13 - 32 Symbol DS3478 Product Reference Guide
Clearing Transmission Buffer
To clear the transmission buffer, scan the Clear Buffer bar code b elow, which contains o nly a start character, a
dash (minus), and a stop character. The digital scanner issue s a short high-low-high beep and erases the
transmission buffer.
Transmitting Buffer
There are two methods to transmit the Code 39 buffer:
•
Scan the Transmit Buffer bar code , which includes only a start character, a plus (+), and a stop character.
The digital scanner transmits and clears the buffer, and issues a low-high beep.
•
Scan a Code 39 bar code with a leading character other than a space. The digital scanner appends the new
decode data to the buffered data, transmits and clears the buffer, and issues a low-high beep to signal that
the buffer was transmitted.
Overfilling Transmission Buffer
The Code 39 buffer holds 200 characters. If the sym bol just read overflows the transmission buffer, the digital
scanner issues three long high beeps to indicate it rejected the symbol, and no transmission occurs. The data in
the buffer is not affected.
Attempt to Transmit an Empty Buffer
If the symbol just read was the Transmit Buffer symbol and the Code 39 buf fer is empty, the digital scanne r issues
a short low-high-lo w be ep to sig nal th at the b uffer is empty, and no transmission occurs. The buffer remains empty.
Clear Buffer
NOTE Because the Clear Buffer bar code contains only the dash (minus) character, set the Code 39 length to
include length 1 before scanning this bar code.
Transmit Buffer
NOTE Because the Transmit Buffer bar code contains only a plus (+) character, set the Code 39 len gth to
include length 1 before scanning this bar code.