Avid Technology Pro Tools SYNC HD, Manual

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Chapter 2: Installation and Configuration 13
• Red Flashing Slow: SYNC HD is locked, but the
clock reference is more than 4% slower than the
expected rate
• Unlit: SYNC HD is not locked to the chosen
clock reference
Positional Reference
To select a positional reference:

Select a positional reference from the
Positional Reference
pop-up menu, located in
the
SYNC Setup
section.
Positional Reference choices include:
• Auto LTC/VITC
• LTC
• VITC
• Serial Timecode
• Bi-Phase
Sample Rate
The SYNC HD sample rate is determined by the
current Pro Tools session sample rate. In Stand-
alone mode, the SYNC HD sample rate can be se-
lected using the front panel switches. Current sam-
ple rate is indicated by the Sample Rate LEDs.
When used with Pro Tools software and
Pro Tools|HDX or Pro Tools|HD Native hard-
ware, SYNC HD supports all available sample
rates. Setting the session sample rate in the Play-
back Engine or Hardware Setup dialogs also sets
the SYNC HD to that sample rate.
Audio and Video Pull Up and Pull Down
Pro Tools provides up to 4.167% pull up, and 4.0%
pull down. When working with a Movie track con-
taining video, a separate Video Pull-Down menu
becomes available in the Session Setup window,
allowing you to apply standard or non-standard
pull factors to audio and video separately. This lets
Pro Tools synchronize to most supported SMPTE
frame rates and formats.
Timecode Rate
While using Pro Tools, the SYNC HD Timecode
Rate automatically follows the session Timecode
Rate setting. Session Timecode Rate is set in the
Session Setup window.
To set the session Timecode Rate:

Choose a rate from the
Timecode Rate
pop-up
menu in the Session Setup window.
In Standalone mode, the SYNC HD Timecode
Rate can be set from the front panel.
With Pro Tools HD, 4.167% pull up and
4.0% pull down are not available in
176.4 kHz and 192 kHz sessions.