User`s guide

FIREWIRE SMPTE CONSOLE
80
address. For further details on the hardware
connections involved, see “Syncing to SMPTE time
code” on page 32.
Resolving to video
To resolve the Traveler to video, you need a
synchronizer such as a MIDI Timepiece AV or a
Digital Timepiece to feed word clock to the
Traveler. In this scenario, choose the Word C l o c k In
clock source setting in The MOTU FireWire Audio
Console. The Traveler uses word clock for the time
base and your host application resolves to MIDI
Time Code generated from the synchronizer. For
details, see “Syncing to video and/or SMPTE time
code using a synchronizer” on page 33.
FRAME RATE
This setting should be made to match the SMPTE
time code frame rate of the time code that the
system will be receiving. The Traveler can auto-
detect and switch to the incoming frame rate,
except that it cannot distinguish between 30 fps
and 29.97 fps time code. So if you are working with
either of these rates, make sure you choose the
correct rate from this menu.
READER SECTION
The Reader section (on the left-hand side of the
window in Figure 11-1) provides settings for
synchronizing the Traveler to SMPTE time code.
Status lights
The four status lights (Tach, Clock, Address and
Freewheel) give you feedback as follows.
Tac h
The Tach light blinks once per second when the
Traveler ha s successfully achieved lockup to
SMPTE time code and SMPTE frame locations are
being read.
Clock
The Clock light glows continuously when the
Traveler ha s successfully achieved lockup to an
external time base, such as SMPTE time code or
word clock.
Address
The Address light glows continuously when the
Traveler ha s successfully achieved lockup to
SMPTE time code.
Freewheel
The Freewheel light illuminates when the Traveler
is freewheeling address (time code), clock or both.
For details about Freewheeling, see “Freewheel
Address” and “Freewheel clock” below.
SMPTE source
Choose the analog input to which the SMPTE time
code source is connected. This is the input that the
Tr av el e r “ l is te ns” to for time code.
Freewheel Address
Freewheeling occurs when there is a glitch or
drop-out in the incoming time code for some
reason. The Traveler can freewheel past the drop-
out and then resume lockup again as soon as it
receives readable time code. Choose the amount of
time you would like the Traveler to freewheel
before it gives up and stops altogether.
The Traveler cannot freewheel address without
clock. Therefore, the Freewheel Address setting will
always be lower than or equal to the Freewheel
Clock setting, and both menus will update as
needed, depending on what you choose.
Keep in mind that freewheeling causes the system
to keep going for as long as the duration you choose
from this menu, even when you stop time code
intentionally. Therefore, if you are starting and
stopping time code frequently (such as from the
transports of a video deck), shorter freewheel
times are better. On the other hand, if you are
!Traveler Manual/Win Page 80 Monday, November 29, 2004 3:50 PM