Bedienungsanleitung Icom IC-7600 (Seite 11 von 180) (Englisch)

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MF3 (MULTI-FUNCTION 3 SWITCH)

P.AMP SWITCH (P.AMP) (p. 72)

 ➥ Selects one of 2 receive RF preamps

or bypasses them.

• “P. AMP1” activates 10 dB preamp.

• “ P. AMP2” activates 16 dB high-gain pre-

amp.

• “P. AMP OFF” can also be selected.

 ➥ Turns the preamp function OFF when

pushed and held for 1 sec.

✔ What is the preamp?

he preamp amplifies signals in the front end to

improve S/N ratio and sensitivity. Select “P. AMP1”

or “P. AMP2” when receiving weak signals.

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 function OFF

when pushed and held for 1 sec.

✔ What is the attenuator?

he attenuator prevents a desired signal from

being distorted when very strong signals are near

the desired frequency, or when very strong electro-

agnetic fields, such as from a broadcasting sta-

tion, are near your location.

MF5 (MULTI-FUNCTION 5 SWITCH)

AGC SWITCH (AGC) (p. 74)

 ➥ Activates and selects fast, middle

or slow AGC time constant when

pushed.

• In FM mode, only “FAST” is available.

 ➥ Enters the AGC set mode when

pushed and held for 1 sec.

AGC time constant can be set be-

tween 0.1 to 8.0 sec. (depends on

mode)

, or turned OFF. When AGC is

“OFF,” the S-meter does not function.

✔ What is the AGC?

he AGC controls receiver gain to produce a con-

tant audio output level, even when the received

signal strength varies dramatically. Select “FAST”

for tuning and then select “MID” or “SLOW” de-

pending on the receiving condition.

MF6 (MULTI-FUNCTION 6 SWITCH)

VOX SWITCH (VOX) (p. 84)

 ➥ Push to turn the VOX function ON and

OFF during SSB, AM and FM mode

operation.

 ➥ Push and hold for 1 sec. to enter VOX

set mode.

✔ What is the VOX function?

he VOX function (voice operated transmission)

activates transmission without pushing the trans-

mit

switch or PTT switch when you speak into the

microphone; then automatically returns to receive

when you stop speaking.

BK-IN SWITCH (BK-IN) (p. 85)

 ➥ Selects semi break-in, full break-in

operation, or turns the break-in opera-

tion OFF when pushed in CW mode.

✔ What is the break-in function?

he break-in function switches transmit and re-

ive with CW keying. Full break-in function (QSK)

can monitor the receive signal during keying.

MF7 (MULTI-FUNCTION 7 SWITCH)

COMP SWITCH (COMP) (p. 86)

 ➥ Turns the speech compressor ON and

OFF in SSB mode.

 ➥ Switches the narrow, middle or wide

compression when pushed and held

for 1 sec.

✔ What is the speech compressor?

The speech compressor compresses the trans-

mit

ter audio input to increase the average audio

output level, to increase talk power. This function is

effective for long-distance communication or when

propagation conditions are poor.

⁄

SWITCH (

⁄

) (p. 30)

 ➥ Turns the

⁄4 speed tuning function

ON and OFF in SSB data, CW, RTTY

and PSK modes.

•

⁄4 function sets dial rotation to

⁄4 of

normal speed for ﬁne tuning.

TONE SWITCH (TONE) (pgs. 62, 63)

 ➥ Switches between the tone encoder,

tone squelch function and no-tone op-

eration when pushed in FM mode.

 ➥ Enters the tone set mode when

pushed and held for 1 sec. in FM

mode.

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