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Icom IC-7800 Manual

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DD
Functions for the PSK decoder indication
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 display the decoder screen.
• When tuned into a PSK signal, decoded characters are
displayed in the RX contents screen.
r Push [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.
t Push [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.
y Push [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)
u Push [F-3•AFC/NET] again to turn the NET function
ON.
• “ ” appears additionally.
i Push [F-3•AFC/NET] for 1 sec. to add the offset fre-
quency to the displayed frequency.
o Push [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.
DD
Setting the decoder threshold level
Adjust the PSK decoder threshold level if some char-
acters are displayed when no signal is received.
q Call up the PSK decoder screen as described
above.
w Push [F-5•ADJ] to select the threshold level setting
condition.
e Rotate the main dial to adjust the PSK decoder
threshold level.
• Push [F-6•DEF] for 1 sec. to select the default setting.
r Push [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
… 71 …


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