MFJ-464 Instruction Manual CW Keyer/Reader
1
The Basics
Introduction
The MFJ-464 KeyReader is a full-featured memory keyer combining dual microprocessors and a
non-volatile EEPROM chip for a full featured, low cost, high reliability design. Unlike other
keyers, it uses a LCD display to set keyer functions and show the sending message. The MFJ-
464 keys CW from a paddle, a keyboard and a serial computer interface. All code parameters
are changed with an easy to use menu interface shown on the LCD display. The MFJ-464 has
four message memories of over 220 characters each which can be loaded by paddle, keyboard or
from a computer with a terminal program. The MFJ-464 can repeat messages continuously,
insert timed pauses within messages, insert an auto-incrementing serial number, have messages
call other messages or insert embedded commands into a message. Commands also can be
simply sent to the keyer in Morse code using your paddles, keyboard, terminal program on your
computer, or push-button switches on the unit.
The MFJ-464 has controls for volume and speed on the front of the unit. The paddle jack
connects to any iambic or single lever (dual contact) key paddle. The keyboard port allows use
of an optional keyboard for keyboard keying operation. The serial interface allows connection of
most RS-232 compatible computers. Some of its features:
•2-line by 16-character LCD display.
•Iambic keyer with dot and dash memories; automatic, semi-automatic or hand-key mode.
•Four messages of over 220 characters each.
•Messages may “call” other messages and contain programmed functions.
•Input queue to store multiple message activation.
•Auto-incrementing contest serial number from 001 to 9999.
•Adjustable code speed from 5 to 99 WPM.
•Farnsworth mode with speed from 10 to 99 WPM.
•Ultra speed mode allows messages at speeds up to 990 WPM.
•Adjustable weight on code elements from 25% to 75%.
•Adjustable sidetone frequency from 300 to 1000 Hz.
•Compensation for transmitter character shortening up to 25 ms.
•Keying output delay up to 20 ms to accommodate switching delay.
•Push-to-talk (PTT) hang time up to 10 seconds.
•Direct (positive) keying.
•Carrier tune and adjustable pulse tune functions for transmitter adjustment.
•Timed pauses within messages and message loop capability for continuous replay.
•Message and keyer configuration saved without battery backup.
•Internal sidetone speaker with adjustable volume.
•Support for Qwerty and Dvorak keyboards with RepeatKey feature.
•190 characters type-ahead keyboard buffer with buffer-full warning.
•Reader decodes Morse code up to 99 WPM with automatic speed tracking.
•Reader repeat buffer of 80 characters.
