Principles of Operation
17
2
2
2
2
2
2
2
2
2
Step 3. Apply the Reference
Using the equation
reference
=
gain
(Vmax + offset),
with the offset
equal to 0.4032 V, V
max
equal to 1.1 V, and the gain equal to 0.5,
reference
is determined as follows:
reference
= 0.5 (1.1 V+ 0.4032 V)
reference
= 0.7516 V
Since the voltage increment for reference is 5000 µV and you want the
reference as close to 0.7516 V (751600 µV) as possible, calculate the
best fit for reference based on a step of 50 0 0µV, using the following
equations:
751600 µV / 5000 µV = 150.32 µV// 150 (round to nearest whole
number)
150 µV * 5000 µV = 750000 µV // multiply for actual reference
reference
= 0.75 V
Values greater than 0.75 V are digitized to white.
shows the
effect of using a reference value of 0.75 V, a gain value of 0.5, and an
offset of 0.4032. The DT3152-LS board can now digitize the entire
video signal from
−
0.4 V to 1.1 V, relative to the camera output.
Содержание DT3152-LS
Страница 1: ...MACH Series UM 16481 F DT3152 LS User s Manual ...
Страница 4: ......
Страница 16: ...About this Manual xvi ...
Страница 17: ...1 1 Overview Features 2 Supported Software 4 Accessories 6 ...
Страница 142: ...Chapter 4 126 ...
Страница 143: ...127 5 Troubleshooting General Checklist 128 Service and Support 132 If Your Board Needs Factory Service 136 ...
Страница 153: ...137 A Specifications ...
Страница 156: ...Appendix A 140 ...
Страница 157: ...141 B Connector Pin Assignments Connector J1 Pin Assignments 142 Connector J2 Pin Assignments 144 ...
Страница 162: ...Appendix B 146 ...
Страница 192: ...Appendix C 176 ...
Страница 193: ...177 D Asynchronous Reset Cameras ...
Страница 196: ...Appendix D 180 ...
Страница 210: ......
Страница 214: ......