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O
PERATING
M
ANUAL
Electronic Keyer Operation
The built-in electronic keyer offers two iambic modes
and a mechanical “bug” keyer emulation. You will need
to connect keyer paddles to one of the
KEY
jacks to
use the keyer.
The keyer is set at the factory for iambic keying, in
which one keyer paddle produces dots, and the other
dashes. Squeezing both produces alternating dits and
dahs.
Menu selection 7-0
allows choosing three keyer
modes:
Iambic 1
- Iambic keyer with ACS (Auto-Character
Spacing) disabled. Weighting is user-selectable via
menu selections 7-1 & 7-2
.
Iambic 2
- Iambic keyer with ACS enabled. Weight-
ing is set via
menu selections 7-1 & 7-2
.
BUG
- Emulates mechanical “bug” keyer (one
paddle produces dits and the other is used to produce
dahs manually (like a straight key)).
Once the transceiver has been set up for CW trans-
mission as just described, you can activate the keyer
with the [
KEYER
] pushbutton near the lower right corner
of the front panel (its red LED should light). Now squeeze
the paddles, and adjust the
SPEED
control for the de-
sired sending speed (if you are using the bug simulator
mode, don’t squeeze both paddles; just press the “dot”
paddle).
If the dot:space and/or dash:space weighting are
not to your preference, see
menu selections 7-1
and
7-2
to configure your keyer’s settings.
You can use the keyer for both semi and full break-
in keying, as described in the previous section.
ACS (Auto Character Spacing)
This feature improves your CW sending quality by
ensuring the inter-character spacing of dots and dashes
remains constant. Although dot/dash weighting is au-
tomatically maintained at the desired ratio, the inter-
character spacing can sometimes vary from operator
to operator, and proportional spacing is sometimes not
maintained. This does not present much of a problem
during slow CW sending, but at higher speeds, the ef-
fect is more pronounced and sometimes makes copy
difficult.
ACS works on the principle that the spacing be-
tween characters should be 3x the duration of the “dot.”
If you utilize the standard 3:1 dash:dot ratio, this also
happens to be the same duration of a “dash.” Main-
taining this inter-character spacing is what prevents the
sent characters “E” and “T,” for example, from merg-
ing into what sounds like the character “A” (see illus-
tration).
ACS is activated when keyer mode “Iambic 2” is
selected from
menu function 7-0
. For memory keyer
programming using the optional
FH-1
Keypad, you
should always use keyer mode Iambic 2 during mes-
sage programming, although you can switch back to
Iambic 1 after the messages are loaded, if Iambic 1 is
more comfortable for you.
T
RANSMITTING
O
PERATION
CW Straight Key and Paddle Connections
SPOT
BK-IN KEYER
SPEED
PITCH
Morse
"A"
Morse
"A"
Morse
"E" & "T"
Morse
"E" & "T"
Inter-character
spacing too long
Inter-character
spacing too short
Without
ACS
With
ACS
Содержание MARK-V FT-100MP
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