Icom IC-703 Instruction Manual page 18

1
PANEL DESCRIPTION
!6 RIT/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.
RIT/
SUB
Lights red while the RIT function is activated;
green while the SUB DIAL function is activated.
*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.
!7 SHIFT 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.
M-CH SHIFT M-CH
Shifts low
!8 M-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).
M-CH
Decreases
3
SHIFT M-CH SHIFT
Center Shifts high
SHIFT
Increases
!9 HEADPHONE 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.
Back of the front panel
PHONES ∫
SPEAKER √
@0 TUNER 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.
TUNER
Lights while the automatic
tuning function is activated.
@1 FRONT 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.
@2 PRE 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.
P.AMP/ATT
Lights green while the preamp is activated;
lights red while the attenuator is activated.
✔ 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.
PHONES ∫
SPEAKER √