Справочник Пользователя для ICOM IC-703

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PANEL DESCRIPTION

!6RIT/SUB DIAL SWITCH [RIT/SUB] (pgs. 21, 47)

➥Push to toggle the RIT or SUB DIAL function ON

and OFF—initial set mode is used to select the
desired action*.

• Lights green when the SUB DIAL function is ON; lights

red when the RIT function is ON.

• Use the [M-CH] control to vary the RIT frequency or

SUB DIAL frequency (see below).

➥When the RIT function is ON, push for 1 sec. to

add or subtract the shifted frequency to the oper-
ating frequency.

*Even if RIT is selected in initial set mode, RIT cannot be se-

lected when operating AM or FM modes.

✔ What is the RIT function?

The RIT (Receiver Incremental Tuning) shifts the receive fre-
quency without shifting the transmit frequency.

This is useful for fine tuning stations calling you on an off-fre-
quency or when you prefer to listen to slightly different-
sounding voice characteristics, etc.

!7SHIFT CONTROL [SHIFT] (outer control; p. 47)

Shifts the center frequency of the receiver’s IF pass-
band.

• Rotate the control clockwise to shift the center frequency

higher, or rotate the control counterclockwise to shift the
center frequency lower.

• When rotate the control, the IF passband is graphically

displayed and changes in accordance with the [SHIFT]
control.

!8M-CH CONTROL [M-CH] (inner control)

➥When the RIT or SUB DIAL functions are OFF, ro-

tate to select a memory channel number (p. 56).

➥Shifts the receive frequency while the RIT func-

tion is ON in SSB, CW and RTTY modes (see
above or p. 47).

• RIT variable range is ± 9.99 kHz

➥Changes the operating frequency in the selected

tuning steps while the SUB DIAL function is ON
(p. 21).

!9HEADPHONE JACK [PHONES] (p. 14)

Accepts headphones with 8–16

Ω impedance.

• When headphones are connected, no receive audio

comes from the speaker.

• When the PHONES/SPEAKER switch on the back of the

front panel is set to the [SPEAKER] position, an external
speaker can be connected. This is convenient for mobile
or outdoor operation.

@0TUNER SWITCH [TUNER] (pgs. 64–66)

➥Push momentarily to toggle the automatic an-

tenna tuner function ON and OFF (bypass).

• Lights red when the automatic antenna function is ON.

➥Push this switch for 1 sec. to manually tune the

antenna.

• When the tuner cannot tune the antenna, the tuning

circuit is bypassed automatically after 20 sec.

@1FRONT PANEL LATCH (p. 12)

Pull away from the transceiver (towards yourself
when looking at the front of the transceiver) to de-
tach the front panel from the main body of the trans-
ceiver.

@2PRE AMP/ATTENUATOR SWITCH [P.AMP/ATT]

(p. 46)
➥Push momentarily to turn the preamp ON or OFF.

➥Push for 1 sec. to turn the 20 dB attenuator ON;

push momentarily to turn the attenuator OFF.

• Lights green when the preamp is ON; lights red when the

20 dB attenuator is ON.

✔ What is the preamp?

The preamp amplifies received signals in the front end cir-
cuit to improve the S/N ratio and sensitivity. Turn ON ‘P.AMP’
when receiving weak signals.

✔ What is the attenuator?

The attenuator prevents a desired signal from distorting
when very strong signals are near the desired frequency, or
when very strong electric fields, such as from a broadcast-
ing station, are near your location.

Lights green while the preamp is activated;
lights red while the attenuator is activated.

Lights while the automatic
tuning function is activated.

Back of the front panel

PHONES

∫

SPEAKER

√

PHONES

∫

SPEAKER

√

Decreases

Increases

Shifts low

Center

Shifts high

Lights red while the RIT function is activated;
green while the SUB DIAL function is activated.