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E
FFECTS
The MAC 2000 Wash is compatible with USITT DMX512 controllers. The fixture has two DMX operating
modes, 8-bit and 16-bit.16-bit mode requires two more DMX channels than 8-bit mode but provides more
precise pan/tilt positioning. All other functions are identical. See "DMX protocol" on page 29.
Color
The color mixing system uses continuous dichroic cyan, magenta, and yellow (CMY) color filters. It is a
subtractive system that removes color from white light. Inserting all three filters results in loss of light: for
maximum brightness, mix 2 colors at a time.
In addition, two color wheels are provided, each with four removable positions for dichroic glass color filters
and a position for a direct pass through of the beam.
Dimming and strobe
Two dimming systems are available - a built-in mechanical dimmer/shutter and an optional dimmer wheel
(orderable separately).
Shutter
The mechanical shutter system provides full-range 100 percent dimming, instant open and blackout,
random and variable strobe effects up to 10 Hz, and random and variable pulses in which the dimmer snaps
open and slowly dims or snaps closed and slowly opens. Two dimming curves are available; one that
simulates a tungsten lamp and another that provides linear dimming (see "Shutter dimming curves" on
page 13).
Optional dimmer wheel
A separately orderable dimmer wheel (P/N 62324018) that provides enhanced dimming can be installed in
place of color wheel 2. The dimmer wheel uses a logarithmic algorithm that, compared with the dimming
available from the shutter system, enables much finer and smoother dimming at the bottom end of the
dimming range.
If you use the dimmer wheel, it is recommended that you do not use the shutter system to control intensity,
and that the shutters be set to fully open (ensure that 255 is the default DMX value issued on the shutter
intensity channel from your controller). You can continue to use other shutter effects, such as the strobe.
The wheel is detected automatically by the fixture when installed. The installation procedure is described in
"Installing the optional dimmer wheel" on page 22.
Color temperature correction
The color temperature correction (CTC) system uses a continuous 0 - 178 mireds color filter that lowers the
color temperature from 6000 K to 2900 K.
Motorized zoom
The zoom lens widens the beam from 11° at full spot to 40° at full flood with the standard lens and aperture
ring fitted.
16
MAC 2000 Wash
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