Pyramid Imaging EXO Series, Manual

Page: 85 / 135

SVS-VISTEK
Feature-Set 85
T
H E I N T E N S I T Y O F A
P W M :
That duty ratio is calculated as: Δ % = t / T. It is written about the value of
"t" as PWMChange0-3[SeqSelector] per sequence into the Registry.
PWMChange0-3[SeqSelector] is to be written as a percentage value.
E
X A M P L E S O F
P W M
S
:
Figure 49: 25 % intensity Figure 50: 50 % intensity
Figure 51: 75 % intensity
The integrals over both periods
𝑇
𝐴
and
𝑇
𝐴
are equal.
� 𝐀
𝑡
𝐴2
𝑡
𝐴1
= � 𝐁
𝑡
𝐵2
𝑡
𝐵1
An equal amount of Photons will be emitted. The
intensity of light is the same.
𝑡
𝐴2
− 𝑡
𝐴1
= 𝑡
𝐵2
− 𝑡
𝐵1
The periods
𝑇
𝐴
and
𝑇
𝐵
are equal in length.
T
H E
P W M
M O D U L E
:
7.3.5 Optical Input
An optical input is designed for galvanic separation of
camera and triggering device. Noise, transients and voltage
spikes might damage your components. Also trigger signal
interpretation can be difficult with unclear voltage potentials