From CCDSH
Troubleshooting: OCELOT
- Problem: it is possible that the
ixon-server
cannot be started due to a lock file present in/tmp
, however the server is not running. This could happen after a power failure or other malfunction, e.g. a crash of theixon-server
. Solution: If you are absolutely sure that the server is not running, delete this file.
- Problem: After a shutdown/power failure, the shutter parameters might be reset. During exposures the shutter will not open, resulting in dark frames. This can be tested e.g. by trying to obtain flat field frames. Solution: To set the correct shutter parameters, first disconnect from the camera on
m16
, and exit the GUI. Then stop theixon-server
via telnet:
telnet localhost 32768
After connecting to the server, the command shutdown
stops the server itself. The connection can be terminated by closeconn
.
After stopping the ixon-server
, the correct parameters can be set by
root@emccdrcc:~# serial -c /dev/ttyUSB0 -b 38400 SCSONT 70 SCSOFFT 100
Exit with Ctrl-D
. Restart the ixon-server
that was probably running in screen
:
screen -r ixon-server /usr/local/etc/ixon-server/ixon-server.cfg
Leave the screen by pressing Ctrl-A-D
. Do this only, if you are absolutely sure that the shutter is causing the problem! Check all other obvious possible problems:
- The dome is open
- The dome and the telescope are looking in the same direction
- Tube and mirror covers are open
- Both filter wheels are in correct position
- Problem: The
ixon-gui
is not responding, and after restarting it, it cannot connect, and theixon-server
cannot be stopped via telnet. It can happen after really long observing blocks. Solution: You have tokill -9
theixon-server
process, and restart it.