23–2 
Serial Program Mode  
For Serial Program Mode, all commands must be framed by an STX (02 Hex) 
and ETX (03 Hex). 
To recall defaults: 
1.  Transmit <STX>999999<ETX> through the Serial Port. This will put the 
scanner in serial program mode. Scanning will be suspended and the 
scanner will respond with an ACK (06 Hex). 
 
2.  Transmit <STX>999998<ETX> through the Serial Port. This is the Recall 
Defaults bar code in the MetroSelect guide. The scanner will respond with 
an ACK (06 Hex). 
 
3.  Transmit <STX>999999<ETX> through the Serial Port. This will cause the 
scanner to exit program mode and save the new settings. The scanner will 
beep 3 times and send an ACK (06 Hex). 
If at anytime, the scanner cannot recognize a command, it will respond with a 
NAK (15 Hex).