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DMX modes
The CONTROL MODE menu lets you set the MAC Viper AirFX to one of the two DMX operating modes,
basic 16-bit and extended 16-bit:
• Basic 16-bit mode offers coarse control of all effects plus fine control of gobo indexing angle on both gobo
wheels, pan and tilt.
• Extended 16-bit mode provides all the features of basic 16-bit mode plus fine control of the dimmer, zoom
and focus.
The MAC Viper AirFX uses 20 DMX channels in basic 16-bit mode and 28 DMX channels in extended 16-bit
mode.
To set the fixture's DMX mode:
1. Click the jog wheel to enter the main menu.
2. Rotate the jog wheel to scroll down to CONTROL MODE, then click the jog wheel. Rotate the jog wheel
to select either BASIC or EXTENDED, then click the jog wheel to save.
3. Press the Escape button to step back to the main menu.
Fixture ID
The MAC Viper AirFX lets you set a four-digit ID number to ease identification of the fixtures in an
installation. When a fixture is powered on for the first time, it displays its DMX address by default. As soon
as you set an ID number other than 0 in FIXTURE ID, the MAC Viper AirFX will display this ID number by
default, and indicate FIXTURE ID in the display.
Personality
The MAC Viper AirFX provides several options that let you optimize the fixture for different applications in
the PERSONALITY menu:
• The PAN/TILT menu lets you swap and/or invert pan and tilt.
• The SPEED menu lets you set PAN/TILT to NORMAL, FAST (optimized for speed) or SLOW (optimized
for smooth movement – useful for slow movements in long-throw applications). Likewise, you can select
an overall speed for all the effects by setting EFFECT speed to NORMAL, FAST or SLOW. You can also
set effect speed to FOLLOW P/T, in which effects will always use whatever speed is set for pan and tilt.
• DIMMER CURVE provides four dimming options (see Figure 5):
DMX %
Linear
- LINEAR – (optically linear) the increase in light intensity appears to be linear as DMX value is
increased.
- S-CURVE – light intensity control is finer at low levels and high levels and coarser at medium levels.
This curve emulates the RMS voltage dimming characteristics of an incandescent lamp such as the
tungsten halogen lamp of the Martin™ MAC TW1™.
- SQUARE LAW – light intensity control is finer at low levels and coarser at high levels.
- INV SQUARE LAW – light intensity control is coarser at low levels and finer at high levels.
• FOCUS TRACKING sets focus to automatically switch between the three zoom/focus settings when you
use the zoom effect (see "Zoom/focus linking" on page 7).
• AUTO LAMP ON gives three lamp strike options:
- When set to OFF, the lamp remains off until a "lamp on" command is received via DMX.
- When set to ON, the lamp strikes automatically after the fixture is powered on.
DMX %
S-curve
Figure 5: Dimming curve options
Control panel operations
DMX %
Square law
Inverse square law
DMX %
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