MFJ-452 CW Keyboard Instruction Manual
3
Message Memories
The MFJ-452 has eight 250-character message memories. These memory locations are represented by the
function keys F1-F8. To record a message to memory, press and hold the Alt key while selecting a
memory position. When the MFJ-452 signals the characters "--. ---" or "GO" in Morse, it is ready to
record the message, which is displayed on the bottom line of the LCD readout as it is typed. If the typed
message exceeds 240 characters in length, playback frequency lowers to indicate that memory is short.
Characters may be removed from memory by using the Backspace and new characters may be entered.
No more than 250 characters may be stored in any message location. Any attempt to enter additional
characters will generate a long, low-frequency tone for each character entered.
To complete the saving of a message, press Enter. An end of message character (.-.-.) will sound to
confirm the save. A programmed message can be replayed by pressing the appropriate function key F1-
F8. The keyer will display a lower case character to indicate message play when the function key is
pressed. The character "a" is displayed in the buffer when sending message 1 (F1).
example: Select Alt-F2. The keyer signals "--. ---" to indicate readiness. Type the message "AA5MT
BEACON BEACON 5 W BEACON." Press Enter and the message is stored at memory
location F2. Select F2 to play message.
Removal of Message
To remove the message, choose the designated function key (F1-F8) you want to remove (F2 in this case).
Press the Alt & that function key then Enter without typing or keying anything into memory. The
message is now removed.
Embedded Commands
Note: To use the "Ctrl-#" command, where "#" represents a keyboard character, press and hold Ctrl,
press and release the "#" key, then release the Ctrl key.
While a message is being saved, one or more embedded commands may be added as special features.
Ctrl-L creates a repeating message. Use the Ctrl-L at the end of the message before pressing Enter. The
MFJ-452 will play the message to the point where Ctrl-L is entered and then repeat.
example: AA5MT BEACON 5 W Ctrl-L Enter. This message repeats until Esc is pressed.
Ctrl-P creates a timed pause within a message. Use Ctrl-P followed by four numbers in a "xxxx" format
to set the pause duration from 00 minutes, 01 seconds to 99 minutes, 99 seconds.
example: CQ CQ CQ DE KB5JOB Ctrl-P 0045 Ctrl-L Enter. This message repeats every 45 seconds
until Esc is pressed.
Ctrl-S controls the serial numbering feature. Use Ctrl-S at the end of the message before pressing Enter.
The MFJ-452 will play the message to the point where Ctrl-S is entered, at which point the serial
number is played and auto-incremented up to 9999. The serial number function sends an "N"
character for nine and a "T" for zero. A new serial number may be stored by selecting F9 to enable
the command mode and then pressing S followed by four numbers in a "xxxx" format. Pressing
F12 will decrement the serial number and the keyer will echo "D" for every decrement.
example: YOU ARE CONTACT NR Ctrl-S FOR THE BRYANT MEMORIAL WD4DAT Enter.
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