Dalsa CALIBIR 640 GigE, Руководство пользователя

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Calibir 640 GigE IR Camera User's Manual Troubleshooting • 101
Camera acquisition is good but frame rate is lower than expected
•
While running CamExpert and grabbing in free-run mode at the maximum frame rate, start
the Sapera Monitor tool from the Sapera Tools installed with Sapera.
•
Make sure the Memory Overflow event monitor is enabled.
•
Continue grabbing from the Calibir at maximum frame rate. If any memory overflow events
are counted, then the Calibir internal buffer could not be transmitted on time and was
discarded. Such a condition may occur with large frame color or high frame rate Calibir
cameras.
•
Note that the Sapera CamExpert tool has limits to the maximum frame rate possible due to
CamExpert generating an interrupt for each acquired frame. The Sapera Grab Demo may be
better suited for testing at higher frame rates.
•
Verify that network parameters are optimal as described in the Teledyne DALSA Network
Imaging Module manual. Ensure the host computer is not executing other network intensive
tasks. Try a different Gigabit NIC.
•
Note that a changed acquisition frame rate becomes active only when the acquisition is
stopped and then restarted.
Cabling and Communication Problems:
•
Use a shielded cable where the connector shell electrically connects the Calibir chassis to the
power supply earth ground.
• Check that the Ethernet cable is clipped both to the Calibir and the NIC or switch on the other
end.
•
Verify the Ethernet cabling. Poor cables will cause connections to auto-configure at lower
speeds. Use a secured Ethernet cable when the Calibir is in a high vibration environment. See
Ruggedized RJ45 Ethernet Cables.
• Check the Ethernet status LEDs on the NIC used with the camera. The Link Status indicator is
on and the activity LED should flash with network messages.
•
Verify that the Ethernet cable is CAT5e or CAT6. This is very important with long cable lengths.
• When using very long cables, up to the maximum specified length of 100m for gigabit Ethernet,
different NIC hardware and EMI conditions can affect the quality of transmission.
•
Minimum recommended Ethernet cable length is 3 feet (1 meter).
• Use the Log Viewer tool (see point below) to check on packet resend conditions. Run the Sapera
Log Viewer: Start•Programs•Teledyne DALSA•Sapera LT•Tools•Log Viewer. Start the
Calibir acquisition program, such as CamExpert. There should not be any "packet resend"
messages, else this indicates a control or video transmission problem due to poor connections
or extremely high EMI environments.