Icom IC-7700 - Manual (Page 16)

1-6
#3 MULTI-FUNCTION SWITCHES
Push to select the functions indicated in the LCD
display to the right of these switches.
• Functions vary depending on the operating condition.
MF1 (MULTI-FUNCTION 1 SWITCH)
➥
Selects the antenna connector from
ANT1, ANT2, ANT3 and ANT4 when
pushed. (p. 10-2)
➥ Displays antenna selection memory
when pushed and held for 1 sec.
• When the receive antenna is activated,
the antenna connected to [ANT4] is used
for receive only.
When a transverter is in use, this [ANT]
does not function and ‘TRV’ appears.
MF2 (MULTI-FUNCTION 2 SWITCH)
➥
Selects RF power (Po) , SWR, ALC,
COMP, V D or I D metering during trans-
mit. (p. 3-10)
➥ Switches the multi-function digital
meter ON and OFF when pushed and
held for 1 sec. (p. 3-10)
MF3 (MULTI-FUNCTION 3 SWITCH)
➥
Selects one of 2 receive RF preamps
or bypasses them. (p. 5-9)
• “P. AMP1” activates 10 dB preamp.
• “P. AMP2” activates 16 dB high-gain pre-
amp.
✔
What is the preamp?
The preamp amplifies signals in the receiver front end to
improve S/N ratio and sensitivity. Select “P. AMP1” or “P.
AMP2” when receiving weak signals..
MF4 (MULTI-FUNCTION 4 SWITCH)
➥
Selects 6 dB, 12 dB or 18 dB attenua-
tor when pushed. (p. 5-9)
➥
Turns the attenuator function OFF
when pushed and held for 1 sec.
(p. 5-9)
✔
What is the attenuator?
The attenuator prevents a desired signal from being dis-
torted when very strong signals are near the desired fre-
quency, or when very strong electromagnetic fields, such
as from a broadcasting station, are near your location.
ATT
OFF
P.AMP
1
METER
Po
ANT
1
1
PANEL DESCRIPTION
SSB CW RTTY/PSK AM/FM DATA
AUTO
TUNE LOCK
TS
XFC
M.SCOPE EXIT/SET
REC PLAY
VOICE MEMORY BRIGHT CONTRAST VOX GAIN MONI GAIN COMP DRIVE ANTI VOX
MONITOR
RF
DIGI-SEL NOTCH
RIT/ ∂ TX
CW PITCH
TWIN-PBT
D DELAY
F-1 F-2 F-3 F-4 F-5 F-6 F-7
LOCK TX RX SPLIT
FILTER
PBT-CLR
DIGI-SEL
APF/TPF
NOTCH
RIT
CLEAR
SPEECH
1
1.8
2
3.5
3
7
4
10
5
14
6
18
7
21
8
24
MP-W MP-R
MW V/M
A/B A=B
9
28
GENE
0
50
ENT
F-INP
∂ TX
NB
SPLIT
7700
NSCEIVER
NB
#3 #4 #5 #6 #8 #7 #9 $0 $1 $2
■
Front panel (continued)