Icom IC-i7410 User Manual

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4
RECEIVE AND TRANSMIT
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D About the RTTY reverse mode
Received characters are occasionally garbled when
the Mark and Space signals are reversed. This rever-
sal can be caused by incorrect TNC connections, set-
ting or commands.
To receive reversed RTTY signals correctly, select the
RTTY reverse mode.
➥ Push [RTTY] to alternately select the RTTY mode
or RTTY reverse mode.
D RTTY decoder
The transceiver has an RTTY decoder for Baudot
(mark freq.: 2125 Hz, shift freq.: 170 Hz, 45 bps).
An external terminal unit (TU) or terminal node con-
nector (TNC) is not necessary for receiving a Baudot
signal.
q In the RTTY mode, push [MENU] to display the “M1”
screen (Menu 1).
w Push [RTTY](F-4) to display the “RTTY” screen.
e Push [F-2](DEC) to turn ON the RTTY decoder.
 •RTTYdecoderscreenappears.
r Push [F-2] to turn ON the Hold function to hold the
current screen.
 •“H” appears when this function is turned ON.
 •Push[F-2]againtoturnOFFtheHoldfunction.
t Hold down [F-3] for 1 second to clear the displayed
characters, if desired.
 •“H” disappears at the same time as the displayed char-
acters are cleared. (The hold function is cancelled.)
y Push [MENU] to return to the previous display.
• Setting the decoder threshold level
If some characters are displayed when no signal is re-
ceived, adjust the RTTY decoder threshold level.
q Select the RTTY decoder screen as described
above.
w Push [F-1](ADJ) to select the threshold level adjust-
ment mode.
e Rotate [DIAL] to adjust the RTTY decoder threshold
level.
 •Holddown[F-3]for1secondtoresettothedefaultset-
ting, if desired.
r Push [MENU] to save, and return to the previous
display.
The number of the decoder display lines, the Un-
Shift On Space (USOS) function and new line code
can be set in the RTTY Set mode. (p. 48)
Normal Reverse
170 Hz 170 Hz
2125 Hz 2125 Hz
BFOBFO
Space
Space
Mark
Mark
AGC 1/4 RTTY SCP
M1
DEC TPF SET
RTTY
DEC
45BPS BAUDOT
MK ⁄ SFT 2125 ⁄ 170
F2 : HOLD F3 : CLR
ADJ
H
Appears when the Hold function
is turned ON.
DEC
45BPS BAUDOT
MK ⁄ SFT 2125 ⁄ 170
F2 : HOLD F3 : CLR
≈ 9
DEC
45BPS BAUDOT
MK ⁄ SFT 2125 ⁄ 170
F2 : HOLD F3 : CLR
ADJ
Threshold level display

Icom IC-i7410 Specifications

General

Brand	Icom
Model	IC-i7410
Category	Transceiver
Language	English