Yaesu FT-1000MP Operating Manual page 56

Operation
RTTY Polarity - Normally a mark tone (2125 Hz
by default) is transmitted during keydown in LSB
RTTY operation. With reverse polarity, a space
tone (2295 Hz) would be generated instead. Po-
larity is changed using menu selection 6-1.
RTTY Tone Pair - Select either high or low tone-
pair operation using menu selection 6-2. If you are
using the same modem for both VHF and HF
operation and cannot software-select the tone pair
needed for each band, you may want to consider
using the low tone pairs.
High Tone Pair* Low Tone Pair
Shift Mark Space Mark Space
;_———
170 Hz* | 2125Hz| 2295 Hz
1275 Hz} 1445 Hz
425 Hz | 2125Hz| 2550Hz| 1275Hz| 1700 Hz
850 Hz | 2125Hz| 2975Hz]| 1275Hz| 2125Hz
* indicates default setting (used by normal convention)
RTTY Frequency Display Offset - By default, the
frequency displayed on the front panel during
RTTY operation is the frequency of the mark
signal, but if you prefer to display the (suppressed)
carrier frequency, use menu selection 6-3.
Display Offset for RTTY Operation
Space Mark
Tone Tone
RTTY Offset
2295 Hz sia Hz (Mark Tone)
—————«
(4¥.G48.75
4170-Hz | (14.070 MHz - 2125 Hz)
Shift |
14.070 MHz
Carrier Frequency
(suppressed)
Space Mark
Tone Tone H
2295Hz
2125HzZ
:
Carrier
(optional)
fu nan An
uo tu.uu
170-Hz
Shift
14.070 MHz
Carrier Frequency
(suppressed)
page 54
RTTY Operation
To operate, just press the RTTY mode button
once or twice to select the desired sideband for
operation. LSB is default, and is used by normal
convention (USB can be selected for MARS or
other applications). Should you need reverse tone
polarity or non-standard shift (other than 170 Hz),
configure menu selection 6-1 and 6-2 as desired.
For optimum signal-to-noise ratio, use the 250-
Hz BANDWIDTH selection for 170-Hz shift, the 500-
Hz selection for 425-Hz shift, or the 2.0-kHz
selection for 850-Hz shift. Remember Sub VFO
receiver bandwidth is only selectable between 6.0
kHz, 2.4 kHz and 500 Hz (optional YF-100 re-
quired) for RTTY and PKT.
Before transmitting, preset the RF PWR control
fully counter-clockwise, and set the METER selec-
tor to ALC. Key the transmitter (you can use the
MOX button) and adjust the Mic control for mid-
scale indication. Now you can switch the METER
selector to PO and set the RF PWR control for the
desired power output.
Note that for AMTOR operation, you must have
the VOX button off, and may need to set the AGC
control to FAST or OFF (and reduced RF Gain for
Mode A (ARQ).