Icom IC-7800 User manual

1-15
■Screen menu arrangement
The following screens can be selected from the start
up screen. Choose the desired screen using the fol-
lowing chart.
Pushing [EXIT/SET] several times returns to the start
up screen. See p. 12-3 for set mode arrangement.
1
PANEL DESCRIPTION
• Spectrum scope screen (p. 5-2)
• Voice recorder screen (p. 7-3)
• RTTY decoder screen (p. 4-13)
• Memory keyer screen (CW mode; p. 4-8)
• Memory channel screen (p. 8-3)
• PSK31 decoder screen (p. 4-21)
• Scan screen (VFO mode; p. 9-4)
• Scan screen (Memory mode; p. 9-6)
• Set mode menu screen (p. 12-2)

4-5
DDConvenient functions for transmit
DDAbout CW reverse mode
CW-R (CW Reverse) mode uses the opposite side
band to receive CW signals.
Use when interfering signals are near a desired signal
and you want to use CW-R to reduce the interference.
➥During CW mode, push [CW] to select CW and CW-
R mode.
DDAbout CW pitch control
The received CW audio pitch and CW side tone can
be adjusted to suit your preference (from 300 to
900 Hz in 5 Hz steps). This does not change the oper-
ating frequency.
➥Rotate [CW PITCH] to suit your preference.
• Adjustable within 300 to 900 Hz in 25 Hz steps.
DDCW side tone function
When the transceiver is in the receive condition (and
the break-in function is OFF— p. 6-3) you can listen to
the CW side tone without actually transmitting.
This allows you to match your transmit frequency ex-
actly to another station’s by matching the audio tone.
You can also use the CW side tone (be sure to turn
OFF break-in!) to practice CW sending. CW side tone
level can be adjusted with [MONI GAIN].
[MONI GAIN]
[CW PITCH]
Push
BFO
CW-R mode (USB side)
BFO
Desired signal
CW mode (LSB side)
Interference Desired signalInterference
• Break-in function (p. 6-3)
➥Push [VOX/BK-IN] several times to select the
break-in OFF, semi break-in and full break-in.
•“BK IN”or “F-BK IN”appears when the semi break-in
or full break-in function is ON, respectively.
4
RECEIVE AND TRANSMIT

4-13
■Operating RTTY (FSK)
A DSP-based high-quality Baudot RTTY encoder/de-
coder is built-in to the IC-7800. When connecting a PC
keyboard (p. 2-6), RTTY operation can be performed
without an external RTTY terminal, TNC or PC.
If you would rather use your RTTY terminal or TNC,
consult the manual that comes with the RTTY terminal
or TNC.
qPush a band key to select the desired band.
wPush [RTTY/PSK] to select RTTY.
• After RTTY mode is selected, push [RTTY/PSK] for
1 sec. to toggle between RTTY and RTTY-R modes.
• “RTTY” or “RTTY-R” appears.
ePush [F-3•DECODE] to display the decoder screen.
• The IC-7800 has a built-in Baudot decoder.
rTo tune the 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.
• The S-meter indicates received signal strength when
signal is received.
tPress [F12] on the connected keyboard to transmit.
• [TX] indicator lights red.
yType from the keyboard to enter the contents 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.
uPress [F12] on the keyboard to return to receive.
✔ For your convenience
The transmission contents can be typed before being
transmitted.
qPerform the steps qto rabove.
wType from the connected keyboard to enter the
message that you want to transmit.
• The typewritten contents are indicated in the TX buffer
screen.
ePress [F12] of the connected keyboard to transmit
the typewritten contents.
• The color of displayed text, in the TX buffer screen, will
be changed when transmitted.
• To cancel the transmission, press [F12] twice.
rPress [F12] of the keyboard to return to receive.
FFT scope
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

4-15
DDFunctions for the RTTY decoder indication
qPush a band key to select the desired band.
wPush [RTTY/PSK] to select RTTY.
• After RTTY mode is selected, push [RTTY/PSK] for
1 sec. to toggle between RTTY and RTTY-R modes.
• “RTTY” or “RTTY-R” appears.
ePush [F-3•DECODE] to display the decoder screen.
• When tuned into an RTTY signal, decoded characters
are displayed in the RX contents screen.
rPush [F-2•HOLD/CLR] to freeze the current screen.
• “ ” appears while the function is in use.
• Push [F-2•HOLD/CLR] again to release the function.
tPush [F-2•HOLD/CLR] for 1 sec. to clear the dis-
played characters.
•“ ” indicator disappears at the same time when the
hold function is in use.
yPush [F-7•WIDE] to toggle the RTTY decode screen
size from normal and wide.
• S/RF meter type during wide screen indication can be
selected in display set mode. (pgs. 3-11, 12-11)
uPush [F-6•MAIN/SUB] to toggle the MAIN and SUB
band for decode operation.
• Dualwatch function (p. 5-16) should be ON when SUB
band is selected for decode operation.
iPush [EXIT/SET] to close the RTTY decode screen.
• Wide screen indication
DDSetting the decoder threshold level
Adjust the RTTY decoder threshold level if some char-
acters are displayed when no signal is received.
qSelect the RTTY decoder screen as described
above.
wPush [F-5•ADJ] to select the threshold level setting
condition.
eRotate the main dial to adjust the RTTY decoder
threshold level.
• Push [F-6•DEF] for 1 sec. to select the default setting.
rPush [F-5•ADJ] to exit from the threshold level set-
ting condition.
The UnShift On Space (USOS) function and new
line code can be set in the RTTY set mode. (p. 4-
18)
HOLD
HOLD
[F-6•MAIN/SUB] [F-7•WIDE]
[F-2•HOLD/CLR] [RTTY/PSK] [EXIT/SET]
4
RECEIVE AND TRANSMIT

