Avid Technology Pro Tools SYNC HD, Manual

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Pro Tools | SYNC HD Guide 38
Generator Preset Mode
In this mode, SYNC HD generates timecode inter-
nally from a start time based upon the Generator
Preset Time. you can start, stop, resume, and reset
timecode generation using the SYNC HD front
panel controls.
When generating timecode in Generator Preset
Mode, the SYNC HD timecode generator is re-
solved (locked) to one of three possible sources,
based upon the following criteria:

If the Clock Reference is set to Internal, LTC,
Pilot Tone, Bi-Phase/Tach, Digital (AES/EBU), or
Digital (Word Clock), then the timecode generator
will lock to the selected clock reference.

If the Clock Reference is set to one of the two
video inputs (Video Ref or Video In), then the
timecode generator will reference the Video Ref
input.
Frame Rate Restrictions with Video Reference
In any generator mode, if the Clock Reference is
set to a video input (Video Ref or Video In),
Pro Tools is restricted to generating timecode at
the incoming video frame rate.
With SYNC HD, the Timecode Rate you choose is
dependent on the video format:
• For NTSC, you can choose only 29.97 FPS or
29.97 FPS DROP
• For PAL, you can choose only 25 FPS
In Generator Preset mode, if the Clock Reference
is set to a video input, 24 fps cannot be used as the
SYNC HD timecode format.
Generator Start Time
To set the generator start frame using Pro Tools:

Configure the Session Setup window as appro-
priate for your system and the current project.
See the
Pro Tools Reference Guide for more in-
formation.
To set the generator start frame using the front
panel controls:
1
Press Set, and use the Up and Down switches to
display Set Gen (“SE7 6En”).
2
Press Set. One of the timecode display fields
flashes.
3
Press the Up or Down switches to raise or lower
the currently flashing value.
4
To set a timecode setting and advance to the
next field, press and release Down and Up si-
multaneously.
5
Repeat until you have finished setting the
SYNC HD to the desired generator start time.
6
Press Set. The SYNC HD retains the setting,
even when the unit is powered off and on again,
until you change it.
LTC Generation/Regeneration
Regenerating LTC
SYNC HD will regenerate LTC whenever the ex-
ternal positional reference is moving at normal, 1x
forward speed (±10%).
Make sure LTC is correctly routed as explained in
Chapter 2, “Installation and Configuration”. If you
need to adjust the level of the SYNC HD LTC out-
put signal, see “Adjusting LTC Output
Level/Gain” on page 29. You can also adjust the
SYNC HD LTC servo gain, as described in “Servo
Gain” on page 48.