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PANEL DESCRIPTION
2001 NEW
@3
VOX/BREAK-IN SWITCH [VOX/BK-IN]
➥
In SSB, AM and FM modes, push momentarily to
turn the VOX function ON and OFF (p. 54); push
for 1 sec. to enter VOX set mode (p. 54).
➥
In CW mode, push momentarily to turn the semi
break-in, full break-in or break-in OFF (p. 55);
push for 1 sec. to enter break-in set mode (p. 55).
✔
What is the VOX function?
The VOX function (voice operated transmission) starts trans-
mission without pushing the transmit switch or PTT switch
when you speak into the microphone; then, automatically re-
turns to receive when you stop speaking.
✔
What is the break-in function?
Full break-in (QSK) activates the receiver between transmit-
ted dots and dashes. This is useful when operating in nets,
or during DX pileups and during contests, when “fast ex-
changes” are common.
@4
MONITOR SWITCH [MONITOR]
(p. 56)
➥
Monitors your transmitted signal.
➥
Enters monitor set mode when pushed for 1 sec.
@5
FILTER SWITCH [FILTER]
(p. 49)
➥
Selects one of 3 IF filter settings.
➥
Enters the filter set mode when pushed for 1 sec.
@6
CALL SWITCH [CALL]
(p. 63)
Selects the call channel when pushed momentarily.
@7
TUNING DIAL
(p. 21)
Changes the displayed frequency, selects set mode
items, etc.
@8
LOCK/SPEECH SWITCH [LOCK/SPCH]
➥
Push momentarily to toggle the dial lock function
ON and OFF. (p. 52)
➥
Pushing for 1 sec. announces the selected read-
out frequency and S-meter indication when an
optional UT-102 is installed. (p. 89)
@9
RIT/
∂
∂
TX CONTROL [RIT/
∂
∂
TX]
(pgs. 47, 56)
Shifts the receive and/or transmit frequency without
changing the transmit and/or receive frequency
while the RIT and/or
∂
TX functions are ON.
• Rotate the control clockwise to increase the frequency,
or rotate the control counterclockwise to decrease the
frequency.
• The shift frequency range is ±9.99 kHz in 10 Hz steps.
#0
RIT SWITCH [RIT]
(p. 47)
➥
Turns the RIT function ON and OFF when pushed.
• Use the [RIT/
∂
TX] control to vary the RIT frequency.
➥
Adds the RIT shift frequency to the operating fre-
quency when pushed for 1 sec.
✔
What is the RIT function?
The RIT (Receiver Incremental Tuning) shifts the receive fre-
quency without shifting the transmit frequency.
This is useful for fine tuning stations calling you on an off-fre-
quency or when you prefer to listen to slightly different-
sounding voice characteristics, etc.
#1
CLEAR SWITCH [CLEAR]
(pgs. 47, 56)
Clears the RIT/
∂
TX shift frequency when pushed
for 1 sec.
• Can be cleared instantly when [CLEAR] is pushed if the
Quick RIT Clear is set to ON (p. 85).
#2
∂
∂
TX SWITCH [
∂
∂
TX]
(p. 56)
➥
Turns the
∂
TX function ON and OFF when
pushed.
• Use the [RIT/
∂
TX] control to vary the
∂
TX frequency.
➥
Adds the
∂
TX shift frequency to the operating
frequency when pushed for 1 sec.
✔
What is the
∂
∂
TX function?
The
∂
TX shifts the transmit frequency without shifting the re-
ceive frequency. This is useful for simple split frequency op-
eration in CW, etc.
#3
MEMORY CHANNEL SELECTOR [M-CH]
(p. 61)
Select a memory channel.
• Rotate clockwise to increase the memory channel; ro-
tate counterclockwise to decrease the memory channel.
#4
VFO/MEMORY SWITCH [VFO/MEMO]
➥
Switches the selected readout operating mode
between the VFO mode and memory mode when
pushed. (pgs. 20, 61)
➥
Transfers the memory contents to VFO when
pushed for 1 sec. (p. 64)
#5
MEMORY CLEAR SWITCH [M-CL]
(p. 62)
Clears the selected readout memory channel con-
tents when pushed for 1 sec. in memory mode.
• The channel becomes a blank channel.
• This switch does not function in VFO mode.
#6
MEMORY WRITE SWITCH [MW]
(p. 62)
Stores the selected readout frequency and operat-
ing mode into the displayed memory channel when
pushed for 1 sec.
• This function is available both in VFO and memory
modes.
#7
PBT CLEAR SWITCH [PBTC]
(p. 51)
Clears the PBT settings when pushed for 1 sec.
Low shift
High shift
RIT/
∂
TX
IC-7400.qxd 02.4.2 11:35 Page 4