Specifications

Chapter 2: Installation and Configuration 17
Speed Cal The Speed Cal indicator lights to in-
dicate the status of the clock reference:
• Yellow Solid: SYNC HD is locked and that
the clock reference is within 0.025% of the
expected rate
• Yellow Flashing Fast: SYNC HD is locked,
but the clock reference is between 0.025%
and 4% faster than the expected rate
• Yellow Flashing Slow: SYNC HD is locked,
but the clock reference is between 0.025%
and 4% slower than the expected rate
• Red Flashing Fast: SYNC HD is locked, but
the clock reference is more than 4% faster
than the expected rate
• 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 peripheral sample rate is determined
by the current Pro Tools session sample rate. In
Standalone mode, the SYNC peripheral sample
rate can be selected with the SYNC Setup soft-
ware utility (Windows only), or using the front
panel switches. Current sample rate is indicated
by the Sample Rate LEDs.
When used with Pro Tools software and Avid
Pro Tools|HD or HD Native hardware, SYNC pe-
ripherals supports all available sample rates.
Setting the session sample rate in the Playback
Engine or Hardware Setup dialogs also sets the
SYNC peripheral 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 containing 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 for-
mats.
Timecode Rate
While using Pro Tools, the SYNC peripheral
Timecode Rate automatically follows the session
Timecode Rate setting. Session Timecode Rate is
set in the Session Setup window.
With Pro Tools HD, 4.167% pull up and
4.0% pull down are not available in
176.4 kHz and 192 kHz sessions.