Rtty (Radio Teletype) Operation; Rtty Decode - Yaesu FT DX 3000 Operating Manual

rTTy ( r
aDiO
The FT 3000 is equipped with a RTTY decode function. You can easily synchronize by aligning the marker displayed
DX
on the AF-FFT screen, together with the decode screen while receiving a signal. Mark frequency (2125 Hz), SHIFT
width (170 Hz), and baudot code (US) can be changed in Menu Mode.
1. Before operating, set the Menu items in the chart to
the right.
2. Press the [ MODE ] switch, set the operating mode to
"RTTY LSB".
a :
dviCe
 Press 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 RTTY in
LSB.
3. Tune to a RTTY signal, press and hold the [ SCOPE ]
switch for one second or longer.
The RTTY DECODE screen displays, and the de-
coded text is displayed on the screen.
a :
dviCe
 Align the peak of the received signal with the mark
frequency and shift frequency marker of the AF-FFT
screen.
 If text is displayed due to noise and band clutter,
when a RTTY signal is not being received, turn the
[ CLAR/VFO-B ] knob to adjust and threshold level.
Displays the RTTY signal
decoded.
Displays content written to
the RTTY text Memory
※ If you transmit content written to the RTTY text Memory
(right page), the transmitted RTTY signal is displayed as
text.
Note that transmitted text changes to white.
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 [ CLAR/VFO-B ] knob, and adjust the
threshold level (between 0 and 100) so scrambled
text is not displayed.
 Note 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.
Page 104
T
eleType
rtty d
RTTY DEC ODE
C Q C Q C Q D E
C Q C Q C Q D E
※
Threshold Level Adjustment
) O
peraTiOn
eCode
M i
enu teM
094 POLARITY-R
095 POLARITY-T
097 RTTY SHIFT
098 RTTY MARK FREQ
n :
ote
 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 1/2 and 1/3
using Menu item "177 TX MAX POWER".
To cancel the RTTY decode function, press and hold the
[ SCOPE ] switch again for one second or longer.
JA 
W  D C X
AF-FFT display (see page 41)
("Spectrum" or "Waterfall" display)
 The threshold level is displayed in the VFO-B
frequency display.
FT
DX
a v
vailaBle alues
NOR ( normal ) / REV ( reverse )
NOR ( normal ) / REV ( reverse )
170 / 200 / 425 / 850 (Hz)
1275/2125 ( Hz )
AF-FFT
Threshold level
3000 O M
peraTing anual