Transmit Buffer; Overfilling Transmission Buffer; Attempt To Transmit An Empty Buffer - Motorola LI4278 Product Reference Manual

11 - 34 LI4278 Product Reference Guide

Transmit Buffer

There are two methods to transmit the Code 39 buffer.
Scan the Transmit Buffer bar code below, which includes only a start character, a plus (+), and a stop
1.
character.
The linear imager scanner transmits and clears the buffer.
2.
•
The linear imager scanner issues a low/high beep.
Transmit Buffer
Scan a Code 39 bar code with a leading character other than a space.
3.
•
The linear imager scanner appends new decode data to buffered data.
•
The linear imager scanner transmits and clears the buffer.
•
The linear imager scanner signals that it transmitted the buffer with a low/high beep.
•
The linear imager scanner transmits and clears the buffer.
NOTE The Transmit Buffer contains only a plus (+) character. In order to scan this command, set Code 39
lengths to include length 1.

Overfilling Transmission Buffer

The Code 39 buffer holds 200 characters. If the symbol just read overflows the transmission buffer:
•
The linear imager scanner indicates that it rejected the symbol by issuing three long, high beeps.
•
No transmission occurs. The data in the buffer is not affected.

Attempt to Transmit an Empty Buffer

If you scan the Transmit Buffer symbol and the Code 39 buffer is empty:
•
A short low/high/low beep signals that the buffer is empty.
•
No transmission occurs.
•
The buffer remains empty.