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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