Reference Guide

Symbologies 4 - 39
Clear Buffer
NOTE The Clear Buffer contains only the dash (minus) character. In order to scan this command, set Code
39 lengths to include length 1.
Transmit Buffer
There are two methods to transmit the Code 39 buffer.
1. Scan the Transmit Buffer bar code below, which includes only a start character, a plus (+), and a stop
character.
2. The barcode scanner transmits and clears the buffer.
• The barcode scanner issues a low/high beep.
Transmit Buffer
3. Scan a Code 39 bar code with a leading character other than a space.
• The barcode scanner appends new decode data to buffered data.
• The barcode scanner transmits and clears the buffer.
• The barcode scanner signals that it transmitted the buffer with a low/high beep.
• The barcode 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 barcode 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.