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148
Troubleshooting
Calibir GXM640 IR Camera User's Manual
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.