Avid Technology Pro Tools SYNC HD, Manual

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Chapter 8: Wiring Diagrams and Pin Assignments 71
Chapter 8: Wiring Diagrams and Pin
Assignments
LTC Connectors
SYNC HD LTC In and LTC Out connectors are
balanced XLRs with Pin 2 wired “+” or “hot,” Pin
3 wired “–” or “cold,” and Pin 1 wired to ground
(shield). Depending on whether you are connect-
ing a balanced or unbalanced signal to these con-
nectors, different wiring configurations are recom-
mended for optimum signal integrity, especially
for long cable runs.
If you are connecting a balanced signal to the
SYNC HD LTC In or LTC Out connectors:
• Pin 1 and ground should be connected at the in-
put only (not at the output). This will prevent
ground loops between the shield and the Pin 1
conductor.
If you are connecting an unbalanced signal to the
SYNC HD LTC In or LTC Out connectors:
• Connect only Pin 2 to the “+” signal;
• Connect Pin 1 to ground at all inputs and out-
puts.
Wiring diagrams for the SYNC HD LTC In and
LTC Out connectors (balanced signal)
1 2
3
2 1
3
+
–
GND
N.C.
+
–
GND
LTC In
Device
LTC Out Device
Wiring diagrams for the SYNC HD LTC In and
LTC Out connectors (unbalanced signal)
2 1
3
1 2
3
+
GND
N.C.
+
–
GND
LTC In Device
Device
LTC Out