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Page 103FT
DX
1200 OPERATING MANUAL
RTTY
(
RADIO TELETYPE
)
OPERATION
The
FT
DX
1200
has the capability of a 5TTY decode function when the optional FFT unit is installed. You can easily
synchroni]e by aligning the marker displayed on the $F-FFT screen, together with the decode screen while receiving a
signal. 0ark freTuency 1 H]), SHIFT width 170 H]), and baudot code US) can be changed in 0enu 0ode.
RTTY DECODE
(
WITH OPTIONAL FFT UNIT
)
1. Before operating, set the 0enu items in the chart to
the right.
. 3ress the
[
MODE
]
switch, set the operating mode to
RTTY LSB
”.
A
DVICE:
3ress and hold the
[
MODE
]
switch for approxi-
mately one second to switch back and forth between
RTTY USB
” and “
RTTY LSB
”.
Generally, amateur band stations operate 5TTY in
LSB.
3. Tune to a 5TTY signal, press and hold the
[
SCOPE
]
switch for one second or longer.
The 5TTY '(C2'( screen displays, and the de-
coded text is displayed on the screen.
A
DVICE:
$lign the peak of the received signal with the mark
freTuency and shift freTuency marker of the $F-FFT
screen.
If text is displayed due to noise and band clutter,
when a 5TTY signal is not being received, turn the
[
VFO-B/CLAR
]
knob to adjust and threshold level.
MENU ITEM AVAILABLE VALUES
094 POLARITY-R NOR
(
normal
)
/ REV
(
reverse
)
095 POLARITY-T NOR
(
normal
)
/ REV
(
reverse
)
097 RTTY SHIFT 170 / 200 / 425 / 850 (Hz)
098 RTTY MARK FREQ 1275/2125
(
Hz
)
Threshold Level Adjustment
Scrambled text may be displayed due to noise and band clutter, when a signal is not being received. You can ad-
just the threshold level so the scrambled text is not displayed.
Turn the
[
VFO-B/CLAR
]
knob, and adjust the
threshold level between 0 and 100) so scrambled
text is not displayed.
1ote that text will no longer be displayed for
weak signals if you increase the level too much.
You switch between threshold level display and
normal display each time you press the
[
SE-
LECT
]
button.
The threshold level is displayed in the TFT dis-
play.
NOTE:
Cross talk, noise, phasing, and the like may prevent
correct display.
If continuously sending for more than a few minutes
or if sending time is longer than receiving time, re-
duce transmit power output to between 1 and 13
using 0enu item “
177 TX MAX POWER
”.
To cancel the 5TTY decode function, press and hold the
[
SCOPE
]
switch again for one second or longer.
Displays the decoded RTTY
signal.
Displays content written to
the RTTY text memory
ɦ
ɦ
If you transmit content written to the RTTY text memory
(page 104), the transmitted RTTY signal is displayed as
text.
Note that transmitted text is displayed in white.
#(((6
%3 %3 %3 &'
9
:
&%
%3 %3 %3 & ,#'Ჹ
466;
&'%1&'
AF-FFT display (see page 40)
(“Spectrum” or “Waterfall” display)
Threshold level
105


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  • Green Light on VFO A and MEM is flashing and no audio. Even tried Factory Reset and still flashing. How do I fix this? Submitted on 6-12-2022 at 07:37

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