Motorola Phaser P460 Instructions d'exploitation télécharger pdf (Page 149)

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P460/P360 Memory Scanners Product Reference Guide

Transmit Symbols in Codeword Format

Enabling this activates transmission of each PDF symbol as directly decoded data

codewords, whether that symbol is part of a macro PDF sequence or not. Note that data is

output as codeword values — not as interpreted data.

“Codeword values” is an ASCII representation of a number from 000 to 928 for each

codeword, preceded by an escape character. This escape character is a backslash by

default, but the user may change this value. For example, the codeword value 005 is sent

to the host in the form of \005 for GLIs, and \C005C for ECIs. This output format is based

on the AIM USA Uniform Symbology Specification for PDF417 (1994).

All output codewords take up exactly 4 characters for GLIs and 6 characters for ECIs.

However, there may be nondecodable characters in the PDF symbol, such as a GLI

sequence. This special codeword sequence activates a certain kind of interpretation to the

encoded data. Non-decodable codewords like GLIs are embedded in the output stream just

like any other codeword, e.g., \927\001.

Because GLIs are indistinguishable from other codewords in the output data stream, the

host must intelligently recognize them as GLIs and process their interpretations.

Note that when a macro PDF sequence is transmitted, the last character in the last block

of data transmitted is always \922 (if selected). This indicates the end of that macro PDF

transmission.

Enable Transmit In Codeword Format

Disable Transmit In Codeword Format

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Motorola Phaser P460 Instructions d'exploitation Page 149