(shutter = open) from all active light sources. Light sources must first be activated by serial command or
manual control. <+1.5 V “low” DC levels terminate light output (shutter = closed). The default level is high
(shutter = open). In SEQ mode, >+3.3 V “high” DC levels trigger the red, green and blue sources (in that
order; Figure 10). <+1.5 V “low” DC levels turn light sources off. The default level is low.
Notes
[1] TTL enables/disables and serial on/off commands have a logical OR relationship. Therefore on/off
controls in the GUI or other serial control software must be set in the “OFF” state when using TTL triggering.
4. Spectral Output
The typical spectral output distribution of a LIDA light engine is shown below (Figure 11).
LIDA Light Engine Instruction Manual
11
Figure 11.
LIDA Light Engine spectral output distribution.
Figure 10.
Sequential triggering of LIDA red (R), green (G) and blue (B) sources. The blue
trace represents an input pulse train (1 kHz, 80% duty cycle) applied to the gate/seq lead of
the 4-channel BNC breakout cable (29-10081) connected to the LIDA TTL port. The red
trace represents the light output from the LIDA detected by an analog photodiode.
