Specifications

Pro Tools Reference Guide148
Synchronization Device
(Avid HDX, Pro Tools|HD, and HD Native
Systems Only)
The Synchronization Device settings let you con-
figure a synchronization peripheral, such as the
SYNC HD or SYNC I/O.
Enable SYNC Peripheral
When this option is selected, any connected syn-
chronization peripheral is enabled for use with
Pro Tools.
Current Firmware Version
This displays the firmware version for the con-
nected synchronization peripheral, such as a
SYNC HD.
VITC Insertion Enabled
When this option is selected, VITC is inserted into
the outgoing video signal—assuming that a video
signal is present at a synchronization peripheral
video input, and that the synchronization periph-
eral is in a valid mode for inserting VITC.
Pitch Memory Enabled
When this option is selected, the synchronization
peripheral will remain at a pitch (sample rate) that
corresponds to the last known incoming timecode
speed. When deselected, the Synchronization pe-
ripheral reverts to the selected sample rate. If Pitch
Memory is disabled and the selected external clock
reference is not available, then the synchronization
peripheral reverts to the nominal, selected internal
sample rate setting.
Idle MTC Enabled
When this option is selected, MTC is continuously
output. When not enabled, MTC output is muted
when playback is idle.
LTC Output Level
This setting adjusts the analog audio level of the
LTC output, from –24 dBu to +9 dBu.
VITC Read Lines
This setting determines which line pair of incom-
ing video signal is used for the VITC source. When
set to Auto, the synchronization peripheral
searches for the first valid line pair automatically.
Alternatively, this value can be set to specific
VITC line pairs.
VITC Generate Lines
This setting determines the line pair of the outgo-
ing video signal onto which the synchronization
peripheral inserts VITC. Normally, this should be
left at the default (and preferred) setting of 14/16.
Bi-Phase/Tach Wiring
This setting lets you select from the following op-
tions for Bi-Phase or Tach wiring:
• Bi-Phase: FWD = A leads B
• Bi-Phase: FWD = B leads A
• Tach:FWD = B is Low
• Tach: FWD = B is High
Bi-Phase/Tach Pulses/Frame (2–254)
There are several different standards for the num-
ber of pulses-per-frame output by Bi-Phase or
Tach devices. You can set the synchronization pe-
ripheral to operate from 2 to 254 pulses per frame
from Pro Tools. The setting should match the PPF
rate of the Bi-Phase/Tach encoder on the external
device.