Rtty (Radio Teletype) Operation - Yaesu FTDX9000MP Operation 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 apply for Baudot oeration, as well. For RTTY opera-
tion using a Terminal Unit (TU) or the "FSK" output from a TNC, please see the discussion below. See also the illustration
for details regarding connection to your TU.
Before commencing RTTY operation, please direct your
attention to the setup steps below.
1. Press the [ RTTY ] Mode switch to enter the RTTY
mode.
One press of the [ RTTY ] Mode switch will en-
gage RTTY operation using "LSB" injection,
which is generally used in the Amateur service. In
this mode, both the "RTTY" and "LSB" LEDs will
light up.
To switch to USB-side injection in RTTY, press
the [ RTTY ] Mode switch once more. Both the
"RTTY" and "USB" LEDs will now be illumi-
nated. Repeatedly pressing the [ RTTY ] Mode
switch will toggle between LSB and USB injec-
tion 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.
N N N N N
O O O O O TE
If you anticipate making data transmissions of
longer than a few minutes, we recommend that you
use the [ RF PWR ] control to reduce the transmit-
ter power to 1/2 ~ 1/3 of its normal maximum.
In the FT 9000MP, "RTTY" is a mode defined as being an "FSK" mode, whereby the closing and opening of a
DX
keying line (to ground) causes the Mark/Space tones to alternate. The RTTY mode is not an AFSK based mode in
this transceiver, 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.
FT 9000MP O
DX PERATION
R R R R R TTY
RTTY
S U
ETTING P FOR
B
ASIC
TE TE TE TE
Q Q Q Q Q
UICK UICK UICK UICK UICK
M
ANUAL
TTY ( ( ( ( ( R R R R R
TTY TTY T T T T T
TTY
ADIO ADIO ADIO ELE ELE ELE
ADIO ADIO ELE ELE
RTTY JACK RTTY Machine
② ③
Pin 1 AF IN
① ④
Pin 2 PTT
Pin 3
GND
Pin 4
FSK OUT
RTTY O
PERATION
Menu Mode
MODE-RTY 072 POLARITY-R
MODE-RTY 073 POLARITY-T
MODE-RTY 074 RTTY SHIFT
MODE-RTY 075 RTTY TONE
S
ETUP
There is no adjustment of the receiver output
level from Pin 2 ("RX OUT") of the [ RTTY ]
jack on the rear panel; please make any needed
level adjustments at the TU side.
The Mark/Space Shift utilized in most Amateur
RTTY operation is 170 Hz. Other shofts may
be configured, however, using Menu item
"MODE-RTY 074 RTTY SHIFT".
The FT 9000MP is set up for "high tone"
DX
operation (centered on 2125 Hz) by default, but
you may configure it for low tone (1275 Hz)
operation using Menu item "MODE-RTY 075
RTTY TONE".
You may find that you are unable to decode
some RTTY stations, even if they are of suffi-
cient signal strength. If this is observed, there
may be a Mark/Space polarity problem between
your station and the other station. If so, try set-
ting Menu item "MODE-RTY 072 POLAR-
ITY-R" to "REV" ("Reverse") to see if that
permits copy. A separate Menu item permits re-
versal of your transmitter's Mark/Space polar-
ity: "MODE-RTY 073 POLARITY-T".
P P P P P
OINT OINT OINT OINT OINT
) ) ) ) ) O O O O O
T T T T T
YPE YPE YPE PERA PERA TION PERA TION TION TION
YPE YPE PERA PERA TION
PTT FSK OUT AF IN
Setup
NOR/REV
NOR/REV
170Hz
2125Hz
A A A A A
D D D D D VICE VICE VICE
VICE VICE
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