Voodoo User`s Manual V1.7
Contents
1. Disable Readout Progress prevents Voodoo from reading the current pixel count The current pixel count is the number of pixels that have been transferred to the host computer Show Commands will instruct Voodoo to display the details of every command as it is sent This will display the command header parameter and reply values for every command sent The format is as follows lt header gt lt command gt sargl gt lt arg2 gt lt arg3 gt lt arg4 gt lt argb gt lt argo gt gt lt reply gt The DSP Command window allows users to send both fixed and user defined commands to the controller and PCI board The fixed commands that can be sent are TDL Test Data Link RDM Read Memory and WRM Write Memory e Test Data Link Tests DSP communications by sending a specified data value to the specified board Timing Utility PCI The DSP board responds by sending the data value back to Voodoo e Read Memory Allows users to read memory locations on the specified board s DSP Timing Utility and PCI e Write Memory Allows users to write to any valid DSP memory location on the specified board Timing Utility and PCI e User Defined Commands These are 3 character ASCII commands that can be user defined in the controller DSP code or they can be one of the predefined commands such as IDL Idle array Example Reading the image dimensions on the controller can be done by sending RDM to the timing board The imag2. Expos DSP Commands Camera PTC _ Multiple Open Shutter J Disable Exposure Timeout _ Delay t P J Disable Readout Timeout T Open 5 GD Beep M Syntheti Frogram Debug Synthetic Image isable Readout Progress Image Mode Display O Show Commands Save To Disk c Program Files Astronort Image fit Auto Incr Exp Time sec O00 Time Remaining 0 Welcome To Yoodoo Read Progress Photon Transfer Curve PTC plots image signal level mean counts in ADU s against the variance in ADU s measured between pairs of flat field images of identical exposure times One of each pair serves as a flat field correction for the other image The conversion gain is also calculated and is determined from the following equation for total noise oe ox k N where c is the variance o the Poisson readout noise N the number of ADU s detected and 1 k the conversion gain in e ADU The variance is measured as the root mean square of the number of ADU s in the corrected image divided by v2 to account for the noise introduced by flat fielding The conversion gain is obtained from the slope of a linear least squares fit to the plotted data points full well turn over points are not included in the calculation The full well of the device s pixels is determined from the ADU value where the plot deviates from linear behavior PTC Win
3. E Idle Array Window Properties Beep Power On Global Options Window T _ Display Image Reset Controler Reset Controller Save To Disk Width 310 Height 320 Program Files 4stronon Reset Pcl Image fi Read Temp incenso Auto Incr Temp OC Controller Startup To automatically download a controller setup or parameter Exp Time sec 1 000 Il 43 file at startup fill inthe setup file path and name Time Remaining 0 Controller Setup File TestCamera setup amp Read Progress E 0 EE Controller Param File ITestCamera par E Welcome To Yoodoo Save Settings IMAGE BUFFERS Voodoo has default image buffer dimensions of 2200x2200 pixels This value can be customized for the duration of the program via the Image Buffers Window To have Voodoo automatically modify the image buffer dimensions at startup the user should save a Global Setup File VoodooChild curse after setting the desired dimensions e On Windows 2000 two values limit the maximum image buffer size that can be allocated by Voodoo 1 See the document Windows 2000 XP Device Driver DMA Limits for more info on Windows imposed memory limits 2 The device driver has a hard coded maximum image buffer size of 4200x4200 pixels This value can only be changed by modifying the device driver and re compiling 3 The device driver modifies the registry value VonPagedPoolSize to be approximately 35Mb which is
