ALLIED Vision Technologies Guppy F-503 - Manual (Page 181)

Controlling image capture
GUPPY Technical Manual V7.1.0
181
Exposure time (shutter) and offset
The exposure (shutter) time for continuous mode and Trigger_Mode_0 is
based on the following formula:
Shutter register value x timebase + offset
The register value is the value set in the corresponding IIDC register
(SHUTTER [81Ch]). This number is in the range between 1 and 4095.
The shutter register value is multiplied by the time base register value (see
Table 116: Time base ID on page 263). The default value here is set to 20 µs.
Exposure time of GUPPY F-036 (CMOS)
The CMOS sensor of GUPPY F-036 enables shutter times in integer multiples
of the row time (29.89 µs).
Exposure time of GUPPY F-503 (CMOS)
The row time of GUPPY F-503 depends on the shutter mode.
GUPPY F-503 row time for global reset release shutter (GRR)
In global reset release shutter the formula for the row time is:
The minimum row time and the row time by maximum resolution are:
GUPPY F-503 row time for electronic rolling shutter (ERS)
In electronic rolling shutter the exposure time is independent from row time
and is set via Extended shutter advanced register with µs precision.
For more information see Chapter Extended shutter on page 264 and Table
117: Advanced register: Extended shutter on page 264.
Note

Although you can enter shutter register values as usual, the
camera will round down to integer multiples of the row time.
Formula 9: Row time for GUPPY F-503 (CMOS): GRR
Formula 10: Min. row time and row time by max. resolution for GUPPY F-503 (CMOS): GRR
t
row
11.97ns width

10.77µs + =
t
row min
11.63µs =
t
row max res
41.80µs =