ICIMACS for DANDICAM: Software Notes

3/24/00 : JAM


Instrument Names

During instrument debugging, the IC or IR may report their instrument name as "ANDICAM". The INST command must then be used to correct this:

INST dandicam

Then the WC must be forced to query the IC and IR for their instrument name:

>IC STATUS

>IR STATUS

Then run STARTUP on prospero.


Disk Synchronization

Users occasionally note that they are having difficulty getting the data disks between the WC and IC or IR to synchronize on startup (symptom: prospero reports "-Synch" in its status screen and reports errors after running startup). If full reboots are not solving the problem, you can attempt to force synchronization of the disks manually: Check the WC status screen. Near the middle of the screen is a box with disk synchronization information. If any of the machines' names are followed by the word "-SYNCH", follow the directions below.

CB -SYNCH:
Make sure that caliban is running on the sparc station, then type

>WC REQ INITDISK

in the caliban console window.

IC -SYNCH:
On the WC keyboard, type

>IC REQ INITDISK

IR -SYNCH:
On the WC keyboard, type

>IR REQ INITDISK

Note: If the instructions above don't help, then it may be the case that the WC was not able to detect the IC or IR disks on startup. The only fix for this is to turn the WC off and then back on again. If even this fails, turn the power off on all three PCs (WC,IR and IC) and turn them all back on again at the same time.


Readout Amplifier(s) Selection

ICIMACS supports 6 readout modes of the 3 working amplifiers on the CCD in DANDICAM: readout of the entire device through amplifiers BL,AL or AR, or through any two of these amplifiers to reduce the readout time. Selection of the amplifer(s) used is through the READOUT command:

READOUT ar
selects the AR amplifier

READOUT bl
selects the BL amplifier

READOUT al
selects the AL amplifier

READOUT arl
use both the AR and AL amplifier
READOUT arbl
use both the AR and BL amplifier
READOUT albl
use both the AL and BL amplifier
In addition, there is a "crippled" mode that reads out through all four amplifiers for the fastest readout time, if you don't mind the dead quadrant in your data:
READOUT arlbrl
use all four amplifiers

Focus Frames

A primitive method for producing focus frames is now included in the ANDICAM IC code. The example below produces a multiple exposure of six images of the same star at six different focus settings:
Acquire a bright star

Set the starting focus

Select image type FOCUS using the FOCUS command and give the object name:
FOCUS a bright star

Set the exposure time to be used for each exposure:
EXP n

Enter the filename to be used for the resulting image:
FILENAME ccdfocus.001

Start readout mode and erase the CCD:
GO

Open the shutter and take the first exposure:
SHOPEN

Offset the telescope to move the star

Change the focus setting

Open the shutter and take the next exposure:
SHOPEN

Offset the telescope to move the star

Change the focus setting

Open the shutter and take the next exposure:
SHOPEN

Offset the telescope to move the star

Change the focus setting

Open the shutter and take the next exposure:
SHOPEN

Offset the telescope to move the star

Change the focus setting

Open the shutter and take the next exposure:
SHOPEN

Offset the telescope to move the star

Change the focus setting

Open the shutter and take the next exposure:
SHOPEN

Readout the array and save the image to the current mount point:
RESUME

Region-of-Interest

The ROI command allows for a sub-section of the total detector to be read out, decreasing the readout time. The region selected must be centered on the middle point of the detector, row 1040, column 1024. If a region selected is not symmetric around the centerpoint of the CCD, the program will automatically increase the size of the region in the "short" direction until the region is symmetric. In addition, if the number of pixels selected is not an even multiple of the binning factor, then overscan will be added in the proper axis until the number of pixels is a multiple of the binning factor.
Select a region of interest:
ROI x1 x2 y1 y2
Turn on ROI readout:
ROI ON
Select whether you want to do erase cycles between readouts or not:
ROICLEAN ON/OFF
Turn off ROI readout and go back to full-device readout:
ROI OFF

Imaging Sciences Laboratory
Revised: March 24, 2000 [jam]