Rtty ( Radio Teletype ) Operation - Yaesu FT DX 9000 CONTEST 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 operation, as well. For RTTY
operation 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.
A
DVICE
One press of the [ RTTY ] Mode switch will engage
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 ] 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.
N
OTE
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 9000 Contest, "RTTY" is a mode defined as being an "FSK" mode, whereby the closing and
DX
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 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 9000 C O
DX ONTEST
R R R R R TTY
2 1
RTTY
S U
ETTING P FOR
B
ASIC
Q
UICK
M
PERATION 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
M M
ENU ODE
MODE-RTY 073 POLARITY-R
MODE-RTY 074 POLARITY-T
MODE-RTY 075 RTTY SHIFT
MODE-RTY 076 RTTY TONE
S
ETUP
There is no adjustment of the receiver output
level from Pin 1 ("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 Ama-
teur RTTY operation is 170 Hz. Other shifts
may be configured, however, using Menu item
"MODE-RTY 075 RTTY SHIFT."
The FT 9000 Contest is set up for "high
DX
tone" operation (centered on 2125 Hz) by de-
fault, but you may configure it for low tone
(1275 Hz) operation using Menu item "MODE-
RTY 076 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 073 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 074 POLARITY-T."
P
OINT
) O O O O O
T T T T T
YPE YPE YPE PERA PERA PERA TION TION TION TION
YPE YPE PERA PERA TION
PTT FSK OUT AF IN
S
ETUP
NOR/REV
NOR/REV
170 Hz
2125 Hz
A
DVICE
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