Hand Held Products IT4800 Manuel D’Utilisation

The encoded message is the information (alpha, numeric, and/or control char-
acters) or message contained within the bar code symbol and output as part of 
the decoding process.  This information precedes the calculated PQA parame-
ters.  This information must be manually compared to the characters that should 
be encoded.

Error Correction is a reader/decoder’s use of mathematical processes to recon-
struct or replace damaged or missing symbol characters.  Error correction char-
acters are specific symbol characters that are created automatically from the 
other symbol data characters and used for error correction and detection.

Error Correction Level is an indication of the number of characters used in a 
symbology for the purpose of error correction.  Higher levels of error correction 
allow for correcting greater potential symbol damage.

Error Detection is the use of error correction characters (symbol characters that 
are reserved for error detection and calculated automatically from the other 
symbol characters) to detect whether the presence of errors in the symbol 
exceeds the error correction capacity.  Error detection will keep the symbol from 
being decoded as erroneous data.