.
When recording timecode from another DTRS
unit, sync hroniz e the tw o un its us i ng ABS cha s e
(setting the timecode/audio source unit to be a slave
unit). After the two units have been synchronized in
this way, timecode and audio can be transferred
together.
When recording timecode from a digital source
(aud i o or vide o), make sure that the DA-78HR and
the other unit are locked to a common word (audio
recorder) clock reference. After the two machines
have been synchronized in this way, timecode and
audio can be transferred together.
If your analog recorder cannot chase to external time-
code, you must first record the timecode from the
analog recorder on an audio track of the DA-78HR
and then transfer the timecode to the dedicated time-
code track.
Timecode recorded on the audio track in this way is
synchronized to the audio clock, and can subse-
quen t ly be tran s f erred ( through patchin g) to the t ime-
code track.
9.5.6 Recordin g timecode from extern al sources
1Set the time mode to TC (9.1.3, “Selecting TC
or ABS timing”).
2Set the timecode record source to Ext (9.5.1,
“Selecting the timecode source”).
3To record the timecode, press the SUB MENU
key until the display shows TC. REC. EN. 0 (TC
REC EN 0), meaning that timecode recording is
disabled. Use the ▲ and ▼ ke ys to change the
setti ng to 1 (1—enabled).
4Start the external source to check the status of
the external timecode.
If no external timecode has been received since
the DA-78HR has been switched on, the tape
counter will show all hyphens.
If external timecode has been received since
the DA-78HR has been switched on, but is not
currently being received, the tape counter will
flash .
If the external timecode is currently being
received at normal (play) speed, the tape
counter will show the value of the timecode
currently being received. If the external time-
code is being received from a source in fast
wind mode, the tape counter will flash.
If the timecode source is not clock-synchro-
nized with the DA-78HR, a warning will be
shown on the display screen. In this case,
although you can record timecode, it is not rec-
ommended, as this will probably cause prob-
lems later on.
5Stop the external timecode source, and rewind
or reset it to a point prior to where you want
record ing to begi n.
The tape counter will now start to flash.
6Restart the source.
The tape counter will display received time-
code.
7Press and hold down PLAY and press RECORD.
Timecode will now be recorded from the exter-
nal source onto the timecode track.
If the tape counter was flashing when the time-
code track was armed, the tape counter will
now show all hyphens, and nothing will be
reco rded .
9.5.7 Chec king external timecode
You can check received timecode by using the time-
code di splay functio n as descr ibed i n 9. 4.1, “Show -
ing input timecode”.