MFJ-493 Instruction Manual
9
Serial Number Decrement
Use Serial Number Decrement to decrement the current serial number by one. The unit will echo a
"D" for every number that is decremented. If you decrement down from zero you will get 9999 for
your serial number. When a message plays 9999 the serial number will then increment to zero
which will not play.
Memory Bank Select
Press the Memory Bank Select button to change from one memory bank to the other. When the
Menu A LED is red the keyer is in the first bank of message memories (1 - 4). Press Memory Bank
Select to change to message memories (5 - 8) and change the Menu A to LED green.
Menu B
Command Mode
The first function on menu B is the command mode. After you push the menu button F1 the keyer
will respond with "CO". Now a two character command can be entered on your paddle, keyboard
or keyer terminal. If the instruction is invalid then the keyer will send 8 rapid dots (error) and re-
turn the keyer to normal mode. If the user wishes to re-attempt modifying features using com-
mand mode, he must re-enter command mode by pressing F1 again.
Paddle
After pressing the F1 menu B button, enter a command mode command.
Keyboard
When using the keyboard, press F9 to enter command mode. Type in a two or four char-
acter command.
Keyer Terminal
In the keyer terminal you can access command mode without using the menu. Type "[co]"
to enter command mode. The keyer will echo "CO". Type in a command mode command in
upper-case.
Most of the menu commands can also be accessed through the Command Mode using the two
character shorthand found on the front panel. However, some commands are not on the menu. A
summary of those commands and a brief description of each feature follows:
Command Mode Commands
BK
Use Break On/Off to toggle break mode on and off. The keyer responds with the current
mode "ON" or "OFF". Break mode allows you to insert code into a message memory that is
playing. Press a message memory button. Now press a key on the keyboard, keyer terminal
or a paddle to break into a message. The keyer will stop sending the current message
memory. Begin sending code. After you finish sending code, press the same message but-
ton to resume playing the message where you interrupted it. Press Menu to clear a mes-
sage in break.
C#
Where # = 0 - 9. Use character break to customize the length of the inter character spac-
ing. A standard character break is 3 dot lengths long. The number following the C is the
number of extra dot lengths added to a character break.
FA
Use FA to toggle Farnsworth mode on and off. Farnsworth mode sets the speed of the ran-
dom code generator. Character speed is set to 18 words per minute while keeping the over-
all word speed at the keyer's current setting. If the keyer is set to 5 WPM in Farnsworth
mode, the keyer will send 18 WPM characters while inserting extra word break and inter
character timing to maintain an effective speed of 5 WPM. At speeds above 18 WPM the
keyer reverts to normal timing. This feature allows learners to associate Morse characters
with their sound rather than by counting dots and dashes.
Summary of Contents for Memory Keyer MFJ-493
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