Panel Description; Front Panel - Icom IC-78 Instruction Manual

2

PANEL DESCRIPTION

Front panel

Speaker
q
w
q POWER SWITCH [PWR]
Push momentarily to turn power ON.
• Turn the optional DC power supply ON in advance.
Push for 1 sec. to turn power OFF.
While pushing and holding [SET], push [PWR] to
enter the initial set mode . (p. 28)
w MICROPHONE CONNECTOR [MIC]
Accepts supplied or optional microphone.
• See p. 45 for appropriate microphones.
• See p. 7 for microphone connector information.
e HEADPHONE JACK [PHONES] (p. 11)
Accepts headphones.
• When headphones are connected, the internal
speaker or connected external speaker does not
function.
r AF CONTROL [AF] (inner control)
Varies the audio output level from the speaker.
t RF GAIN/SQUELCH CONTROL [RF/SQL]
(outer control; pgs. 15, 31)
Adjusts the squelch threshold level. The squelch re-
moves noise output from the speaker (closed con-
dition) when no signal is received.
• The squelch is available for all modes.
• The control can be set as the squelch plus RF gain
controls or squelch control only (RF gain is fixed at
maximum) in initial set mode.
y RIT CONTROL [RIT] (inner control; p. 19)
Shifts the receive frequency ±1.2 kHz for clear re-
ception of an off frequency signal.
• Rotate the control clockwise to increase the fre-
quency, or rotate the control counterclockwise to
decrease the frequency. "
display.
2
Function Display
PWR
e r t
" appears on the
@1 @0
y u i o
u IF SHIFT CONTROLS [SHIFT]
(outer control; p. 20)
Shifts the center frequency of the receiver's IF
passband.
• Rotate the control clockwise to shift the center fre-
quency higher, or rotate the control counterclock-
wise to shift the center frequency lower.
i LOCK SWITCH [LOCK] (p. 14)
Push momentarily to turn the dial lock function ON
and OFF.
• The dial lock function electronically locks the chan-
nel selector.
o CHANNEL SELECTOR
Selects an operating channel, sets conditions in the
quick/initial set mode items, etc.
!0 PREAMP SWITCH [P.AMP] (p. 19)
Push to turn the preamp ON or OFF.
!1 FC SWITCH [CH]
Push to change the indication, channel comment
or stored frequency. (p. 14)
This key action only for some versions.
Push for 1 sec. to entering into VFO mode. (p. 35)
!2 MEMORY CHANNEL UP/DOWN SWITCHES
[√ DN]/[UP ∫]
Push to select the operating channel. (p. 13)
Push for 1 sec. to start scanning. (p. 14)
Push to select the quick/initial set mode items
while quick/initial set mode is selected. (p. 28)
Push to select the digit of channel comment while
editing. (p. 27)
!9 !8 !7
!0 !1
!6
!5
!4
!3
!2