Basler raL2048-48gm User Manual download pdf (Page 50)

Network Related Camera Parameters and Managing Bandwidth AW00118302000

40 Basler racer GigE

transmission rate will be. After you have adjusted the Inter-packet Delay parameter on each

camera, you can check the sum of the Bandwidth Assigned parameter values and see if the sum is

now less than 125 MByte/s.

5.2.1 A Procedure for Managing Bandwidth

In theory, managing bandwidth sharing among several cameras is as easy as adjusting the inter-

packet delay. In practice, it is a bit more complicated because you must consider several factors

when managing bandwidth. The procedure below outlines a structured approach to managing

bandwidth for several cameras.

The objectives of the procedure are:

 To optimize network performance.

 To determine the bandwidth needed by each camera for frame data transmission.

 To determine the bandwidth actually assigned to each camera for frame data transmission.

 For each camera, to make sure that the actual bandwidth assigned for frame data transmission

matches the bandwidth needed.

 To make sure that the total bandwidth assigned to all cameras does not exceed the network’s

bandwidth capacity.

 To make adjustments if the bandwidth capacity is exceeded.

Step 1 - Optimize the Network Performance.

If, as recommended, you are using the Basler performance driver with an Intel PRO network

adapter or a compatible network adapter, the network parameters for the network adapter are

automatically optimized and need not be changed. Go on to step two now.

If you are using the Basler filter driver and you have already set the network parameters for your

adapter during the installation of the Basler pylon software, go on to step two now.

Otherwise, open the Network Connection Properties window for your network adapter and check the

following network parameters:

 If you are using an Intel PRO network adapter, make sure the Receive Descriptors parameter is

set to its maximum value and the Interrupt Moderation Rate parameter is set to Extreme.

Also make sure the Speed and Duplex Mode parameter is set to Auto Detect.

 If you are using a different network adapter, see whether parameters are available that will

allow you to set the number of receive descriptors and the number of CPU interrupts. The

related parameter names may differ from the ones used for the Intel PRO adapters. Also, the

way of setting the parameters may be different. You may, for example, need to use a

parameter to set a low number for the interrupt moderation and then use a different parameter

to enable the interrupt moderation.

If possible, set the number of receive descriptors to a maximum value and set the number of

CPU interrupts to a low value.

If possible, also set the parameter for speed and duplex to auto detect.

Contact Basler technical support if you need further assistance.

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Basler raL2048-48gm User Manual Page 50