Accom ASWR8150 Technical Manual page 156

Engineering Menu
8150 is consistently "behind" or "late" relative to other devices in the
system.
This is a "trial and error" adjustment, but once set, you should not need
to change it for a given edit controller. Type the Time Code Offset value
first, then the Command Delay value, then press the Edit Const
pushknob to enter them. If the Time Code Offset value is 0, it does not
appear in the display after you enter it.
Field Motion
When the 8150 executes a transition or runs a Timeline effect, it calculates
a new mix coefficient every field, referred to as an update. There may be
occasions, however, when you want to update a transition or Timeline
effect only once per frame, or, in 525-line systems, you may want to
update a transition or Timeline effect at the 3:2 field sequence of a
film-to-video transfer. The Field Motion control allows you to specify
how often, and on which field boundary, transitions and Timeline effects
are updated.
Field Ref
Normally, the 8150 executes a cut or other transition on the next field
after it receives the command, which could be Field 1 or Field 2. There
may be times when you want the transition to begin only on Field 1, or
only on Field 2.
5-20
Engineering Setup
Normal – Updates transitions and Timeline effects at every field
boundary, i.e., once per field, for maximum smoothness. This is the
default setting.
F1 – Updates transitions and Timeline effects at every Field 1
boundary, i.e., once per frame.
F2 – Updates transitions and Timeline effects at every Field 2
boundary, i.e., once per frame.
3:2/A, 3:2/B, etc. – Updates transitions and Timeline effects in a
staggered fashion (twice per five field sequence) to match 525-line
film-to-video transfers. The first update occurs after three fields, the
next update occurs two fields later, the next occurs three fields later,
etc. There are five selections because the sequence can potentially start
on any of the five fields in the sequence; you must use trial and error
to determine which of the five is correct. This mode is useful only in
525-line systems.
NOTE: These field dominance settings affect transitions
performed by pressing a source crosspoint directly, or by
pressing CUT, AUTO TRAN, FTB, or by moving the fader
bar. Timeline effects always start and stop running at the
boundary between the end of Field 2 and the beginning of
Field 1, i.e., they always have Field 1 dominance.
8150 Technical Guide
9100-0212-04 - May 2000