Bedienungsanleitung Icom IC-78 (Seite 17 von 48) (Englisch)

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OPERATION

■ Mode selection

The [RF/SQL] control adjusts either the RF gain or

the squelch. The action depends on the operating

mode and the condition of the RF/SQL item in

initial

set mode

(p. 31).

•[RF/SQL] control priority

* The RF gain is set to maximum level when the [RF/SQL]

is set as [SQL] control.

The

RF gain

is used to adjust the receiver gain.

•Shallow rotation moves the S-meter to the right indicating

the signal strength which can be received.

The recommended position for RF gain is the 12

o’clock position since this sets RF gain to the max.

The

SQUELCH

removes noise output from the

speaker (closed condition) when no signal is received.

The squelch is available for the other modes.

•A segment appears in the S-meter to indicate the S-meter

squelch level.

•When set as the [RF/SQL] control

•When set as the [SQL] control

•When set as the [RF] control

■ RF gain and Squelch

Set mode setting SSB, CW, RTTY AM

rS (RF/SQL) RF/SQL RF/SQL

At (Auto) RF gain SQL*

Sq (SQL)

SQL* SQL*

(default)

RF gain adjustable

range

Maximum RF gain

Squelch is open.

S-meter squelch

threshold

Squelch is open.

S-meter squelch

threshold

Shallow Deep

Minimum RF gain

Adjustable range

Maximum RF gain

■ Basic voice receive and transmit

q Check the following in advance:

➥ Microphone is connected.

➥ [AF] control is set to minimum position.

➥ [RF/SQL] is set to center position (squelch open).

➥ [RIT] control set to center position.

Selects the desired channel to be received with the

channel selector, [√ DN]/[UP ∫], or 10-key pad.

•

The S-meter shows signal strength when signal is received.

e Adjust [AF] to the desired audio level when receiv-

ing a signal.

r Push [MODE] to select the desired operation mode,

if the received signal is in a different mode.

t If the bass or treble of the receive audio is too

strong, rotate [RIT] control to obtain clear audio.

(p. 19)

Push [TUNER] to tune the antenna tuner, if connected.

• “TUNE” indicator ﬂashes for 1 to 2 sec. for the ﬁrst tun-

ing on a channel.

u Push and hold [PTT] on the microphone, and speak

into the microphone at a normal voice level.

• The RF meter shows the output power according to your

voice level, when RF power meter is selected.

i Release [PTT] to return to receive.

[

RIT

]

[

]

[RF/SQL]

Microphone

connector

The following modes are available in the IC-78:

SSB (LSB/USB), CW, CW REV (CW reverse), RTTY,

RTTY REV (RTTY reverse) and AM.

➥ Push [MODE] to select desired operation mode.

➥ Push [MODE] for 1 sec. to change between USB

and LSB, CW and CW reverse or RTTY and RTTY

reverse. (SSB, CW and RTTY mode only)

•The selected mode is indicated in the function display.

Note: The selected mode can be used for temporary

operation only.

OPERATING MODE SELECTION

Push

momentarily

Push

for 1 sec.

USB LSB

CW CW

RTTY RTTY

MODE

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