MFJ CW-Elmer MFJ-419, Инструкция по эксплуатации

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MFJ-914 CW-Elmer
Version 0 13
ᓻ
2022 MFJ Enterprises, Inc.
selected WPM rate, and be able to do so repeatedly with minimal
variance. For a given WPM rate, DIT and DAH are assigned an
ideal duration, calculated by DIT(mS) = 1200/WPM. For
example, at 15WPM, the duration for a DIT is 80mS, while a
DAH will be 240mS in duration.
The top line of the display shows the target (ideal) time in mS for
a DIT or DAH, depending on selected exercise. This is followed
on the same line by the measured time the key was pressed.
The lower line displays this information graphically, with a target
shown as ”
‐
< > + “. In this line, the brackets “ < > ” represent the
target time for DITs or DAHs, with shorter times are to the right
(+), and longer times to the left (
‐
).
A marker “ * ” indicates the measured time of key press. The
objective is to time your key press so the marker falls inside the
brackets, as “ <*> “. If the marker is to the right, hold the key
longer; if on the left, shorten the hold time. Holding the key down
longer than 2 seconds will exit the exercise and return control to
the MAIN MENU.
dit^dah Pause (Intra-Character Pause)
A^B Pause (Character Pause)
WORD^WORD Pause (Word Pause)
Just as important, and perhaps more difficult to master, are the
pauses that occur between DITs and DAHs within a character,
between characters in a word, and between words. Proper timing
of these pauses could be the difference between “Y” and “TAT”,
or between “A NICE HOUSE” and “AN ICE HOUSE”, each with
totally different meanings, the first being a pleasant dwelling, the
second an igloo! To practice these exercises, the key must be
pressed two times. CW
‐
ELMER measures the pause, or key UP,
time between presses. The first press will make a low tone and
the second press will make a high tone.
The duration of each key press is not relevant; I suggest
practicing with letters “I” (..), “M” (
‐‐
), “A” (.
‐
), and “N” (
‐
.) to
develop a real
‐
world feel.
The top line of the display shows the target (ideal) time in mS for
an IntraChar Pause, Character Pause, or Word Pause,
depending on selected exercise. This is followed on the same
line by the measured time the key was released between
presses.
The lower line displays this information graphically, with a target
shown as ”
‐
< > + “. In this line, the brackets “ < > ” represent the