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Operation
Overview
The main goal of the XPAND Passive 3D Polarization Modulator Gen2 unit is to modulate the light coming from the projector in a way which
enables 3D viewing when using circular polarized passive 3D glasses. The modulation must be done in synchronization with the projector.
To achieve this synchronization a 3D synchronization signal is fed from the projector to the modulator using one of the cables supplied
with the modulator.
Much of the modulator’s operation can be configured over the network by using a dedicated PC-based configuration utility. See the
Modu-
lator Configuration Using the PC Based Configuration Utility
section of this manual for more information.
Factory Reset
At any time the XPAND Passive 3D Polarization Modulator Gen2 can be reset to its factory default settings by following these steps:
(1) Unplug all cables from the modulator.
(2) Short pins 3 and 4 of the unit’s GPIO port.
(3) Plug the power back into the modulator.
(4) Both LEDs on the unit should now be flashing quickly, indicating that a factory reset is about to be done.
»
To confirm the factory reset, remove the short circuit between pins 3 and 4. The modulator will make two more slow flashes
with both LEDs to indicate, that a reset has been made.
»
To abort a factory default reset, unplug the power cord from the modulator and
only then
remove the short circuit.
A reset is especially useful when performing network settings configuration if a mistake is made. A Factory Reset will return the modulator
to its factory default settings, making the modulator again accessible at its default IP of 192.168.0.250.
Note that network settings of the unit will be reset as well so if its settings have been previously modified the modulator will now no longer
be reachable and the network settings should be reconfigured. See section
Unit’s Initial Network Settings Configuration
for more
information.
Modes of Operation
The modulator operates in one of two modes: 2D mode or 3D mode. As their names suggest, the 3D mode is intended for watching 3D
content and 2D mode for viewing 2D content at which point the modulator should be removed from in front of the projector.
Which mode the modulator is operating in is determined by different conditions which depend on which mode control source is selected.
See section
Mode Control Sources
for more information.
The modulator signals if it is in 2D or 3D mode through its SYNC / 3D MODE LED, through its Motion Control Output and through the opera-
tion of its cooling fan. For more information see sections
LED Indications
,
Motion Control Output
and
Cooling Fan
.
2D Mode
In 2D mode the modulator stops modulating its LC shutter, turns off the cooling fan and sets its Motion Control Output to 2D state (see
section
Motion Control Output
for more details). A 2D state on the Motion Control Output triggers the movement of the unit away from the
projector, if mounted onto a motorized mount connected to this output.
In 2D mode the SYNC/3D MODE LED state depends on which mode control source is currently selected. See
LED Indications
and
Mode
Control Sources
sections of this manual for more information.
While in 2D mode, the unit continuously scans for conditions to transition to 3D mode. These conditions depend on which mode control
source is selected - refer to section
Mode Control Sources
.
3D Mode
In 3D mode the modulator turns on its cooling fan and sets its Motion Control Output to 3D state (see section
Motion Control Output
for
more details). A 3D state on the Motion Control Output triggers the movement of the unit in front of the projector, if mounted onto a motorized
mount connected to this output.
If a valid 3D synchronization signal is fed from the projector to the modulator, the unit starts modulating its LC shutter and normal 3D viewing
is possible. Validity of the signal is determined by f
smin
(3D Sync Low Threshold Frequency) and f
smax
(3D Sync High Threshold Frequency). See
macros descriptions in section
Network Mode Control Source
and section
Using the Configuration Utility
.
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