4. Loris Car soz bak Vi aS hOpCci solaris var Become superuser and run the install script ARSOLI Enter the PCI slot number when prompted For multiple boards continue to enter PCI slot numbers as prompted Hit return when finished To remove the driver use the unix command rem_drv astropci Linux Installation This driver has been tested under Redhat 7 2 kernel 2 4 2 2 and Redhat 9 0 kernel 2 4 20 8 It WILL NOT work with older kernels In order for this driver to function the following line must be set in LILO etc lilo conf append mem xxxM where xxx is the amount of RAM you DO NOT want to use for an image buffer So if your computer has 128Mb of RAM and you want to have a 28Mb image buffer you must have the following line in LILO etc lilo conf append mem 100M 1 Become superuser root 2 Edit etc lilo conf to have the append mem xxxM line image boot vmlinuz 2 4 2 2 label linux read only root dev hda5 append mem 100M dig From a ESSE amp xec te the commend Lilo y 4 Reboot the computer Create the directory xxx where you want to keep the driver files Copy the driver tar file to the new directory and unpack it gunzip astr rope X X xX ae OZ tar xvf asStr pci x x x tar Become superuser and run the install script astropci_loaqd IMPORTANT NOTE The Linux driver currently has no support for loading the driver at system startup So the astropci load script mus
5. 0 Utility Board Rev 3 0x20 Split Serial Readout options 0x1000 and Subarray is supported 0x400 0x20 0x1000 0x400 0x1420 Controller Parameters x Controller Parameters x Close Close Configuration Clock Driver Gain Video Offsets Reado Configuration Clock Driver Gain Video Offsets Readout Configuration Code 01420 Supported Capabilities Clock driver present ideo processor Rev 3B iming board Rev 48 eli ice LEFT RIGHT LEFTIRIGHT Split serial clocking L Split Serial Mo Split Parallel Ma Apply Ab Load Save Apply Ab Example 3 The Clock Driver Parameters window allows users to modify the array clock voltages A simple mistake here is to not select the correct board number The board number is determined by a set of jumpers on the clock driver board see diagram The Clock fields are labels for the user s convenience The minimum and maximum voltage values must be set before any other voltages can be sent to the controller Finally the M1 and M2 buttons determine which of the 24 clocks are associated with the two data signal inputs Board Number Jumpers 0 3 Jumper 2 is un jumpered so the board number is 0010 2 y 3240 RECANO Clock Driver Board CAMERA BUTTONS Voodoo has several buttons that allow direct control of certain camera functions These are primarily used for diagnostics except for Read Temperature
6. 11 Setting Shutter Position during an exposure Example Master equals timing board Controller Setup i Timing Board C Utility Board POTRA Reset Controller Hardware Test l Timing Board i File Application Filename tim lod ca Application Utility Board File C0 Application Filename util loc co Application le Power On Image Dimensions Cole 500 Rows 500 TARE CONTROLLER CONFIGURATION PARAMETERS The timing board DSP code on every controller contains a 24 bit word known as the Controller Configuration The bits of this word determine what hardware options are available These options are ONLY available after a timing board file or application has been downloaded on the controller Voodoo reads the controller configuration word by sending an RCC command to the timing board at the end of a controller setup sequence A tabbed window is then created based on the word bits Each tab pane corresponds to one of the available hardware options and allows parameters to be modified For the parameters to be sent to the timing board users must click Apply Above for each parameters tab they wish to modify This prevents unintentional modification of values that may potentially cause harm to the system NOTE If no configuration word exists the default values are used by Voodoo which are NONLINEAR TEMPERATURE CONVERSION TIMING BOARD REV4B UTILITY BOARD REV3 and SHU
7. E SYSTEM CurrentControlSet Control Session Manager Memory Management NonPagedPoolSize to be a value larger than the buffer you want to use DO NOT make the value more than 80 of your total RAM For example to set aside 32M of nonpaged memory set the value to 0x2000000 3 Reboot for changes to take affect REVISION COMPATIBILITY Software revisions are completely INCOMPATIBLE If Voodoo is upgraded from an older version to a newer one then all existing DSP code must also be upgraded to match the version number of the newer Voodoo All software DSP device driver and Voodoo are released together in one matching version Mixing code from different versions may have unpredictable results For example migrating from version 1 4 to 1 7 requires users to download Voodoo V1 7 device driver V1 7 and V1 7 PCI timing and utility files The PCI and timing boards must have their ROMs burned with the new code To aid in this process we supply two programs PciRomBurn and TimRomBurn PciRomBurn will allow users to burn new PCI code on the PCI EEPROM Similarly TimRomBurn will allow new timing board code to be burned IMPORTANT For all versions before 1 7 2003 all setup par and VoodooChild curse files must be tossed away and new ones generated These files are not compatible among revisions before 2003 versions of V1 7 APPLICATION STRUCTURE Voodoo consists of two layers the JAVA layer and the C library layer Voodoo s C library support