4-18
DDRTTY decode set mode
This set mode is used to set the decode USOS func-
tion, time stamp setting, etc.
• Setting contents
qDuring RTTY mode operation, push [F-3•DECODE]
to select RTTY decode screen.
wPush [F-1•<MENU2>] to select RTTY decode menu
2, then push [F-6•SET] to select RTTY decode set
mode.
• Push [F-7•WIDE] to toggle the screen size from normal
and wide.
ePush [F-1•Y] or [F-2•Z] to select the desired set
item.
rSet the desired condition using the main dial.
• Push [F-4•DEF] for 1 sec. to select a default condition
or value.
• Push [F-3•Ω≈] to select the set contents for some
items.
tPush [EXIT/SET] to exit from set mode.
[F-1•Y] Main dial[EXIT/SET][F-2•Z][F-4•DEF]
[F-3•Ω ≈] [F-7•WIDE]
4RECEIVE AND TRANSMIT
• RTTY decode set mode screen
Turn the letter code decoding after receiving a “space”
(USOS; UnShift On Space function) capability ON
and OFF.
•ON : Decode as letter code.
•OFF : Decode as character code.
Selects the new line code of the internal RTTY de-
coder.
CR: Carriage Return, LF: Line Feed
•CR,LF,CR;LF : Makes new line with any codes.
•CR+LF : Makes new line with CR+LF code
only.
Selects the diddle condition. •BLANK : Transmits blank code during no code
transmission.
•LTRS : Transmits letter code during no code
transmission.
•OFF : Turns the diddle function OFF.
Set the FFT scope waveform averaging function from
2 to 4 and OFF. (default: OFF)
Recommendation!
If you use the FFT scope waveform for tuning, use the
default or smaller number setting is recommended.
Set the color for the FFT scope waveform.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.

4-19
DDRTTY decode set mode (continued)
4
RECEIVE AND TRANSMIT
Explicitly inserts the FIGS character even thought it is
not required by the receiving station.
•ON : Inserts FIGS.
•OFF : Does not insert FIGS.
Turn the time stamp (date, transmission or reception
time) indication ON and OFF.
•ON : Displays the time stamp.
•OFF : No time stamp indication.
Selects the clock indication for time stamp usage.
NOTE: The time won’t be displayed when “OFF”is
selected in “RTTY Time Stamp”as above.
•Local : Selects the time that set in “Time (Now).”
•UTC* : Selects the time that set in “CLOCK2.”
*The name of choice may differ according to
“CLOCK2 Name”setting (p, 11-2). “UTC”is the
default name of CLOCK2.
Selects the automatic new line code (CR+LF) trans-
mission capability.
•ON : Transmits CR+LF code once.
•OFF : Transmits no CR+LF code.
Set the text color for transmitted characters.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Selects the operating frequency indication for time
stamp usage.
NOTE: The frequency won’t be displayed when “OFF”
is selected in “RTTY Time Stamp”as above.
•ON : Displays the operating frequency.
•OFF : No operating frequency display.
Set the text color for received characters.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Set the text color for time stamp indication.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Set the text color in the TX buffer screen.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.

