MFJ MFJ-1270C, Системное руководство

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MFJ-1270C/1274C MANUAL ADVANCED OPERATION
Page 54
If you initiate the connection with the CONNECT command, you can control
the timing of the mode change with the command NEWMODE . If
NEWMODE is OFF , the mode will change when the connect ACK is received
and the
*** CONNECTED TO: <callsign> message is typed. If NEWMODE
is ON , you will enter data- transfer mode immediately, without
waiting for a successful connection. Any text sent to the MFJ TNC at this point
will be queued up in packets which will wait for a successful connection before
being sent. If the connect attempt fails, you will be returned to Command Mode.
You will also be returned automatically to Command Mode when either station
disconnects and ends the QSO.
Converse Mode
The data mode used most often for ordinary QSOs is Converse Mode. In
Converse Mode, the information you type is assembled by the MFJ TNC into
packets and transmitted over the radio. The send-packet character causes the
input to be packetized for transmission. If you type a full packet- length of
characters without typing the send-packet character, your input will be
packetized and transmitted anyway.
The default send-packet character is <CR>, but you can specify any character
with the command
SENDPAC . You may also choose to have the send-packet
character transmitted in the packet or not. If the send-packet character is <CR>
it is natural to include it in the packet as part of the text as well as interpreting it
as a command. This is accomplished by setting
CR ON . If you use some other
character to force packet transmission, you may want to set CR OFF and inhibit
transmission of the send-packet character. If you set the send-packet character to
something other than <CR>, you can cancel packets of more than one line with
the cancel-packet character, which is set with the command
CANPAC . Single-
line packets can be canceled with either the cancel-line character or the cancel-
packet character.
To return to Command Mode from Converse Mode you must type the Command
Mode entry character, or send a BREAK signal over the serial port. A BREAK
is not a regular ASCII character, but it can frequently be transmitted by typing a
special key on the keyboard.
A BREAK signal is a continuous space (or 0) signal on the serial port Transmit
Data line lasting approximately 0.2 second. In fact, the timing of the signal is