3. Go to the SETTINGS page (Figure 5, right) in the Web GUI. Make sure that the USB port
configuration is set to LEGACY mode and USB 5V is set to ENABLED.
4. The pod must be set in the “RETRA III” Light Engine control mode. The light engine control mode
setting is shown in green letters at the bottom of the pod display screen. If the pod is not in the
RETRA (L) Light Engine control mode, change the setting by holding down the MODE button on
the pod until the light engine selection menu appears. Move the cursor to “RETRA III” in the
selection menu by turning the pod control knob. Press the MODE button again to select the
RETRA (L) Light Engine control mode and return to the main control screen.
5. Follow instructions on Lumencor’s Light Engine Control Pod Operation sheet (54-10036). In brief,
press the COLOR button to select output light output channel, press the MODE button to toggle
light output on and o
ff
, turn the control knob to adjust intensity for the current light output
channel selection.
3.3.6 TTL Control
The TTL Interface provides users with a faster method of switching color channel outputs on and o
ff
.
Individual TTL inputs are provided for each color channel, as shown in the adjacent table. As a
safeguard against unintended light output when the inputs are initially connected, the light engine
TTL port is disabled and must be enabled by a serial command. To enable the TTL input, click the
Enabled
button next to “TTL inputs” in the GUI under the
Settings
tab (Figure 5, Settings Tab [right],
12) or send the standard mode command SET TTLENABLE to the LAN port. Input TTL signals can
be conveniently addressed using an accessory BNC breakout cable (Lumencor part no. 29-10156 or
29-10216; Figure 6) connected to the front panel TTL port. The breakout cable also provides a
global shutter input (labeled “shutter”). TTL signals input to the global shutter will synchronously
toggle all currently enabled source channels on and o
ff
.
4. Light Output Characteristics
RETRA (L) Light Engines may incorporate di
ff
erent numbers and types of solid state light sources.
Constituent light sources may include LEDs, luminescent light pipes or lasers. The number of light
sources installed and the bandpass filters associated with each are shown on the Certificate of
Conformance included with the shipping documents e-mailed by Lumencor to the customer. The
certificate of conformance also shows full (100%) power outputs for each source measured at the
terminus of the liquid light guide (LLG) or optical fiber (Figure 1). Not all sources may be turned on
simultaneously. To prevent exceeding the capacity of the DC power supply, power consumption is
tracked by the on-board computer. If a set limit (see
Governor
, Figure 5, Settings tab [right], 11) is
exceeded, either by increasing intensity settings for sources that are already on, or by turning on
additional sources, commands will be rejected. To clear the error condition, reduce intensities of
sources that are on, or turn o
ff
one or more sources.
RETRA (L) Light Engine Manual 57-10025
16
lumencor.com