8. T GO GAD eA i aa i i SCARSE i paio mag SD EE 2 5 bm ia m DESCRIPTION OF VOODOO V1 7 FEATURES By Scott Strel June 27 2003 VOODOO INSTALLATION PROCEDURES AND ISSUES Voodoo requires a JAVA 2 runtime environment to function We currently use JDK1 3 To ease the installation process install scripts are provided for all operating systems The current scripts have greatly improved installation Solaris and Linux Installation e Make sure the PATH environment variable in your cshrc or login file contains the path to your JAVA 2 bin directory opt JDK_1 2 2_05 bin e Create a temporary directory and unpack the Voodoo files do not untar the voodoofiles tar file gunzip voodoo tar gz tar xvi voodoo tar e Become superuser and run the install script Install e Enter the directory where you want Voodoo installed The default is opt voodoo e Modify your cshrc or login to contain the following where install_dir is the directory where the Voodoo program files are installed and system is either unix or linux setenv LD_LIBRARY_PATH Sinstall_dir Voodoo Clib Ssystem lib setenv CLASSPATH Sinstall_dir Voodoo classes Sinstall_dir packages e To un install Voodoo just delete the directory where Voodoo was installed The default is opt voodoo Windows 2000 Installation e Create a temporary directory and unzip the Voodoo files e Run the file Setup exe e M
9. TTER available The file TIMHDR ASM contains the bit specification for the controller configuration and is as follows The bit is set 1 if the capability is supported by the controller BIT s FUNGI TON BIT s FUNCTION ZO Video Processor 11 Binning 000 CCD Rev 3 0 Not supported 001 CCD Gen I 1 Yes supported OTO IR Rev 4 ule ARCORE 12 Split Serial readout 4 3 Timing Board i ipse 00 Rev 4 Gen II di sal 13 Split Parallel readout 6 5 Utility Board 0 Not supported 00 No utility board 1 Yes supported opi Utility Rev 3 14 MPP Inverted parallel clocks 7 Shutter 0 Not supported 0 No shutter support 1 Yes supported l Yes shutter support 16 15 Clock Driver Board DFO Temperature readout 00 Rev 3 00 No temperature readout 11 No clock driver Gen I O1 Polynomial Diode calibration 10 Linear sensor calibration 19 18 17 Special implementations JO Subarray readout SL Somewhere cree 0 E T 001 Mount Laguna Observ 1 Toran en oer 010 NGST Aladdin Pp XXX Other The timing board DSP file contains default values for all available hardware configurations Voodoo allows users to modify these default values e IMPORTANT Modified values are not permanently saved on the timing board EEPROM and will need to be applied every time one of the following occurs Controller power is cycled The controller setup is applied and the Load Controller Parameters checkbox is not selected e To expedite this process Voodoo allows users to
10. ake sure your systems PATH environment variable contains the path to your JAVA 2 bin directory COR Leza2 00 Dai Installation Issues Despite the easy installation errors may still occur and the most common are 1 UNIX and LINUX users must manually set the CLASSPATH and LD_LIBRARY_PATH environment variables on their system Setting an incorrect path will result in the JAVA classes not being found setenv CLASSPATH opt voodoo Voodoo classes opt voodoo packages setenv LD_LIBRARY_PATH opt voodoo Voodoo Clib unix lib 2 LINUX users must remember to manually set aside image buffer RAM by editing etc lilo conf More on this later 3 My computer works fine with Version 1 4 but crashes now that I downloaded and installed the Version 1 7 driver and voodoo e The PCI and Timing board ROMS need to be upgraded This involves running PciRomBurn and TimRomBurn 4 I get an Error 31 after installing the Windows 2000 driver e The astropci sys file is in the wrong directory Move it from C WINNT to C WINNT System32 drivers 4 The result of running Voodoo on Windows 2000 is java Xrs Voodoo C Voodoo Voodoo ARCPNP1 gava lang IllegalArgumentException Signal already used by VM O EGIEN T at sun misc Signal handle Unknown Source at java lang Terminator setup Unknown Source at java lang Shutdown add Unknown Source at java lang Runtime addShutdownHook Unknown Source at sun awt windows WToolkit run Unknown Source
