C. Harper 7/9/01
1.
Connect
cables from the camera head to the Camera Electronics Unit, and from the host
computer to the Camera Electronics Unit via the A2S Converter box. See PXL User
Manual for instructions.
2.
We
are using a larger Melles Griot shutter instead of the shutter supplied by
Photometrics. The Melles Griot shutter is rated at 6v and is wired to plug into
the shutter control connector on the front of the camera.
3.
Modifying
the Melles Griot shutter to replace the Photometrics shutter: The black and
green connector wires are soldered to the two coil wires on the shutter. The
black and yellow connector wires must also be soldered together before going
into the coil. The Melles Griot shutter doesn’t have an over temperature device
attached to the coil like the Photometrics shutter. Connecting the yellow and
black wires together in place of the over temperature device creates a complete
circuit.
4.
Connect
the cooling unit to the camera.
1.
We
are using a modified version of “camtest” called “kcamtest”. It currently
resides at: /u/harper/pxl/PXL_keck/pxlsetup.lick and can be opened by:
harper@shoppe: /u/harper % camera.
It will eventually be installed on loel host.
“kcamtest” was modified for Keck and it will allow you to save images.
2.
Refer to the Photometrics Software Guide for Sun Workstations for
installation questions.
1.
All
hardware and the cooler must all be powered on before loading the PXL camera
program (see PXL Power Sequencing Procedure). First power on the cooler and
give it time to circulate cool coolant. Next turn on the Camera Electronics
Unit. The A2S and the host computer remain on at all times. Check to make sure
that the green light is on for both the A2S and CEU box. If the yellow light
stays on the A2S box and/or the red light comes on the CEU you will need to
troubleshoot these problems before continuing on.
2.
The
CCD must be cooled down to the setpoint temperature. It takes about 25 minutes
to cool down to the –25 C setpoint.
3.
To
load the “kcamtest” program:
harper@shoppe: /u/harper % camera
In the menu bar of “kcamtest” you may need to choose
camera, then open and pvcam2.
The current CCD temperature can be checked by
clicking the camera button in the
menu bar, then status.
A CCD temperature window will appear that displays the
updated CCD temperature. Wait until the CCD is
cooled all the way down before taking images.
4.
The
Camtest window will come up with 5 menu options: File, Edit, View, Camera and Exposure.
5.
Check
the exposure time by clicking on the Exposure
menu, then Setup. The default
value is 100 ms.
6.
Take
an exposure by clicking on Exposure,
then Single. The image will appear in
the Camtest window and a readout time will appear at the bottom of the window.
7.
Save
an image by clicking on File, then Save As and enter the file name with
.fits, then OK.
i.e. /u/harper/file name.fits
8.
Open a file by clicking on File, then Open and go to the top level directory in the Filter box:
/u/harper/*.fits
Hit return while the cursor is in the Filter Box and
at the end of the path. Then highlight the desired file and hit OK. The image will now be displayed. Or
enter the path in the Selection box then hit OK. The pixel count is displayed in the bottom left corner. Moving
the cursor will change the pixel count.
9.
Close
“kcamtest” before powering down the CEU and the camera. Use File, then quit to exit the program.
Other
areas that you may want to check or change:
View - Setup for grey scale values and to restrict the range. This will
display the minimum and maximum values.
Camera -
Open is used only when using multiple cameras
- Setup will show the temperature setpoint and the delay
time that it takes to open the shutter after the signal is given. This may need
to be adjusted for each shutter.
- Status displays the CCD temperature
- CCS State for halt, etc. with the shutter
Exposure - Single for one exposure
- Continuous for multiple exposures. This can be used to
debug shutter problems
- Setup defines readout window and how many pixels you want
to read.
-Set Bin
to 4x4 to set focus. The focus can be adjusted while taking exposures. Bin is normally set to 1x1 for full
resolution.
-
The
original “kcamtest” program is limited to 15 bits. You must keep the images
below half scale (32K) or they will wash out. There is a revised “kcamtest”
program that can handle 16 bits. Bob Kibrick will be installing it on Shoppe.
-
Use
“kill –9 (process number)” to stop a program. % ps will display the process
number. Use this if the program locks up and restart the program.
-
If
the CCD doesn’t cool down to –25 C check the cooler hoses to make sure that
they aren’t crimped and impeding the coolant flow. The tubes shouldn’t be
hanging over the table edge without strain relief.
-
Sequencing
is important. First turn on the cooler and give it time to start circulating
cool coolant. Next turn on the Camera Electronics Unit. The A2S converter and
the host computer are always on. “kcamtest” won’t load if there is a yellow
light on the A2S box or a red light on the CEU.
-
If
a yellow light comes on the A2S Converter box check the coolant tubes,
connectors and reboot Shoppe. This light should go out after a short power up
self diagnostic is run. If it stays on it indicates an internal problem in the
A2S unit.
-
“PVCAM
Fatal Error in init_data_structures: this driver is already in use by another
user” error message may occur while trying to load “kcamtest”. The driver
wasn’t released when the program was last closed. Try rebooting Shoppe or
“super reload-driver”.
-
Shoppe
is very slow, give it lots of time.
-
Cam_open_cb:
Can NOT open new camera, pd_cam_open:errno = 6 indicates a SCSI problem, not a
camera problem. Check:
-run “probe-scsi-all” to see if the host computer is recognizing the SCSI bus that the camera is on.
-use a slow narrow SCSI board. Fast wide SCSI board
may be too fast for the slower PXL A2S’s SCSI board.
-use an isolated SCSI bus.
-try “boot –r” to reconfigure the host computer’s
device maps.
-Check camtest software and PXL driver configuration
by using the following procedure for getting a PXL camera to operate on a SCSI
bus other than SCSI bus number 0, then reboot host computer again.
The
specific procedure, as derived from Myrna's 1999 Jon Chalk e-mail is:
A.
The pxl.conf file in /usr/kernel/drv on shoppe was edited to:
name="pxl" class="scsi"
target=5 lun=1;
Previously, the value of the "lun" parameter had been a 0.
B.
Shoppe was rebooted with a 'reboot -r' while the PXL camera was
on
an connected with the older, slower SCSI board in SCSI bus
number 1.
C.
The following logical link was manually created in the /dev
directory:
pvcam2
-> /devices/iommu@0,10000000/sbus@0,10001000/esp@2,200000/pxl@5,1:4
-refer to Keck’s PXL Troubleshooting Procedure at:
http://www.keck.hawaii.edu:8080/electronics/operations/PXL/Troubleshooting.html