MFJ-452 CW Keyboard
Instruction Manual
4
Command Mode
During normal operation, the
F9
key is used to enter the command mode. When the command mode has
been enabled, the keyer responds by signaling "CO." The unit is now ready to receive one of the available
one-character commands listed below through the keyboard or paddle. The keyer responds to an invalid
entry by returning to normal mode.
H
This command allows use of the space bar or paddle as a hand (straight) key. The keyer responds to
this command by sending :"HK." Dots and dashes are then made manually by using either the space
bar on the keyboard or one of the paddle keys. Press
Esc
to exit.
T
This command is used to set the frequency of the sidetone speaker with the keyboard by using the up
and down arrows to vary sidetone. Press
Esc
to exit.
W
This command enables the code weight settings mode. An alternating dot and dash signal is
produced and the signal is modified with the keyboard by using the up and down arrows to vary
code weight. Press
Esc
to exit.
O
This command enables the operator to turn off the output of the keyer.
S
This command is used to store a new serial number. The serial number must four digits in length,
and can range from 0000 to 9999. After entering the 4 characters, Press Enter to embed the number.
Q
This command queries the unit for code parameters. The display is in the following format:
Factory Settings
S
=
2
0
W
=
5
0
T
=
0
7
1
4
N
=
0
0
0
1
0
0
0
1
0
0
0
F
L
C
A
P
G
N
S = speed in WPM
1x = Farnsworth mode on/off
W = weight in % on time
2x = 5 character length on/off
T = sidetone frequency in Hz
3x = 6 character length on/off
N = serial number
4x = alphabetic character on/off
5x = punctuation on/off
6x = prosign on/off
7x = Numeric character
