Icom IC-7700 Instruction Manual - Page 75

Functions for the PSK decoder indication, Setting the decoder threshold level

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4 RECEIVE AND TRANSMIT D Functions for the PSK decoder indication AFC/NET F-3 WIDE F-7 HOLD/CLR RTTY/PSK F-2 EXIT/SET • AFC/NET indications "AFC" and "NET" indicators Offset frequency q Push a band key to select the desired band. w Push RTTY/PSK to select PSK. • After PSK mode is selected, push and hold RTTY/PSK for 1 sec. 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 Push and hold [HOLD/CLR] F-2 for 1 sec. to clear the displayed characters. • " HOLD " indicator disappears at the same time when the hold function is in use. 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 function ON. • " NET " appears additionally. i Push and hold [AFC/NET] F-3 for 1 sec. to add the offset frequency to the displayed frequency. o Push [WIDE] F-7 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, 12-10) !0 Push EXIT/SET to close the PSK decode screen. D Setting the decoder threshold level Adjust the PSK decoder threshold level if some characters 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 setting condition. e Rotate the main dial to adjust the PSK decoder threshold level. • Push and hold [DEF] F-6 for 1 sec. to select the default setting. r Push [ADJ] F-5 to exit from the threshold level setting condition. 4-23

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4-23
D
Functions for the PSK decoder indication
q
Push a band key to select the desired band.
w
Push
to select PSK.
• After PSK mode is selected, push and hold
for 1 sec. to toggle between PSK and PSK-R modes.
• “PSK” or “PSK-R” appears.
e
Push [DECODE]
to display the decode screen.
• When tuned into a PSK signal, decoded characters are
displayed in the RX contents screen.
r
Push [HOLD/CLR]
to freeze the current screen.
•“
” appears while the function is in use.
• Push [HOLD/CLR]
again to release the function.
t
Push and hold [HOLD/CLR]
for 1 sec. to clear
the displayed characters.
•
“
” indicator disappears at the same time when the
hold function is in use.
y
Push [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. 4-26)
u
Push [AFC/NET]
again to turn the NET func-
tion ON.
•“
” appears additionally.
i
Push and hold [AFC/NET]
for 1 sec. to add
the offset frequency to the displayed frequency.
o
Push [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, 12-10)
!
0
Push
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]
to select the threshold level set-
ting condition.
e
Rotate the main dial to adjust the PSK decoder
threshold level.
• Push and hold [DEF]
for 1 sec. to select the de-
fault setting.
r
Push [ADJ]
to exit from the threshold level set-
ting condition.
F-5
F-6
F-5
EXIT/SET
F-7
F-3
NET
F-3
NOTE:
The AFC function may not tune the signal
properly when a weak PSK signal is received.
AFC
F-3
HOLD
F-2
F-2
HOLD
F-2
F-3
RTTY/PSK
RTTY/PSK
• 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