Ethernet Switch Requirements For Calibir Gxm640 - Dalsa Calibir GXM640 User Manual

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While CamExpert can be used for evaluating a camera, an application typically uses the
Sapera LT API to configure the camera's parameters and acquire images. Sample
applications are provided along with source code, to speed up application development.
By default they are installed under the directory:
C:\Program Files\Teledyne DALSA\Sapera\Demos\
Of particular interest is the GigE Camera Demo (available in pre-compiled form, with
C++ and C# source projects). This project provides everything needed to acquire images
from the camera. It can be easily modified to write required values to parameters (called
'features' in GenICam). For example, in C++ it can be implemented as:
m_AcqDevice->SetFeatureValue("PixelFormat", "Mono16");

Ethernet Switch Requirements for Calibir GXM640

When there is more than one device on the same network or a camera-to-PC separation
greater than 100 meters, an Ethernet switch is required. Since the Calibir GXM640
cameras comply with the Internet Protocol, they should work with all standard Ethernet
switches. However, switches offer a range of functions and performance grades, so care
must be taken to choose the right switch for a particular application.
IEEE 802.3x Pause Frame Flow Control
Ethernet Switches supporting Full-duplex IEEE 802.3x Pause Frame Flow Control must
be used in situations where multiple cameras may be triggered simultaneously. In such
a case the NIC maximum bandwidth would be exceeded if there was no mechanism to
temporarily hold back data from cameras. Calibir cameras support the IEEE 802.3x pause
frame flow control protocol automatically so that images from many cameras can be
transmitted through the switch to the NIC efficiently, without data loss. As a working
example, one such switch tested at Teledyne DALSA is the NETGEAR GS716T.
Even if a given Ethernet switch supports Flow Control, often this feature is
disabled in the switch configuration to provide best compatibility with older
equipments. Please refer to the switch's documentation.
IEEE 1588 / PTP Transparent Mode
GigE switches which support PTP Transparent mode will help reduce the variability of
timestamp adjustments when cameras are synchronized with PTP/IEEE1588, but aren't
required.
Important: The maximum frame rate possible from a large number of Calibir
cameras which are simultaneously triggered will depend on the Calibir model,
frame size, and network details. Each imaging system should be tested for data
rate limits.
Calibir GXM640 IR Camera User's Manual Calibir GXM640 Overview  17