Basler scout GigE User Manual

Image Acquisition Control AW00011916000
172 Basler scout GigE
Increasing the Maximum Allowed Frame Rate
You may find that you would like to acquire frames at a rate higher than the maximum allowed with
the camera’s current settings. In this case, you must first use the two formulas described below to
determine what factor is restricting the maximum frame rate the most. Next, you must try to make
that factor less restrictive:
 You will often find that the sum of the exposure time plus the sensor readout time is the most
restrictive factor.
Decreasing the AOI height for the acquired frames will decrease the sensor readout time and
will make this factor less restrictive.
If you are using long exposure times, it is quite possible to find that your exposure time is making
this factor the most restrictive. In this case, you should lower your exposure time. (You may
need to compensate for a lower exposure time by using a brighter light source or increasing the
opening of your lens aperture.)
 The frame transmission time will not normally be a restricting factor. But if you are using
multiple cameras and you have set a small packet size or a large inter-packet delay, you may
find that the transmission time is restricting the maximum allowed rate. In this case, you could
increase the packet size or decrease the inter-packet delay. If you are using several cameras
connected to the host PC via a network switch, you could also use a multiport network adapter
in the PC instead of a switch. This would allow you to increase the Ethernet bandwidth
assigned to the camera and thus decrease the transmission time.
For more information about AOI settings, see Section 12.4 on page 238.
For more information on the settings that determine the bandwidth assigned to the camera, see
Section 5.2 on page 64.
Formula 1:
Calculates the maximum frame rate based on the sum of the exposure time plus the sensor readout
time:
Where:
AOI Height = the height of the acquired frames as determined by the AOI Height settings.
The constants C
1
and C
2
depend on the camera model as shown in the table below:
For more information about setting the exposure time, see Section 9.7 on page 141.
scA750-60 gm/gc
C
1
30.99 µs
C
2
185.93 µs
Max. Frames/s
1
Exposure Time in µs AOI Height 1+C
1
C
2
++
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Basler scout GigE Specifications

General

Brand	Basler
Model	scout GigE
Category	IP Camera
Language	English