User`s manual

Genie Color Series-GigE Vision Camera Troubleshooting • 119
Older Laptop Computer Networking Issues
Laptop computers with built in GigE network adapters may still not be able to stream full frame rates from Genie.
Laptops with gigabit Ethernet PCMCIA boards may not be able to stream video at all unless network parameters are
modified. Thorough testing is required with any laptop computer.
Streaming video problems may change depending on the computer chipset and NIC combinations. Laptops running
on battery power may exhibit more bandwidth issues due to the inherent power saving characteristics of laptops.
This section describes a few configuration items to modify for best performance. Verify the Genie at the frame rates
required or to determine the maximum frame rate possible with the laptop used.
Configuration Recommendations with Laptops
• In the NIC configuration, keep the jumbo frame size set to the maximum allowed. See "Increasing Adapter
Buffers and Jumbo Frames" on page 24.
• If VPN software is installed, most likely the VPN driver must be disabled in the NIC properties (open via
Control Panel). This would be required only on the NIC used with the Genie.
• Run the Sapera Log Viewer: Start•Programs•DALSA•Sapera LT•Tools•Log Viewer. Start the Genie
acquisition program, such as CamExpert. There should not be any "packet resend" messages, else this indicates
problem due to poor connections or extremely high EMI conditions.
• Packet resends might also be eliminated by adjusting the GigE parameter Inter-Packet Delay. Using CamExpert
(see "
CamExpert GigE Vision Parameters" on page 64), increase the inter-packet delay value from 0 to
0.000050 (50µs) and test again.
Problems with Disconnecting NICs
Genie cameras installed in environments with physical motion, vibrations, or high EMI may be disconnected by the
NIC. The following items need to be reviewed to solve the problem.
• Motion or vibrations may cause data loss because the Ethernet cable connection is not secure. Use a locking
Ethernet cable (see "
Ruggedized RJ45 Ethernet Cables" on page 102).
• High EMI may cause the NIC to drop data or to disconnect and reconnect at a lower data rate. Such situations
do not have simple solutions and may require an expert consultant.
• Some NIC products may not tolerate any data disruptions. Any condition causing the NIC to drop the
connection may make it unrecoverable. Communication with the Genie can not be reestablished without power
cycling. In this case, trying a variety of NIC products is suggested.