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 10 dB preamp.
• " P. AMP2" actvates 16 dB hgh-gan pre-
amp.
• "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 amplfes sgnals n the front end to
mprove 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 6 dB, 12 dB or 18 dB attenua-
tor 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
the desred frequency, or when very strong electro-
magnetc felds, such as from a broadcastng sta-
ton, are near your locaton.
MF5 (MULTI-FUNCTION 5 SWITCH)
AGC SWITCH (AGC) (p. 74)
➥ Actvates and selects fast, mddle
or slow AGC tme constant when
pushed.
• In FM mode, only "FAST" s avalable.
➥ Enters the AGC set mode when
pushed and held for 1 sec.
AGC tme constant can be set be-
tween 0.1 to 8.0 sec.
, or turned OFF. When AGC s
mode)
"OFF," the S-meter does not functon.
✔ What is the AGC?
The AGC controls recever gan to produce a con-
stant audo output level, even when the receved
sgnal strength vares dramatcally. Select "FAST"
for tunng and then select "MID" or "SLOW" de-
pendng 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 re-
ceve wth CW keyng. Full break-n functon (QSK)
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 trans-
mtter audo nput to ncrease the average audo
output level, to ncrease talk power. Ths functon s
effectve for long-dstance communcaton or when
propagaton condtons are poor.
1 ⁄ SWITCH (
4
(depends on
TONE SWITCH (TONE) (pgs. 62, 63)
PANEL DESCRIPTION
➥ Push to turn the VOX functon ON and
OFF durng SSB, AM and FM mode
operaton.
➥ Push and hold for 1 sec. to enter VOX
set mode.
➥ Selects sem break-n, full break-n
operaton, or turns the break-n opera-
ton OFF when pushed n CW mode.
➥ Turns the speech compressor ON and
OFF n SSB mode.
➥ Swtches the narrow, mddle or wde
compresson when pushed and held
for 1 sec.
1 ⁄ ) (p. 30)
4
➥ Turns the
1 ⁄ speed tunng functon
4
ON and OFF n SSB data, CW, RTTY
and PSK modes.
• 1 ⁄ functon sets dal rotaton to
4
normal speed for fine tunng.
➥ Swtches between the tone encoder,
tone squelch functon and no-tone op-
eraton when pushed n FM mode.
➥ E n t e r s t h e t o n e s e t m o d e w h e n
pushed and held for 1 sec. n FM
mode.
1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
1 ⁄ of
4
17
18
19
20
21
4