Specifications

132 LightJockey Help file - (C) Martin Professional 2010
LightJockey Help
Negative amplitude - scaling of the negative (below the 0-line) part of the macro.
Both amplitudes can be set at a value between -255 and 255; assigning negative value to any of the
two the amplitudes has the effect of 'mirroring' the relevant part across the 0-value line.
Cycle time - determines how fast the macro 'executes' one cycle.
Direction - determines in which 'direction' the macro executes.
Examples
Example: using a macro shape with positive values only
The Roboscan 918 has intensity control on control channel offset 1 (offsets starting at 0) with min/
max intensity settings at DMX values 0 and 255 respectively.
By assigning a 2*Sine macro shape (essentially the first half of a full sine wave) and a maximum
positive amplitude (255) to the channel, this macro will automatically generate values between 0 and
255 thus instruct the 918 to raise and lower the intensity from min to max and back to min again
following the and half sine wave shape in time. The macro values will combine with either the base
value of the macro or the value generated by the other program elements
(A) If reference value is 0 all the time, the result will be that the fixture will perform exactly as
programmed by the macro.
(B) If the reference value is kept at 255 the resulting combined values will range from 255 to 512.
Since 255 is absolute the maximum DMX value, the final output will automatically be cut at 255 -
resulting in no changes in the fixture intensity at all.
(C) If the reference value is kept at 128, all combined values above 255 will still be cut at 255 so the
intensity of the 918 will be at max for most of the time and only drop to a minimum value of 128
(approx. 50% intensity) when the macro contributes with a 0 value.
(D) As (C) but by scaling the macro with positive amplitude of 127 rather than 255 it is still possible to
'contain' the macro shape within the 0-255-value range. In this case the 918 will be programmed to an
intensity level between 50% and full, following the half sine shape.
Example: using a macro shape with positive and negative values
The Roboscan 918 controls color wheel 1 on control channel offset 2 with the following values (for the
lower part of the DMX value interval).
DMX-Value Color
0 open white
16 blue 111
32 red 301
48 magenta 507
64 green 202
80 yellow 604
96 purple 502
112 blue 101
128 pink 312
144 cyan 401