MFJ-464 Instruction Manual CW Keyer/Reader
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O# Output – enables (#=Y) or disables (#=N) the keying output, or toggles the keying
output on or off without the #. If the output is turned off, no signal goes to the
Keying Output or the PTT Output to allow practice operation. The output is
temporarily disabled during memory message storing, command mode operation,
status information, and keyer setup.
To change Output mode type “~O” followed by “Y’ for on, “N” for off, or ENTER to
toggle. The keyer will respond with “ON” or “OFF”. Press ESC or any other key to
cancel and exit.
P# Paddle – selects paddle mode of automatic (#=A), semi-automatic (bug, #=S) or
hand-key (#=H) mode. With the automatic option, the keyer functions as an iambic
keyer for use with a dual-lever paddle. As an iambic keyer, the MFJ-464 has dot and
dash memories for "squeeze keying" and functions just like other iambic keyers, both
standalone keyers and those built into radios. With semi-auto, the keyer can be used
with a single-lever key, with dots generated automatically and dashes formed
manually by the user. This emulates the function of a mechanical semi-automatic
"bug." You also may use this unit with a straight key or a bug, connect the straight
key or bug to the ground and the dash line. With the hand-key option, both the dot
and dash lines can be used to connect to a straight key. Notice hand-key mode may
not be used to enter messages or commands.
Note: In hand-key mode using the paddle, the MFJ-464 will not display the code
sent or record to the keyer memory. Also, the difference between this and
the Hand-key command is that this command affects the paddle only.
Q# Queue – enables (#=Y) or disables (#=N) the message queue, or toggles the message
queue on or off without the #. Queue mode enables the user to load messages into a
buffer to play sequentially. In queue mode, if you press a message button while a
message is playing, that message will play after the current message is done. When
queue mode is off, pressing a message button will abort any message being played
and play the new message. When on, up to eight button presses are stored in order
and acted upon in succession as each message is completed.
To change Queue mode type “~Q” followed by “Y” for on, “N” for off, or ENTER to
toggle. The keyer will respond with “ON” or “OFF”. Press ESC or any other key to
cancel and exit.
Note: Disabling the queue mode increases the message stack size to seven levels
deep used by the embedded Call command.
S## Speed – sets the overall code speed to ## WPM, where ## represents two digits in the
range of 05 to 99. By "overall" speed, we mean the speed at which the words or
groups are sent. A "word" is defined as 50 units of time, and the word "PARIS" is
exactly 50 units in length. Therefore, if "PARIS" is sent 13 times in one minute, the
sending speed is 13 wpm.
Standard Morse code timing defines a dit as one unit of time and a dah as three units
of time. Within each character, there is one unit between elements (dits and dahs).
Three units separate characters and seven units separate words. Farnsworth spacing
(see above) will increase the amount of time between characters and words. Note that
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