MFJ Memory Keyer MFJ-493, Инструкция по эксплуатации

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MFJ-493 Instruction Manual
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Menu Operation
The MFJ-493 menu system consists of a button marked MENU, six menu buttons marked F1 - F6,
and four menu LEDs marked A-D. Pressing the MENU button changes the menu level. The keyer
will sound a key click and light the Menu LED of the new level. The row of boxes beside that LED
now contains the functions of buttons F1 - F6.
For example, to enable the Tune (key down) function, look for the box marked Output Tune on the
front panel. It is found on Menu B under the column F5. Press the MENU key until the LED marked
B lights up. Then press the F5 button. The keyer will respond by entering the Tune mode. Squeeze
the paddles or press F5 to exit that mode.
Note: If you are using a single lever (dual-contact) paddle you must always press a Menu button
(F1 - F6) instead of squeezing the paddles together. The iambic modes will not work with a
single lever paddle.
You will notice that Menu A has an LED that is lit either red or green. Menu A accesses both banks
of memories. The banks are switched with Bank Select (F6). The red LED indicates memories (1 -
4) and the green LED indicates memories (5 - 8). F5 and F6 remain Serial Number Decrement and
Bank Switch on both levels
Paddle Operation
Plug an iambic or single lever (dual contact) paddle into the paddle jack of the MFJ-493. Begin
sending code using the paddles. If you would like to change speed, sidetone, or weight see the
sections pertaining to the commands.
The iambic paddle has a unique feature that the single lever paddle does not have. Notice that the
two paddles are independent and can be squeezed together. Both the dot and dash contacts touch
the chassis, therefore ground. The MFJ-493 senses this condition and uses it as a separate keying
state. When you squeeze the paddles the keyer will automatically alternate sending code ele-
ments, dashes and dots. This is called iambic keying.
Iambic keying has two modes: A and B. In iambic A mode the keyer will stop sending as soon as
you release the paddles. In iambic B mode an extra element, either dot or dash is sent after the
paddle is released.