Icom IC-7600 Instruction Manual page 11

MF3 (MULTI-FUNCTION 3 SWITCH)
P.AMP SWITCH (P.AMP) (p. 72)
➥ Selects one of 2 receve RF preamps
or bypasses them.
• "P. AMP1" actvates a 10 dB preamp.
• " P. AMP2" actvates a 16 dB hgh-gan
preamp.
• "P. AMP OFF" can also be selected.
➥ Turns the preamp functon OFF when
pushed and held for 1 sec.
✔ What is the preamp?
The preamp amplfies sgnals n the front end to m-
prove the S/N rato and senstvty. Select "P. AMP1"
or "P. AMP2" when recevng weak sgnals.
MF4 (MULTI-FUNCTION 4 SWITCH)
ATT SWITCH (ATT) (p. 72)
➥ Selects a 6 dB, 12 dB or 18 dB attenu-
ator when pushed.
• "ATT OFF" can also be selected.
➥ Turns the attenuator functon OFF
when pushed and held for 1 sec.
✔ What is the attenuator?
The attenuator prevents a desred sgnal from beng
dstorted when very strong sgnals are near t, or
when very strong electromagnetc fields, such as
from a broadcastng staton, are near your locaton.
MF5 (MULTI-FUNCTION 5 SWITCH)
AGC SWITCH (AGC) (p. 74)
➥ Actvates and selects a fast, mddle
or slow AGC tme constant when
pushed.
• In the FM mode, only "FAST" s aval-
able.
➥ Selects the AGC set mode when
pushed and held for 1 sec.
The AGC tme constant can be set be-
tween 0.1 and 8.0 sec.
, or turned OFF. When the
the mode)
AGC s OFF, the S-meter does not
functon.
✔ What is the AGC?
The AGC controls the recever gan to produce a
constant audo output level, even when the receved
sgnal strength vares dramatcally. Select "FAST"
for tunng and then select "MID" or "SLOW," depend-
ng on the recevng condton.
MF6 (MULTI-FUNCTION 6 SWITCH)
VOX SWITCH (VOX) (p. 84)
✔ What is the VOX function?
The VOX functon (voce operated transmsson)
actvates transmsson wthout pushng the trans-
mt swtch or PTT swtch when you speak nto the
mcrophone; then automatcally returns to receve
when you stop speakng.
BK-IN SWITCH (BK-IN) (p. 85)
✔ What is the break-in function?
The break-n functon swtches transmt and receve
wth CW keyng. Full break-n functon (QSK), you
can montor the receve sgnal durng keyng.
MF7 (MULTI-FUNCTION 7 SWITCH)
COMP SWITCH (COMP) (p. 86)
✔ What is the speech compressor?
The speech compressor compresses the transmt-
ter audo nput to ncrease the average audo output
level, n order to ncrease talk power. Ths functon s
effectve for long-dstance communcaton, or when
propagaton condtons are poor.
1
⁄ SWITCH (
4
(dependng on
TONE SWITCH (TONE) (pgs. 62, 63)
PANEL DESCRIPTION
➥ Push to turn the VOX functon ON
or OFF durng the SSB, AM and FM
mode operaton.
➥ Push and hold for 1 sec. to select the
VOX set mode.
➥ Selects sem break-n, full break-n op-
eraton n the CW mode, or turns the
break-n operaton OFF when pushed.
➥ Turns the speech compressor ON or
OFF n the SSB mode.
➥ Selects the compresson between nar-
row, md or wde when pushed and
held for 1 sec.
1
⁄ ) (p. 30)
4
➥ Turns the ⁄ speed tunng functon ON
1
4
or OFF n the SSB data, CW, RTTY
and PSK modes.
• The 1 ⁄ functon sets the dal speed to
4
⁄ of t's normal speed for fine tunng.
1
4
➥ Swtches between the tone encoder,
tone squelch functon and no-tone op-
eraton when pushed n the FM mode.
➥ Selects the tone set mode when
pushed and held for 1 sec. n
mode.
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
FM
the
20
21
4