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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
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