11. at java lang Thread run Unknown Source Try removing the Xrs from the voodoo bat file Or try changing ARCPNP1 to astropcil 6 When I run Voodoo I get an Unsatisfied Link Error e This means the path to Voodoo s C library is not set On UNIX and LINUX make sure you have the following defined in your cshrc file where install_dir is your installation path and system is either unix or linux setenv LD_LIBRARY_PATH Sinstall_dir Voodoo Clib Ssystem lib On Windows 2000 make sure your path environment variable contains the following Sinstali dir Voodoo Clib wanZ2k lab 7 When I run Voodoo I get CLASSPATH not found e This means the path to the Voodoo classes is not properly set On UNIX and LINUX make sure you have the following defined in your cshrc file where install_dir is your installation path setenv CLASSPATH Sinstall_dir Voodoo classes Sinstall_dir packages On Windows 2000 make sure you create an environment variable called CLASSPATH that contains the following Sinstall_dir Voodoo classes Sinstall_dir packages 8 I have SAOImage Ximtool DS9 installed but when I click Display Image nothing happens e You must have IRAF installed for this feature to work IRAF is not available for MS Windows DEVICE DRIVER INSTALLATION PROCEDURES AND ISSUES Solaris Installation Unpack the device driver files this will create a directory called astropciV1 7 or something similar gunzip ASt ro pel SO
12. dow The Start and End times are the exposure times for the first and last flat field images respectively The exposure time for the intermediate flat field images is determined by the Number of Points to be plotted Exposure Time End Time Start Time Number of Points 1 The dark image exposure time is set to 0 seconds The number of flat field exposures taken is just two times the specified Number of Points to be plotted If Save Images is checked then all images will be saved to the local directory These images can later be used to re generate the PTC plot by checking the Use Disk Images checkbox If Do Dark Image Only is checked no flat field images will be taken which is useful if you only want bias statistics The Subtract Darks checkbox causes two dark images to be taken and the average mean calculated instead of the mean for a single dark image The Flat and Dark settings specify the size of the images and the location on the images where the statistics will be calculated The Flat Dark Columns and Rows specify the size of the images in pixels The X and Y positions mark the lower left and upper right coordinates of the region on the image from where the statistics will be calculated This region can be anywhere within the image The Save and Load buttons allow all values and options to be saved and re loaded for reuse y Photon Transfer C
13. e columns are at Y 1 and the image rows are at Y 2 DSP Command Ox001 Ox00021C 0x002 0x000200 Example Reading the controller configuration word This requires sending the RCC command to the timing board No arguments This can be used to verify that the correct hardware options are available PCI TIM UTIL MANUAL Board PCL da Ti UTIL Command REC Argument 1 Argument 2 Argument 3 Argument 4 Send Command Reply 0x1 40 Synthetic Image Mode is used to verify image readout Selecting this Mode will cause the controller and in particular the timing board to generate a preset image on exposure This allows users to determine if the controller is properly reading out For example if no image or an incorrect image is returned from an array on expose then using synthetic image mode will allow users to know that there may be a problem with the array readout code Exposure time has no affect on the appearance of synthetic image The dimensions of the synthetic image will be equal to the set image dimensions Also the number of gradients will depend on the set image dimensions The larger the image the more gradients there will be It is important to note that this is a test of the controller and not the computer or Voodoo Also it is possible that your controller may not contain the DSP code required to generate the synthetic image BIE oodoo OR x Setup Parameters Subarra y FITS Exit
