4-21
■
Operating PSK
A high-quality DSP-based PSK31 encoder/decoder is
built-in to the IC-7800. When connecting a PC key-
board (p. 2-6), PSK31 operation can be performed
without PSK software installed on your PC.
If desired, you can also use your PSK software; con-
sult the manual that comes with the software.
q
Push a band key to select the desired band.
w
Push [RTTY/PSK] to select PSK.
• After PSK mode is selected, push [RTTY/PSK] for 1 sec.
to toggle between PSK and PSK-R modes.
• “PSK” or “PSK-R” appears.
e
Push [F-3•DECODE] to displays the decoder screen.
• The IC-7800 has a built-in PSK31 decoder.
r
Tune the desired signal with the main dial.
• The signal is properly tuned when the radiated lines in
the vector tuning indicator narrow, as show in the exam-
ple below.
• The radiated lines in the vector tuning indicator may be
displayed sporadically.
• When a PSK signal is received, the water-fall display is
activated.
• The water-fall display shows the signal condition within
the passband and a vertical line appears when a PSK
signal is received.
t
Press [F12] of the connected keyboard to transmit.
• [TX] indicator lights red.
y
Type from the connected keyboard to enter the
message that you want to transmit.
• The typewritten contents are indicated in the TX buffer
screen and transmitted immediately.
• The text color will be changed when transmitted.
• Press one of [F1]–[F8] to transmit the TX memory con-
tents.
u
Press [F12] of the keyboard to return to receive.
✔
For your convenience
The transmission contents can be typed before being
transmitted.
q
Perform the steps
q
to
r
above.
w
Type from the connected keyboard to enter the
message that you want to transmit.
• The message is shown in the TX buffer screen.
e
Press [F12] of the connected keyboard to transmit
the message.
• The color of displayed text, in the TX buffer screen, will
be changed when transmitted.
• To cancel the transmission, press [F12] twice.
r
Press [F12] of the keyboard to return to receive.
FFT scope
Vector tuning indicator
TX buffer screen
RX contents screen
Water-fall
Appears
[TX] indicator [RX] indicator
[F-3•DECODE] [RTTY/PSK]
[AF]
Main dial
Band keys
4
RECEIVE AND TRANSMIT
• Vector tuning indicator indication example
Tuned BPSK signal
BPSK/QPSK idle signal
Unmodulated signal
Tuned QPSK signal
