14
MAC 101 user manual
RAW
and
RGB
modes include the same control options as
BASIC
mode, but they provide 4 extra channels
to give RGB control and CTC.
See “DMX protocols” on page 22 for details of the DMX commands available in the different modes.
Tailoring performance
Pan and tilt movement
The
P/T SPEED
settings set the maximum speed of pan and tilt movement.
FAST
optimizes for speed and
SLOW
optimizes for smoothness of movement.
NORMAL
is the default setting and gives a good
compromise between these two.
The
PAN INVERT
and
TILT INVERT
commands reverse the direction of pan and tilt, and the
SWAP
command sends pan commands to tilt and vice versa. These settings are useful for symmetrical effects with
multiple fixtures.
Cooling
FANS
gives you a choice of two settings:
• The default setting
REGULATED
should suit use in all normal situations and ensure excellent service
lifetimes for all components.
•
FULL
maximizes cooling and reduces the operating temperature of the components in the head. It is
recommended when the MAC 101 is used intensively in a warm environment or in fixed installations. Note
that it will give increased fan noise compared to the other cooling modes.
Whatever cooling mode is selected, a thermal cutout shuts down power to the LEDs if the fixture
temperature exceeds safe limits. If this occurs, you must reset the fixture via the control menus or via DMX,
or cycle power to the fixture off and on again.
If a thermal shutdown occurs, you are pushing the fixture to its limits. Clean the fixture, particularly the air
vents, and check that there is sufficient airflow around the fixture. Consider increasing ventilation, reducing
the ambient temperature, or switching to
FULL
mode. Contact Martin for service if a thermal shutdown
persists.
Dimming
DIMMER CURVE
provides four dimming options (see Figure 3):
•
LINEAR
– the increase in light intensity appears to be linear as DMX value is increased.
•
SQUARE LAW
– light intensity control is finer at low levels and coarser at high levels.
•
INVERSE SQUARE LAW
– light intensity control is coarser at low levels and finer at high levels.
•
S-CURVE
– light intensity control is finer at low levels and high levels and coarser at medium levels.
Whichever
DIMMER CURVE
option you select, you can choose between
FAST
or
SMOOTH
dimming
settings:
•
FAST
is the default setting. It gives a virtually instantaneous reaction when you dim from one intensity to
another, but dimming slowly from one intensity to another may appear slightly uneven.
• The
SMOOTH
setting gives smoother dimming during slow changes in intensity, but it limits the speed of
dimming changes slightly. This makes it ideal for slow, smooth dimming, but a short time-lag may be
noticeable if you try to dim quickly from one intensity to another.
Ou
tp
ut
DMX %
DMX %
DMX %
DMX %
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tp
ut
Ou
tp
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tp
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Optically linear
S-curve
Square law
Inverse square law
Figure 3: Dimming curve options
