Epson Multi-mode Data Controller MFJ-1278B Benutzerhandbuch

If you are using one of the optional MFJ Starter Packs, then you should follow the 
instructions given by the terminal program documentation with the starter pack.  If you are 
not using one of the MFJ starter packs, then you should use the following instructions to set 
the parity and word length for the MFJ-1278B. 
 
If messages from the MFJ-1278B appear garbled, with incorrectly displayed characters, you 
may need to change the MFJ-1278B's serial port parity and word length.  There could also be 
a problem with the terminal baudrate.  See Chapter 2 if the baud rate needs to be changed.  
The MFJ-1278B's default value is 8 bits and no parity.  If your computer receives 8 bits as 
data, you may have to set space parity, since text may otherwise be interpreted as graphics or 
other special characters.  The  Awlen  and  Parity  commands set the word length and parity, 
respectively.  To set the wordlength to 8 bits, and parity to NONE, use the following 
combination: 

AWLEN 8  (8-bit words) 
PARITY 0  (no parity bit) 

For setting a wordlength of 7 bits, and even parity, set 

AWLEN 7  (7-bit words) 
PARITY 3  (even parity) 

One of these combinations will satisfy most computers.  You are more likely to require a 
different setting if you have a terminal rather than a computer, or if you have configured your 
terminal port for some special application. 
 
If your computer requires odd parity, set  PARITY 1.  If your computer detects framing 
errors, try setting 

AWLEN 7  (7-bit words) 
PARITY 0  (no parity bit) 

for shorter characters.  For longer characters, set: 

AWLEN 8  (8-bit words) 
PARITY 1 or PARITY 3 

You may see two characters on your screen for every character you type, for example: 

cmd:  RREESSEETT 

Your computer is echoing the characters you type, and the MFJ-1278B is also echoing them.  
In this case, set duplex  to  FULL on your terminal to stop the terminal from echoing