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USER'S GUIDE
Any text sent to your PK-232 is queued into packets waiting for a successful connection be-
fore being sent. If the connect attempt fails, your system returns to Command Mode. The
system also automatically returns to Command Mode when either station disconnects and
ends the QSO.
5.4.1.
Converse Mode
Converse Mode is the data transfer mode most often used for ordinary conversations and
message handling. Your PK-232 assembles your typed data into packets and sends the da-
ta to the radio.
To return to Command Mode from Converse Mode type the Command Mode entry charac-
ter (default <CTRL-C>), or send a BREAK signal to the serial port.
Although "BREAK" is not a regular ASCII character, it can frequently be sent by typing a
special key on the keyboard. A BREAK signal is a continuous "mark" (or 1) signal on the
serial port's Transmit Data line lasting approximately 200 milliseconds. The timing of the
BREAK signal is not critical; most serial ports will recognize a BREAK if the "mark" signal
lasts significantly longer than the time required for transmission of a character.
Because the BREAK signal is simple, it's easy to generate a BREAK with circuitry outside
the computer, thus guaranteeing return to Command Mode in automatic station operation.
5.4.1.1.
SENDPAC Character
The "send-packet" character packetizes the typed characters for transmission. If you
type a full-length packet of characters (the default) value is 128 character) without typ-
ing the send-packet character, your input is packetized and sent after the 128
PACLEN
(
value) typed character.
Use the SENDPAC command to select a character for use as the "send-packet" com-
mand. "<CR>" is the default character. You can elect to include or not include the
send-packet character in the transmitted packet.
If "<CR>" is the send-packet character, it's natural to include it in the packet as part of
the text as well as interpreting <CR> as a command.
ACRPACK ON
o Set
If you use some other character to force packet transmission, you may want to set
ACRPACK OFF
5.4.1.2.
CANPAC Character
If you set the send-packet character to something other than <CR>, use the "cancel-
packet" character to cancel packets of more than one line.
Use the
CANPAC
Single-line packets can be canceled with either the cancel-line character or the cancel-
packet character.
PK232UG Rev. B 9/86
to send the <CR>.
and inhibit transmission of the send-Packet character.
command to select the cancel-packet character.
5-5
ADVANCED PACKET OPERATION
th
96
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