GRASS VALLEY PERFORMER, Инструкция по эксплуатации

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2-74
Section 2 —
Installation
Level Offset
Segments 7 and 8 of switch S1 determine level offset. The
segments operate in binary fashion (7 most significant; 8 least) to
select level offsets from 0 to 3. When set to 0, the Performer level
numbers (V, A1, and A2) are from 1 to 3. When set to 1, the
Performer level numbers are from 2 to 4. When set to 2, the
Performer level numbers are from 3 to 5. When set to 3, the
Performer level numbers are from 4 to 6. Since the protocol
supports only 4 levels, never set level offset to a value greater than
1 unless one of the All Levels protocol variations is selected.
The following table lists S1 switch settings and the resulting level
offset. An “O” indicates an open segment; a “C” indicates a
closed
segment.
If two or more Performers are assigned to the same destination
and level, they cannot be independently controlled but will switch
in tandem. In this instance, only one of the Performers could be in
Master Mode; the others must be in Slave Mode to prevent their
returning a tally response which would result in a bus collision.
Multiple Performers should not be set so that their levels overlap,
e.g., one set to levels 1-3 and another to levels 2-4, unless their
destinations of control are different.
Table 2-19. Performer Level Offset
Level
S1
#7
S1
#8
1-3 O O
2-4 O C
3-5 C O
4-6 C C