Page 111FTDX5000 OPERATING MANUAL
Most RTTY operation today is accomplished using a TNC or other computer-based system that utilizes AFSK tones. As
such, the previous discussion on LSB-mode “Packet” operation will also apply for Baudot operation. RTTY operation
using a Terminal Unit (TU), or the “FSK” output from a TNC is discussed below. Also, see the illustration for details
regarding connection to your TU.
SETTING UP FOR RTTY OPERATION
Before commencing RTTY op-
eration, please direct your atten-
tion to the setup steps shown in
the chart to the right.
BASIC SETUP
1. Press the
[
RTTY
]
button briefly, to enter the RTTY
mode.
One press of the
[
RTTY
]
button will engage RTTY
operation using “LSB” injection, which is generally
used in the Amateur service. In this mode, both the
“ ” and “ ” icons will appear in the dis-
play.
To switch to USB-side injection in RTTY, press the
[
RTTY
]
button once more. Both the “ ” and
“ ” icons appear. Repeatedly pressing the
[
RTTY
]
button will toggle between LSB and USB injection on
RTTY.
2. When you begin typing on your TU or computer key-
board, the command to transmit should automatically
be sent to the transceiver, causing it to enter the trans-
mit mode.
NOTE:
If you anticipate making data transmissions of longer than
a few minutes, we recommend that you use the
[
RF PWR
]
knob to reduce the transmitter power to 1/2 ~ 1/3 of its
normal maximum.
RTTY
(
RADIO TELETYPE
)
O
PERATION
FSK
OUTPTT
FSK
IN
①④
③②
RTTY
RTTY JACK RTTY Machine
Pin 1
(
SHIFT
)
Pin 2
Pin 3
Pin 4
(
RX OUT
)
(
PTT
)
(
GND
)
FSK OUT
AF IN
PTT
GND
ADVICE:
The Mark/Space Shift utilized in most Amateur RTTY
operation is 170 Hz. Other shifts may be configured
using Menu item “097 RTTY SHIFT”.
The FTDX5000 is set up for “high tone” operation (cen-
tered on 2125 Hz) by default, but you may configure it
for low tone (1275 Hz) operation using Menu item “074
RTTY TONE”.
You may find that you are unable to decode some RTTY
stations, even if they are of sufficient signal strength.
If this is observed, there may be a Mark/Space polarity
problem between your station and the other station. If
so, try setting Menu item “093 RTTY R PLRTY” to
“REV” (“Reverse”) to see if that permits copy. A sepa-
rate Menu item permits reversal of your transmitter
Mark/Space polarity: “094 RTTY T PLRTY”.
QUICK POINT:
In the FTDX5000, “RTTY” is defined as an “FSK” mode,
whereby the closing and opening of a keying line (to
ground) causes the Mark/Space tones to alternate. The
RTTY mode is not an AFSK based mode in this trans-
ceiver and the AFSK output tones from a TNC will not
cause Mark/Space shifting to occur. Use the “Packet” mode
for AFSK-based Baudot and other data modes.
MENU ITEM
089 RTTY LCUT FRQ
090 RTTY LCUT SLP
091 RTTY HCUT FRQ
092 RTTY HCUT SLP
093 RTTY R PLRTY
AVAILABLE VALUES
OFF/100 ~ 1000 Hz
18dB/oct or 6dB/oct
OFF/700 ~ 4000 Hz
18dB/oct or 6dB/oct
NOR or REV
MENU ITEM
094 RTTY T PLRTY
095 RTTY RTTY OUT
096 RTTY OUT LEVEL
097 RTTY SHIFT
098 RTTY TONE
AVAILABLE VALUES
NOR or REV
VFO-A or VFO-B
0 ~ 100
170/200/425/850 Hz
1275/2125 Hz
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