MFJ-464 Instruction Manual CW Keyer/Reader
41
1. Turn off the power to the keyer.
2. Press and hold both the Mode and MSG2 buttons while turning the power on.
3. Release the buttons when DEFAULTS RESET appears on the display.
4. Resume with normal operation.
WARNING: If the MFJ-464 is behaving weird or acting erratic, try resetting the keyer
to factory defaults.
Message Memory Reset
To erase all message memories, hold down both the Mode and MSG4 buttons while turning the
power on. A confirmation message ERASE ALL MSGS? will display. Press the YES button to
clear all message memories, or press the NO button to cancel. Release the button to resume
normal operation. Remember that all stored messages will be lost!
To erase a message, select that message for recording. Without typing or keying anything into
memory, end the recording by typing ENTER or holding down any message button for two
seconds. The keyer will respond with an end-of-message character (di-dah-di-dah-dit).
Self Test
A self-test routine will check the functions of the MFJ-464. This routine checks the display, the
paddles, the front-panel buttons, the internal memory and the audio circuitry. During the self-
test, you may stop the test by turning off the unit; however, this should NOT be done during the
memory test or the memory could be corrupted. The self-test can be completed in approximately
30 seconds.
Connections of the serial port and keyboard are not necessary for this test.
Note: Performing the self-test will reset the unit to its factory default settings.
Here is the self-test procedure:
1. Turn off the power to the keyer.
2. Connect a paddle to the Key Input jack.
3. Set volume to a comfortable listening level.
4. Press and hold only the Mode button while turning the power on.
5. The test begins by displaying a copyright message and firmware version number. This is the
test of the display. This message is also sent to the serial port. Release the Mode button
before the message completes.
6. You will be prompted to press the dot and dash paddles. This assumes the dot paddle is
connected to the tip of the plug and the dash paddle to the ring of the plug. The LED should
blink once for each press.
7. You will be prompted to press each of the front-panel buttons. The LED should blink once
for each press.
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