14. ion and you run Voodoo for extended periods of time you will eventually run out of RAM as the text string continues to grow gt Where is the FITS information such as date time etc stored In the header Yes that s correct gt In Video Offsets the default readout board setting is 0 What does this affect when changed You can have up to 16 video processor boards 32 channels Board 0 is the default and is the board number in single video processor board systems The video offsets affect the video signal by subtracting the user specified video offset from the analog video signal A and B represent the two channels A D per board See the CCD Video Processor manual on our website www astro cam com for more info gt How does Auto Scale on Voodoo s image viewer actually function is ita logarithmic representation for instance or some kind of 5 95 cutoff It s a linear scale with the minimum and maximum values used for the lower and upper values gt What does Select Area on Voodoo s image viewer do How do you get rid of the selected area box This is primarily meant for use by our observatory for auto focus You can remove the box by placing the mouse pointer over it and hitting delete on the keyboard gt What do the Min Max slider bars on Voodoo s image viewer do Are they brightness and contrast respectively What do the numbers mean No They represent the upper and lower values for the linear scaling
15. ions back to what they were before the subarray dimensions were applied Subarray Close O i Subarray Box width 200 Bias Position h oo B en Apply ox Height 100 Bias Width 20 Box col center 300 Box row center 400 Subarray Close cm C Subarray Cols Apply Rows FAQ Below is a list of common user questions gt What is the maximum number of multiple exposures that can be selected None In terms of the code the upper limit is about 2 billion gt What is the maximum delay that can be inputted None gt What are the maximum and minimum exposure times Minimum exposure time is 0 Maximum is limited by the controller s 24 bit input in milliseconds about 4 5 hours gt What does the de interlace Subtract feature do This feature is generally used by IR cameras But if selected the final image will be the result of subtracting the first rows 2 pixels from the remaining image buffer pixels In other words the upper half of the image buffer is subtracted from the lower half Generally for IR cameras the image buffer will consist of two images this is correlated double sampling for IR cameras gt In the Program menu what does Auto Clear Info Window do This option causes Voodoo to clear all the text in the info status window after every 2000 characters The info status window is the white text pane at the bottom of the main window If you don t use this opt
16. large enough to hold a 4200x4200 pixel image If this value exceeds 60 of your total RAM your machine may become unstable e LINUX users must manually set aside RAM for Voodoo to use This is accomplished by adding the line append mem 100M to the file etc lilo conf The 100M is the amount of RAM you do not want to use for an image buffer So this would allow a 28Mb image buffer on a 128Mb RAM machine Example 1 Become superuser root 2 Edit etc lilo conf to have the append mem xxxM line image boot vmlinuz 2 4 2 2 label linux read only root dev hda5 append mem 100M 3 From a tesh execute the command Lilo y 4 Reboot the computer DEBUG TOOLS Voodoo provides several debug tools These can be useful for diagnosing PCI controller and software errors Disable Read Elapsed Exp Time prevents Voodoo from sending commands to read the controllers elapsed exposure time This will not prevent Voodoo from reading the image it will only prevent reading of the elapsed time Disable Exposure Timeout prevents Voodoo from timing out if it cannot read the elapsed exposure time from the controller Disable Readout Timeout prevents Voodoo from timing out if the current pixel count cannot be read from the controller Voodoo will never come out of expose if this box is checked and the controller fails to finish image readout The current pixel count is the number of pixels that have been transferred to the host computer
