Princeton Instruments PhotonMAX System, Manual, Page: 77 / 98

Chapter 7 Troubleshooting 77
6. Reboot your computer.
7. Restart WinView and begin acquiring data or focusing. If you see the message
again, increase the DMA buffer size.
Serial violations have occurred. Check interface cable.
Figure 67. Serial Violations Have Occurred dialog box
This error message dialog will appear if you try to acquire an image or focus the camera
and either (or both) of the following conditions exists:
•
The camera system is not turned ON.
•
There is no communication between the camera and the host computer.
To correct the problem:
1. Turn OFF the camera system (if it is not already OFF).
2. Make sure the computer interface cable is secured at both ends.
3. After making sure that the cable is connected, turn the camera system power ON .
4. Click
OK
on the error message dialog and retry acquiring an image or running in
focus mode.
Note:
This error message will also be displayed if you turn the camera system OFF or a
cable comes loose while the application software is running in Focus mode.
Smeared Images
PhotonMAX uses a frame-transfer CCD which allows simultaneous exposure-readout
operations (see pages 48-52 for more information). However, when the exposure time is
small compared to the frame-transfer time, smearing may appear in the images. To
alleviate this problem:
1. Use a longer exposure time, or
2. Use the SHUTTER signal from the camera to control a fast external shutter (such
as an LCD shutter) to block light during the frame-transfer readout cycle.