Sony DVS-7300 User Manual page 121

Digital video switcher system. i/o expansion system
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Bus fixed mode and bus flip-flop mode
The following description of the bus fixed mode and bus flip-flop mode takes
the M/E banks as an example, but the same description also applies to the
PGM/PST bank.
The default operating mode for the switcher is bus flip-flop mode, in which
an M/E background transition always proceeds from background A to
background B, and at the end of the transition the signal selections on the two
background buses flip-flop. This means that except during a transition it is
always background A which feeds the output of each of the mix/effects
banks, and always a background A bus tally indicator which is lit.
The DVS-7300/7350 I/O expansion system can also, however, operate in bus
fixed mode. This treats the two background buses A and B equally: a
transition may go from A to B, or back from B to A, and there is no
automatic flip-flop. In this case the fader lever position also has a fixed
relation to the output: 100% background A when it is at the top, and 100%
background B at the bottom position.
To select the bus flip-flop mode or bus fixed mode, set the BUS TOGGLE
item in a setup menu (page 14-73): "ON" for bus flip-flop mode and "OFF"
for bus fixed mode.
A
BLACK
B
BLACK
Selected signals
A
B
Fader
lever
A
B
Bus flip-flop mode and bus fixed mode
Chapter 4 Basic Operations for Image Creation
"BUS TOGGLE" ON
BLACK
BLACK
"BUS TOGGLE" OFF
BLACK
BLACK
4-37

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