User`s manual

22 Pantera 1M60 and 1M30 User’s Manual
DALSA 03-032-10033-09
3. Then, when applicable, use the commands ssf (mode 2 or 7) to set the frame rate
and/or
set (mode 2 or 6) to set the exposure time. Refer to Step Two on page 25 for
details.
3.7.1 Step 1: Setting the Exposure Modes
In internal sync modes, (modes 2 and 7), the camera delivers, independent of external
signals, data according to the timing set internally. In external sync modes (modes 3, 4,
and 6), the camera starts integration after an external trigger pulse.
To set the camera exposure mode, use the command:
Syntax:
sem i
Syntax Elements:
i
Exposure mode to use. Default is 2.
Notes:  Refer to
Table 7 for a quick list of available modes or to the
following sections for a more detailed explanation.
 To obtain the current value of the exposure mode, use the
command
gcp.
Related Commands:
ssf, set
Example:
sem 3
Mode 2: Internally Programmable Frame Rate and Exposure Time
When setting the frame rate (using the ssf command), exposure time will change to
accommodate the new frame rate. The exposure time will always be set to the maximum
time (frame period – frame transfer time – charge reset time) for that frame rate when a
new frame rate is entered.
Example 1: Exposure Time less than Frame Period
Pr o gr ammab l e Period
CR Ex po sur e T i meFT FT CR Ex po sur e T i me
Programmable Peri od
Readout
Fr ame Per i od Fr ame Per i od
Readout
Mode 3: External Trigger with Maximum Exposure
Frame rate is set by the period of the external trigger pulses. Since there is no electronic
shuttering, any trigger pulses faster than the read out time are ignored. The falling edge
of the external trigger marks the beginning of the exposure.
During the frame transfer state, 1030 lines are transferred down from the sensor’s image
area to the storage area (see
Figure 1: FTT 1010-M Image Sensor for sensor architecture). If
you are operating the camera with exposure control enabled (see page
25 for an
explanation on how to disable or enable exposure control), an extra line is transferred to
the storage area. While the last line is being transferred, the charge reset also occurs.
FT = Frame Transfer
Time
CR= Charge Reset