User manual SYMBOL LS1900

[. . . ] LS1900 Series Product Reference Guide LS1900 Series Product Reference Guide 72-50930-01 Revision A June 2001 © 2001 by Symbol Technologies, Inc. No part of this publication may be reproduced or used in any form, or by any electrical or mechanical means, without permission in writing from Symbol. This includes electronic or mechanical means, such as photocopying, recording, or information storage and retrieval systems. All software, including firmware, furnished to the user is on a licensed basis. [. . . ] If you get an error beep when enabling Trioptic Code 39, disable Code 39 Full ASCII and try again. 4-72 Programming the Scanner Convert Code 39 to Code 32 Scan the appropriate bar code below to enable or disable converting Code 39 to Code 32. Note: Code 39 must be enabled in order for this parameter to function. Enable Convert Code 39 to Code 32 *Disable Convert Code 39 to Code 32 4-73 LS1900 Series Product Reference Guide Code 32 Prefix Scan the appropriate bar code below to enable or disable adding the prefix character "A" to all Code 32 bar codes. Note: Convert Code 39 to Code 32 must be enabled for this parameter to function. Enable Code 32 Prefix *Disable Code 32 Prefix 4-74 Programming the Scanner Set Lengths for Code 39 Lengths for Code 39 may be set for any length, one or two discrete lengths, or lengths within a specific range. The length of a code refers to the number of characters (i. e. , human readable characters), including check digit(s) the code contains. If Code 39 Full ASCII is enabled, Length Within a Range or Any Length are the preferred options. One Discrete Length - This option allows you to decode only those codes containing a selected length. For example, if you select Code 39 One Discrete Length, then scan 1, 4, only Code 39 symbols containing 14 characters are decoded. If you make an error or wish to change your selection, scan CANCEL on page 4-121. Code 39 - One Discrete Length Two Discrete Lengths - This option allows you to decode only those codes containing two selected lengths. For example, if you select Code 39 Two Discrete Lengths, then scan 0, 2, 1, 4, only Code 39 symbols containing 2 or 14 characters are decoded. If you make an error or wish to change your selection, scan CANCEL on page 4-121. Code 39 - Two Discrete Lengths 4-75 LS1900 Series Product Reference Guide Set Lengths for Code 39 (continued) Length Within Range - This option allows you to decode a code type within a specified range. For example, to decode Code 39 symbols containing between 4 and 12 characters, first scan Code 39 Length Within Range. Then scan 0, 4, 1, and 2 (single digit numbers must always be preceded by a leading zero). If you make an error or wish to change your selection, scan CANCEL on page 4-121. Code 39 - Length Within Range Any Length - Scanning this option allows you to decode Code 39 symbols containing any number of characters. Code 39 - Any Length 4-76 Programming the Scanner Code 39 Check Digit Verification When enabled, this parameter checks the integrity of a Code 39 symbol to ensure it complies with specified algorithms. Only those Code 39 symbols which include a modulo 43 check digit are decoded when this parameter is enabled. Enable Code 39 Check Digit *Disable Code 39 Check Digit 4-77 LS1900 Series Product Reference Guide Transmit Code 39 Check Digit Scan a bar code below to transmit data with or without the check digit. Transmit Code 39 Check Digit (Enable) *Do Not Transmit Code 39 Check Digit (Disable) 4-78 Programming the Scanner Enable/Disable Code 39 Full ASCII To enable or disable Code 39 Full ASCII, scan the appropriate bar code below. When enabled, the ASCII character set assigns a code to letters, punctuation marks, numerals, and most control keystrokes on the keyboard. The first 32 codes are non-printable and are assigned to keyboard control characters such as BACKSPACE and RETURN. The other 96 are called printable codes because all but SPACE and DELETE produce visible characters. Code 39 Full ASCII interprets the bar code special character ($ + % /) preceding a Code 39 character and assigns an ASCII character value to the pair. For example, when Code 39 Full ASCII is enabled and a +B is scanned, it is interpreted as b, %J as ?, and $H emulates the keystroke BACKSPACE. The scanner does not autodiscriminate between Code 39 and Code 39 Full ASCII. Enable Code 39 Full ASCII *Disable Code 39 Full ASCII Note: Trioptic Code 39 and Code 39 Full ASCII cannot be enabled simultaneously. If you get an error beep when enabling Trioptic Code 39, disable Code 39 Full ASCII and try again. 4-79 LS1900 Series Product Reference Guide Code 39 Buffering (Scan & Store) When you select the Scan and Store option (Buffer Code 39), all Code 39 symbols having a leading space as a first character are temporarily buffered in the unit to be transmitted later. Decode of a valid Code 39 symbol with no leading space causes transmission in sequence of all buffered data in a first-in first-out format, plus transmission of the "triggering" symbol. [. . . ] The narrowest element dimension which is distinguished by a particular reading device or printed with a particular device or method. An electronic device used to scan bar code symbols and produce a digitized pattern that corresponds to the bars and spaces of the symbol. Photodetector - registers the difference in reflected light (more light reflected from spaces). Signal conditioning circuit - transforms optical detector output into a digitized bar pattern. [. . . ]