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USER'S GUIDE
AMTOR Mode A (ARQ) is the considered to be the most error-free method of HF radio-
gram message and text transmission available in the amateur radio service today.
o
Use AMTOR Mode A (ARQ - Automatic Request for Repetition) to answer another
station's CQ call, or to set up a synchronous, interactive link with error detection
and correction.
When used with EAS set ON, Mode A allows you to "see" the quality of the path, the cir-
cuit link and band conditions, to watch the flow of the data and accurately estimate the
"throughput" rate.
o
Use AMTOR Mode B (FEC) to call CQ and to transmit information to more than one
station at the same time ("round-table" mode).
We strongly urge that before operating AMTOR, you read APPENDIX E, written by J. Peter
Martinez, G3PLX, he "father" of AMTOR, and published in this manual with his permission.
4.1.5
Packet-Radio
Packet-Radio, one of the newest forms of communication, offers a major improvement in
reliability of text and data transmission. Your PK-232 uses the AX.25 Packet protocol.
AX.25 is based on the international protocols standardized throughout the telephone net-
works. It has been modified within our fraternity for use in amateur radio.
We'll discuss each of the operating modes separately in the following paragraphs.
For a more detailed discussion of appropriate amateur radio applications of ASCII, Bau-
dot/Murray and AMTOR RTTY codes, see Appendix G.
4.2
Morse Code Operation
From the Command Mode, type
mode. the PK-232 responds with the previous mode:
OPMODE
o
Type
X
o
Type
K
o
Type
<CTRL-D>
o
Type
<CTRL-C>
o
Type
R
4.2.1
Transmit/Receive Function Keys
From the Command Mode:
L
R
X
MO
PK232UG Rev. B 9/86
MORSE
was PACKET
to turn on your transmitter.
to enter the Converse Mode and begin the contact.
to shut off your transmitter and return to Command Mode or,
to return to the Command Mode.
to shut down your transmitter and end the contact.
Locks system to the speed of incoming signal.
Switches system to receive mode, unlocks receive speed, forces receive
speed to equal transmit speed.
Switches system to transmit mode.
Unlocks the Morse receive speed.
or
MO
followed by a
4-2
OPERATING MODES
<RETURN>
to enter the Morse
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