Avid Technology Pro Tools SYNC HD, Manual

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Pro Tools | SYNC HD Guide 36
3
Use the Down and Up switches to scroll param-
eter values:
• “A LEAd b”: Bi-Phase: FWD = A leads B
• “b LEAd A”: Bi-Phase: FWD = B leads A
• “r–n–d LO”: Tach: FWD = B is Low
• “r–n–d HI”: Tach: FWD = B is High
4
Press Set.
Bi-Phase/Tach Pulses-per-frame (PPF)
There are several different standards for the num-
ber of pulses-per-frame output by Bi-Phase or
Tach devices. You can set the SYNC HD to oper-
ate from 2 to 254 pulses per frame from Pro Tools,
from the SYNC HD front panel. The setting should
match the PPF rate of the external device’s Bi-
Phase/Tach encoder.
To set the pulses per frame value for a
Bi-Phase/Tach signal using Pro Tools:
1
Choose
Setup > Peripherals
and click
Synchro-
nization
.
2
In the
Bi-Phase/Tach Pulses/Frame
field, enter
a value from 2 to 254.
3
Click
OK.
To set the pulses per frame value for a
Bi-Phase/Tach signal using the front panel
controls:
1
Press Set, and use the Up and Down switches to
display Bi-Phase/Tach Pulses Per Frame
(“bIPH PPF”).
2
Press Set. The LED Timecode Display displays
the current PPF value.
3
Use the Down and Up switches to scroll through
the parameter values (from 2 to 254 pulses per
frame). Holding either switch will scroll at a
faster speed.
4
Press Set.
Bi-Phase Position Trimming
While using bi-phase as your positional reference,
you can trim the Bi-Phase-to-timecode translation
at any time. Each press of the Up switch will ad-
vance the time address one frame. Each press of
the Down switch will retard the time address by
one frame. Remember how many presses you've
accumulated so that you can go back and trim the
starting address you previously programmed.
Compensating for Timecode
Offsets
You can offset the display of incoming timecode in
the Pro Tools application. This is useful when you
want to adjust the display of timecode to match the
start time of the session (such as with source mate-
rial that starts at a different time), or compensate
for source material that is consistently offset by a
fixed number of frames (such as with some
color–corrected video masters).
Pro Tools provides five different types of External
Timecode Offset settings. These offsets include:
• MMC (MIDI Machine Control)
• 9-Pin (Deck Control)
• Synchronization peripherals such as the
SYNC HD or other peripherals (such as MIDI
interfaces that provide MIDI Timecode).
• Sample Offset
Unique values can be defined for each of these
types of offsets, or you can link MMC, 9-Pin,
Sync, and Satellite to adjust in unison.
Positive and negative offset values can be entered
to offset Pro Tools timecode display later or ear-
lier, respectively.