Grass Valley Indigo AV Mixer v.1.2.2 - Manual (Page 22)

22 INDIGO AV Mixer User Manual
Section 3 — Connections
3.5 Analog Ref Connections
The Analog Ref section provides two Black Burst outputs to sync external
equipment, i.e. the INDIGO AV Mixer can be used as sync generator for
the rest of the production system.
It also provides a Black Burst input with a loop through connector to sync
the INDIGO AV Mixer to an external reference signal.
Use a terminating resistor of 75 Ohm if you connect a signal but do not
loop it through.
Note The Analog Ref connectors cannot be used as inputs or outputs for video
signals.
Figure 7. Analog Ref connections