Soluciones y Tecnologías de Control Embebido S.A.P.I. de C.V.
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spectrometer was assumed whose trigger signal admits TTL voltage levels, with positive logic and
that will be activated with rising edge, in addition, it admits a pulse with a minimum width of 10
µs. Thus, the configuration of channel C would be as follows.
Fig. 35. Set the C output for the trigger of your spectrometer, the Delay C value of 100 µs is only a
suggestion, in practice this value should be adjusted until the desired spectrum quality is obtained, for
example, until the laser emission line disappear from the spectral capture, likewise, the width pulse C must be
adjusted according to the allowed in your spectrometer
In practice, you can adjust the Delay of the spectrometer with respect to the firing of the laser
flash lamp, remembering that it is connected to the input of the retarder. One way to carry out
said adjustment of the delay of the spectrometer is to increase it to a value where the laser
emission line does not appear, so that the integration of the optical sensor will be occurring
instantaneously after the laser pulse. As a starting point you can also use the same delay value for
the Q-Sw, which in practice will mean that the trigger of the spectrometer will be given at the
same time as the laser pulse and from this value decrease or increase the delay C, it will depend
on the particular characteristics of the optical spectrometer.
Connect the DG-3O1I-17 to the laser. Note that if you adjust the channel B assigned to the Q-
Sw, you may have to readjust the C delay of the spectrometer, since both delays are triggered
from the same input signal, and therefore the time difference between channel B and C is what
will be effectively regulating the quality of the capture spectra.
Once the retarder and laser have been configured, proceed to connect the coaxial cables
(verify that the cables are in good condition and with electrical continuity), according to the
following image.
