![]() Code 39 is typically not used with a check character and is thus one of the barcodes that you will be able to use easily without an Encoder. This character is also called the start/stop character. If you have a need for using barcodes in your organization and do not want to get into the details, Code 39 is one of the recommended barcodes.Ĭode 39 barcodes begin and end with the '*' character. It supports alphanumeric characters and is used in a wide variety of applications. It is a variable length barcode, which means that you will be able to encode any number of characters in the barcode. If the barcode reader were not using Full ASCII translation, no translation would be performed, and the characters "+" and "A" would be transmitted instead.Code 39 is one of the earliest and most widely used barcode. In this example, the barcode reader, which must be in Full ASCII mode, decodes the plus sign, and then, rather than transmitting it, scans the next barcode character symbol (in this case, a capital "A") and performs a Full ASCII conversion to then transmit the lowercase "a". So, to print the letter "a", you would create a barcode that uses "+A". In other words, you can encode any of the ASCII standard (not extended) characters and the ASCII control characters into a barcode, as illustrated in the following table from the ISO/IEC standard.įor example, to create lowercase letters, you use the barcode symbol for a plus sign (+) followed immediately by the barcode symbol for the uppercase version of the letter. However, Code 39 - Full ASCII uses special two-character combinations from the 43-character set to allow for the representation of all 128 ASCII characters. ![]() The start and stop characters are not transmitted as part of the barcode and are not included in any check digit calculations.Ĭode 39 - Regular and Code 39 - Full ASCII support the same 43-character set and the same start and stop characters. This character is commonly designated as an asterisk, but you can choose to have no start and stop characters at all or choose to let the data source specify either the start character or the stop character or both. ![]() Intercharacter spaces (one module wide) that separate characters within the symbolĮach Code 39 - Full ASCII data character is represented by nine elements: five bars and four spaces, three of which are wide and six narrow.Ĭode 39 start and stop characters are used at the beginning and the end of the barcode message to signal a barcode reader that a Code 39 barcode has been scanned. One or more pairs of symbol characters that represent data (including an optional check digit) ![]() The symbol comprises the following elements: ![]()
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