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.
qPush a band key to select the desired band.
wPush [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.
rTune 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.
tPress [F12] of the connected keyboard to transmit.
• [TX] indicator lights red.
yType 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.
uPress [F12] of the keyboard to return to receive.
✔ For your convenience
The transmission contents can be typed before being
transmitted.
qPerform the steps qto rabove.
wType from the connected keyboard to enter the
message that you want to transmit.
• The message is shown in the TX buffer screen.
ePress [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.
rPress [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

4-23
DDFunctions for the PSK decoder indication
qPush a band key to select the desired band.
wPush [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.
ePush [F-3•DECODE] to display the decoder screen.
• When tuned into a PSK signal, decoded characters are
displayed in the RX contents screen.
rPush [F-2•HOLD/CLR] to freeze the current screen.
• “ ” appears while the function is in use.
• Push [F-2•HOLD/CLR] again to release the function.
tPush [F-2•HOLD/CLR] for 1 sec. to clear the dis-
played characters.
•“ ” indicator disappears at the same time when the
hold function is in use.
yPush [F-3•AFC/NET] to turn the AFC function ON.
• “ ” appears.
• If a PSK signal is received within the AFC tuning range,
the decoder automatically tunes into the signal and the
offset frequency is displayed.
• The AFC tuning range is set to ±15 Hz as the default.
Optional ±8 Hz setting is available in PSK decode set
mode. (p. 2)
uPush [F-3•AFC/NET] again to turn the NET function
ON.
• “ ” appears additionally.
iPush [F-3•AFC/NET] for 1 sec. to add the offset fre-
quency to the displayed frequency.
oPush [F-7•WIDE] to toggle the PSK decode screen
size from normal and wide.
• S/RF meter type during wide screen indication can be
selected in display set mode. (pgs. 3-11, 12-11)
!0 Push [F-6•MAIN/SUB] to toggle the MAIN and SUB
band for decode operation.
• Dualwatch function (p. 5-16) should be ON when SUB
band is selected for decode operation.
!1 Push [EXIT/SET] to close the PSK decode screen.
DDSetting the decoder threshold level
Adjust the PSK decoder threshold level if some char-
acters are displayed when no signal is received.
qCall up the PSK decoder screen as described
above.
wPush [F-5•ADJ] to select the threshold level setting
condition.
eRotate the main dial to adjust the PSK decoder
threshold level.
• Push [F-6•DEF] for 1 sec. to select the default setting.
rPush [F-5•ADJ] to exit from the threshold level set-
ting condition.
NOTE: The AFC function may not tune the signal
properly when a weak PSK signal is received.
• AFC/NET indications
“AFC”and “NET”indicators Offset frequency
HOLD
HOLD
[F-3•AFC/NET] [F-6•MAIN/SUB] [F-7•WIDE]
[F-2•HOLD/CLR] [RTTY/PSK] [EXIT/SET]
4
RECEIVE AND TRANSMIT

4-26
DDPSK decode set mode
This set mode is used to set the decode USOS func-
tion, time stamp setting, etc.
• Setting contents
qDuring PSK mode operation, push [F-3•DECODE]
to select PSK decode screen.
wPush [F-1•<MENU2>] to select PSK decode menu
2, then push [F-6•SET] to select PSK decode set
mode.
• Push [F-7•WIDE] to toggle the screen size from normal
and wide.
ePush [F-1•Y] or [F-2•Z] to select the desired set
item.
rSet the desired condition using the main dial.
• Push [F-4•DEF] for 1 sec. to select a default condition
or value.
• Push [F-3•Ω≈] to select the set contents for some
items.
tPush [EXIT/SET] to exit from set mode.
[F-1•Y] Main dial[EXIT/SET][F-2•Z][F-4•DEF]
[F-3•Ω ≈] [F-7•WIDE]
4RECEIVE AND TRANSMIT
Turn the time stamp (date, transmission or reception
time) display ON and OFF.
•ON : Displays the time stamp.
•OFF : No time stamp display.
Selects the clock display for time stamp usage.
NOTE: The time won’t be displayed when “OFF”is
selected in “PSK Time Stamp”as above.
•Local : Selects the time that set in “Time (Now).”
•UTC* : Selects the time that set in “CLOCK2.”
*The name of choice may differ according to
“CLOCK2 Name”setting (p, 11-2). “UTC”is the
default name of CLOCK2.
Set the FFT scope waveform averaging function from
2 to 4 and OFF. (default: OFF)
Recommendation!
If you use the FFT scope waveform for tuning, using
the default or smaller number setting is recom-
mended.
Set the color for the FFT scope waveform.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Select the AFC (Automatic Frequency Control) func-
tion operating range from ±15 Hz (default) and ±8 Hz.
NOTE: The AFC function may not tune the signal
properly when a weak PSK signal is received.

4-27
DDPSK decode set mode (continued)
4
RECEIVE AND TRANSMIT
Selects the operating frequency display for time
stamp usage.
NOTE: The frequency won’t be displayed when
“OFF”is selected in “PSK Time Stamp”as
below left.
•ON : Displays the operating frequency.
•OFF : No operating frequency display.
Set the text color for received characters.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Set the text color for transmitted characters.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Set the text color for time stamp indication.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.
Set the text color in the TX buffer screen.
•The color is set in RGB format.
•The set color is indicated in the box beside the RGB scale.
•Push [F-3•Ω≈] to select R (Red), G (Green) and B (Blue),
and then rotate the main dial to set the ratio from 0 to 255.