Page 81
FT
DX
1200 O
PERATING
M
ANUAL
CW S
POTTING
(
Z
ERO
-B
EATING
)
“Spotting”
]
eroing in on another CW station) is a handy techni
T
ue to ensure you and the other station are precisely on
the same fre
T
uency.
The Tuning
2
ffset Indicator in the display may also be moved so you can adjust your receiver fre
T
uency to center the
incoming station on the pitch corresponding to that of your transmitted signal.
Using the Auto Zeroing System
2
nly when the optional FFT unit is installed)
3
ress the [
S
/
T
/
W
/
X
] button to select the “
ZIN/
SPOT
”.
3
ress the [
SELECT
] switch momentarily to
adjust the receiving fre
T
uency to the
]
ero-in automati-
cally while receiving the CW signal.
Using the SPOT System
3
ress the [
S
/
T
/
W
/
X
] button to select the “
ZIN/
SPOT
”.
3
ress the [
MONI
] button, then while pressing
the front panel [
SELECT
] button, the Spot tone will be
heard through your speaker. This tone corresponds to the
pitch of your transmitted signal. If you adjust the receiv-
er fre
T
uency until the pitch of the received CW signal
matches that of the Spot tone, your transmitted signal
will be precisely matched to that of the other station.
5
elease the [
SELECT
] button to turn the Spot tone off.
A
DVICE
:
In a tough
';
pile-up, you may actually want to
use the S
32
T system to
¿
nd a “gap” in the spread
of calling stations, instead of
]
eroing in precisely
on the last station being worked by the
';
station.
From the
';
side, if a do
]
en or more operators
also
using Yaesu’s S
32
T system) all call precisely on the
same fre
T
uency, their dots and dashes merge into a
single, long tone that the
';
station cannot decipher.
In such situations, calling slightly higher or lower in
fre
T
uency may get your call through.
The Tuning
2
ffset Indicator in the display may be
utili
]
ed for CW fre
T
uency adjustment, as well. Its
con
¿
guration is set via
0
enu item “
011 BAR DIS-
PLAY SELECT
” at the factory, and the Tuning
2
ffset
Indicator is already set to the “
CW TUNE
” selection.
Q
UICK
P
OINTS
:
The CW Spotting process utili
]
es the Spot tone or
the Tuning
2
ffset Indicator. The actual offset pitch
is set by
0
enu item “
056 CW PITCH
”. The offset
pitch may be set to any fre
T
uency between 300 H
]
and 10
0 H
]
, in
0 H
]
steps. You can either match
tones audibly
using the [
SELECT
] button) or tune
the receiver fre
T
uency so that the central red marker
on the Tuning
2
ffset indicator lights up.
1
ote that
there are 31 “dots” on the Tuning
2
ffset Indicator,
and depending on the resolution selected, the incom-
ing CW signal may fall outside the visible range of
the bar indicator, if you are not reasonably close to
the proper alignment of tones.
CW C
ONVENIENCE
F
EATURES
The displayed fre
T
uency on CW normally reflects
the “
]
ero beat” fre
T
uency of your offset carrier. That
is, if you were to listen on USB on 14.100.00
0
H
]
to a signal with a 700 H
]
offset, the “
]
ero beat” fre-
T
uency of that CW carrier would be 14.100.70
0
H
]
the latter fre
T
uency is what the
FT
DX
1200
displays,
by default. However, you can change the display to
be identical to what you would see on SSB by using
0
enu item “
066 CW FREQ DISPLAY
” and setting
it to “
DIRECT FREQ
” instead of the default “
PITCH
OFFSET
” setting.
[SELECT] Button
[MONI] Button
ZIN/SPOT Indicator
Retune: Shift to Higher Frequency
Retune: Shift to Lower Frequency
Zero-In
