DigiDesign SYNC HD, Manual

Page: 53 / 103

Chapter 4: Using SYNC HD 47
Bi-Phase/Tach Starting Frame
In order to use the Bi-Phase/Tach signal as a po-
sitional reference, the SYNC HD also needs to
know the time code address for a particular
frame of film. This positional relationship is es-
tablished by parking the film device at a partic-
ular frame and setting the SYNC HD to the
equivalent time code value using the Bi-
Phase/Tach Starting Frame parameter.
To set the Bi-Phase/Tach start frame from
Pro Tools:
1
In Pro Tools, place the playback cursor at the
desired time code location.
2
Choose Setup > Peripherals and click Synchro-
nization.
3
Click the Reset Bi-Phase button.
The Time Code Display on the SYNC HD up-
dates to match the session time code value.
To set the Bi-Phase/Tach start frame from the
front panel:
1
Press Set, and use the Up or Down switches to
display Set Gen (SE7 6En).
2
Press Set to display time code numbers. One of
the time code fields (hours:minutes:sec-
onds:frames) flashes.
3
Press the Up or Down switch to scroll through
the parameter values.
4
To set a time code setting and advance to the
next field, press and release the Down and Up
switches simultaneously.
5
Repeat until you have finished setting the
SYNC HD to the desired generator start time.
6
Press Set.
The LED Time Code Display stops flashing, and
displays the start time.
To set the Bi-Phase/Tach start frame using the
SYNC Setup software utility (Windows only):
1
In the Generator/Bi-Phase Preset section, type
in the time code value of the starting frame, in
hours:minutes:seconds:frames.
2
Click Set.
Bi-Phase/Tach Signal
The Bi-Phase/Tach signal can be set to any of the
following:
Bi-Phase: FWD = A leads B
When the A square
wave is ahead of the B square wave, the direc-
tion of the Bi-Phase signal is understood to be
“Forward.”
FWD = B leads A
When the B square wave is
ahead of the A square wave, the direction of the
Bi-Phase signal is understood to be “Forward.”
Tach: FWD = B is Low
When the B signal is in a
“low” state, the rate and direction (“r–n–d”) of
the Tach signal is understood to be “Forward.”
Tach: FWD = B is High
When the B signal is in a
“high” state, the rate and direction (“r–n–d”) of
the Tach signal is understood to be “Forward.”
To define the direction for a Bi-Phase/Tach input
signal from Pro Tools:
1
Choose Setup > Peripherals and click Syn-
choronization.
2
Choose one of the following settings from the
Bi-Phase/Tach Wiring pop-up menu:
• Bi-Phase: FWD = A leads B
• Bi-Phase: FWD = B leads A
• Tach: FWD = B is Low
• Tach: FWD = B is High
3
Click OK.