opto engineering ITALA - Bandwidth Limit; Image Format Control

Itala | INSTRUCTION MANUAL
6.1.1 Bandwidth limit
The DeviceLinkThroughputLimit feature allows to limit the bandwidth available for the camera
data streaming. Delays will be uniformly inserted between transport layer packets in order to con-
trol the peak bandwidth. This is equivalent to directly set the inter-packet delay value through the
GevSCPD feature in the Transport Layer Control section. A suitable delay in data transfer will
prevent the camera from "overrunning" the transfer interface limit.
The bandwidth limit is especially useful when setting up a multi-camera system with an installed
bandwidth lower than the sum of the bandwidth of the single device. Setting a proper limit on
each device ensures the lowest amount of collisions on the network, maximizing performances
and improving overall stability.
The relationship between the inter-packet delay and the resulting bandwidth is the following:
BW [Mbps] = BW
MAX
[Mbps]
(P S + 18)
(P S + 18) + SCP D · 0.125
(1)
where BW
MAX
is the maximum bandwidth of the device link (DeviceLinkSpeed), P S is the nego-
tiated packet size (GevSCPSPacketSize) and SCPD is the inter-packet delay (GevSCPD).
6.2 Image Format Control
The Image Format Control section describes how to configure image size and format.
Feature Description Interface Access
SensorWidth Effective width of the sensor in
pixels
IInteger R
SensorHeight Effective height of the sensor in
pixels
IInteger R
SensorPixelWidth Physical size (pitch) in the x
direction of a photo sensitive
pixel unit
IFloat R
SensorPixelHeight Physical size (pitch) in the y
direction of a photo sensitive
pixel unit
IFloat R
SensorName Product name of the imaging
Sensor
IString R
WidthMax Maximum width of the image (in
pixels)
IInteger R
HeightMax Maximum height of the image (in
pixels)
IInteger R
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