Grass Valley 1200 Operation Manual - Manual (Page 81)

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Transition
Transition Controls: Cut, Auto Trans, and Lever Arm
The transition controls give you three ways to do an effects key or
PGM/PST transition: an instantaneous cut, an automatic
transition of a preset duration, or a manual lever arm transition.
■ The [CUT] button causes a full transition to occur instantly. The
button does not light.
■ The [AUTO TRANS] button starts an immediate transition that
extends for the period of time (in video frames) shown in the
Transition rate display. The button lights for the duration of
the transition. To set a new transition rate, press [M/E TRANS]
in the E-MEM section, enter a number using the keypad, and
press [ENTER]. The new rate appears in the Transition rate
display.
Pause feature: An automatic transition in progress pauses if
you press [AUTO TRANS] again and resumes if you press it a
third time.
■ The LEVER ARM gives you direct manual control of the
direction and speed of a transition. When you move the lever
arm off of a limit, the transition begins and exactly tracks the
lever arm motion. A green arrow lights and points in the
direction the lever must travel in order to finish the transition.
You can also use the three transition methods together:
■ If you press [CUT] during an auto transition or when the lever
arm is partly off the limit, the sources involved will instantly
swap places; that is, the source that was transitioning on will
go off and vice versa.
■ You can begin a transition with the lever arm and finish with
[AUTO TRANS]
, or you can begin an automatic transition and
finish with the lever arm.