U
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ANUAL
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06/2017
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35
Full Exposure Control Mode
During the 4S => 2S transition and the 2S => 4S transition (passing at the switch point) two “bad” lines
appear (either too dark or too bright). You can remove these lines by using the following parameter:
4S Only
: The sensor doesn’t switch in 2S. The result is that , maybe after a short saturation, the level
decreases as the Line Period increases. This mode is the best one if the Line period varies but doesn’t
increase that much after the switch point (
4 x Max (TPer
mini
, Prog_Tint) + 10µs
)
“Without all Lines”
:
The Switch 4s
2S is made in the conditions described above. All the lines are
sent, even the double dark or double white at the transition (depending on the direction of the
transition).
“Without Incorrect Lines”
:
The Switch 4s
2S is made in the conditions described above. The
double dark or double white lines at the transition (depending on the direction of the transition) are
removed (not sent) : Two lines triggered will miss in the LVAL signal.
Gain for the “Full Exposure Control Mode”
G
stb
: The User Can set this Gain with a value up to x4 (Gain Section). The value recommended is
the one which allows to cover the variation of the line period : 10% of variation requires a Gain at
least of x1.2 (+/- 10%).
By default this value is set at x4.
Gain Full Exposure Control (G
stb
):
Set the Gain for the Control of Full Exposure Mode . This value is
available in the CommCam “Gain & Offset” section :
Read function : “
r stbg
”;
Return by the sensor : value of the Gain between 0 and 49151
Write Function : “
w stbg
<value>”
<value> = Gain between 0 and 49151 (Gain = 1 + <value>/16384)
7.3.1
Command Table
Feature
Commands
Description
LinePeriod
r tper
Get current line period
w tper <val>
Set line period, from from 1 (0,1µs) to 65535 (6553,5µs), step 1
(0,1µs)
LinePeriodMin
r tpmi
Get current line period min (0..65535 step 0,1µs)
AcquisitionLineRate
Xml Virtual
= 1 / LinePeriod in Hertz
ExposureTime
r tint
Get exposure time
w tint <val>
Set exposure time, from 1 (0,1µs) to 65535 (6553,5µs), step 1
(0,1µs)
TriggerPreset
r sync
Get trigger preset mode
w sync 0
Set trigger preset mode to Free run timed mode, with exposure
time and line period programmable
w sync 1
Set trigger preset mode to Triggered mode with exposure time
settings
w sync 2
Set trigger preset mode to Triggered mode with maximum
exposure time
w sync 3
Set trigger preset mode to Triggered mode with exposure time
controlled by one signal
w sync 4
Set trigger preset mode to Triggered mode with exposure time
controlled by two signals
w sync 5
Set trigger preset mode to Free run mode, with max exposure