HandHeld Entertainment SV Series manual Adjusting Scanner Gain and Offset

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Adjusting Scanner Gain and Offset

Scanner gain and offset adjustment via commands is available in SV units that have the “A” circled on the label that indicates focus distance. The adjustment capability is useful for adapting the unit to various material types and scanning angles during the setup procedure. Knowledge of Hand Held Products’ ScanView software is required for best understanding of the following description.

When setting SV scanner gain and offset, use ScanView Reflectance Profile Mode as the guide to viewing signal levels. The object is to have at least 6 lines high of signal amplitude for the bar code(s) being verified. The bar code signal vertical placement (offset) should be within the yellow lines to ensure the signal is in the linear range. All other objects’ amplitudes and placements are not important. A picture of a “good” signal level is shown on page 5-11.

To adjust gain and offset settings, first use the ScanView Transmit SV Commands Screen to send a ~HT command to the SV unit. In the reply, look for the line that reads [DACs] = nnn nnn nnn nnn where nnn = numeric values. Example: a unit may read: [DACs] = 201 146 255 255. This indicates the current settings.

1.The 201 indicates the value of the gain setting. The higher the value, the higher the gain and therefore the higher the amplitude of the scan profile for a symbol. Max value is about 225.

2.The 146 value indicates the offset setting. The higher the value, the lower the symbol placement is offset on the graph.

3.The command ~Hd101nnn sets gain where nnn is the three digit value.

4.The command ~Hd201nnn sets offset where nnn is the three digit value.

5.Use these commands to set the desired signal amplitude ( ~Hd101nnn) and locate the signal vertical placement between the yellow lines ( ~Hd201nnn.)

6.A few iterations of commands will probably be needed, therefore it will be necessary to access the Transmit SV Commands Screen and Reflectance Profile Mode alternately.

Note: A short cut to the Reflectance Profile Mode is accessed by pressing F3.

7.Like most other SV commands – new scanner settings are enabled immediately when received, but to be stored to non-volatile memory so they are maintained on a power up condition, the ~Hx command must be transmitted after the desired settings are achieved.

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Quick Check® SV Series User’s Guide

