User Manual

Appendix
How to install a GigE camera (Bigeye/Pearleye/Goldeye) V2.1.0
48
GigE Vision timer calculations
The figure below shows how an exposure signal is generated.
In order to adjust t
Exp
and t
Dark
of the TREX pulse in each case two parameters
are available:
• ExposureTime & ExposureTimeGranularity
• DarkTime & DarkTimeGranularity
The granularities are integer values in the range from 0…65535 which define
the minimum and maximum pulse widths. The minimum pulse width is equal to
the time granularity.
Figure 28: GigE Vision timer calculations
t
ExpMIN
μs
ExposureTimeGranularity 1+30ns
1000
-------------------- --------------------- ---------------------- -----------------------
=
t
ExpMAX
μs
ExposureTimeGranularity 1+30ns 65535
1000
---------------------- ---------------------- ---------------------- -------------------------- --------------
=