Epson MFJ-1278B manual Parity and Word Length, Echos, Parity 1 or Parity

MFJ-1278B MULTI-MODE BASIC OPERATION

Parity and Word Length

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

Echos

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