8 – DTRS synchronization–Machine offset
52
TASCAM DA-98HR
NOTE
NOTE
None of these emulations provides full control of all facili-
ties available on the DA-98HR from the remote control unit.
If the remote control unit does not support the DA-98HR,
select
DA-98
as the emulation. If the controller does
not support the DA-98, select
DA-88
as the emulation.
8.4
Machine offset
It is sometimes necessary to offset a slave unit in the
chain relative to the master unit. This offset can be
set to sub-frame accuracy to a maximum value of
±
02:00:00:00.
NOTE
This offset is unrelated to timecode offset and refers only to
the machine offset when synchronized to other DTRS
units.
8.4.1
Setting machine offset
1
Select menu group 3, move the cursor to
Mcn
Offset
, and press
ENTER
:
2
Select the sub-frame units for the offset (either
samples or 1/100ths of a frame) by moving the
cursor to the bottom rightmost field and using
the
§
and
¶
keys to choose between
sm
(sam-
ples) and
sf
(1/100 frame sub-frames). Note
that between the time and the sub-frame type,
there is an
AUTO OFFSET
setting,
explained in 8.4.3, “Setting machine offset “on
the fly””)
3
Use the
Ó
and
Á
keys to select the field to be
edited (hours, minutes, seconds or frames) and
the
§
and
¶
keys to change the value of that
field.
You can use the function keys as number keys
(4.4, “Using the function keys as number
keys”) to enter the value directly.
You can also change the sign of the offset value
between
+
and
-
by moving the cursor to the
sign and using the
§
and
¶
keys or by using
the
+/–
with the
10KEY
indicator lit.
8.4.2
Cancelling machine offset
To cancel machine offset, simply set the offset value
to
00:00:00:00
.
1
Press and hold down the
§
key and press the
¶
key to reset the value in the
Machine
Offset
menu (see above).
Machine offset is now cancelled.
8.4.3
Setting machine offset “on the
fly”
As well as entering an absolute number, it is also
possible to enter a number “on the fly” as the tapes
are playing.
1
On the slave machine where the offset is to be
set, select menu group 3, move the cursor to
Mcn Offset
, and press
ENTER
.
2
Make sure chase mode (8.2.3, “Master/slave
settings (CHASE mode)”) is off on the slave
unit.
3
Use the
Ó
and
Á
keys to move the cursor to
an “invisible” field to the right of the sub-
frames field
4
Locate the two tapes (master and slave) so that
they have the right offset.
You can play the tapes and pause them after
cueing them up, or carry out the next opera-
tion while either one or both of the tapes is
being played back.
5
Press either the
§
or
¶
key on the slave
machine at the correct offset time to capture
and store the offset.
The captured difference between the master
and slave tapes is be displayed on the bottom
line of the display screen and stored as the
machine offset.
NOTE
S
The value entered in this way can be edited later using the
technique described above.
You cannot determine the offset from an unformatted tape,
or if either tape is currently displaying a negative ABS
value.
8.4.4
An example of setting offsets
A practical example of setting offsets is given here.
The master DA-98HR contains the tape with the dia-
log and reference tracks from the video worktape.
M a c h i n e
O f f s e t
s a m p l e
s u b
f r a m e
A B S
+ 0 0 : 1 2 : 3 8 : 0 0 . 0 0 0 0
s m
M a c h i n e
O f f s e t
s a m p l e
s u b
f r a m e
A B S
A U T O
O F F S E T
