Rtty (Radio Teletype) Operation - Yaesu FTDX9000D Operation Manual

RTTY (R
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.
H 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.
H To switch to USB-side injection in RTTY, press the RTTY
mode switch once more. Both the "RTTY" and "USB" LEDs
will now be illuminated. Repeatedly pressing the RTTY but-
ton 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
H If you anticipate making data transmissions of longer
than a few minutes, we recommend that you use the
RF PWR control to reduce the transmitter power to
1/2 ~ 1/3 of its normal maximum.
Advice
H 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.
H The Mark/Space Shift utilized in most Amateur RTTY
operation is 170 Hz. Other shofts may be configured,
however, using Menu item MODE-RTY 067 RTTY
SHIFT.
FT 9000D O
DX PERATION
T
ADIO
2 1
RTTY
②
①
S U
ETTING P FOR
B
ASIC
M
ANUAL
T
ELE YPE
RTTY JACK RTTY Machine
③
Pin 1 AF IN
④
Pin 2 PTT
Pin 3 GND
Pin 4 FSK OUT
RTTY O
PERATION
Menu Mode
MODE-RTY 065 POLARITY-R
MODE-RTY 066 POLARITY-T
MODE-RTY 067 RTTY SHIFT
MODE-RTY 068 RTTY TONE
S
ETUP
H The FT
9000 is set up for "high tone" operation
(centered on 2125 Hz) by default, but you may con-
figure it for low tone (1275 Hz) operation using Menu
item MODE-RTY 068 RTTY TONE.
H 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 MODE-RTY 065
POLARITY-R to "REV" ("Reverse") to see if that
permits copy. A separate Menu item permits reversal
of your transmitter's Mark/Space polarity: MODE-
RTY 066 POLARITY-T.
Quick Point
In the FT 9000, "RTTY" is a mode defined as being an
"FSK" mode, whereby the closing and opening of a key-
ing line (to ground) causes the Mark/Space tones to alter-
nate. 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.
) O
PERATION
PTT FSK OUT AF IN
Setup
NOR/REV
NOR/REV
170Hz
2125Hz
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