Accom ASWR8150, Technical Manual

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Auxiliary 3 and 4 Outputs (Optional)
Aux 3, 4
The Aux 3 and 4 Output module, if present, is installed in the lower right
input slot at the rear of the chassis. This module has two additional serial
digital auxiliary bus outputs for external processing feeds or for isolated
feeds. These outputs are always cotimed, and are delayed two lines, 18
lines, or 34 lines from reference, depending on the source selected; they
cannot be delayed by a full frame. Their timing is normally independent
of the Aux 1 and 2 outputs, but you can zero- time them to Aux 1 and 2
(unless Aux 1 and 2 are set to frame delay) by switching the Combiner
setting On in the Engineering Input submenu.
Aux Ref
The Aux Ref feed is a variably-delayed analog composite sync signal
that provides locking reference for video devices (typically DVEs) fed
by auxiliary bus outputs 3 and 4. Aux bus output timing varies according
to the source selected for the output, and this Aux Ref output is always
zero timed to Aux 3 and 4. See Section 6 – System Timing for more
information.
Video Processing Functional Description 8150 Technical Guide
1-22
Introduction
9100-0212-04 - May 2000