17. lename All this information is saved in the current directory to a text file called VoodooChild curse by clicking the Save Settings button which is located on the G oba Settings window under the Program menu option Once this file has been saved every subsequent start of Voodoo from that same directory will cause the file to be read and all values reloaded e IMPORTANT ISSUES gt The controller setup file will be automatically downloaded to the controller The controller parameters file will not be automatically downloaded to the controller unless the Load Controller Parameters item is checked in the Controller Setup window Otherwise the parameters will be loaded into Voodoo but the user must manually apply the desired settings gt All VoodooChild curse files must be deleted and regenerated when switching Voodoo versions otherwise you are doomed to suffer incorrect parameter loading or even crashes This is only true for versions before 1 7 gt All VoodooChild curse files should be deleted or removed if Voodoo fails to start or behaves strangely during startup gt If a valid VoodooChild curse file exists Voodoo will reallocate the image buffer using the dimensions contained within that file BIE V oodoo Me Program Debug Setup Parameters Subarray FITS Exit Global Setup Camera Image Butters 5 Shut pen er About Yoodoo Global Setup x Clear Info indov SERIA IE Close
18. of the image ASTROPCI API C APPLICATION INTERFACE We offer a C API for users who wish to interface their own application or scripts to the device driver and controller The API is written in C and contains the basic device driver function calls which are the building blocks for all controller communications There are only 5 basic function calls one to read the PCI DSP command register HCTR one to write the PCI DSP command register one to read the PCI DSP status register HSTR one to write a vector command to the PCI board and one to write all regular ASCII commands The API also contains functions for reading array temperature deinterlacing images storing FITS files and loading PCI timing and utility DSP lod files The API is bundled into the following e UNIX static archive library a dynamic library so LINUX static archive library a dynamic library so e Windows 2000 static library lib Dynamic Linked Library dll The C API is supplied with a sample application called ap 7est It is a fully functioning text based program that exercises the entire API li APDpiy Controrlet Setup 2 Apply Controller Parameters 3 Expose 4 Let It Rip Do Options 1 2 3 With Defaults Dig EXIT Enter Option
19. s device driver level system calls because JAVA doesn t and any other operations which may be difficult or too slow with JAVA for example memory mapping of the image buffer While JAVA is platform independent the C system calls are not So the C library must be compiled separately on the supported operating systems Likewise the device driver is also system dependent While the underlying system calls and structure are different for the device drivers on the UNIX LINUX and Windows 2000 operating systems the interface between Voodoo and the device drivers is identical across all systems cos PN bee C Library Device Driver CONTROLLER SETUP The setup procedure follows the Setup Window components from top to bottom A minimal setup of the image dimensions must be applied before an exposure can be started Timing or Utility Who is Master The Setup Window allows users to designate either the Timing or Utility board as master The master board is the one that will control the exposure sequence The following commands are dependent on the master switch 1 OSH Open Shutter manually 2 CSH Close Shutter manually 3 PON PowerOn 4 POF Power Off 5 AEX Abort Exposure 6 PEX Pause Exposure 7 REX Resume Exposure 8 SEX Start Exposure 9 SET Set Exposure Time timing board only utility uses RDM WRM 10 RET Read Elapsed Time timing board only utility uses RDM WRM
20. save all parameters to the controller setup file which can later be reloaded by checking the Load Controller Parameters in the Setup window before applying the setup All non blank controller parameters are automatically saved in the controller setup file when that file is saved e It is important to note that the parameters only directly affect Voodoo in two minor ways which are The deinterlace option on Voodoo s Main Window may be changed For example selecting quad readout will automatically cause the deinterlace option to select quad deinterlacing The image dimensions in the Setup Window may be changed by some parameters Binning for example would do this Example 1 Utility Board Exists The controller returned 0x1A0 as the controller configuration The utility board support is found by masking 0x1A0 with 0x060 A utility board is supported if Ox1AO amp 0x060 0x020 And in this case it does Controller Parameters x Close fi l L l 1 O i i j ha 1 l 5 N Configuration Configuration Code Osc1 at ll Ox TAO amp 0x060 0x020 Supported Capabilities Clock driver present ideo processor Rey 3H iming board Rey 48 tility board Rey 3 Shutter control Nonlinear temperature conversion Apply Ab Example 2 The controller has returned 0x1420 which will cause Voodoo to create the tabbed parameter panes for a Clock Driver 0x0 Video Processor Rev 3B 0x0 Timing Board Rev 4B 0x
