Operating Rtty (Fsk) - Icom IC-7851 Instruction Manual

5
RECEIVE AND TRANSMIT

■ Operating RTTY (FSK)

A DSP-based high-quality Baudot RTTY encoder/de-
coder is built-in to the IC-7851. When connecting a PC
keyboard, you can operates RTTY without an external
RTTY terminal or PC.
If you would rather use your RTTY terminal, consult
the equipment manual.
Before transmitting, monitor your selected operating
frequency to make sure you don't cause interference
to other stations on the same frequency.
 Connect a keyboard to the [USB A] port on the rear
panel:
 The Multi-function screens are OFF:
q
Push a band key to select a desired band.
w
Push the Mode key [RTTY/PSK] to select the RTTY
mode.
• After the RTTY mode is selected, hold down [RTTY/PSK] for
1 second to toggle between the RTTY and RTTY-R modes.
• "RTTY" or "RTTY-R" is displayed.
e
Push [DECODE](F).
• The RTTY decode screen is displayed.
r Rotate [MAIN DIAL] to tune a desired signal.
• Aim for a symmetrical wave form, and ensure the peak
points align with the mark (2125 Hz) and shift (170 Hz)
frequency lines in the FFT scope.
t
Rotate [RF PWR] to adjust the output power.
• The TX power readout displays the setting level.
y
Push the Multi-function [METER](
the Po meter.
u Push [F12] on the keyboard to transmit.
• The [TX] indicator lights red.
i
Type on the keyboard to enter the contents that you
want to transmit.
• The typewritten contents are displayed in the TX buffer
screen and immediately transmitted.
• The text color will be changed when transmitted.
• Push one of [F1]–[F8] to transmit the TX memory con-
tents.
o
Push [F12] on the keyboard to return to receive.
✔
For your convenience
The desired text can be typed before being transmitted.
q q to r above.
Do steps
w
Type on the keyboard to enter the message that you
want to transmit.
• The typewritten contents are displayed in the TX buffer
screen.
e
Push [F12] on the keyboard to transmit the typewrit-
ten contents.
• The color of displayed text in the TX buffer screen, will
change when transmitted.
• To cancel the transmission, push [F12] twice.
r
Push [F12] on the keyboard to return to receive.
() Multi-function keys
• Waterfall display
) key to select
✔
When an external keypad is connected, the preset con-
tents, RT1 ~ RT4 or RT5 ~ RT8, can be transmitted.
See
5-14
[RF PWR] MAIN
TX indicator
Mode keys
FFT Scope
Waterfall
Mode icon
TX power readout
For your convenience
pages 3-6 and 15-16
Band keys
[MAIN DIAL]
for details.