Avid Technology Pro Tools SYNC HD, Manual

Page: 35 / 166

Chapter 4: Using Pro Tools | SYNC HD 29
Adjusting LTC Output Level/Gain
To adjust LTC output level/gain from Pro Tools:
1
Choose
Setup > Peripherals
and click
Synchro-
nization
.
2
Choose a value from the
LTC Output Level
pop-
up menu.
3
Click OK.
To adjust LTC output level using the front panel
controls:
1
Press Set, and use the Up and Down switches to
display LTC Level (“L7C LEUL”)
2
Press Set.
3
Press the Up or Down switches to scroll through
the available values (in 3 dBu steps).
4
Press Set.
Pilot Tone
SYNC HD can resolve to an external Pilot Tone
signal for clock reference, for synchronizing to (or
transferring audio from) certain types of open-reel
audio tape recorders. Pilot Tone is basically a
60 Hz (NTSC) or 50 Hz (PAL) sine wave tone. Pi-
lot Tone is used on location film shoots to establish
a common sync reference between a film or video
camera with a portable 1/4-inch analog ATR. Pilot
Tone contains no positional information; it pro-
vides only clock reference.
SYNC HD decides whether to use 60 Hz or 50 Hz
as the pilot tone reference frequency according to
the setting of the Video Format. When set to PAL,
the pilot tone frequency is assumed to be 50 Hz.
When set to NTSC, 60 Hz is assumed.
Connect the Pilot Tone reference source to the
SYNC HD Bi-Phase/Tach/GPI/Pilot port.
To resolve SYNC HD to Pilot Tone using Pro Tools:

In the
SYNC Setup
section of the Session Setup
window, select
Pilot Tone
from the
Clock Refer-
ence
pop-up menu.
To resolve SYNC HD to Pilot Tone using the front
panel controls:

Press the Clock Reference switch to select Pilot.
For more information, see “LTC Signals” on
page 58.
For additional Pilot Tone information, see
“Pilot Tone” on page 61.