U
SER
M
ANUAL
16
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CXP
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06/2017
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Not relevant.
Prog_Tint
has to be smaller than
Tper.
The sensor is in full exposure and the gain applied on the output is
fixed b
y the User =
G
stb
(max. x4)
If Tper < 4 x Max (TPer
mini
, Prog_Tint) + 10µs
The Sensor works in Full Exposure during the whole Line Period (LP) and the gain applied on the
output is variable (max x 4), set by User =
G
stb
The Output is multiplied by the following Gain =
G
stb
x Prog_Tint / Tper
If Tper >= 4 x Max (TPer
mini
, Prog_Tint) + 10µs
The Sensor Switches in a specific 2S mode (equivalent) :
Not possible for “BH0” models
The exposure is now controlled as the sensor doesn’t work in “TDI” mode.
The Exposure applied is =
4 x
Pro 1.9µs
A fixed Gain of
x2
is applied on the output to ensure the continuity with the output before the switch
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
)
This is the only possible mode for the BH1 Models
“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” (set in Gain & Offset Section)
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.
Trigger too Slow
By default, the trigger is considered too slow after 1000ms of missing Incoming Trigger.
This limit can be tuned now by the User. This tuning is particularly important when the
camera is in
4S
with the
Exposure control active
and the Control Exposure mode set in “
4S
Only
” : In this mode the incoming Line Period is delayed from one line to be reproduced in
the camera after an exact measurement of the Line Period. If the trigger stops for a period
of time below the limit, this will considered as a “long time Line” and not a stop : Then the
next line will be delayed from the same value with the risk to loose new incoming triggers.
The Trigger too Slow limit has to be set at a value which is considered in the Application as
the minimum value for a real stop in the incoming trigger.