![background image](http://html.mh-extra.com/html/icom/ic-7700/ic-7700_instruction-manual_612325016.webp)
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 the antenna selection mem-
ory when held down for 1 second.
• 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 the RF power
(Po)
, SWR,
ALC, COMP, V
d
or I
d
metering func-
tions during transmit. (p. 3-10)
➥
Switches the multi-function digital
meter ON or OFF when held down for
1 second. (p. 3-10)
MF3 (MULTI-FUNCTION 3 SWITCH)
➥
Selects one of 2 receive RF preamps
or bypasses them. (p. 5-10)
• “P. AMP1” activates 10 dB preamp.
• “ P. AMP2” activates 16 dB high-gain
preamp.
➥
Turns the preamp function OFF when
held down for 1 second. (p. 5-10)
✔
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 a 6 dB, 12 dB or 18 dB at-
tenuator when pushed. (p. 5-10)
➥
Turns the attenuator function OFF
when held down for 1 second. (p. 5-10)
✔
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
POWER
TUNER
TIMER
VOX
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
BK-IN
MONITOR
TRANSMIT
MIC
ELEC-KEY
PHONES
AF
RF
MIC
RF PWR
DIGI-SEL
NOTCH
RIT/
∂
TX
CW PITCH
TWIN-PBT
KEY SPEED
DELAY
F-1
F-2
F-3
F-4
F-5
F-6
F-7
LOCK
TX
RX
SPLIT
AGC VR
NR
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
i7700
HF/50MHz TRANSCEIVER
AGC
SQL
NR
NB
#3
#4 #5
#6
#8
#7
#9
$0 $1
$2
■
Front panel (continued)