Icom IC-471H Instruction Manual page 7

SECTION 4 OPERATING CONTROLS
4-1 FRONT PANEL
@ METER
(9METER SWITCH
@ AGC SWITC
(3 NOISE BLANKE SWITCH
(2 VOX SWITCH
@ CDUPLEX BUTTON
49 +DUPLEX BUTTON
@ CHECK BUTTON
@ OFFSET WRITE ШЕ
@ TONE ENCODER змтен— Bead
(Q POWER SWITCH
@T/R SWITC
@MODE SELECT SWITCHE
@MIC CONNECTOR
© PHONES злс o Жау -
ФАЕ GAIN CONTROL
Ф RF GAIN CONTROL
(9 SQUELCH CONTROL
@TONE CONTROL
(9 MIC GAIN CONTROL
@RF POWER CONTROL
1. POWER SWITCH
The POWER SWITCH is a push-lock type switch which
controls the input DC power to the IC-471H. When the
external AC power supply (IC-PS15 or IC-PS30) or optional
built-in AC power supply (IC-PS35) is used, the switch also
acts as the AC power supply switch. When the switch is
pushed in and locked, power is supplied to the set. When
the switch is pushed again and released, power is cut to all
circuits except the PA unit.
2. T/R (TRANSMIT/RECEIVE) SWITCH
This switch is for manually switching from transmit to
receive and vice versa. Set the switch to RECEIVE (down)
and the IC-471H is in the receive mode. Set the switch to
TRANSMIT (up) and it switches to transmit. When switch-
ing with the PTT switch on the microphone or with the
VOX switch set to ON, the T/R switch must be in the
RECEIVE position.
3. MODE SELECT SWITCHES
Selects any one of four operating modes of FM, USB, LSB
and CW, by simply pushing the desired switch.
4. MIC CONNECTOR
Connect the supplied microphone or optional microphone
to this connector. If you wish to use a different micro-
phone, refer to the drawings on page 4.
4? TRANSMIT INDICATOR
@RECEIVE INDICATOR
@ ТОМЕ ENCODER INDICATOR
@FREQUENCY DISPLAY
@VFO/MEMORY SWITCH
VFO SWITCH
VFO EQUALIZING SWITCH
2° SCAN START/STOP BUTTON
FREQUENCY TRANSFER
^m BUTTON
ЖА „ос WRITE BUTTON
RIT SWITCH
@RIT CLEAR BUTTON
А @RIT CONTROL
; с UP/DOWN SWITCHES
@ DIAL FUNCTION SELECT
SWITCH
@SPLIT SWITCH
€) TUNING RATE SWITCH
@® TUNING CONTROL
MODE SELECTIVE SCAN SWITCH
@ DIAL LOCK AND SPEECH SWITCH
PREAMPLIFIER SWITCH
5. PHONES JACK
Accepts a standard 1/4 inch headphone plug for headphones
of 4 — 16 ohms. Stereo phones can be used without modi-
fication.
6. AF GAIN CONTROL
Controls the audio output level in the receive mode. Clock-
wise rotation increases the level.
7. RF GAIN CONTROL
Controls the gain of the RF section in the receiver. Clock-
wise rotation gives the maximum gain. As the control is
rotated counterclockwise, the needle of the METER rises,
and only signals stronger than the level indicated by the
needle will be heard.
8. SQUELCH CONTROL
Sets the squelch threshold level. To turn OFF the squelch
function, rotate this control completely counterclockwise.
To set the threshold level higher, rotate the control clock-
wise.
9. TONE CONTROL
Controls the receiver audio tone. Adjust the control to
provide comfortable reception.