21. t be run after every system boot To unload the driver type Af ASTYOOCI Unload Windows 2000 Installation Unzip the device driver files IMPORTANT If you are re installing or upgrading the driver you must first delete the windows cached inf and pnf files During installation Windows stores its own copy of the driver which it will use the next time you try to re install To prevent Windows from using this old copy you must delete it before re installing or upgrading The files are generally called oem0 inf oem1 inf and oem0 pnf oemi pnf And can be found in C Windows inf Be sure to only delete the oem files that contain references to Astronomical Research Cameras Inc The Win2k driver supports Plug N Play So there are two methods for installation 1 Install the PCI board and startup the computer the new board should be detected and you will be prompted for the driver installation 2 From control panel choose Add New Hardware again you will be prompted for the driver installation 3 Reboot NOTE The driver install will modify the Windows registry to support a large image buffer This MUST be done The default amount of memory to set aside is 32M 0x2000000 If you want more memory you can modify it by doing the following WARNING Incorrectly modifying registry values can cause your machine to stop working 1 Run regedit from Start gt Run 2 In the registry modify HKEY LOCAL _MACHIN
22. urve Close start Time h 00 Save Images End Time h goj Do Dark Image Only Number OT Points _ Subtract Darks In this figure 7 points will be _ Use Disk Images plotted from 14 images of Plot Title Photon Transfer Curve 2048x2200 with points being Flat Settings generated from the calculations on the 350x400 pixel region Flat Columns 2200 _ 7 located at 350 500 800 900 Flat Rows 2046 The situation is similar for the dark image The flat image l exposures will start at 100 ms a and end at 1 sec with all Y 5o00 _ intermediate exposures being 212 ms 424 ms Dark Settings Dark Columns 2200 Dark Rows 2048 SUBARRAY Subarray allows a user to take a sub image from anywhere on the array The user specifies the size and position in pixels of the sub image See the figures below The box width and height specify the size of the sub image in pixels The box column center and the box row center specify the position on the array around which the sub image will be centered Bias position sets the offset of the bias region in columns from the left most array column column 0 Bias width sets the width of the bias region in pixels The full array option allows the user to set the image dimens
23. which is useful to camera users Open Shutter This button manually opens closes the shutter if one exists Clear Array This instructs the timing board to clear or destructively readout the array Idle Array The timing board continuously clocks the CCD if it s in idle mode This button will toggle idle mode on off Power On This turns the controller power on off This is here for diagnostic purposes Reset Controller This turns the controller power off and loads the DSP boot code from ROM This does not load any DSP application code Reset PCI This instructs the PCI board to reset its program counter PC back to its initial position thus restarting the DSP firmware on the PCI board Write To Disk This causes Voodoo to write the contents of the current image buffer to a FITS file The image dimensions will be those specified in the setup window How much of the image buffer is actually written to disk depends on the image dimensions specified in the setup window Read Temp This instructs the controller to return the current digital value that represents the arrays temperature Voodoo converts this digital value into a temperature value The conversion method used depends on the type of temperature sensor linear or non linear GLOBAL SETTING AND AUTOMATIC STARTUP Voodoo allows the user to save and automatically reload all window sizes exposure options image buffer size and the controller setup fi
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