MFJ-464 Instruction Manual CW Keyer/Reader
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I# Iambic – enables iambic A or B mode where # represents A or B, or disables iambic
operation with # = N. The keyer will respond with "A" (di-dah), "B" (dah-di-di-dit),
or "OFF" (dah-dah-dah di-di-dah-dit di-di-dah-dit). Press ESC to cancel and exit.
J#### PTT hang time – sets the PTT (push-to-talk) hang time to #### millisecond, where
#### represents four digits in the range of 0001 to 9999. This controls the time
between when CW keying is ended and when the PTT will de-assert. You may adjust
this to your liking for on-the-air sending.
Press either the “<” or “>” to decrease or increase the hang time, or enter up to four
digits 0001 to 9999 to set the hang time. Press ENTER to accept and exit, or press
ESC to cancel and exit.
K## Keying compensation – sets the keying compensation to ## millisecond, where ##
represents two digits in the range of 00 to 25. Some radios have a key delay of 5 ms
or more. By entering K05, the keyer will add 5 ms to the dots and dashes and
subtract 5 ms from the intra-character spaces. Although similar to increasing weight,
this adjustment is independent of the speed. This setting is used primarily to correct
keying distortion by certain transceivers and to eliminate the problems with a
transmitter key delay.
Press either the “<” or “>” to decrease or increase compensation, or enter up to two
digits 00 to 25 to set the compensation time. Press ENTER to accept and exit, or
press ESC to cancel and exit.
L## Lag (keying delay) – sets the keying delay to ## millisecond, where ## represents two
digits in the range of 00 to 20. This setting is used primarily to accommodate
switching delay in certain station setup. It is used in conjunction with the PTT line to
delay the keying output until all the switching is finished; that is, the keying output is
lagged behind the sidetone audio and the PTT output. This controls the time between
when PTT is asserted and when CW keying will start.
Press either the “<” or “>” to decrease or increase delay, or enter up to two digits 00
to 20 to set the delay time. Press ENTER to accept and exit, or press ESC to cancel
and exit.
M# Monitor – enables (#=Y) or disables (#=N) the sidetone monitor, or toggles the
sidetone monitor on or off without the #. If the sidetone is turned off, it will still play
command messages and status information. To conserve power, the keyer should be
operated with the monitor off in favor of the rig’s sidetone.
To change Monitor mode type “~M” followed by “Y’ for on, “N” for off, or ENTER
to toggle. The keyer will respond with “ON” or “OFF”. Press ESC or any other key
to cancel and exit.
N#### Number – sets the serial number. The serial number can be set from 0000 to 9999
(0000 will be converted to 0001). Enter up to four digits to set the current serial
number and press ENTER to accept and exit, or press ESC to cancel and exit.
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