Fairchild Imaging MRDI User Manual page 20

...in this basic mode, usually used for diagnostics & debugging,
...instead, the camera drives the system with the LineValid Camera Output.
n
t
LineValid
Camera Output
t
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Notes specific to this mode
1 The camera is not triggered -- instead, the camera itself synchronizes the system. This is the default mode
set by the factory
2 The camera internally initiates readout of line "n" on its own. LineValid goes high a time "t
3 The user must synchronize motion of the material moving past the camera to the camera's LineValid output
4 The user must synchronize collection of data in the PC frame grabber to the LineValid camera output
5 While LineValid is high, data may be sampled on rising edges of Camera Strobe Output for the 2048 clock cycles
of readout as shown in the inset above; this is the same for all four modes
6 A time "t " after the camera internally initiates the readout-and-integration cycle, the camera also internally
Initiation
initiates pixel reset; Integration then begins time "tReset" later, with this integrated information to be read out
in the subsequent line "n+1"
7 The factory-set default is for integration to run until the end of the line period, which results in a maximum
integration time "t
IntegrationMax
8 The line period "t " and the integration time "t
LinePeriod
Fairchild Imaging • CAM/CMOS-2K.LS Line Scan Camera User's Manual • Rev A • 20 of 41
Table 3.4.2 --
no triggering is applied to the camera...
The Line Period and Integration
t
Reset
Initiation
t
Readout
2048 Clock Cycles
Da ta Ca m e ra O utput
Strobe Ca m e ra Output
Line V a l id Ca m e ra O utput
" = "t " - "t " - "t
LinePeriod Reset
Integration
Mode 1: Freerunning
t
LinePeriod
t
IntegrationMax
may be shortened
with the Command Software
1 2
".
Initiation
" are selected by the user with the Command Software
n+1
3 2047 2048
" afterwards
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