IBM CF Series manual Gain Memory, NG Normalize Gain

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5.1.14.3 G : Gain Memory

Gain control allows light response equalization for each CCD photosite in the scanner. This is required because the amount of light transmitted through the lens is greatest in the center and tapers off towards the edges. Also, the response of individual photosites varies somewhat due to limitations in the manufacturing process. Each byte in the Gain Memory holds a corrective value for a corresponding photosite.

If you enter <D> and a <CR> for “Display”, the contents of the Gain Memory will displayed starting from address 0000. This memory contains 64K 8-bit words. They are displayed 320 at a time. To view the next 320, press <D> and <CR> again. To view the memory starting at an address other than 0000, enter D command followed immediately by the address. You do not need a <CR>, for example, “D2000”.

If you choose <F> for “Fill”, enter, separated by commas, the starting and ending memory locations, and the two-bit hexadecimal value you want to fill the memory. It will write over any values that are already there. You do not need to enter a <CR>. For example,“1000,2000,03”

Choice <M> runs a memory test. If no errors are found , the test indicates “OK”.Otherwise the test indicates “ERROR” and displays the addresses of the bad memory locations.

If you press <Z> to “Clear the Whole Memory”, the entire memory will be filled with zeroes.

If you enter <CTRL+E> the flash memory containing the gain values is erased. All memory locations are set to FF .

5.1.14.4NG : Normalize Gain

If you enter “NG” for “Normalize Gain”, the prompt “Target Pixel Value [E0]:” will appear. Enter “E0”and press <CR> or just press <CR>.

Next , the prompt “Clear Gain Memory [Y]” will appear. If you do not clear the memory, it will use whatever is there for the basis of the new normalization. Scangraphics recommends that you clear the memory before normalization.

The scanner then does a normalization pixel-by-pixel, calculating the gain values required to bring each pixel to the target.Upon completion, it beeps three times, and returns to Camera System Diagnostics Menu.

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Contents Firmware Rev. S27G and up Scanner Serial Number CF Series Scanner Maintenance ManualTrademark Notice Preface Related Scangraphics DocumentationIf You Have Questions Table of Contents Connections ON-BOARD Diagnostic System Diagnostics Tests Saving Parameter Changes to NON-VOLATILE Memories  System Overview Critical Calibration FeaturesMultiple Resolution User InterfaceConstruction DiagnosticsFunctional Specifications SpecificationsNominal Scan Speed/Resolution Chart Physical Specifications Input CharacteristicsPower Specifications Environmental Specifications This page intentionally left blank Installation Connections POWER-UP DE-INSTALLATION System Description Major Systems of Scanner Model # of Cameras Page Page This page intentionally left blank Monthly DailyAnnually Page CF Series Scanner Main Menu On-Board Diagnostic SystemPage This page intentionally left blank Global Parameters Menu Set Global ParametersPage Perform System Initialization Parameter BackupThis page intentionally left blank Set Motor Speed Menu Set Motor SpeedPage Splice Count Listing Example from a CF 1000/44 Splice CountsThis page intentionally left blank Focus and Magnification Menu Focus and MagnificationEquipment, Tools & Materials Required This page intentionally left blank Sample Focus Display FocusPage Page This page intentionally left blank Magnification Procedure for Adjusting Camera Magnification Magnification Values for CF300 This page intentionally left blank IP LUT For the Image Processor Board Example of an Image Processor Board Look-Up Table IP LUT 17 Merge and Splice Adjustment Menu Merge and Splice AdjustmentPage Page This page intentionally left blank Line Splice Adjustment Procedure for Adjusting Camera Merge Merge Adjustment24 Set Autosize Parameters Menu Autosize ParametersTest Frame Grabber B SET CCB Registers a26 I/O Board Test Menu Test I/O Board C27 I/O Board Sensor Test 28 Page Offsets Menu Offsets DThis page intentionally left blank 29 Camera System Statistics Camera System Diagnostics EPage NE Normalize Exposure NG Normalize Gain Gain MemoryFill Calibration Memory Display Calibration MemoryTake Line 14.12 L1 Lights On Video Board Reset Not used 14.11 L0 Lights OffTake Qualified Line AutotakeCalibration Check AAAA,DDTest Pattern Control Mirror ControlHistogram Camera Delay Factory Use onlyCalibration Memory Test Camera Response CurvesExit 31 Resolution Control Display Resolution ControlPage 32 Set Document Size Menu Document SizesCPU RAM RUN Self TestsRestore Nvram This page intentionally left blank Binary Filter Parameters Prompt Parameter Set A,B,C,D will appear IP Averager LUT Proceed With Calibration ? Y/N Autocalibration33 Scsi Buffer Parameters Menu Scsi Buffer ParametersThis page intentionally left blank Pixel Correction and Exposure Values Procedure for Issuing the Save CommandSystem Parameters Page Procedure to Remove Either Side Panel Procedure to Remove the Front CoverProcedure to Remove the Back Panel Procedure for Replacing Belt and Adjusting Tension Procedure for Installing and Replacing Imaging Lamp Procedure for Replacing White Background Task -- Replacement of White BackgroundProcedure for Removing and Replacing Camera Assembly Task - Camera Assembly Removal and ReplacementTask -- Camera Calibration Procedure for Adjusting Video BoardExposure Calibration Camera Board OffsetGain Calibration Volts Task - Checking and Adjusting Voltages+5 Volts +12 Volts+120 Volts Procedure for Replacing Fans Task - FAN ReplacementTask - Filter Cleaning and Replacement II. Save the Setup Terminal SetupIII. Host Serial Connection Appendix B Replacement Parts List