Icom IC-7700, Инструкция по эксплуатации

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4-23
D Functions for the PSK decoder display
q
Push a band key to select the desired band.
w
Push RTTY/PSK to select PSK.
• After PSK mode is selected, hold down
RTTY/PSK
for 1
second to toggle between PSK and PSK-R modes.
• “PSK” or “PSK-R” appears.
e
Push [DECODE]
F-3
to display the decode
screen.
• When tuned into a PSK signal, decoded characters are
displayed in the RX contents screen.
r
Push [HOLD/CLR]
F-2
to freeze the current
screen.
• “
HOLD
” appears while the function is in use.
• Push [HOLD/CLR]
F-2
again to release the function.
t
Hold down [HOLD/CLR]
F-2
for 1 second to clear
the displayed characters.
•
“
HOLD
” indicator disappears at the same time when
the displayed characters are cleared. (The hold func-
tion is cancelled.)
y
Push [AFC/NET] F-3 to turn the AFC function
ON.
• “
AFC
” 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. 4-26)
NOTE: The AFC function may not tune the signal
properly when a weak PSK signal is received.
u
Push [AFC/NET]
F-3
again to turn the NET func-
tion ON.
• “ NET ” is displayed.
i
Hold down [AFC/NET] F-3 for 1 second to add
the offset frequency to the displayed frequency.
o
Push [WIDE] F-7 to toggle the PSK decode
screen size between normal and wide.
• S/RF meter type during wide screen display can be se -
lected in display set mode. (pp. 3-11, 12-10)
!0
Push EXIT/SET to close the PSK decode screen.
D
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 decode screen as described
above.
w
Push [ADJ]
F-5
to select the threshold level set-
ting condition.
e
Rotate the main dial to adjust the PSK decoder
threshold level.
• Hold down [DEF]
F-6
for 1 second to select the de-
fault setting.
r
Push [ADJ]
F-5
to exit from the threshold level
setting condition.
• AFC/NET indications
“AFC” and “NET” indicators Offset frequency
RTTY/PSK EXIT/SET
F-7
WIDE
F-3
AFC/NET
F-2
HOLD/CLR
4
RECEIVE AND TRANSMIT