DigiDesign MachineControl Manual page 50

Possible Solutions:
Most controllable transports need to be
placed in a "Remote" or "Ext" mode to allow
them to be slaved to other devices. Verify that
the device is in this mode. Refer to the docu-
mentation that came with your device for more
information on Remote and Local modes.
In the Transport window, check the status of
the "Transport = Pro Tools" or
"Transport = Machine" setting.
Time Code Inaccuracy
Problem:
The time code locations shown in the Selection
and Position Indicator boxes do not match ma-
chine time code.
Possible Solutions:
For best performance with Serial Deck Control
mode, connect the machine to an available se-
rial or COM port (or serial adapter connected to
a USB port) on the host computer. Use the 9-pin
ports on a SYNC peripheral for non-linear video
decks only.
In some cases, the Time Code values reported
by machines are not in sync with the time code
that is played from their time code ports. (One
example of this is when the machine's time code
reader is looking at VITC while Pro Tools is chas-
ing LTC.)
If the values get progressively farther and far-
ther apart, check the frame rate. Make sure you
have set Pro Tools to the same frame rate as the
movie/machine frame rate. Also check the
frame format (drop or non-drop).
If the values differ by a significant margin
(such as an hour or more), the Start Frame num-
ber may be set incorrectly. Open the Session
Setup window and check the Session Start Frame
number.
46 MachineControl Guide
Changing Session Start Time, Dropped
Frames, and Drop Frame Time Code
When you change the session frame rate from a
non-drop to drop rate, or from drop to non-
drop, the session start time and material in the
Timeline may be affected.
Non-drop Changed to Drop: The Session Start
Time is changed to the next possible supported
frame if the current one is not supported in DF.
For example, changing from non-drop to drop
frame in a session that starts at 00:59:00:00 will
change the session's start time to 00:59:00:02
(due to the method by which frames are
dropped in each rate and format).
Every event in the Timeline is moved back two
frames, maintaining each event's relative time
code location (relative to the start of the ses-
sion).
Drop Changed to Non-drop When going from
drop to non-drop, no compensation is applied
to the session start time. This is done because all
frames in drop exist in a non-drop Timeline (a
drop rate Timeline is a subset of its correspond-
ing non-drop rate Timeline). So, when changing
from a drop rate to a non-drop rate, Pro Tools
keeps events at the same location relative to the
start of the session.