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Contents User’s Guide Disclaimer FCC Class B Compliance Statement Statement of Agency ComplianceCanadian Notice SV Series Use with UL-listed Equipment Statement of RoHS ComplianceLaser Beam Laser Safety Enclosure DescriptionPage Table of Contents Scanner Setup ISO Parameter Grade Thresholds Technical Specifications Chapter a SV Series Setup Hints Scanning Distance and Angle Quick Check SV Series IntroductionLaser Beam SV Series Model SpecificationsScanView Software SV100Connector Reset ButtonControl Panel + 5 VDC Power Input Sync InputsIsolated Sync Input Diagram Edge Sync Mode Envelope Sync ModeCommunication Sync Commands Output PortsSystem Displays Power/Sync LEDIndicator LEDs 1 Calibration LEDSerial Port Pin-out Serial Port ConnectorSerial Port Specifications Serial Port Transmission FormatPos Chars Parameters + or indicating sign of avg. max. bar Symbology Identifier Table UPC-A Quick Check SV Series User’s Guide ScanView Software Installation ScanView Installation and SetupSystem Requirements PC Communication Port Setup Title Bar Screen Display Setup MenuSoftware Operation Warnings Menu Bar Screen DisplayMoving Codes Mode Select SymbologiesStatic Codes Mode Ladder Mode and Picket Fence ModeSupport Menu Advanced MenuAbout Menu Item Zoom Speed Button Bar Screen DisplayAll Data Points, Last 64 Data Points Erase Current Session DataSession Mode Notes Transmit SV CommandsSession Mode Modes Of OperationAnalysis Screens Reflectance Profile ModeBar Code Analysis Screen Bar Code Analysis Screen Bottom PanelGraph Display Area Bar Code Analysis Results for a Previous Bar CodeRight Panel Color Coding Reflectance Profile ScreenReflectance Profile Screen Scanner Setup Scanner Positioning Bar Code Travel Direction SV Scanner/Verifier Setup ProcedureBar Code Travel Speed Considerations Quick Check SV Series User’s Guide Quick Check SV Series User’s Guide Good Reflectance Profile Picket Fence Direction Bad Reflectance ProfileCalibration Picket Fence Bar Code Positioning SpecificationsSetting Ladder Mode Scanning Length Using ScanView Software Ladder DirectionProcedure Adjusting Scanner Gain and Offset Desired Signal Amplitude and Placement Quick Check SV Series User’s Guide SV Command Language Data Match Commands B~BCa##bc…bbb……mmm……bbb…… etc. up to 32 characters max Check for specific dataExamples ~ Brnbb .. + Define increment or decrement data checkIncrementing Examples Decrementing ExamplesDiagnostic Commands D Relationship Between ~BC and ~Br CommandsGet the Scan Rate Example return using ScanView Hardware Configuration Commands H~HB# Example return using ScanView inputted ~HB5 ~HO# Operational Mode~HQ# Transmission Mode Display the verifier parametersQuick Check SV Series User’s Guide ~Hdx01nnn Sets scanner gain or offset ~LA## Overall passing grade Label Setup Commands L~LD## Passing percent decode ~LFxy Analyze special subsymbology parameters ~LE#~LI# Include the specified symbology for a label ~LLQuick Check SV Series User’s Guide ~LQ# Enable or Disable Port Activations by Partial Decodes ~LS## Set minimum number of scans for valid read ~LT# Sync Input Source~LX# Sync Type ~LV## Output Interface Mode~LZ## Set Number of Codes per Label i.e., per sync period Output Mode Selection Commands O ~OS# Set Transmission Data Format~PBpiiaaabbb Port barcode decision block parameters Output Port Setup Commands PIDs Analysis Low High Units Parameters Value PCS ~PPpiiaaa Port action parameters IDs Description Low Value High ValuePort State PASS/FAIL Parameters ~PR#### Port/LED reset state Indicator Digit ValueSystem Control Commands S IndicatorHow to Set Up Single Scan Operation Checking SV Status with ~HTEnable Verification Execute the calibration procedureDisable Verification ~SK# Communication Sync~SN### Set the number of scans for Software Commanded Read ModeOperation Description Raster Check~Sh## Set the high target reflectance value for calibration Reset the System~Sl## Set the low target reflectance value for calibration ~Ssxy Command Example Data Transmission Example~Stx Command Example ~St5 Mode 00 ~LV00~Stx Program Command Indicator Header Output Interface Modes DescriptionsMode 01 I/O operation Mode 01 ~LV01Mode 01 LED Operation SV Commands Important to Mode Mode 02 ~LV02 Mode 02 I/O operationMode 02 LED Operation ~LV02~LQ0 Mode 12 ~LV12 Mode 03 ~LV03Mode 12 I/O operation Mode 12 LED Operation ~LV12~LDxx Mode 16 ~LV16 Mode 16 I/O operation~LV16 Mode 16 LED Operation~PP801xxx ~PB811xxxyyy Mode 17 ~LV17 OperationLED Operation SV Commands Important for Mode~LV17 ~PB815xxx000 Mode 18 ~LV18 LED Operation ~LV18 ~PB806xxx000 Mode 19 ~LV19 ~LV19 ~LDxx Mode 20 ~LV20 ISO Parameter Grade Thresholds Reference Decode Qcolvsv Series Product Specifications Technical SpecificationsParameter Specification Scanner Options PowerScanning Performance-SV Series Model SyncOperation Modes SymbologiesSync Mode Moving Bar Codes OutputsParameters Analyzed Sync Mode Stationary Bar CodesNo Sync Free Scan Operation Quick Check SV Series User’s Guide Quick Check SV Series User’s Guide Cleaning Maintenance/Customer SupportMaintenance Technical AssistanceJapan Product Service and RepairOnline Technical Assistance For Further Information MalaysiaLimited Warranty Online Product Service and Repair AssistanceQuick Check SV Series User’s Guide Setting the Proper Scan Distance Setting the Proper Scan Angle Session Mode Screen Showing the X Dimension MeasurementButton Example of Good Scan Profile Calibration Hints Examples of Scan Profile Parameters Out of RangeQuick Check SV Series User’s Guide Page Hand Held Products, Inc
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